{"id":41540,"date":"2026-06-05T15:57:31","date_gmt":"2026-06-05T08:57:31","guid":{"rendered":"https:\/\/interdata.vn\/blog\/?p=41540"},"modified":"2026-06-05T15:59:31","modified_gmt":"2026-06-05T08:59:31","slug":"ioping-latency-la-gi","status":"publish","type":"post","link":"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/","title":{"rendered":"Ioping Latency L\u00e0 G\u00ec? \u00dd Ngh\u0129a, C\u00e1ch \u0110o V\u00e0 T\u1ea7m Quan Tr\u1ecdng Trong Hi\u1ec7u N\u0103ng L\u01b0u Tr\u1eef (2026)"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_84 counter-hierarchy ez-toc-counter ez-toc-white ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">N\u1ed8I DUNG<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#Ioping-Latency-La-Gi\" >Ioping Latency L\u00e0 G\u00ec?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#Dinh-nghia-Ioping\" >\u0110\u1ecbnh ngh\u0129a Ioping<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#Ioping-Latency-la-gi\" >Ioping Latency l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#Vi-du-thuc-te-de-de-hinh-dung\" >V\u00ed d\u1ee5 th\u1ef1c t\u1ebf \u0111\u1ec3 d\u1ec5 h\u00ecnh dung<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#Ioping-Hoat-Dong-Nhu-The-Nao\" >Ioping Ho\u1ea1t \u0110\u1ed9ng Nh\u01b0 Th\u1ebf N\u00e0o?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#Nguyen-ly-do-do-tre-cua-Ioping\" >Nguy\u00ean l\u00fd \u0111o \u0111\u1ed9 tr\u1ec5 c\u1ee7a Ioping<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#Cac-loai-phep-do-pho-bien-cua-Ioping\" >C\u00e1c lo\u1ea1i ph\u00e9p \u0111o ph\u1ed5 bi\u1ebfn c\u1ee7a Ioping<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#Cac-chi-so-thuong-xuat-hien-trong-ket-qua-Ioping\" >C\u00e1c ch\u1ec9 s\u1ed1 th\u01b0\u1eddng xu\u1ea5t hi\u1ec7n trong k\u1ebft qu\u1ea3 Ioping<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#Vi-Sao-Ioping-Latency-Quan-Trong\" >V\u00ec Sao Ioping Latency Quan Tr\u1ecdng?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#Latency-phan-anh-cam-nhan-thuc-te-cua-nguoi-dung\" >Latency ph\u1ea3n \u00e1nh c\u1ea3m nh\u1eadn th\u1ef1c t\u1ebf c\u1ee7a ng\u01b0\u1eddi d\u00f9ng<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#Nhieu-truong-hop-latency-quan-trong-hon-toc-do-doc-ghi\" >Nhi\u1ec1u tr\u01b0\u1eddng h\u1ee3p latency quan tr\u1ecdng h\u01a1n t\u1ed1c \u0111\u1ed9 \u0111\u1ecdc ghi<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#Latency-anh-huong-truc-tiep-den-hieu-nang-ung-dung\" >Latency \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn hi\u1ec7u n\u0103ng \u1ee9ng d\u1ee5ng<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#Moi-Quan-He-Giua-Ioping-Latency-Va-IOPS\" >M\u1ed1i Quan H\u1ec7 Gi\u1eefa Ioping Latency V\u00e0 IOPS<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#IOPS-la-gi\" >IOPS l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#Latency-la-gi\" >Latency l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#Cong-thuc-lien-he-giua-IOPS-va-Latency\" >C\u00f4ng th\u1ee9c li\u00ean h\u1ec7 gi\u1eefa IOPS v\u00e0 Latency<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#Vi-sao-IOPS-cao-chua-chac-VPS-nhanh\" >V\u00ec sao IOPS cao ch\u01b0a ch\u1eafc VPS nhanh?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#So-Sanh-Ioping-Latency-IOPS-Throughput-Va-Response-Time\" >So S\u00e1nh Ioping Latency, IOPS, Throughput V\u00e0 Response Time<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#Ioping-Latency\" >Ioping Latency<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#IOPS\" >IOPS<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#Throughput-Bang-thongToc-do-truyen-tai\" >Throughput (B\u0103ng th\u00f4ng\/T\u1ed1c \u0111\u1ed9 truy\u1ec1n t\u1ea3i)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#Response-Time-Thoi-gian-phan-hoi\" >Response Time (Th\u1eddi gian ph\u1ea3n h\u1ed3i)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#Bang-so-sanh-tong-quan\" >B\u1ea3ng so s\u00e1nh t\u1ed5ng quan<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#Chi-So-Ioping-Latency-Bao-Nhieu-La-Tot\" >Ch\u1ec9 S\u1ed1 Ioping Latency Bao Nhi\u00eau L\u00e0 T\u1ed1t?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#HDD-truyen-thong\" >HDD truy\u1ec1n th\u1ed1ng<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#SATA-SSD\" >SATA SSD<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-27\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#NVMe-SSD-Consumer-Dong-pho-thong\" >NVMe SSD Consumer (D\u00f2ng ph\u1ed5 th\u00f4ng)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-28\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#Enterprise-NVMe-SSD-Dong-chuyen-dung-cho-doanh-nghiep\" >Enterprise NVMe SSD (D\u00f2ng chuy\u00ean d\u1ee5ng cho doanh nghi\u1ec7p)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-29\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#VPS-su-dung-NVMe-SSD\" >VPS s\u1eed d\u1ee5ng NVMe SSD<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-30\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#Cloud-Server\" >Cloud Server<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-31\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#Dedicated-Server-May-chu-vat-ly-dung-rieng\" >Dedicated Server (M\u00e1y ch\u1ee7 v\u1eadt l\u00fd d\u00f9ng ri\u00eang)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-32\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#Bang-benchmark-tham-khao-nam-2026\" >B\u1ea3ng benchmark tham kh\u1ea3o n\u0103m 2026<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-33\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#Nhung-Yeu-To-Anh-Huong-Den-Ioping-Latency\" >Nh\u1eefng Y\u1ebfu T\u1ed1 \u1ea2nh H\u01b0\u1edfng \u0110\u1ebfn Ioping Latency<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-34\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#1-Loai-o-cung\" >1. Lo\u1ea1i \u1ed5 c\u1ee9ng<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-35\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#2-Controller-luu-tru-Bo-dieu-khien\" >2. Controller l\u01b0u tr\u1eef (B\u1ed9 \u0111i\u1ec1u khi\u1ec3n)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-36\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#3-Chat-luong-CPU\" >3. Ch\u1ea5t l\u01b0\u1ee3ng CPU<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-37\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#4-He-dieu-hanh-va-File-System\" >4. H\u1ec7 \u0111i\u1ec1u h\u00e0nh v\u00e0 File System<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-38\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#5-Muc-do-tai-cua-may-chu\" >5. M\u1ee9c \u0111\u1ed9 t\u1ea3i c\u1ee7a m\u00e1y ch\u1ee7<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-39\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#6-Moi-truong-ao-hoa\" >6. M\u00f4i tr\u01b0\u1eddng \u1ea3o h\u00f3a<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-40\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#7-Overselling-tai-nguyen-Ban-qua-tai\" >7. Overselling t\u00e0i nguy\u00ean (B\u00e1n qu\u00e1 t\u1ea3i)<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-41\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#Huong-Dan-Do-Ioping-Latency-Tren-Linux\" >H\u01b0\u1edbng D\u1eabn \u0110o Ioping Latency Tr\u00ean Linux<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-42\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#Buoc-1-Cai-dat-Ioping\" >B\u01b0\u1edbc 1: C\u00e0i \u0111\u1eb7t Ioping<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-43\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#Buoc-2-Tien-hanh-cac-lenh-kiem-tra-latency\" >B\u01b0\u1edbc 2: Ti\u1ebfn h\u00e0nh c\u00e1c l\u1ec7nh ki\u1ec3m tra latency<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-44\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#Buoc-3-Giai-thich-ket-qua-tra-ve\" >B\u01b0\u1edbc 3: Gi\u1ea3i th\u00edch k\u1ebft qu\u1ea3 tr\u1ea3 v\u1ec1<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-45\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#Cach-Doc-Va-Danh-Gia-Ket-Qua-Ioping-Dung-Cach\" >C\u00e1ch \u0110\u1ecdc V\u00e0 \u0110\u00e1nh Gi\u00e1 K\u1ebft Qu\u1ea3 Ioping \u0110\u00fang C\u00e1ch<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-46\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#Khong-chi-nhin-vao-latency-trung-binh\" >Kh\u00f4ng ch\u1ec9 nh\u00ecn v\u00e0o latency trung b\u00ecnh<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-47\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#Can-quan-tam-toi-latency-dinh-Max-Latency\" >C\u1ea7n quan t\u00e2m t\u1edbi latency \u0111\u1ec9nh (Max Latency)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-48\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#Xem-xet-do-on-dinh-cua-ket-qua-chi-so-mdev\" >Xem x\u00e9t \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh c\u1ee7a k\u1ebft qu\u1ea3 (ch\u1ec9 s\u1ed1 mdev)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-49\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#Ket-hop-voi-fio-va-sysbench\" >K\u1ebft h\u1ee3p v\u1edbi fio v\u00e0 sysbench<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-50\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#Kiem-tra-nhieu-thoi-diem-khac-nhau-trong-ngay\" >Ki\u1ec3m tra nhi\u1ec1u th\u1eddi \u0111i\u1ec3m kh\u00e1c nhau trong ng\u00e0y<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-51\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#Tam-Quan-Trong-Cua-Latency-Thap-Trong-Thuc-Te\" >T\u1ea7m Quan Tr\u1ecdng C\u1ee7a Latency Th\u1ea5p Trong Th\u1ef1c T\u1ebf<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-52\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#VPS-Hosting\" >VPS Hosting<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-53\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#Database\" >Database<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-54\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#Virtualization-Ao-hoa\" >Virtualization (\u1ea2o h\u00f3a)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-55\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#Redis-va-Cache-Server\" >Redis v\u00e0 Cache Server<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-56\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#CICD-va-Build-Server\" >CI\/CD v\u00e0 Build Server<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-57\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#Enterprise-Applications\" >Enterprise Applications<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-58\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#Nhung-Hieu-Lam-Pho-Bien-Ve-Ioping-Latency\" >Nh\u1eefng Hi\u1ec3u L\u1ea7m Ph\u1ed5 Bi\u1ebfn V\u1ec1 Ioping Latency<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-59\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#1-%E2%80%9CSSD-nao-cung-co-latency-thap-nhu-nhau%E2%80%9D\" >1. &#8220;SSD n\u00e0o c\u0169ng c\u00f3 latency th\u1ea5p nh\u01b0 nhau&#8221;<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-60\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#2-%E2%80%9CIOPS-cao-nghia-la-latency-luon-thap%E2%80%9D\" >2. &#8220;IOPS cao ngh\u0129a l\u00e0 latency lu\u00f4n th\u1ea5p&#8221;<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-61\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#3-%E2%80%9CToc-do-doc-ghi-MBs-quan-trong-hon-latency%E2%80%9D\" >3. &#8220;T\u1ed1c \u0111\u1ed9 \u0111\u1ecdc ghi MB\/s quan tr\u1ecdng h\u01a1n latency&#8221;<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-62\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#4-%E2%80%9CChi-can-benchmark-mot-lan-la-du%E2%80%9D\" >4. &#8220;Ch\u1ec9 c\u1ea7n benchmark m\u1ed9t l\u1ea7n l\u00e0 \u0111\u1ee7&#8221;<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-63\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#5-%E2%80%9CVPS-nao-dung-NVMe-cung-cho-hieu-nang-giong-nhau%E2%80%9D\" >5. &#8220;VPS n\u00e0o d\u00f9ng NVMe c\u0169ng cho hi\u1ec7u n\u0103ng gi\u1ed1ng nhau&#8221;<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-64\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#Nen-Chon-Loai-Luu-Tru-Nao-Theo-Nhu-Cau-Latency\" >N\u00ean Ch\u1ecdn Lo\u1ea1i L\u01b0u Tr\u1eef N\u00e0o Theo Nhu C\u1ea7u Latency?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-65\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#Website-WordPress-Blog-ca-nhan\" >Website WordPress \/ Blog c\u00e1 nh\u00e2n<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-66\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#Website-thuong-mai-dien-tu-WooCommerce-Magento%E2%80%A6\" >Website th\u01b0\u01a1ng m\u1ea1i \u0111i\u1ec7n t\u1eed (WooCommerce, Magento&#8230;)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-67\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#Database-Server-chuyen-dung\" >Database Server chuy\u00ean d\u1ee5ng<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-68\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#Redis-Cache-Server\" >Redis \/ Cache Server<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-69\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#He-thong-ao-hoa-VPS-Private-Cloud\" >H\u1ec7 th\u1ed1ng \u1ea3o h\u00f3a VPS \/ Private Cloud<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-70\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#He-thong-AI-Big-Data-Analytics\" >H\u1ec7 th\u1ed1ng AI, Big Data, Analytics<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-71\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#Vi-Sao-VPS-Co-Ioping-Latency-Thap-Quan-Trong\" >V\u00ec Sao VPS C\u00f3 Ioping Latency Th\u1ea5p Quan Tr\u1ecdng?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-72\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#FAQ-%E2%80%93-Cau-Hoi-Thuong-Gap-Ve-Ioping-Latency\" >FAQ \u2013 C\u00e2u H\u1ecfi Th\u01b0\u1eddng G\u1eb7p V\u1ec1 Ioping Latency<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-73\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#1-Ioping-Latency-bao-nhieu-la-tot\" >1. Ioping Latency bao nhi\u00eau l\u00e0 t\u1ed1t?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-74\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#2-Latency-duoi-01-ms-co-thuc-su-nhanh-khong\" >2. Latency d\u01b0\u1edbi 0.1 ms c\u00f3 th\u1ef1c s\u1ef1 nhanh kh\u00f4ng?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-75\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#3-IOPS-cao-co-dong-nghia-VPS-manh-hon-khong\" >3. IOPS cao c\u00f3 \u0111\u1ed3ng ngh\u0129a VPS m\u1ea1nh h\u01a1n kh\u00f4ng?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-76\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#4-SSD-NVMe-va-SSD-SATA-chenh-lech-latency-bao-nhieu\" >4. SSD NVMe v\u00e0 SSD SATA ch\u00eanh l\u1ec7ch latency bao nhi\u00eau?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-77\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#5-Co-nen-dung-Ioping-de-benchmark-VPS-khong\" >5. C\u00f3 n\u00ean d\u00f9ng Ioping \u0111\u1ec3 benchmark VPS kh\u00f4ng?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-78\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#6-Ioping-khac-gi-fio\" >6. Ioping kh\u00e1c g\u00ec fio?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-79\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#7-Lam-sao-giam-Ioping-Latency-tren-Linux\" >7. L\u00e0m sao gi\u1ea3m Ioping Latency tr\u00ean Linux?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-80\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#8-VPS-latency-thap-co-giup-website-SEO-tot-hon-khong\" >8. VPS latency th\u1ea5p c\u00f3 gi\u00fap website SEO t\u1ed1t h\u01a1n kh\u00f4ng?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-81\" href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/#9-Nen-uu-tien-IOPS-hay-Ioping-Latency-khi-thue-VPS\" >9. N\u00ean \u01b0u ti\u00ean IOPS hay Ioping Latency khi thu\u00ea VPS?<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<p>Khi v\u1eadn h\u00e0nh m\u1ed9t h\u1ec7 th\u1ed1ng <a href=\"https:\/\/interdata.vn\/blog\/website-la-gi\/\">website<\/a>, \u1ee9ng d\u1ee5ng ho\u1eb7c qu\u1ea3n tr\u1ecb <a href=\"https:\/\/interdata.vn\/blog\/may-chu-server-la-gi\/\">m\u00e1y ch\u1ee7<\/a>, nhi\u1ec1u ng\u01b0\u1eddi th\u01b0\u1eddng ch\u1ec9 quan t\u00e2m \u0111\u1ebfn c\u00e1c th\u00f4ng s\u1ed1 nh\u01b0 dung l\u01b0\u1ee3ng <a href=\"https:\/\/interdata.vn\/blog\/ram-server\/\">RAM<\/a>, s\u1ed1 l\u01b0\u1ee3ng <a href=\"https:\/\/interdata.vn\/blog\/vcpu-la-gi\/\">vCPU<\/a> hay <a href=\"https:\/\/interdata.vn\/blog\/bang-thong-la-gi\/\">b\u0103ng th\u00f4ng<\/a> m\u1ea1ng. Tuy nhi\u00ean, c\u00f3 m\u1ed9t y\u1ebfu t\u1ed1 \u00e2m th\u1ea7m nh\u01b0ng l\u1ea1i quy\u1ebft \u0111\u1ecbnh tr\u1ef1c ti\u1ebfp \u0111\u1ebfn \u0111\u1ed9 m\u01b0\u1ee3t m\u00e0, t\u1ed1c \u0111\u1ed9 ph\u1ea3n h\u1ed3i v\u00e0 hi\u1ec7u n\u0103ng t\u1ed5ng th\u1ec3 c\u1ee7a h\u1ec7 th\u1ed1ng: \u0111\u00f3 ch\u00ednh l\u00e0\u00a0<strong>\u0111\u1ed9 tr\u1ec5 l\u01b0u tr\u1eef (Storage <a href=\"https:\/\/interdata.vn\/blog\/latency-la-gi\/\">Latency<\/a>)<\/strong>.<\/p>\n<p>\u0110\u1ec3 \u0111o l\u01b0\u1eddng \u0111\u1ed9 tr\u1ec5 n\u00e0y tr\u00ean c\u00e1c h\u1ec7 th\u1ed1ng <a href=\"https:\/\/interdata.vn\/blog\/he-dieu-hanh-linux-la-gi\/\">Linux<\/a>,\u00a0<strong>Ioping<\/strong>\u00a0l\u00e0 m\u1ed9t trong nh\u1eefng c\u00f4ng c\u1ee5 g\u1ecdn nh\u1eb9 v\u00e0 hi\u1ec7u qu\u1ea3 nh\u1ea5t. V\u1eady\u00a0<a href=\"https:\/\/interdata.vn\/blog\/ioping-latency-la-gi\/\" target=\"_blank\" rel=\"noopener\"><strong>Ioping Latency l\u00e0 g\u00ec?<\/strong><\/a>\u00a0Ch\u1ec9 s\u1ed1 n\u00e0y c\u00f3 \u00fd ngh\u0129a ra sao v\u00e0 l\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 \u0111o l\u01b0\u1eddng, \u0111\u00e1nh gi\u00e1 n\u00f3 m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c? B\u00e0i vi\u1ebft n\u00e0y s\u1ebd gi\u00fap b\u1ea1n t\u00ecm hi\u1ec3u chi ti\u1ebft t\u1eeb l\u00fd thuy\u1ebft \u0111\u1ebfn th\u1ef1c h\u00e0nh th\u1ef1c t\u1ebf.<\/p>\n<hr \/>\n<h2><span class=\"ez-toc-section\" id=\"Ioping-Latency-La-Gi\"><\/span>Ioping Latency L\u00e0 G\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"Dinh-nghia-Ioping\"><\/span>\u0110\u1ecbnh ngh\u0129a Ioping<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>Ioping<\/strong>\u00a0l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 d\u00f2ng l\u1ec7nh (command-line utility) <a href=\"https:\/\/interdata.vn\/blog\/source-code-la-gi\/\">m\u00e3 ngu\u1ed3n<\/a> m\u1edf tr\u00ean Linux, \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 ki\u1ec3m tra v\u00e0 \u0111o l\u01b0\u1eddng \u0111\u1ed9 tr\u1ec5 c\u1ee7a thi\u1ebft b\u1ecb l\u01b0u tr\u1eef (\u1ed5 c\u1ee9ng HDD, SSD SATA, NVMe&#8230;).<\/p>\n<p>N\u1ebfu b\u1ea1n \u0111\u00e3 quen thu\u1ed9c v\u1edbi l\u1ec7nh\u00a0<code>ping<\/code>\u00a0d\u00f9ng \u0111\u1ec3 \u0111o \u0111\u1ed9 tr\u1ec5 m\u1ea1ng (network latency) b\u1eb1ng c\u00e1ch g\u1eedi c\u00e1c g\u00f3i tin ICMP \u0111\u1ebfn m\u00e1y ch\u1ee7 \u0111\u00edch, th\u00ec\u00a0<code>ioping<\/code>\u00a0ho\u1ea1t \u0111\u1ed9ng t\u01b0\u01a1ng t\u1ef1. Thay v\u00ec g\u1eedi g\u00f3i tin qua m\u1ea1ng, n\u00f3 th\u1ef1c hi\u1ec7n c\u00e1c y\u00eau c\u1ea7u \u0111\u1ecdc\/ghi (I\/O requests) tr\u1ef1c ti\u1ebfp l\u00ean ph\u00e2n v\u00f9ng \u1ed5 \u0111\u0129a v\u00e0 \u0111o th\u1eddi gian ph\u1ea3n h\u1ed3i c\u1ee7a h\u1ec7 th\u1ed1ng l\u01b0u tr\u1eef.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Ioping-Latency-la-gi\"><\/span>Ioping Latency l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>Ioping Latency<\/strong>\u00a0(hay \u0111\u1ed9 tr\u1ec5 Ioping) ch\u00ednh l\u00e0 kho\u1ea3ng th\u1eddi gian t\u00ednh t\u1eeb th\u1eddi \u0111i\u1ec3m c\u00f4ng c\u1ee5 Ioping g\u1eedi m\u1ed9t y\u00eau c\u1ea7u truy xu\u1ea5t d\u1eef li\u1ec7u (\u0111\u1ecdc ho\u1eb7c ghi m\u1ed9t block d\u1eef li\u1ec7u) cho \u0111\u1ebfn khi nh\u1eadn \u0111\u01b0\u1ee3c ph\u1ea3n h\u1ed3i ho\u00e0n t\u1ea5t t\u1eeb thi\u1ebft b\u1ecb l\u01b0u tr\u1eef.<\/p>\n<p>Ch\u1ec9 s\u1ed1 n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c \u0111o b\u1eb1ng c\u00e1c \u0111\u01a1n v\u1ecb th\u1eddi gian c\u1ef1c k\u1ef3 nh\u1ecf:<\/p>\n<ul>\n<li><strong>Second (s):<\/strong>\u00a0Gi\u00e2y (th\u01b0\u1eddng d\u00f9ng cho c\u00e1c \u1ed5 \u0111\u0129a c\u01a1 th\u1ebf h\u1ec7 c\u0169 ho\u1eb7c h\u1ec7 th\u1ed1ng g\u1eb7p ngh\u1ebdn I\/O nghi\u00eam tr\u1ecdng).<\/li>\n<li><strong>Millisecond (ms):<\/strong>\u00a0Ph\u1ea7n ngh\u00ecn gi\u00e2y (1 ms = 0,001 s) \u2013 \u0111\u01a1n v\u1ecb ph\u1ed5 bi\u1ebfn nh\u1ea5t khi \u0111o l\u01b0\u1eddng \u0111\u1ed9 tr\u1ec5 l\u01b0u tr\u1eef.<\/li>\n<li><strong>Microsecond (\u00b5s):<\/strong>\u00a0Ph\u1ea7n tri\u1ec7u gi\u00e2y (1 \u00b5s = 0,001 ms = 0,000001 s) \u2013 \u0111\u01a1n v\u1ecb th\u01b0\u1eddng g\u1eb7p \u1edf c\u00e1c thi\u1ebft b\u1ecb l\u01b0u tr\u1eef t\u1ed1c \u0111\u1ed9 cao nh\u01b0 NVMe SSD.<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-41543\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/06\/Ioping-latency-la-gi-y-nghia-cach-do-va-tam-quan-trong.jpg\" alt=\"Ioping latency l\u00e0 g\u00ec, \u00fd ngh\u0129a, c\u00e1ch \u0111o v\u00e0 t\u1ea7m quan tr\u1ecdng\" width=\"1000\" height=\"667\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/06\/Ioping-latency-la-gi-y-nghia-cach-do-va-tam-quan-trong.jpg 1000w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/06\/Ioping-latency-la-gi-y-nghia-cach-do-va-tam-quan-trong-300x200.jpg 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/06\/Ioping-latency-la-gi-y-nghia-cach-do-va-tam-quan-trong-768x512.jpg 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Vi-du-thuc-te-de-de-hinh-dung\"><\/span>V\u00ed d\u1ee5 th\u1ef1c t\u1ebf \u0111\u1ec3 d\u1ec5 h\u00ecnh dung<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0110\u1ec3 hi\u1ec3u r\u00f5 h\u01a1n v\u1ec1 \u0111\u1ed9 tr\u1ec5 c\u1ee7a c\u00e1c lo\u1ea1i \u1ed5 c\u1ee9ng, ch\u00fang ta c\u00f3 th\u1ec3 li\u00ean t\u01b0\u1edfng \u0111\u1ebfn vi\u1ec7c t\u00ecm ki\u1ebfm th\u00f4ng tin trong th\u1ef1c t\u1ebf:<\/p>\n<ul>\n<li><strong>HDD (\u1ed4 c\u1ee9ng c\u01a1):<\/strong>\u00a0Gi\u1ed1ng nh\u01b0 vi\u1ec7c b\u1ea1n ph\u1ea3i \u0111i b\u1ed9 v\u00e0o m\u1ed9t th\u01b0 vi\u1ec7n l\u1edbn, t\u00ecm \u0111\u00fang k\u1ec7 s\u00e1ch, l\u1eadt t\u1eebng trang \u0111\u1ec3 t\u00ecm th\u00f4ng tin. Vi\u1ec7c di chuy\u1ec3n v\u1eadt l\u00fd c\u1ee7a kim \u0111\u1ecdc v\u00e0 \u0111\u0129a quay khi\u1ebfn qu\u00e1 tr\u00ecnh n\u00e0y m\u1ea5t r\u1ea5t nhi\u1ec1u th\u1eddi gian.<\/li>\n<li><strong>SATA SSD:<\/strong>\u00a0Gi\u1ed1ng nh\u01b0 m\u1ed9t ng\u0103n t\u1ee7 t\u00e0i li\u1ec7u \u0111\u01b0\u1ee3c s\u1eafp x\u1ebfp khoa h\u1ecdc ngay c\u1ea1nh b\u00e0n l\u00e0m vi\u1ec7c. B\u1ea1n ch\u1ec9 c\u1ea7n m\u1edf ng\u0103n k\u00e9o ra l\u00e0 th\u1ea5y ngay, kh\u00f4ng t\u1ed1n c\u00f4ng di chuy\u1ec3n v\u1eadt l\u00fd.<\/li>\n<li><strong>NVMe SSD:<\/strong>\u00a0Gi\u1ed1ng nh\u01b0 t\u00e0i li\u1ec7u \u0111\u00e3 \u0111\u01b0\u1ee3c \u0111\u1eb7t s\u1eb5n ngay tr\u00ean b\u00e0n l\u00e0m vi\u1ec7c c\u1ee7a b\u1ea1n. Ch\u1ec9 c\u1ea7n li\u1ebfc m\u1eaft qua l\u00e0 b\u1ea1n \u0111\u00e3 c\u00f3 ngay th\u00f4ng tin mong mu\u1ed1n v\u1edbi t\u1ed1c \u0111\u1ed9 g\u1ea7n nh\u01b0 t\u1ee9c th\u1eddi.<\/li>\n<\/ul>\n<hr \/>\n<h2><span class=\"ez-toc-section\" id=\"Ioping-Hoat-Dong-Nhu-The-Nao\"><\/span>Ioping Ho\u1ea1t \u0110\u1ed9ng Nh\u01b0 Th\u1ebf N\u00e0o?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"Nguyen-ly-do-do-tre-cua-Ioping\"><\/span>Nguy\u00ean l\u00fd \u0111o \u0111\u1ed9 tr\u1ec5 c\u1ee7a Ioping<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Ioping ho\u1ea1t \u0111\u1ed9ng d\u1ef1a tr\u00ean m\u1ed9t nguy\u00ean l\u00fd t\u01b0\u01a1ng \u0111\u1ed1i \u0111\u01a1n gi\u1ea3n nh\u01b0ng mang l\u1ea1i \u0111\u1ed9 ch\u00ednh x\u00e1c cao:<\/p>\n<ol>\n<li>C\u00f4ng c\u1ee5 n\u00e0y s\u1ebd t\u1ea1o ra c\u00e1c y\u00eau c\u1ea7u I\/O (th\u01b0\u1eddng l\u00e0 c\u00e1c y\u00eau c\u1ea7u \u0111\u1ecdc ng\u1eabu nhi\u00ean v\u1edbi k\u00edch th\u01b0\u1edbc block r\u1ea5t nh\u1ecf, m\u1eb7c \u0111\u1ecbnh l\u00e0 4 KiB).<\/li>\n<li>N\u00f3 g\u1eedi y\u00eau c\u1ea7u n\u00e0y \u0111\u1ebfn h\u1ec7 th\u1ed1ng t\u1ec7p ho\u1eb7c thi\u1ebft b\u1ecb l\u01b0u tr\u1eef \u0111\u00edch.<\/li>\n<li>\u0110\u1ed3ng h\u1ed3 c\u1ee7a h\u1ec7 th\u1ed1ng s\u1ebd ghi nh\u1eadn ch\u00ednh x\u00e1c th\u1eddi gian b\u1eaft \u0111\u1ea7u g\u1eedi v\u00e0 th\u1eddi gian nh\u1eadn \u0111\u01b0\u1ee3c ph\u1ea3n h\u1ed3i ho\u00e0n th\u00e0nh.<\/li>\n<li>Qu\u00e1 tr\u00ecnh n\u00e0y \u0111\u01b0\u1ee3c l\u1eb7p l\u1ea1i li\u00ean t\u1ee5c nhi\u1ec1u l\u1ea7n (t\u01b0\u01a1ng t\u1ef1 nh\u01b0 ping m\u1ea1ng) \u0111\u1ec3 t\u00ednh to\u00e1n ra c\u00e1c gi\u00e1 tr\u1ecb trung b\u00ecnh, c\u1ef1c ti\u1ec3u, c\u1ef1c \u0111\u1ea1i v\u00e0 \u0111\u1ed9 l\u1ec7ch chu\u1ea9n.<\/li>\n<\/ol>\n<h3><span class=\"ez-toc-section\" id=\"Cac-loai-phep-do-pho-bien-cua-Ioping\"><\/span>C\u00e1c lo\u1ea1i ph\u00e9p \u0111o ph\u1ed5 bi\u1ebfn c\u1ee7a Ioping<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>T\u00f9y v\u00e0o <a href=\"https:\/\/interdata.vn\/blog\/tham-so-parameter-la-gi\/\">tham s\u1ed1<\/a> c\u1ea5u h\u00ecnh khi ch\u1ea1y l\u1ec7nh, Ioping c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n nhi\u1ec1u ki\u1ec3u \u0111o kh\u00e1c nhau \u0111\u1ec3 ph\u1ea3n \u00e1nh c\u00e1c kh\u00eda c\u1ea1nh hi\u1ec7u n\u0103ng c\u1ee7a \u1ed5 c\u1ee9ng:<\/p>\n<h4>Cached I\/O<\/h4>\n<p>Ph\u00e9p \u0111o n\u00e0y truy c\u1eadp v\u00e0o d\u1eef li\u1ec7u \u0111\u00e3 \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef s\u1eb5n tr\u00ean b\u1ed9 nh\u1edb \u0111\u1ec7m (RAM <a href=\"https:\/\/interdata.vn\/blog\/cache-la-gi\/\">Cache<\/a>) c\u1ee7a <a href=\"https:\/\/interdata.vn\/blog\/he-dieu-hanh\/\">h\u1ec7 \u0111i\u1ec1u h\u00e0nh<\/a> thay v\u00ec truy c\u1eadp tr\u1ef1c ti\u1ebfp v\u00e0o \u0111\u0129a v\u1eadt l\u00fd. K\u1ebft qu\u1ea3 tr\u1ea3 v\u1ec1 s\u1ebd c\u00f3 \u0111\u1ed9 tr\u1ec5 c\u1ef1c k\u1ef3 th\u1ea5p (th\u01b0\u1eddng t\u00ednh b\u1eb1ng microsecond ho\u1eb7c nanosecond), gi\u00fap \u0111\u00e1nh gi\u00e1 t\u1ed1c \u0111\u1ed9 c\u1ee7a b\u1ed9 nh\u1edb \u0111\u1ec7m h\u1ec7 th\u1ed1ng.<\/p>\n<h4>Direct I\/O<\/h4>\n<p>\u0110\u00e2y l\u00e0 ph\u00e9p \u0111o b\u1ecf qua ho\u00e0n to\u00e0n b\u1ed9 nh\u1edb \u0111\u1ec7m c\u1ee7a h\u1ec7 \u0111i\u1ec1u h\u00e0nh (<code>Page Cache<\/code>), b\u1eaft bu\u1ed9c c\u00e1c y\u00eau c\u1ea7u \u0111\u1ecdc\/ghi ph\u1ea3i \u0111i th\u1eb3ng xu\u1ed1ng ph\u1ea7n c\u1ee9ng c\u1ee7a thi\u1ebft b\u1ecb l\u01b0u tr\u1eef. \u0110\u00e2y l\u00e0 ch\u1ec9 s\u1ed1 ph\u1ea3n \u00e1nh ch\u00ednh x\u00e1c nh\u1ea5t hi\u1ec7u n\u0103ng th\u1ef1c t\u1ebf c\u1ee7a \u1ed5 c\u1ee9ng v\u1eadt l\u00fd ho\u1eb7c ph\u00e2n v\u00f9ng <a href=\"https:\/\/interdata.vn\/blog\/vps-la-gi\/\">VPS<\/a> m\u00e0 b\u1ea1n \u0111ang s\u1eed d\u1ee5ng.<\/p>\n<h4>Random Access<\/h4>\n<p>Ioping th\u1ef1c hi\u1ec7n \u0111\u1ecdc\/ghi ng\u1eabu nhi\u00ean tr\u00ean c\u00e1c v\u00f9ng d\u1eef li\u1ec7u kh\u00e1c nhau c\u1ee7a \u1ed5 \u0111\u0129a. Ph\u00e9p \u0111o n\u00e0y c\u1ef1c k\u1ef3 quan tr\u1ecdng v\u00ec h\u1ea7u h\u1ebft c\u00e1c t\u00e1c v\u1ee5 th\u1ef1c t\u1ebf c\u1ee7a h\u1ec7 \u0111i\u1ec1u h\u00e0nh, database \u0111\u1ec1u l\u00e0 truy xu\u1ea5t ng\u1eabu nhi\u00ean.<\/p>\n<h4>Sequential Access<\/h4>\n<p>Ioping th\u1ef1c hi\u1ec7n \u0111\u1ecdc\/ghi d\u1eef li\u1ec7u li\u00ean t\u1ee5c tr\u00ean c\u00e1c block x\u1ebfp li\u1ec1n k\u1ec1 nhau. Ph\u00e9p \u0111o n\u00e0y th\u01b0\u1eddng cho k\u1ebft qu\u1ea3 \u0111\u1ed9 tr\u1ec5 th\u1ea5p h\u01a1n v\u00e0 t\u1ed1c \u0111\u1ed9 truy\u1ec1n t\u1ea3i cao h\u01a1n, th\u01b0\u1eddng th\u1ea5y khi b\u1ea1n copy m\u1ed9t file dung l\u01b0\u1ee3ng l\u1edbn.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Cac-chi-so-thuong-xuat-hien-trong-ket-qua-Ioping\"><\/span>C\u00e1c ch\u1ec9 s\u1ed1 th\u01b0\u1eddng xu\u1ea5t hi\u1ec7n trong k\u1ebft qu\u1ea3 Ioping<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Khi ch\u1ea1y l\u1ec7nh Ioping, b\u1ea1n s\u1ebd nh\u1eadn \u0111\u01b0\u1ee3c m\u1ed9t b\u1ea3ng k\u1ebft qu\u1ea3 g\u1ed3m c\u00e1c ch\u1ec9 s\u1ed1 quan tr\u1ecdng sau:<\/p>\n<ul>\n<li><strong>Min latency (\u0110\u1ed9 tr\u1ec5 t\u1ed1i thi\u1ec3u):<\/strong>\u00a0Th\u1eddi gian ph\u1ea3n h\u1ed3i nhanh nh\u1ea5t ghi nh\u1eadn \u0111\u01b0\u1ee3c trong su\u1ed1t qu\u00e1 tr\u00ecnh \u0111o.<\/li>\n<li><strong>Max latency (\u0110\u1ed9 tr\u1ec5 t\u1ed1i \u0111a):<\/strong>\u00a0Th\u1eddi gian ph\u1ea3n h\u1ed3i l\u00e2u nh\u1ea5t. Ch\u1ec9 s\u1ed1 n\u00e0y r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 ph\u00e1t hi\u1ec7n hi\u1ec7n t\u01b0\u1ee3ng ngh\u1ebdn c\u1ed5 chai c\u1ee5c b\u1ed9 (I\/O spikes).<\/li>\n<li><strong>Average latency (\u0110\u1ed9 tr\u1ec5 trung b\u00ecnh):<\/strong>\u00a0Gi\u00e1 tr\u1ecb trung b\u00ecnh c\u1ee7a to\u00e0n b\u1ed9 c\u00e1c l\u1ea7n th\u1eed, l\u00e0 th\u01b0\u1edbc \u0111o t\u1ed5ng qu\u00e1t nh\u1ea5t cho hi\u1ec7u n\u0103ng l\u01b0u tr\u1eef.<\/li>\n<li><strong>Percentile latency (\u0110\u1ed9 tr\u1ec5 theo ph\u00e2n v\u1ecb):<\/strong>\u00a0V\u00ed d\u1ee5 nh\u01b0 ph\u00e2n v\u1ecb 90% (90th percentile) ho\u1eb7c 99% (99th percentile), cho bi\u1ebft 99% s\u1ed1 y\u00eau c\u1ea7u \u0111\u01b0\u1ee3c ho\u00e0n th\u00e0nh trong kho\u1ea3ng th\u1eddi gian d\u01b0\u1edbi m\u1ee9c n\u00e0y.<\/li>\n<li><strong><a href=\"https:\/\/interdata.vn\/blog\/iops-la-gi\/\">IOPS<\/a> (Input\/Output Operations Per Second):<\/strong>\u00a0S\u1ed1 l\u01b0\u1ee3ng t\u00e1c v\u1ee5 \u0111\u1ecdc\/ghi \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n th\u00e0nh c\u00f4ng trong m\u1ed9t gi\u00e2y d\u01b0\u1edbi \u0111i\u1ec1u ki\u1ec7n ki\u1ec3m tra.<\/li>\n<li><strong>Throughput (B\u0103ng th\u00f4ng):<\/strong>\u00a0T\u1ed1c \u0111\u1ed9 truy\u1ec1n t\u1ea3i d\u1eef li\u1ec7u th\u1ef1c t\u1ebf (v\u00ed d\u1ee5: MB\/s) \u0111\u1ea1t \u0111\u01b0\u1ee3c trong qu\u00e1 tr\u00ecnh \u0111o.<\/li>\n<\/ul>\n<hr \/>\n<h2><span class=\"ez-toc-section\" id=\"Vi-Sao-Ioping-Latency-Quan-Trong\"><\/span>V\u00ec Sao Ioping Latency Quan Tr\u1ecdng?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"Latency-phan-anh-cam-nhan-thuc-te-cua-nguoi-dung\"><\/span>Latency ph\u1ea3n \u00e1nh c\u1ea3m nh\u1eadn th\u1ef1c t\u1ebf c\u1ee7a ng\u01b0\u1eddi d\u00f9ng<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Ng\u01b0\u1eddi d\u00f9ng cu\u1ed1i khi truy c\u1eadp v\u00e0o m\u1ed9t website th\u01b0\u1eddng kh\u00f4ng quan t\u00e2m \u1ed5 c\u1ee9ng c\u1ee7a b\u1ea1n c\u00f3 t\u1ed1c \u0111\u1ed9 \u0111\u1ecdc ghi tu\u1ea7n t\u1ef1 l\u00e0 bao nhi\u00eau MB\/s. H\u1ecd ch\u1ec9 quan t\u00e2m <a href=\"https:\/\/interdata.vn\/blog\/page-la-gi\/\">trang web<\/a> c\u00f3 t\u1ea3i ngay l\u1eadp t\u1ee9c hay kh\u00f4ng.<\/p>\n<p>\u0110\u1ed9 tr\u1ec5 (Latency) ch\u00ednh l\u00e0 y\u1ebfu t\u1ed1 quy\u1ebft \u0111\u1ecbnh c\u1ea3m nh\u1eadn n\u00e0y. \u0110\u1ed9 tr\u1ec5 l\u01b0u tr\u1eef th\u1ea5p gi\u00fap <a href=\"https:\/\/interdata.vn\/blog\/he-dieu-hanh-server\/\">h\u1ec7 \u0111i\u1ec1u h\u00e0nh m\u00e1y ch\u1ee7<\/a> ph\u1ea3n h\u1ed3i c\u00e1c y\u00eau c\u1ea7u t\u1eeb <a href=\"https:\/\/interdata.vn\/blog\/web-server\/\">web server<\/a> nhanh h\u01a1n, t\u1eeb \u0111\u00f3 r\u00fat ng\u1eafn th\u1eddi gian ph\u1ea3n h\u1ed3i trang (<a href=\"https:\/\/interdata.vn\/blog\/ttfb-la-gi\/\">TTFB<\/a> &#8211; Time to First Byte) v\u00e0 n\u00e2ng cao <a href=\"https:\/\/interdata.vn\/blog\/ux-la-gi\/\">tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng<\/a>.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Nhieu-truong-hop-latency-quan-trong-hon-toc-do-doc-ghi\"><\/span>Nhi\u1ec1u tr\u01b0\u1eddng h\u1ee3p latency quan tr\u1ecdng h\u01a1n t\u1ed1c \u0111\u1ed9 \u0111\u1ecdc ghi<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Trong th\u1ebf gi\u1edbi l\u01b0u tr\u1eef, nhi\u1ec1u ng\u01b0\u1eddi th\u01b0\u1eddng b\u1ecb thu h\u00fat b\u1edfi c\u00e1c con s\u1ed1 b\u0103ng th\u00f4ng &#8220;kh\u1ee7ng&#8221; nh\u01b0 t\u1ed1c \u0111\u1ed9 \u0111\u1ecdc ghi tu\u1ea7n t\u1ef1 5 GB\/s hay 7 GB\/s. Tuy nhi\u00ean, h\u00e3y xem x\u00e9t v\u00ed d\u1ee5 th\u1ef1c t\u1ebf sau:<\/p>\n<ul>\n<li><strong>Tr\u01b0\u1eddng h\u1ee3p A (SSD 5 GB\/s, Latency cao):<\/strong>\u00a0M\u1ed9t \u1ed5 c\u1ee9ng c\u00f3 b\u0103ng th\u00f4ng r\u1ea5t l\u1edbn nh\u01b0ng \u0111\u1ed9 tr\u1ec5 ph\u1ea3n h\u1ed3i l\u00ean t\u1edbi 5 ms.<\/li>\n<li><strong>Tr\u01b0\u1eddng h\u1ee3p B (SSD 2 GB\/s, Latency c\u1ef1c th\u1ea5p):<\/strong>\u00a0M\u1ed9t \u1ed5 c\u1ee9ng c\u00f3 b\u0103ng th\u00f4ng ch\u1ec9 b\u1eb1ng m\u1ed9t n\u1eeda nh\u01b0ng \u0111\u1ed9 tr\u1ec5 ph\u1ea3n h\u1ed3i c\u1ef1c th\u1ea5p, ch\u1ec9 kho\u1ea3ng 0.05 ms.<\/li>\n<\/ul>\n<p>Khi ch\u1ea1y c\u00e1c \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf nh\u01b0 c\u01a1 s\u1edf d\u1eef li\u1ec7u (<a href=\"https:\/\/interdata.vn\/blog\/mysql-la-gi\/\">MySQL<\/a>, <a href=\"https:\/\/interdata.vn\/blog\/postgresql-la-gi\/\">PostgreSQL<\/a>) \u2013 n\u01a1i h\u1ec7 th\u1ed1ng ph\u1ea3i th\u1ef1c hi\u1ec7n h\u00e0ng tri\u1ec7u truy v\u1ea5n \u0111\u1ecdc\/ghi c\u00e1c file d\u1eef li\u1ec7u nh\u1ecf l\u1ebb (k\u00edch th\u01b0\u1edbc ch\u1ec9 v\u00e0i KB) c\u00f9ng m\u1ed9t l\u00fac, \u1ed5 c\u1ee9ng \u1edf\u00a0<strong>Tr\u01b0\u1eddng h\u1ee3p B<\/strong>\u00a0s\u1ebd cho hi\u1ec7u n\u0103ng v\u01b0\u1ee3t tr\u1ed9i v\u00e0 t\u1ed1c \u0111\u1ed9 x\u1eed l\u00fd nhanh h\u01a1n g\u1ea5p nhi\u1ec1u l\u1ea7n so v\u1edbi\u00a0<strong>Tr\u01b0\u1eddng h\u1ee3p A<\/strong>.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Latency-anh-huong-truc-tiep-den-hieu-nang-ung-dung\"><\/span>Latency \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn hi\u1ec7u n\u0103ng \u1ee9ng d\u1ee5ng<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0110\u1ed9 tr\u1ec5 l\u01b0u tr\u1eef th\u1ea5p l\u00e0 &#8220;ch\u00eca kh\u00f3a&#8221; v\u1eadn h\u00e0nh m\u01b0\u1ee3t m\u00e0 cho c\u00e1c \u1ee9ng d\u1ee5ng v\u00e0 d\u1ecbch v\u1ee5 ph\u1ed5 bi\u1ebfn:<\/p>\n<ul>\n<li><strong><a href=\"https:\/\/interdata.vn\/blog\/wordpress-la-gi\/\">WordPress<\/a>, <a href=\"https:\/\/interdata.vn\/blog\/woocommerce-la-gi\/\">WooCommerce<\/a>, <a href=\"https:\/\/interdata.vn\/blog\/magento-la-gi\/\">Magento<\/a>:<\/strong>\u00a0C\u00e1c m\u00e3 ngu\u1ed3n n\u00e0y t\u1ea1o ra r\u1ea5t nhi\u1ec1u truy v\u1ea5n \u0111\u1ed3ng th\u1eddi t\u1edbi c\u01a1 s\u1edf d\u1eef li\u1ec7u v\u00e0 y\u00eau c\u1ea7u \u0111\u1ecdc file <a href=\"https:\/\/interdata.vn\/blog\/php-la-gi\/\">PHP<\/a> li\u00ean t\u1ee5c. \u0110\u1ed9 tr\u1ec5 th\u1ea5p gi\u00fap gi\u1ea3m thi\u1ec3u th\u1eddi gian ch\u1edd c\u1ee7a lu\u1ed3ng x\u1eed l\u00fd.<\/li>\n<li><strong>MySQL, PostgreSQL:<\/strong>\u00a0C\u01a1 s\u1edf d\u1eef li\u1ec7u th\u01b0\u1eddng ghi d\u1eef li\u1ec7u v\u00e0o log v\u00e0 b\u1ea3ng m\u1ed9t c\u00e1ch li\u00ean t\u1ee5c. Latency th\u1ea5p gi\u00fap c\u00e1c l\u1ec7nh\u00a0<code>COMMIT<\/code>\u00a0ho\u00e0n th\u00e0nh g\u1ea7n nh\u01b0 ngay l\u1eadp t\u1ee9c, tr\u00e1nh hi\u1ec7n t\u01b0\u1ee3ng kh\u00f3a b\u1ea3ng (table locking) ho\u1eb7c ngh\u1ebdn h\u00e0ng \u0111\u1ee3i truy v\u1ea5n.<\/li>\n<li><strong><a href=\"https:\/\/interdata.vn\/blog\/redis-la-gi\/\">Redis<\/a>, Elasticsearch:<\/strong>\u00a0C\u00e1c h\u1ec7 th\u1ed1ng l\u01b0u tr\u1eef d\u1ea1ng key-value v\u00e0 t\u00ecm ki\u1ebfm y\u00eau c\u1ea7u truy xu\u1ea5t t\u1ed1c \u0111\u1ed9 cao. D\u00f9 \u0111\u00e3 t\u1ed1i \u01b0u tr\u00ean RAM, nh\u01b0ng khi c\u1ea7n \u0111\u1ed3ng b\u1ed9 d\u1eef li\u1ec7u xu\u1ed1ng \u0111\u0129a (persistence), \u0111\u1ed9 tr\u1ec5 th\u1ea5p c\u1ee7a \u1ed5 c\u1ee9ng v\u1eabn \u0111\u00f3ng vai tr\u00f2 quy\u1ebft \u0111\u1ecbnh \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh.<\/li>\n<\/ul>\n<hr \/>\n<h2><span class=\"ez-toc-section\" id=\"Moi-Quan-He-Giua-Ioping-Latency-Va-IOPS\"><\/span>M\u1ed1i Quan H\u1ec7 Gi\u1eefa Ioping Latency V\u00e0 IOPS<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"IOPS-la-gi\"><\/span>IOPS l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>IOPS<\/strong>\u00a0(Input\/Output Operations Per Second) l\u00e0 s\u1ed1 l\u01b0\u1ee3ng thao t\u00e1c \u0111\u1ecdc ho\u1eb7c ghi d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c thi\u1ebft b\u1ecb l\u01b0u tr\u1eef th\u1ef1c hi\u1ec7n th\u00e0nh c\u00f4ng trong m\u1ed9t gi\u00e2y. \u0110\u00e2y l\u00e0 ch\u1ec9 s\u1ed1 \u0111\u1ea1i di\u1ec7n cho &#8220;s\u1ee9c ch\u1ee9a&#8221; ho\u1eb7c n\u0103ng su\u1ea5t l\u00e0m vi\u1ec7c c\u1ee7a \u1ed5 \u0111\u0129a.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Latency-la-gi\"><\/span>Latency l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>Latency<\/strong>\u00a0(nh\u01b0 \u0111\u00e3 \u0111\u1ecbnh ngh\u0129a) l\u00e0 kho\u1ea3ng th\u1eddi gian c\u1ea7n thi\u1ebft \u0111\u1ec3 ho\u00e0n th\u00e0nh m\u1ed9t thao t\u00e1c I\/O duy nh\u1ea5t. N\u00f3 \u0111\u1ea1i di\u1ec7n cho &#8220;t\u1ed1c \u0111\u1ed9 ph\u1ea3n \u1ee9ng&#8221; c\u1ee7a \u1ed5 \u0111\u0129a.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Cong-thuc-lien-he-giua-IOPS-va-Latency\"><\/span>C\u00f4ng th\u1ee9c li\u00ean h\u1ec7 gi\u1eefa IOPS v\u00e0 Latency<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Trong \u0111i\u1ec1u ki\u1ec7n l\u00fd t\u01b0\u1edfng (kh\u00f4ng c\u00f3 h\u00e0ng \u0111\u1ee3i &#8211; <a href=\"https:\/\/interdata.vn\/blog\/queue-la-gi\/\">Queue<\/a> Depth = 1), m\u1ed1i quan h\u1ec7 gi\u1eefa IOPS v\u00e0 Latency \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n qua c\u00f4ng th\u1ee9c \u0111\u01a1n gi\u1ea3n:<\/p>\n<p>$$\\text{IOPS} = \\frac{1}{\\text{Latency (t\u00ednh b\u1eb1ng gi\u00e2y)}}$$<\/p>\n<p>V\u00ed d\u1ee5:<\/p>\n<ul>\n<li>N\u1ebfu \u0111\u1ed9 tr\u1ec5 trung b\u00ecnh \u0111\u1ec3 ho\u00e0n th\u00e0nh 1 t\u00e1c v\u1ee5 l\u00e0 $1\\text{ ms}$ ($0.001\\text{ s}$), th\u00ec trong 1 gi\u00e2y, h\u1ec7 th\u1ed1ng c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n t\u1ed1i \u0111a: $1 \/ 0.001 = 1000\\text{ IOPS}$.<\/li>\n<li>N\u1ebfu \u0111\u1ed9 tr\u1ec5 gi\u1ea3m xu\u1ed1ng c\u00f2n $0.1\\text{ ms}$ ($0.0001\\text{ s}$), s\u1ed1 IOPS l\u00fd thuy\u1ebft s\u1ebd t\u0103ng l\u00ean: $1 \/ 0.0001 = 10000\\text{ IOPS}$.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Vi-sao-IOPS-cao-chua-chac-VPS-nhanh\"><\/span>V\u00ec sao IOPS cao ch\u01b0a ch\u1eafc VPS nhanh?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Khi thu\u00ea VPS ho\u1eb7c <a href=\"https:\/\/interdata.vn\/blog\/cloud-server-may-chu-dam-may\/\">Cloud Server<\/a>, c\u00e1c nh\u00e0 cung c\u1ea5p th\u01b0\u1eddng qu\u1ea3ng c\u00e1o nh\u1eefng con s\u1ed1 IOPS r\u1ea5t cao (v\u00ed d\u1ee5: 50,000 IOPS hay 100,000 IOPS). Tuy nhi\u00ean, tr\u00ean th\u1ef1c t\u1ebf m\u00e1y ch\u1ee7 c\u1ee7a b\u1ea1n v\u1eabn c\u00f3 th\u1ec3 b\u1ecb ch\u1eadm do c\u00e1c l\u00fd do sau:<\/p>\n<ul>\n<li><strong>Queue Depth l\u1edbn:<\/strong>\u00a0\u0110\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c s\u1ed1 IOPS c\u1ef1c \u0111\u1ea1i \u0111\u00f3, nh\u00e0 cung c\u1ea5p th\u01b0\u1eddng \u0111o \u1edf m\u1ee9c h\u00e0ng \u0111\u1ee3i r\u1ea5t cao (Queue Depth = 32 ho\u1eb7c 64). \u0110i\u1ec1u n\u00e0y ngh\u0129a l\u00e0 h\u1ec7 th\u1ed1ng ph\u1ea3i x\u1ebfp h\u00e0ng r\u1ea5t nhi\u1ec1u y\u00eau c\u1ea7u \u0111\u1ec3 x\u1eed l\u00fd c\u00f9ng l\u00fac, v\u00f4 t\u00ecnh \u0111\u1ea9y \u0111\u1ed9 tr\u1ec5 (latency) c\u1ee7a t\u1eebng y\u00eau c\u1ea7u c\u00e1 nh\u00e2n l\u00ean r\u1ea5t cao.<\/li>\n<li><strong>Burst Benchmark:<\/strong>\u00a0M\u1ed9t s\u1ed1 h\u1ec7 th\u1ed1ng cho ph\u00e9p &#8220;b\u1ee9t t\u1ed1c&#8221; (burst) hi\u1ec7u n\u0103ng trong v\u00e0i gi\u00e2y \u0111\u1ea7u ti\u00ean, sau \u0111\u00f3 s\u1ebd b\u1ecb gi\u1edbi h\u1ea1n (throttle) l\u1ea1i khi ch\u1ea1y t\u00e1c v\u1ee5 n\u1eb7ng k\u00e9o d\u00e0i.<\/li>\n<li><strong>Cache Benchmark:<\/strong>\u00a0K\u1ebft qu\u1ea3 IOPS cao c\u00f3 th\u1ec3 do c\u00f4ng c\u1ee5 ki\u1ec3m tra \u0111ang \u0111o tr\u00ean b\u1ed9 nh\u1edb \u0111\u1ec7m RAM ho\u1eb7c b\u1ed9 \u0111\u1ec7m c\u1ee7a SSD (SLC Cache), kh\u00f4ng ph\u1ea3n \u00e1nh \u0111\u00fang t\u1ed1c \u0111\u1ed9 c\u1ee7a chip nh\u1edb th\u1ef1c t\u1ebf khi \u1ed5 c\u1ee9ng b\u1ecb \u0111\u1ea7y d\u1eef li\u1ec7u.<\/li>\n<li><strong>Workload kh\u00f4ng th\u1ef1c t\u1ebf:<\/strong>\u00a0Benchmark s\u1eed d\u1ee5ng c\u00e1c block d\u1eef li\u1ec7u tu\u1ea7n t\u1ef1 l\u1edbn \u0111\u1ec3 \u0111\u1ea9y s\u1ed1 IOPS l\u00ean \u0111\u1eb9p, trong khi \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf c\u1ee7a b\u1ea1n l\u1ea1i ch\u1ea1y c\u00e1c truy v\u1ea5n ng\u1eabu nhi\u00ean nh\u1ecf.<\/li>\n<\/ul>\n<hr \/>\n<h2><span class=\"ez-toc-section\" id=\"So-Sanh-Ioping-Latency-IOPS-Throughput-Va-Response-Time\"><\/span>So S\u00e1nh Ioping Latency, IOPS, Throughput V\u00e0 Response Time<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0110\u1ec3 c\u00f3 c\u00e1i nh\u00ecn to\u00e0n di\u1ec7n khi \u0111\u00e1nh gi\u00e1 hi\u1ec7u n\u0103ng l\u01b0u tr\u1eef, ch\u00fang ta c\u1ea7n ph\u00e2n bi\u1ec7t r\u00f5 b\u1ed1n kh\u00e1i ni\u1ec7m c\u1ed1t l\u00f5i n\u00e0y:<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Ioping-Latency\"><\/span>Ioping Latency<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>L\u00e0 \u0111\u1ed9 tr\u1ec5 ph\u1ea3n h\u1ed3i c\u1ee7a thi\u1ebft b\u1ecb ph\u1ea7n c\u1ee9ng khi x\u1eed l\u00fd m\u1ed9t y\u00eau c\u1ea7u I\/O \u0111\u01a1n l\u1ebb. \u0110o l\u01b0\u1eddng kh\u1ea3 n\u0103ng ph\u1ea3n \u1ee9ng nhanh nh\u1ea1y c\u1ee7a \u1ed5 \u0111\u0129a.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"IOPS\"><\/span>IOPS<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>L\u00e0 t\u1ed5ng s\u1ed1 l\u01b0\u1ee3ng thao t\u00e1c I\/O m\u00e0 h\u1ec7 th\u1ed1ng l\u01b0u tr\u1eef c\u00f3 th\u1ec3 x\u1eed l\u00fd trong m\u1ed9t gi\u00e2y. \u0110o l\u01b0\u1eddng kh\u1ea3 n\u0103ng ch\u1ecbu t\u1ea3i v\u00e0 m\u1eadt \u0111\u1ed9 x\u1eed l\u00fd t\u00e1c v\u1ee5.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Throughput-Bang-thongToc-do-truyen-tai\"><\/span>Throughput (B\u0103ng th\u00f4ng\/T\u1ed1c \u0111\u1ed9 truy\u1ec1n t\u1ea3i)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>L\u00e0 l\u01b0\u1ee3ng d\u1eef li\u1ec7u th\u1ef1c t\u1ebf \u0111\u01b0\u1ee3c truy\u1ec1n t\u1ea3i \u0111i trong m\u1ed9t \u0111\u01a1n v\u1ecb th\u1eddi gian (v\u00ed d\u1ee5: MB\/s, GB\/s). N\u00f3 ph\u1ee5 thu\u1ed9c v\u00e0o c\u1ea3 IOPS l\u1eabn k\u00edch th\u01b0\u1edbc c\u1ee7a block d\u1eef li\u1ec7u ($\\text{Throughput} = \\text{IOPS} \\times \\text{Block Size}$).<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Response-Time-Thoi-gian-phan-hoi\"><\/span>Response Time (Th\u1eddi gian ph\u1ea3n h\u1ed3i)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>L\u00e0 t\u1ed5ng th\u1eddi gian t\u1eeb l\u00fac \u1ee9ng d\u1ee5ng g\u1eedi y\u00eau c\u1ea7u, \u0111i qua h\u1ec7 \u0111i\u1ec1u h\u00e0nh, qua h\u00e0ng \u0111\u1ee3i (queue), xu\u1ed1ng \u1ed5 \u0111\u0129a x\u1eed l\u00fd, r\u1ed3i tr\u1ea3 k\u1ebft qu\u1ea3 ng\u01b0\u1ee3c l\u1ea1i cho \u1ee9ng d\u1ee5ng. <a href=\"https:\/\/interdata.vn\/blog\/http-response-la-gi\/\">Response<\/a> Time bao g\u1ed3m c\u1ea3 Latency ph\u1ea7n c\u1ee9ng l\u1eabn th\u1eddi gian ch\u1edd trong h\u00e0ng \u0111\u1ee3i h\u1ec7 th\u1ed1ng.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Bang-so-sanh-tong-quan\"><\/span>B\u1ea3ng so s\u00e1nh t\u1ed5ng quan<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<table>\n<thead>\n<tr>\n<th align=\"left\">Ch\u1ec9 s\u1ed1<\/th>\n<th align=\"left\">\u0110o l\u01b0\u1eddng<\/th>\n<th align=\"left\">\u0110\u01a1n v\u1ecb ph\u1ed5 bi\u1ebfn<\/th>\n<th align=\"left\">\u00dd ngh\u0129a th\u1ef1c t\u1ebf<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td align=\"left\"><strong>Ioping Latency<\/strong><\/td>\n<td align=\"left\">\u0110\u1ed9 tr\u1ec5 ph\u1ea3n h\u1ed3i ph\u1ea7n c\u1ee9ng<\/td>\n<td align=\"left\">ms, $\\mu$s<\/td>\n<td align=\"left\">Kh\u1ea3 n\u0103ng ph\u1ea3n \u1ee9ng t\u1ee9c th\u1eddi c\u1ee7a \u1ed5 c\u1ee9ng khi c\u00f3 y\u00eau c\u1ea7u.<\/td>\n<\/tr>\n<tr>\n<td align=\"left\"><strong>IOPS<\/strong><\/td>\n<td align=\"left\">S\u1ed1 l\u01b0\u1ee3ng thao t\u00e1c x\u1eed l\u00fd<\/td>\n<td align=\"left\">ops\/s (ho\u1eb7c IOPS)<\/td>\n<td align=\"left\">Kh\u1ea3 n\u0103ng gi\u1ea3i quy\u1ebft nhi\u1ec1u t\u00e1c v\u1ee5 \u0111\u1ecdc\/ghi c\u00f9ng l\u00fac.<\/td>\n<\/tr>\n<tr>\n<td align=\"left\"><strong>Throughput<\/strong><\/td>\n<td align=\"left\">B\u0103ng th\u00f4ng l\u01b0u tr\u1eef<\/td>\n<td align=\"left\">MB\/s, GB\/s<\/td>\n<td align=\"left\">T\u1ed1c \u0111\u1ed9 khi copy file, backup d\u1eef li\u1ec7u dung l\u01b0\u1ee3ng l\u1edbn.<\/td>\n<\/tr>\n<tr>\n<td align=\"left\"><strong>Response Time<\/strong><\/td>\n<td align=\"left\">T\u1ed5ng th\u1eddi gian ph\u1ea3n h\u1ed3i<\/td>\n<td align=\"left\">ms<\/td>\n<td align=\"left\">Tr\u1ea3i nghi\u1ec7m th\u1ef1c t\u1ebf c\u1ee7a \u1ee9ng d\u1ee5ng (g\u1ed3m c\u1ea3 th\u1eddi gian ch\u1edd x\u1ebfp h\u00e0ng).<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n<h2><span class=\"ez-toc-section\" id=\"Chi-So-Ioping-Latency-Bao-Nhieu-La-Tot\"><\/span>Ch\u1ec9 S\u1ed1 Ioping Latency Bao Nhi\u00eau L\u00e0 T\u1ed1t?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>T\u00f9y thu\u1ed9c v\u00e0o c\u00f4ng ngh\u1ec7 l\u01b0u tr\u1eef v\u00e0 m\u00f4i tr\u01b0\u1eddng h\u1ea1 t\u1ea7ng, m\u1ee9c \u0111\u1ed9 tr\u1ec5 \u0111\u01b0\u1ee3c coi l\u00e0 &#8220;t\u1ed1t&#8221; s\u1ebd c\u00f3 s\u1ef1 kh\u00e1c bi\u1ec7t r\u1ea5t l\u1edbn. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 c\u00e1c m\u1ed1c tham kh\u1ea3o th\u1ef1c t\u1ebf:<\/p>\n<h3><span class=\"ez-toc-section\" id=\"HDD-truyen-thong\"><\/span>HDD truy\u1ec1n th\u1ed1ng<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0110\u1ed9 tr\u1ec5 trung b\u00ecnh th\u01b0\u1eddng dao \u0111\u1ed9ng t\u1eeb\u00a0<strong>5 ms \u0111\u1ebfn 20 ms<\/strong>. \u0110\u1ed1i v\u1edbi c\u00e1c t\u00e1c v\u1ee5 \u0111\u1ecdc ghi ng\u1eabu nhi\u00ean, con s\u1ed1 n\u00e0y c\u00f3 th\u1ec3 v\u1ecdt l\u00ean tr\u00ean\u00a0<strong>50 ms<\/strong>, khi\u1ebfn h\u1ec7 th\u1ed1ng ch\u1ea1y r\u1ea5t ch\u1eadm n\u1ebfu c\u00f3 nhi\u1ec1u t\u00e1c v\u1ee5 \u0111\u1ed3ng th\u1eddi.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"SATA-SSD\"><\/span>SATA SSD<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0110\u1ed9 tr\u1ec5 trung b\u00ecnh n\u1eb1m trong kho\u1ea3ng\u00a0<strong>0.1 ms \u0111\u1ebfn 1 ms<\/strong>\u00a0(t\u01b0\u01a1ng \u0111\u01b0\u01a1ng 100 $\\mu$s \u0111\u1ebfn 1000 $\\mu$s). \u0110\u00e2y l\u00e0 m\u1ee9c c\u1ea3i ti\u1ebfn v\u01b0\u1ee3t b\u1eadc so v\u1edbi HDD, \u0111\u1ee7 \u0111\u00e1p \u1ee9ng t\u1ed1t cho c\u00e1c website v\u1eeba v\u00e0 nh\u1ecf.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"NVMe-SSD-Consumer-Dong-pho-thong\"><\/span>NVMe SSD Consumer (D\u00f2ng ph\u1ed5 th\u00f4ng)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0110\u1ed9 tr\u1ec5 c\u1ef1c th\u1ea5p, th\u01b0\u1eddng dao \u0111\u1ed9ng t\u1eeb\u00a0<strong>0.02 ms \u0111\u1ebfn 0.2 ms<\/strong>\u00a0(20 $\\mu$s \u0111\u1ebfn 200 $\\mu$s) nh\u1edd k\u1ebft n\u1ed1i tr\u1ef1c ti\u1ebfp qua l\u00e0n PCIe v\u00e0 giao th\u1ee9c NVMe t\u1ed1i \u01b0u.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Enterprise-NVMe-SSD-Dong-chuyen-dung-cho-doanh-nghiep\"><\/span>Enterprise NVMe SSD (D\u00f2ng chuy\u00ean d\u1ee5ng cho doanh nghi\u1ec7p)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Th\u01b0\u1eddng \u0111\u1ea1t m\u1ee9c\u00a0<strong>d\u01b0\u1edbi 0.05 ms<\/strong>\u00a0(d\u01b0\u1edbi 50 $\\mu$s), th\u1eadm ch\u00ed c\u00f3 nh\u1eefng d\u00f2ng cao c\u1ea5p \u0111\u1ea1t d\u01b0\u1edbi\u00a0<strong>20 $\\mu$s<\/strong>. \u0110\u1eb7c \u0111i\u1ec3m c\u1ee7a d\u00f2ng n\u00e0y l\u00e0 \u0111\u1ed9 tr\u1ec5 c\u1ef1c k\u1ef3 \u1ed5n \u0111\u1ecbnh ngay c\u1ea3 khi h\u1ec7 th\u1ed1ng ch\u1ecbu t\u1ea3i n\u1eb7ng li\u00ean t\u1ee5c 24\/7.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"VPS-su-dung-NVMe-SSD\"><\/span>VPS s\u1eed d\u1ee5ng NVMe SSD<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Tr\u00ean m\u00f4i tr\u01b0\u1eddng <a href=\"https:\/\/interdata.vn\/blog\/ao-hoa-la-gi\/\">\u1ea3o h\u00f3a<\/a>, do ph\u1ea3i chia s\u1ebb t\u00e0i nguy\u00ean v\u00e0 \u0111i qua l\u1edbp \u1ea3o h\u00f3a, \u0111\u1ed9 tr\u1ec5 trung b\u00ecnh c\u1ee7a <a href=\"https:\/\/interdata.vn\/blog\/vps-nvme-la-gi\/\">VPS NVMe<\/a> t\u1ed1t th\u01b0\u1eddng n\u1eb1m trong kho\u1ea3ng\u00a0<strong>0.03 ms \u0111\u1ebfn 0.3 ms<\/strong>. \u0110\u00e2y l\u00e0 m\u1ee9c l\u00fd t\u01b0\u1edfng \u0111\u1ec3 v\u1eadn h\u00e0nh c\u00e1c h\u1ec7 th\u1ed1ng website v\u00e0 database ch\u1ea5t l\u01b0\u1ee3ng cao.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Cloud-Server\"><\/span>Cloud Server<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>T\u00f9y thu\u1ed9c v\u00e0o ki\u1ebfn tr\u00fac l\u01b0u tr\u1eef l\u00e0 Local Storage (\u1ed5 c\u1ee9ng g\u1eafn tr\u1ef1c ti\u1ebfp tr\u00ean node) hay Network Storage (l\u01b0u tr\u1eef t\u1eadp trung qua m\u1ea1ng SAN\/NAS). N\u1ebfu d\u00f9ng Network Storage, \u0111\u1ed9 tr\u1ec5 c\u00f3 th\u1ec3 dao \u0111\u1ed9ng l\u1edbn t\u1eeb\u00a0<strong>1 ms \u0111\u1ebfn 5 ms<\/strong>\u00a0do \u1ea3nh h\u01b0\u1edfng b\u1edfi \u0111\u01b0\u1eddng truy\u1ec1n m\u1ea1ng n\u1ed9i b\u1ed9.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Dedicated-Server-May-chu-vat-ly-dung-rieng\"><\/span>Dedicated Server (M\u00e1y ch\u1ee7 v\u1eadt l\u00fd d\u00f9ng ri\u00eang)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Do kh\u00f4ng b\u1ecb chia s\u1ebb t\u00e0i nguy\u00ean v\u00e0 kh\u00f4ng ph\u1ea3i qua l\u1edbp \u1ea3o h\u00f3a, <a href=\"https:\/\/interdata.vn\/blog\/dedicated-server-la-gi\/\">Dedicated Server<\/a> s\u1eed d\u1ee5ng Enterprise NVMe SSD th\u01b0\u1eddng \u0111\u1ea1t m\u1ee9c \u0111\u1ed9 tr\u1ec5 th\u1ea5p nh\u1ea5t v\u00e0 \u1ed5n \u0111\u1ecbnh nh\u1ea5t, ti\u1ec7m c\u1eadn th\u00f4ng s\u1ed1 g\u1ed1c c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t ph\u1ea7n c\u1ee9ng (th\u01b0\u1eddng\u00a0<strong>d\u01b0\u1edbi 0.04 ms<\/strong>).<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Bang-benchmark-tham-khao-nam-2026\"><\/span>B\u1ea3ng benchmark tham kh\u1ea3o n\u0103m 2026<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 b\u1ea3ng t\u1ed5ng h\u1ee3p c\u00e1c ch\u1ec9 s\u1ed1 \u0111\u1ed9 tr\u1ec5 trung b\u00ecnh (Average Latency) \u0111o b\u1eb1ng Ioping tr\u00ean c\u00e1c n\u1ec1n t\u1ea3ng l\u01b0u tr\u1eef ph\u1ed5 bi\u1ebfn hi\u1ec7n nay:<\/p>\n<table>\n<thead>\n<tr>\n<th align=\"left\">Lo\u1ea1i l\u01b0u tr\u1eef \/ H\u1ea1 t\u1ea7ng<\/th>\n<th align=\"left\">\u0110\u1ed9 tr\u1ec5 trung b\u00ecnh (Avg Latency)<\/th>\n<th align=\"left\">\u0110\u00e1nh gi\u00e1 hi\u1ec7u n\u0103ng<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td align=\"left\"><strong>Dedicated Server (Enterprise NVMe U.2\/U.3)<\/strong><\/td>\n<td align=\"left\">0.02 ms \u2013 0.05 ms<\/td>\n<td align=\"left\">Xu\u1ea5t s\u1eafc (Chuy\u00ean d\u1ee5ng cho DB n\u1eb7ng, AI, <a href=\"https:\/\/interdata.vn\/blog\/big-data-la-gi\/\">Big Data<\/a>)<\/td>\n<\/tr>\n<tr>\n<td align=\"left\"><strong>VPS NVMe Cao C\u1ea5p (Local Storage)<\/strong><\/td>\n<td align=\"left\">0.05 ms \u2013 0.15 ms<\/td>\n<td align=\"left\">R\u1ea5t t\u1ed1t (L\u00fd t\u01b0\u1edfng cho WordPress, WooCommerce, Web App)<\/td>\n<\/tr>\n<tr>\n<td align=\"left\"><strong><a href=\"https:\/\/interdata.vn\/blog\/vps-ssd-la-gi\/\">VPS SSD<\/a> SATA ti\u00eau chu\u1ea9n<\/strong><\/td>\n<td align=\"left\">0.3 ms \u2013 0.8 ms<\/td>\n<td align=\"left\">Kh\u00e1 (Ph\u00f9 h\u1ee3p web v\u1ec7 tinh, lab, m\u00f4i tr\u01b0\u1eddng test)<\/td>\n<\/tr>\n<tr>\n<td align=\"left\"><strong>Cloud Server (Network Storage SSD)<\/strong><\/td>\n<td align=\"left\">1.0 ms \u2013 3.0 ms<\/td>\n<td align=\"left\">Trung b\u00ecnh (\u0110\u1ed9 tr\u1ec5 b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi h\u1ea1 t\u1ea7ng m\u1ea1ng m\u1ea1ng <a href=\"https:\/\/interdata.vn\/blog\/san-storage-area-network-la-gi\/\">SAN<\/a>)<\/td>\n<\/tr>\n<tr>\n<td align=\"left\"><strong>M\u00e1y ch\u1ee7 ch\u1ea1y HDD c\u0169<\/strong><\/td>\n<td align=\"left\">10.0 ms \u2013 20.0 ms<\/td>\n<td align=\"left\">K\u00e9m (Ch\u1ec9 n\u00ean d\u00f9ng l\u00e0m Backup\/Archive d\u1eef li\u1ec7u \u00edt d\u00f9ng)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n<h2><span class=\"ez-toc-section\" id=\"Nhung-Yeu-To-Anh-Huong-Den-Ioping-Latency\"><\/span>Nh\u1eefng Y\u1ebfu T\u1ed1 \u1ea2nh H\u01b0\u1edfng \u0110\u1ebfn Ioping Latency<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0110\u1ed9 tr\u1ec5 l\u01b0u tr\u1eef kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t con s\u1ed1 c\u1ed1 \u0111\u1ecbnh. N\u00f3 b\u1ecb t\u00e1c \u0111\u1ed9ng b\u1edfi s\u1ef1 k\u1ebft h\u1ee3p c\u1ee7a nhi\u1ec1u y\u1ebfu t\u1ed1 ph\u1ea7n c\u1ee9ng l\u1eabn ph\u1ea7n m\u1ec1m:<\/p>\n<h3><span class=\"ez-toc-section\" id=\"1-Loai-o-cung\"><\/span>1. Lo\u1ea1i \u1ed5 c\u1ee9ng<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0110\u00e2y l\u00e0 y\u1ebfu t\u1ed1 quy\u1ebft \u0111\u1ecbnh h\u00e0ng \u0111\u1ea7u. S\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 m\u1eb7t v\u1eadt l\u00fd gi\u1eefa \u0111\u0129a quay HDD, chip nh\u1edb NAND Flash c\u1ee7a SSD SATA, hay giao th\u1ee9c PCIe b\u0103ng th\u00f4ng r\u1ed9ng c\u1ee7a NVMe t\u1ea1o n\u00ean ranh gi\u1edbi r\u00f5 r\u1ec7t v\u1ec1 m\u1eb7t \u0111\u1ed9 tr\u1ec5. C\u00e1c d\u00f2ng Enterprise SSD c\u00f2n \u0111\u01b0\u1ee3c trang b\u1ecb t\u1ee5 \u0111i\u1ec7n b\u1ea3o v\u1ec7 m\u1ea5t ngu\u1ed3n (Power Loss Protection &#8211; PLP) gi\u00fap qu\u00e1 tr\u00ecnh ghi d\u1eef li\u1ec7u v\u00e0o cache an to\u00e0n v\u00e0 nhanh h\u01a1n r\u1ea5t nhi\u1ec1u so v\u1edbi SSD Consumer.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"2-Controller-luu-tru-Bo-dieu-khien\"><\/span>2. Controller l\u01b0u tr\u1eef (B\u1ed9 \u0111i\u1ec1u khi\u1ec3n)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>C\u00e1ch th\u1ee9c k\u1ebft n\u1ed1i \u1ed5 c\u1ee9ng v\u1edbi <a href=\"https:\/\/interdata.vn\/blog\/mainboard-server-la-gi\/\">bo m\u1ea1ch ch\u1ee7<\/a> \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn \u0111\u01b0\u1eddng \u0111i c\u1ee7a d\u1eef li\u1ec7u. Vi\u1ec7c s\u1eed d\u1ee5ng <a href=\"https:\/\/interdata.vn\/blog\/raid-la-gi\/\">RAID<\/a> Controller (c\u00f3 ho\u1eb7c kh\u00f4ng c\u00f3 b\u1ed9 \u0111\u1ec7m Cache ghi l\u1ea1i &#8211; Write-back Cache), HBA (Host Bus Adapter) hay k\u1ebft n\u1ed1i tr\u1ef1c ti\u1ebfp qua NVMe Controller t\u00edch h\u1ee3p tr\u00ean <a href=\"https:\/\/interdata.vn\/blog\/cpu-server\/\">CPU<\/a> s\u1ebd quy\u1ebft \u0111\u1ecbnh th\u1eddi gian tr\u1ec5 c\u1ee7a t\u00edn hi\u1ec7u.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"3-Chat-luong-CPU\"><\/span>3. Ch\u1ea5t l\u01b0\u1ee3ng CPU<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>CPU \u0111\u00f3ng vai tr\u00f2 x\u1eed l\u00fd c\u00e1c y\u00eau c\u1ea7u ng\u1eaft (IRQ &#8211; Interrupt Requests) v\u00e0 qu\u1ea3n l\u00fd h\u00e0ng \u0111\u1ee3i I\/O. M\u1ed9t CPU c\u00f3 xung nh\u1ecbp \u0111\u01a1n nh\u00e2n cao v\u00e0 c\u00f4ng ngh\u1ec7 qu\u1ea3n l\u00fd h\u00e0ng \u0111\u1ee3i t\u1ed1t s\u1ebd gi\u00fap gi\u1ea3i ph\u00f3ng h\u00e0ng \u0111\u1ee3i nhanh h\u01a1n, t\u1eeb \u0111\u00f3 l\u00e0m gi\u1ea3m th\u1eddi gian ph\u1ea3n h\u1ed3i c\u1ee7a h\u1ec7 th\u1ed1ng l\u01b0u tr\u1eef.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"4-He-dieu-hanh-va-File-System\"><\/span>4. H\u1ec7 \u0111i\u1ec1u h\u00e0nh v\u00e0 File System<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>M\u1ed7i h\u1ec7 \u0111i\u1ec1u h\u00e0nh v\u00e0 \u0111\u1ecbnh d\u1ea1ng ph\u00e2n v\u00f9ng (File System) c\u00f3 c\u00e1ch t\u1ed5 ch\u1ee9c d\u1eef li\u1ec7u kh\u00e1c nhau:<\/p>\n<ul>\n<li><strong>EXT4, XFS:<\/strong>\u00a0C\u00e1c \u0111\u1ecbnh d\u1ea1ng ti\u00eau chu\u1ea9n, nh\u1eb9 nh\u00e0ng v\u00e0 cho \u0111\u1ed9 tr\u1ec5 r\u1ea5t t\u1ed1t tr\u00ean Linux.<\/li>\n<li><strong>ZFS, Btrfs:<\/strong>\u00a0Cung c\u1ea5p nhi\u1ec1u t\u00ednh n\u0103ng n\u00e2ng cao (<a href=\"https:\/\/interdata.vn\/blog\/snapshot-la-gi\/\">snapshot<\/a>, checksum, RAID ph\u1ea7n m\u1ec1m) nh\u01b0ng b\u00f9 l\u1ea1i s\u1ebd ti\u00eau t\u1ed1n nhi\u1ec1u t\u00e0i nguy\u00ean CPU\/RAM h\u01a1n v\u00e0 c\u00f3 th\u1ec3 l\u00e0m t\u0103ng nh\u1eb9 \u0111\u1ed9 tr\u1ec5 ghi d\u1eef li\u1ec7u n\u1ebfu kh\u00f4ng \u0111\u01b0\u1ee3c t\u1ed1i \u01b0u c\u1ea5u h\u00ecnh.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"5-Muc-do-tai-cua-may-chu\"><\/span>5. M\u1ee9c \u0111\u1ed9 t\u1ea3i c\u1ee7a m\u00e1y ch\u1ee7<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Khi m\u00e1y ch\u1ee7 r\u01a1i v\u00e0o t\u00ecnh tr\u1ea1ng qu\u00e1 t\u1ea3i (CPU Load cao, Disk Queue Length d\u00e0i, RAM b\u1ecb c\u1ea1n ki\u1ec7t d\u1eabn \u0111\u1ebfn ph\u1ea3i d\u00f9ng ph\u00e2n v\u00f9ng <a href=\"https:\/\/interdata.vn\/blog\/swap-memory-la-gi\/\">swap<\/a>), c\u00e1c y\u00eau c\u1ea7u \u0111\u1ecdc ghi s\u1ebd ph\u1ea3i x\u1ebfp h\u00e0ng ch\u1edd \u0111\u1ee3i l\u00e2u h\u01a1n, khi\u1ebfn Ioping Latency \u0111o \u0111\u01b0\u1ee3c t\u0103ng v\u1ecdt.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"6-Moi-truong-ao-hoa\"><\/span>6. M\u00f4i tr\u01b0\u1eddng \u1ea3o h\u00f3a<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>C\u00e1c c\u00f4ng ngh\u1ec7 \u1ea3o h\u00f3a nh\u01b0 <a href=\"https:\/\/interdata.vn\/blog\/kvm-la-gi\/\">KVM<\/a>, <a href=\"https:\/\/interdata.vn\/blog\/vmware-la-gi\/\">VMware<\/a> ESXi, <a href=\"https:\/\/interdata.vn\/blog\/hyper-v-la-gi\/\">Hyper-V<\/a> \u0111\u00f3ng vai tr\u00f2 ph\u00e2n chia t\u00e0i nguy\u00ean v\u1eadt l\u00fd th\u00e0nh c\u00e1c <a href=\"https:\/\/interdata.vn\/blog\/virtual-machine-la-gi\/\">m\u00e1y \u1ea3o<\/a> (VPS). N\u1ebfu driver \u1ea3o h\u00f3a (nh\u01b0\u00a0<code>virtio<\/code>\u00a0tr\u00ean KVM) kh\u00f4ng \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh t\u1ed1i \u01b0u, ho\u1eb7c b\u1ed9 si\u00eau gi\u00e1m s\u00e1t (<a href=\"https:\/\/interdata.vn\/blog\/hypervisor-la-gi\/\">Hypervisor<\/a>) b\u1ecb c\u1ea5u h\u00ecnh sai, \u0111\u1ed9 tr\u1ec5 l\u01b0u tr\u1eef c\u1ee7a VPS s\u1ebd b\u1ecb \u1ea3nh h\u01b0\u1edfng ti\u00eau c\u1ef1c.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"7-Overselling-tai-nguyen-Ban-qua-tai\"><\/span>7. Overselling t\u00e0i nguy\u00ean (B\u00e1n qu\u00e1 t\u1ea3i)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0110\u00e2y l\u00e0 t\u00ecnh tr\u1ea1ng ph\u1ed5 bi\u1ebfn \u1edf c\u00e1c d\u1ecbch v\u1ee5 VPS gi\u00e1 r\u1ebb. Khi nh\u00e0 cung c\u1ea5p chia s\u1ebb (share) chung m\u1ed9t c\u1ee5m \u1ed5 c\u1ee9ng v\u1eadt l\u00fd cho qu\u00e1 nhi\u1ec1u VPS tr\u00ean c\u00f9ng m\u1ed9t node m\u00e0 kh\u00f4ng gi\u1edbi h\u1ea1n (limit) IOPS\/b\u0103ng th\u00f4ng h\u1ee3p l\u00fd, hi\u1ec7n t\u01b0\u1ee3ng &#8220;h\u00e0ng x\u00f3m \u1ed3n \u00e0o&#8221; (noisy neighbor) s\u1ebd x\u1ea3y ra. Khi m\u1ed9t VPS ch\u1ea1y t\u00e1c v\u1ee5 n\u1eb7ng, to\u00e0n b\u1ed9 c\u00e1c VPS c\u00f2n l\u1ea1i tr\u00ean node \u0111\u00f3 s\u1ebd b\u1ecb \u1ea3nh h\u01b0\u1edfng, khi\u1ebfn \u0111\u1ed9 tr\u1ec5 l\u01b0u tr\u1eef t\u0103ng cao b\u1ea5t th\u01b0\u1eddng.<\/p>\n<hr \/>\n<h2><span class=\"ez-toc-section\" id=\"Huong-Dan-Do-Ioping-Latency-Tren-Linux\"><\/span>H\u01b0\u1edbng D\u1eabn \u0110o Ioping Latency Tr\u00ean Linux<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0110\u1ec3 t\u1ef1 m\u00ecnh ki\u1ec3m tra \u0111\u1ed9 tr\u1ec5 l\u01b0u tr\u1eef c\u1ee7a m\u00e1y ch\u1ee7 ho\u1eb7c VPS \u0111ang s\u1eed d\u1ee5ng, b\u1ea1n c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n theo h\u01b0\u1edbng d\u1eabn chi ti\u1ebft d\u01b0\u1edbi \u0111\u00e2y.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Buoc-1-Cai-dat-Ioping\"><\/span>B\u01b0\u1edbc 1: C\u00e0i \u0111\u1eb7t Ioping<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Ioping c\u00f3 s\u1eb5n trong kho t\u00e0i nguy\u00ean ch\u00ednh th\u1ee9c c\u1ee7a h\u1ea7u h\u1ebft c\u00e1c b\u1ea3n ph\u00e2n ph\u1ed1i Linux hi\u1ec7n nay.<\/p>\n<h4>Tr\u00ean Ubuntu \/ Debian:<\/h4>\n<pre><code class=\"language-bash\">sudo apt update\r\nsudo apt install ioping -y\r\n<\/code><\/pre>\n<h4>Tr\u00ean CentOS \/ AlmaLinux \/ Rocky Linux:<\/h4>\n<p>Tr\u01b0\u1edbc ti\u00ean b\u1ea1n c\u1ea7n k\u00edch ho\u1ea1t kho EPEL, sau \u0111\u00f3 ti\u1ebfn h\u00e0nh c\u00e0i \u0111\u1eb7t:<\/p>\n<pre><code class=\"language-bash\">sudo dnf install epel-release -y\r\nsudo dnf install ioping -y\r\n<\/code><\/pre>\n<hr \/>\n<h3><span class=\"ez-toc-section\" id=\"Buoc-2-Tien-hanh-cac-lenh-kiem-tra-latency\"><\/span>B\u01b0\u1edbc 2: Ti\u1ebfn h\u00e0nh c\u00e1c l\u1ec7nh ki\u1ec3m tra latency<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Sau khi c\u00e0i \u0111\u1eb7t th\u00e0nh c\u00f4ng, h\u00e3y th\u1ef1c thi c\u00e1c l\u1ec7nh sau t\u00f9y thu\u1ed9c v\u00e0o m\u1ee5c \u0111\u00edch ki\u1ec3m tra c\u1ee7a b\u1ea1n:<\/p>\n<h4>1. Ki\u1ec3m tra latency c\u01a1 b\u1ea3n (m\u1eb7c \u0111\u1ecbnh)<\/h4>\n<p>L\u1ec7nh n\u00e0y s\u1ebd th\u1ef1c hi\u1ec7n c\u00e1c y\u00eau c\u1ea7u \u0111\u1ecdc ng\u1eabu nhi\u00ean v\u1edbi k\u00edch th\u01b0\u1edbc block 4 KiB tr\u1ef1c ti\u1ebfp tr\u00ean th\u01b0 m\u1ee5c hi\u1ec7n t\u1ea1i. N\u00f3 s\u1ebd ch\u1ea1y li\u00ean t\u1ee5c cho \u0111\u1ebfn khi b\u1ea1n nh\u1ea5n t\u1ed5 h\u1ee3p ph\u00edm\u00a0<code>Ctrl + C<\/code>\u00a0\u0111\u1ec3 d\u1eebng l\u1ea1i.<\/p>\n<pre><code class=\"language-bash\">ioping .\r\n<\/code><\/pre>\n<h4>2. Ki\u1ec3m tra Direct I\/O (B\u1ecf qua b\u1ed9 nh\u1edb \u0111\u1ec7m cache)<\/h4>\n<p>\u0110\u1ec3 \u0111\u00e1nh gi\u00e1 ch\u00ednh x\u00e1c hi\u1ec7u n\u0103ng th\u1ef1c t\u1ebf c\u1ee7a ph\u1ea7n c\u1ee9ng \u1ed5 \u0111\u0129a m\u00e0 kh\u00f4ng b\u1ecb \u0111\u00e1nh l\u1eeba b\u1edfi RAM cache c\u1ee7a h\u1ec7 \u0111i\u1ec1u h\u00e0nh, h\u00e3y th\u00eam tham s\u1ed1\u00a0<code>-D<\/code>:<\/p>\n<pre><code class=\"language-bash\">ioping -D .\r\n<\/code><\/pre>\n<h4>3. Ki\u1ec3m tra Random Access (Ch\u1ea1y gi\u1edbi h\u1ea1n s\u1ed1 l\u1ea7n)<\/h4>\n<p>\u0110\u1ec3 thu\u1eadn ti\u1ec7n cho vi\u1ec7c vi\u1ebft script ho\u1eb7c kh\u00f4ng mu\u1ed1n ph\u1ea3i nh\u1ea5n d\u1eebng th\u1ee7 c\u00f4ng, b\u1ea1n c\u00f3 th\u1ec3 gi\u1edbi h\u1ea1n s\u1ed1 l\u1ea7n g\u1eedi y\u00eau c\u1ea7u (v\u00ed d\u1ee5: 10 l\u1ea7n) b\u1eb1ng tham s\u1ed1\u00a0<code>-c 10<\/code>:<\/p>\n<pre><code class=\"language-bash\">ioping -c 10 .\r\n<\/code><\/pre>\n<hr \/>\n<h3><span class=\"ez-toc-section\" id=\"Buoc-3-Giai-thich-ket-qua-tra-ve\"><\/span>B\u01b0\u1edbc 3: Gi\u1ea3i th\u00edch k\u1ebft qu\u1ea3 tr\u1ea3 v\u1ec1<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t m\u1eabu k\u1ebft qu\u1ea3 tr\u1ea3 v\u1ec1 th\u1ef1c t\u1ebf khi ch\u1ea1y l\u1ec7nh\u00a0<code>ioping -c 10 .<\/code>\u00a0tr\u00ean m\u1ed9t VPS s\u1eed d\u1ee5ng \u1ed5 c\u1ee9ng NVMe ch\u1ea5t l\u01b0\u1ee3ng t\u1ed1t:<\/p>\n<pre><code class=\"language-text\">4 KiB &lt;&lt;&lt; . (ext4 \/dev\/vda1): request=1 time=124 us\r\n4 KiB &lt;&lt;&lt; . (ext4 \/dev\/vda1): request=2 time=135 us\r\n4 KiB &lt;&lt;&lt; . (ext4 \/dev\/vda1): request=3 time=118 us\r\n4 KiB &lt;&lt;&lt; . (ext4 \/dev\/vda1): request=4 time=140 us\r\n4 KiB &lt;&lt;&lt; . (ext4 \/dev\/vda1): request=5 time=129 us\r\n4 KiB &lt;&lt;&lt; . (ext4 \/dev\/vda1): request=6 time=131 us\r\n4 KiB &lt;&lt;&lt; . (ext4 \/dev\/vda1): request=7 time=122 us\r\n4 KiB &lt;&lt;&lt; . (ext4 \/dev\/vda1): request=8 time=127 us\r\n4 KiB &lt;&lt;&lt; . (ext4 \/dev\/vda1): request=9 time=138 us\r\n4 KiB &lt;&lt;&lt; . (ext4 \/dev\/vda1): request=10 time=125 us\r\n\r\n--- . (ext4 \/dev\/vda1) ioping statistics ---\r\n10 requests completed in 9.01 ms, 40 KiB read, 1.11 k iops, 4.34 MiB\/s\r\ngenerated 10 requests in 9.00 s, 40 KiB, 1 iops, 4.44 KiB\/s\r\nmin\/avg\/max\/mdev = 118 us \/ 128.9 us \/ 140 us \/ 6.9 us\r\n<\/code><\/pre>\n<p><strong>Ph\u00e2n t\u00edch chi ti\u1ebft c\u00e1c ch\u1ec9 s\u1ed1 t\u1eeb k\u1ebft qu\u1ea3 tr\u00ean:<\/strong><\/p>\n<ul>\n<li><code>4 KiB<\/code>: K\u00edch th\u01b0\u1edbc block d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho m\u1ed7i y\u00eau c\u1ea7u \u0111\u1ecdc.<\/li>\n<li><code>time=124 us<\/code>: Th\u1eddi gian ho\u00e0n th\u00e0nh y\u00eau c\u1ea7u th\u1ee9 nh\u1ea5t l\u00e0 124 microsecond (t\u01b0\u01a1ng \u0111\u01b0\u01a1ng $0.124\\text{ ms}$).<\/li>\n<li><code>10 requests completed in 9.01 ms<\/code>: Ho\u00e0n th\u00e0nh t\u1ed5ng c\u1ed9ng 10 y\u00eau c\u1ea7u trong th\u1eddi gian ch\u1ea1y th\u1ef1c t\u1ebf l\u00e0 $9.01\\text{ ms}$.<\/li>\n<li><code>1.11 k iops<\/code>: T\u1ed1c \u0111\u1ed9 x\u1eed l\u00fd \u0111\u1ea1t 1,110 IOPS cho c\u00e1c t\u00e1c v\u1ee5 \u0111\u01a1n lu\u1ed3ng (Single-thread v\u1edbi Queue Depth = 1).<\/li>\n<li><code>4.34 MiB\/s<\/code>: B\u0103ng th\u00f4ng \u0111\u1ecdc \u0111\u1ea1t \u0111\u01b0\u1ee3c t\u01b0\u01a1ng \u1ee9ng.<\/li>\n<li><code>min\/avg\/max\/mdev = 118 us \/ 128.9 us \/ 140 us \/ 6.9 us<\/code>:\n<ul>\n<li><strong>min (\u0110\u1ed9 tr\u1ec5 th\u1ea5p nh\u1ea5t):<\/strong>\u00a0$118\\text{ }\\mu\\text{s}$ ($0.118\\text{ ms}$).<\/li>\n<li><strong>avg (\u0110\u1ed9 tr\u1ec5 trung b\u00ecnh):<\/strong>\u00a0$128.9\\text{ }\\mu\\text{s}$ ($0.1289\\text{ ms}$). \u0110\u00e2y l\u00e0 k\u1ebft qu\u1ea3 l\u00fd t\u01b0\u1edfng cho th\u1ea5y VPS n\u00e0y \u0111ang s\u1eed d\u1ee5ng h\u1ec7 th\u1ed1ng l\u01b0u tr\u1eef NVMe c\u00f3 t\u1ed1c \u0111\u1ed9 ph\u1ea3n h\u1ed3i r\u1ea5t nhanh v\u00e0 m\u01b0\u1ee3t m\u00e0.<\/li>\n<li><strong>max (\u0110\u1ed9 tr\u1ec5 cao nh\u1ea5t):<\/strong>\u00a0$140\\text{ }\\mu\\text{s}$ ($0.140\\text{ ms}$). Vi\u1ec7c \u0111\u1ed9 tr\u1ec5 cao nh\u1ea5t r\u1ea5t s\u00e1t v\u1edbi \u0111\u1ed9 tr\u1ec5 trung b\u00ecnh ch\u1ee9ng t\u1ecf hi\u1ec7u n\u0103ng c\u1ef1c k\u1ef3 \u1ed5n \u0111\u1ecbnh, kh\u00f4ng b\u1ecb hi\u1ec7n t\u01b0\u1ee3ng gi\u1eadt lag c\u1ee5c b\u1ed9.<\/li>\n<li><strong>mdev (Mean Deviation &#8211; \u0110\u1ed9 l\u1ec7ch chu\u1ea9n trung b\u00ecnh):<\/strong>\u00a0Ch\u1ec9 $6.9\\text{ }\\mu\\text{s}$, cho th\u1ea5y s\u1ef1 bi\u1ebfn \u0111\u1ed9ng gi\u1eefa c\u00e1c l\u1ea7n \u0111o l\u00e0 si\u00eau nh\u1ecf, h\u1ec7 th\u1ed1ng l\u01b0u tr\u1eef ho\u1ea1t \u0111\u1ed9ng v\u00f4 c\u00f9ng nh\u1ea5t qu\u00e1n.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<hr \/>\n<h2><span class=\"ez-toc-section\" id=\"Cach-Doc-Va-Danh-Gia-Ket-Qua-Ioping-Dung-Cach\"><\/span>C\u00e1ch \u0110\u1ecdc V\u00e0 \u0110\u00e1nh Gi\u00e1 K\u1ebft Qu\u1ea3 Ioping \u0110\u00fang C\u00e1ch<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0110\u1ec3 tr\u00e1nh nh\u1eefng nh\u1eadn \u0111\u1ecbnh sai l\u1ea7m khi \u0111\u00e1nh gi\u00e1 hi\u1ec7u n\u0103ng l\u01b0u tr\u1eef th\u00f4ng qua c\u00f4ng c\u1ee5 Ioping, b\u1ea1n n\u00ean l\u01b0u \u00fd c\u00e1c nguy\u00ean t\u1eafc sau:<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Khong-chi-nhin-vao-latency-trung-binh\"><\/span>Kh\u00f4ng ch\u1ec9 nh\u00ecn v\u00e0o latency trung b\u00ecnh<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Ch\u1ec9 s\u1ed1 trung b\u00ecnh (Avg) \u0111\u00f4i khi c\u00f3 th\u1ec3 &#8220;che gi\u1ea5u&#8221; \u0111i c\u00e1c v\u1ea5n \u0111\u1ec1 nghi\u00eam tr\u1ecdng. V\u00ed d\u1ee5, m\u1ed9t h\u1ec7 th\u1ed1ng c\u00f3 9 l\u1ea7n \u0111o \u0111\u1ea1t $0.1\\text{ ms}$ nh\u01b0ng c\u00f3 1 l\u1ea7n \u0111o b\u1ecb ngh\u1ebdn l\u00ean t\u1edbi $100\\text{ ms}$. Con s\u1ed1 trung b\u00ecnh t\u00ednh ra v\u1eabn kh\u00e1 \u0111\u1eb9p, nh\u01b0ng th\u1ef1c t\u1ebf ng\u01b0\u1eddi d\u00f9ng c\u1ee7a b\u1ea1n s\u1ebd c\u00f3 nh\u1eefng kho\u1ea3nh kh\u1eafc tr\u1ea3i nghi\u1ec7m website b\u1ecb kh\u1ef1ng l\u1ea1i r\u00f5 r\u1ec7t.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Can-quan-tam-toi-latency-dinh-Max-Latency\"><\/span>C\u1ea7n quan t\u00e2m t\u1edbi latency \u0111\u1ec9nh (Max Latency)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>H\u00e3y quan s\u00e1t k\u1ef9 th\u00f4ng s\u1ed1\u00a0<code>max<\/code>. N\u1ebfu\u00a0<code>max<\/code>\u00a0v\u01b0\u1ee3t qu\u00e1 xa so v\u1edbi\u00a0<code>avg<\/code>\u00a0(v\u00ed d\u1ee5: trung b\u00ecnh l\u00e0 $0.2\\text{ ms}$ nh\u01b0ng t\u1ed1i \u0111a l\u00ean t\u1edbi $50\\text{ ms}$ ho\u1eb7c h\u01a1n), h\u1ec7 th\u1ed1ng l\u01b0u tr\u1eef c\u1ee7a b\u1ea1n \u0111ang c\u00f3 d\u1ea5u hi\u1ec7u kh\u00f4ng \u1ed5n \u0111\u1ecbnh, d\u1ec5 b\u1ecb hi\u1ec7n t\u01b0\u1ee3ng ngh\u1ebdn c\u1ed5 chai c\u1ee5c b\u1ed9 khi c\u00f3 nhi\u1ec1u ng\u01b0\u1eddi truy c\u1eadp c\u00f9ng l\u00fac.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Xem-xet-do-on-dinh-cua-ket-qua-chi-so-mdev\"><\/span>Xem x\u00e9t \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh c\u1ee7a k\u1ebft qu\u1ea3 (ch\u1ec9 s\u1ed1 mdev)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Ch\u1ec9 s\u1ed1\u00a0<code>mdev<\/code>\u00a0(\u0111\u1ed9 l\u1ec7ch chu\u1ea9n) c\u00e0ng th\u1ea5p ch\u1ee9ng t\u1ecf hi\u1ec7u n\u0103ng c\u1ee7a \u1ed5 c\u1ee9ng c\u00e0ng \u1ed5n \u0111\u1ecbnh. M\u1ed9t h\u1ec7 th\u1ed1ng l\u01b0u tr\u1eef doanh nghi\u1ec7p t\u1ed1t lu\u00f4n duy tr\u00ec \u0111\u01b0\u1ee3c s\u1ef1 nh\u1ea5t qu\u00e1n v\u1ec1 hi\u1ec7u n\u0103ng qua m\u1ecdi th\u1eddi \u0111i\u1ec3m.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Ket-hop-voi-fio-va-sysbench\"><\/span>K\u1ebft h\u1ee3p v\u1edbi fio v\u00e0 sysbench<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Ioping l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 tuy\u1ec7t v\u1eddi \u0111\u1ec3 \u0111o \u0111\u1ed9 tr\u1ec5 t\u1ee9c th\u1eddi m\u1ed9t c\u00e1ch nhanh ch\u00f3ng. Tuy nhi\u00ean, \u0111\u1ec3 c\u00f3 b\u1ee9c tranh to\u00e0n c\u1ea3nh v\u1ec1 hi\u1ec7u n\u0103ng d\u01b0\u1edbi t\u1ea3i n\u1eb7ng (stress-test), b\u1ea1n n\u00ean k\u1ebft h\u1ee3p s\u1eed d\u1ee5ng th\u00eam:<\/p>\n<ul>\n<li><strong>fio (Flexible I\/O Tester):<\/strong>\u00a0C\u00f4ng c\u1ee5 benchmark chuy\u00ean s\u00e2u, cho ph\u00e9p t\u00f9y bi\u1ebfn chi ti\u1ebft s\u1ed1 l\u01b0\u1ee3ng lu\u1ed3ng (threads), \u0111\u1ed9 s\u00e2u h\u00e0ng \u0111\u1ee3i (queue depth), t\u1ef7 l\u1ec7 \u0111\u1ecdc\/ghi ng\u1eabu nhi\u00ean.<\/li>\n<li><strong>sysbench:<\/strong>\u00a0Th\u00edch h\u1ee3p \u0111\u1ec3 \u0111o hi\u1ec7u n\u0103ng c\u01a1 s\u1edf d\u1eef li\u1ec7u v\u00e0 CPU t\u1ed5ng th\u1ec3 d\u01b0\u1edbi d\u1ea1ng m\u00f4 ph\u1ecfng k\u1ecbch b\u1ea3n th\u1ef1c t\u1ebf.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Kiem-tra-nhieu-thoi-diem-khac-nhau-trong-ngay\"><\/span>Ki\u1ec3m tra nhi\u1ec1u th\u1eddi \u0111i\u1ec3m kh\u00e1c nhau trong ng\u00e0y<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>N\u1ebfu b\u1ea1n \u0111ang s\u1eed d\u1ee5ng VPS ho\u1eb7c Cloud Server d\u00f9ng chung t\u00e0i nguy\u00ean (Shared hosting\/VPS), hi\u1ec7u n\u0103ng c\u00f3 th\u1ec3 thay \u0111\u1ed5i t\u00f9y thu\u1ed9c v\u00e0o m\u1ee9c \u0111\u1ed9 ho\u1ea1t \u0111\u1ed9ng c\u1ee7a c\u00e1c &#8220;l\u00e1ng gi\u1ec1ng&#8221; tr\u00ean c\u00f9ng m\u00e1y ch\u1ee7 v\u1eadt l\u00fd. H\u00e3y ch\u1ea1y ioping v\u00e0o c\u00e1c khung gi\u1edd kh\u00e1c nhau (v\u00ed d\u1ee5: 9h s\u00e1ng, 14h chi\u1ec1u, v\u00e0 2h \u0111\u00eam) \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 xem nh\u00e0 cung c\u1ea5p c\u00f3 th\u1ef1c hi\u1ec7n cam k\u1ebft ch\u1ea5t l\u01b0\u1ee3ng d\u1ecbch v\u1ee5 hay kh\u00f4ng.<\/p>\n<hr \/>\n<h2><span class=\"ez-toc-section\" id=\"Tam-Quan-Trong-Cua-Latency-Thap-Trong-Thuc-Te\"><\/span>T\u1ea7m Quan Tr\u1ecdng C\u1ee7a Latency Th\u1ea5p Trong Th\u1ef1c T\u1ebf<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0110\u1ed9 tr\u1ec5 l\u01b0u tr\u1eef th\u1ea5p mang l\u1ea1i nh\u1eefng l\u1ee3i \u00edch thi\u1ebft th\u1ef1c g\u00ec cho t\u1eebng k\u1ecbch b\u1ea3n tri\u1ec3n khai h\u1ec7 th\u1ed1ng?<\/p>\n<h3><span class=\"ez-toc-section\" id=\"VPS-Hosting\"><\/span>VPS Hosting<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>V\u1edbi c\u00e1c d\u1ecbch v\u1ee5 l\u01b0u tr\u1eef website, \u0111\u1ed9 tr\u1ec5 th\u1ea5p gi\u00fap web server (<a href=\"https:\/\/interdata.vn\/blog\/nginx-la-gi\/\">Nginx<\/a>, <a href=\"https:\/\/interdata.vn\/blog\/apache-la-gi\/\">Apache<\/a>, <a href=\"https:\/\/interdata.vn\/blog\/litespeed-la-gi\/\">LiteSpeed<\/a>) \u0111\u1ecdc c\u00e1c t\u1ec7p tin c\u1ea5u h\u00ecnh, t\u1ec7p tin m\u00e3 ngu\u1ed3n (PHP, Python, JS) v\u00e0 h\u00ecnh \u1ea3nh t\u1eeb \u1ed5 \u0111\u0129a l\u00ean b\u1ed9 nh\u1edb nhanh h\u01a1n, gi\u00fap th\u1eddi gian ph\u1ea3n h\u1ed3i trang web gi\u1ea3m xu\u1ed1ng \u0111\u00e1ng k\u1ec3, t\u1ed1i \u01b0u h\u00f3a tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Database\"><\/span>Database<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>C\u00e1c <a href=\"https:\/\/interdata.vn\/blog\/he-quan-tri-co-so-du-lieu-la-gi\/\">h\u1ec7 qu\u1ea3n tr\u1ecb c\u01a1 s\u1edf d\u1eef li\u1ec7u<\/a> li\u00ean t\u1ee5c th\u1ef1c hi\u1ec7n c\u00e1c t\u00e1c v\u1ee5 \u0111\u1ecdc ghi ng\u1eabu nhi\u00ean (Random Read\/Write). Khi latency th\u1ea5p, th\u1eddi gian ho\u00e0n th\u00e0nh m\u1ed9t truy v\u1ea5n (<a href=\"https:\/\/interdata.vn\/blog\/query-la-gi\/\">Query<\/a> Execution Time) s\u1ebd gi\u1ea3m \u0111i, gi\u00fap h\u1ec7 th\u1ed1ng ch\u1ecbu t\u1ea3i t\u1ed1t h\u01a1n khi c\u00f3 h\u00e0ng ngh\u00ecn ng\u01b0\u1eddi d\u00f9ng th\u1ef1c hi\u1ec7n mua s\u1eafm, t\u00ecm ki\u1ebfm s\u1ea3n ph\u1ea9m c\u00f9ng m\u1ed9t l\u00fac.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Virtualization-Ao-hoa\"><\/span>Virtualization (\u1ea2o h\u00f3a)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0110\u1ed1i v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng ch\u1ea1y nhi\u1ec1u m\u00e1y \u1ea3o (VM) tr\u00ean m\u1ed9t node v\u1eadt l\u00fd, \u0111\u1ed9 tr\u1ec5 th\u1ea5p gi\u00fap gi\u1ea3m thi\u1ec3u hi\u1ec7n t\u01b0\u1ee3ng ngh\u1ebdn I\/O ch\u00e9o gi\u1eefa c\u00e1c m\u00e1y \u1ea3o, gi\u00fap to\u00e0n b\u1ed9 h\u1ec7 sinh th\u00e1i \u1ea3o h\u00f3a ho\u1ea1t \u0111\u1ed9ng m\u01b0\u1ee3t m\u00e0, \u0111\u1ed3ng \u0111\u1ec1u.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Redis-va-Cache-Server\"><\/span>Redis v\u00e0 Cache Server<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>D\u00f9 Redis ho\u1ea1t \u0111\u1ed9ng ch\u1ee7 y\u1ebfu tr\u00ean RAM, nh\u01b0ng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o an to\u00e0n d\u1eef li\u1ec7u, n\u00f3 v\u1eabn c\u1ea7n ghi snapshot (RDB) ho\u1eb7c ghi nh\u1eadt k\u00fd append-only file (AOF) xu\u1ed1ng \u0111\u0129a c\u1ee9ng. \u0110\u1ed9 tr\u1ec5 l\u01b0u tr\u1eef th\u1ea5p \u0111\u1ea3m b\u1ea3o ti\u1ebfn tr\u00ecnh \u0111\u1ed3ng b\u1ed9 n\u00e0y di\u1ec5n ra nhanh ch\u00f3ng, kh\u00f4ng g\u00e2y \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u n\u0103ng x\u1eed l\u00fd ch\u00ednh tr\u00ean RAM.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"CICD-va-Build-Server\"><\/span>CI\/CD v\u00e0 Build Server<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>C\u00e1c h\u1ec7 th\u1ed1ng t\u1ef1 \u0111\u1ed9ng h\u00f3a ki\u1ec3m th\u1eed v\u00e0 \u0111\u00f3ng g\u00f3i ph\u1ea7n m\u1ec1m (nh\u01b0 <a href=\"https:\/\/interdata.vn\/blog\/jenkins-la-gi\/\">Jenkins<\/a>, <a href=\"https:\/\/interdata.vn\/blog\/gitlab-la-gi\/\">GitLab<\/a> CI, <a href=\"https:\/\/interdata.vn\/blog\/github-la-gi\/\">GitHub<\/a> Runners) th\u01b0\u1eddng ph\u1ea3i \u0111\u1ecdc\/ghi h\u00e0ng v\u1ea1n file m\u00e3 ngu\u1ed3n nh\u1ecf trong qu\u00e1 <a href=\"https:\/\/interdata.vn\/blog\/compiler-trinh-bien-dich-la-gi\/\">tr\u00ecnh bi\u00ean d\u1ecbch<\/a> code. \u1ed4 c\u1ee9ng c\u00f3 latency th\u1ea5p gi\u00fap r\u00fat ng\u1eafn \u0111\u00e1ng k\u1ec3 th\u1eddi gian build d\u1ef1 \u00e1n, n\u00e2ng cao hi\u1ec7u su\u1ea5t l\u00e0m vi\u1ec7c c\u1ee7a \u0111\u1ed9i ng\u0169 <a href=\"https:\/\/interdata.vn\/blog\/lap-trinh-la-gi\/\">l\u1eadp tr\u00ecnh<\/a> vi\u00ean.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Enterprise-Applications\"><\/span>Enterprise Applications<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>C\u00e1c ph\u1ea7n m\u1ec1m qu\u1ea3n tr\u1ecb doanh nghi\u1ec7p l\u1edbn nh\u01b0 ERP, <a href=\"https:\/\/interdata.vn\/blog\/crm-la-gi\/\">CRM<\/a>, hay h\u1ec7 th\u1ed1ng ph\u00e2n t\u00edch d\u1eef li\u1ec7u (Analytics) \u0111\u00f2i h\u1ecfi s\u1ef1 ch\u00ednh x\u00e1c v\u00e0 th\u1eddi gian ph\u1ea3n h\u1ed3i theo th\u1eddi gian th\u1ef1c (real-time). \u0110\u1ed9 tr\u1ec5 l\u01b0u tr\u1eef th\u1ea5p l\u00e0 n\u1ec1n t\u1ea3ng c\u1ed1t l\u00f5i \u0111\u1ec3 c\u00e1c h\u1ec7 th\u1ed1ng n\u00e0y v\u1eadn h\u00e0nh tr\u01a1n tru m\u00e0 kh\u00f4ng g\u1eb7p t\u00ecnh tr\u1ea1ng treo hay tr\u1ec5 b\u00e1o c\u00e1o.<\/p>\n<hr \/>\n<h2><span class=\"ez-toc-section\" id=\"Nhung-Hieu-Lam-Pho-Bien-Ve-Ioping-Latency\"><\/span>Nh\u1eefng Hi\u1ec3u L\u1ea7m Ph\u1ed5 Bi\u1ebfn V\u1ec1 Ioping Latency<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Trong qu\u00e1 tr\u00ecnh qu\u1ea3n tr\u1ecb h\u1ec7 th\u1ed1ng, ng\u01b0\u1eddi d\u00f9ng r\u1ea5t d\u1ec5 m\u1eafc ph\u1ea3i c\u00e1c hi\u1ec3u l\u1ea7m sau \u0111\u00e2y:<\/p>\n<h3><span class=\"ez-toc-section\" id=\"1-%E2%80%9CSSD-nao-cung-co-latency-thap-nhu-nhau%E2%80%9D\"><\/span>1. &#8220;SSD n\u00e0o c\u0169ng c\u00f3 latency th\u1ea5p nh\u01b0 nhau&#8221;<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>Th\u1ef1c t\u1ebf:<\/strong>\u00a0C\u00f3 s\u1ef1 ph\u00e2n c\u1ea5p r\u1ea5t l\u1edbn v\u1ec1 m\u1eb7t c\u00f4ng ngh\u1ec7. M\u1ed9t chi\u1ebfc SSD SATA gi\u00e1 r\u1ebb d\u00e0nh cho ng\u01b0\u1eddi d\u00f9ng ph\u1ed5 th\u00f4ng khi ph\u1ea3i ch\u1ecbu t\u1ea3i li\u00ean t\u1ee5c trong m\u00f4i tr\u01b0\u1eddng m\u00e1y ch\u1ee7 s\u1ebd nhanh ch\u00f3ng b\u1ecb qu\u00e1 nhi\u1ec7t, \u0111\u1ea7y cache v\u00e0 \u0111\u1ea9y \u0111\u1ed9 tr\u1ec5 l\u00ean ngang ng\u1eeda, th\u1eadm ch\u00ed t\u1ec7 h\u01a1n c\u1ea3 \u1ed5 c\u1ee9ng HDD. Trong khi \u0111\u00f3, c\u00e1c d\u00f2ng Enterprise SSD \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 duy tr\u00ec \u0111\u1ed9 tr\u1ec5 c\u1ef1c th\u1ea5p \u1ed5n \u0111\u1ecbnh d\u01b0\u1edbi m\u1ecdi \u00e1p l\u1ef1c t\u1ea3i.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"2-%E2%80%9CIOPS-cao-nghia-la-latency-luon-thap%E2%80%9D\"><\/span>2. &#8220;IOPS cao ngh\u0129a l\u00e0 latency lu\u00f4n th\u1ea5p&#8221;<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>Th\u1ef1c t\u1ebf:<\/strong>\u00a0IOPS cao ch\u1ec9 th\u1ec3 hi\u1ec7n kh\u1ea3 n\u0103ng x\u1eed l\u00fd s\u1ed1 l\u01b0\u1ee3ng l\u1edbn t\u00e1c v\u1ee5 khi h\u1ec7 th\u1ed1ng c\u00f3 h\u00e0ng \u0111\u1ee3i d\u00e0i. Nh\u01b0ng n\u1ebfu h\u00e0ng \u0111\u1ee3i qu\u00e1 d\u00e0i, th\u1eddi gian ch\u1edd \u0111\u1ee3i c\u1ee7a m\u1ed7i y\u00eau c\u1ea7u (latency) th\u1ef1c t\u1ebf s\u1ebd t\u0103ng l\u00ean. H\u1ec7 th\u1ed1ng l\u00fd t\u01b0\u1edfng l\u00e0 h\u1ec7 th\u1ed1ng \u0111\u1ea1t \u0111\u01b0\u1ee3c IOPS cao \u1edf m\u1ee9c \u0111\u1ed9 tr\u1ec5 (latency) th\u1ea5p nh\u1ea5t c\u00f3 th\u1ec3.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"3-%E2%80%9CToc-do-doc-ghi-MBs-quan-trong-hon-latency%E2%80%9D\"><\/span>3. &#8220;T\u1ed1c \u0111\u1ed9 \u0111\u1ecdc ghi MB\/s quan tr\u1ecdng h\u01a1n latency&#8221;<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>Th\u1ef1c t\u1ebf:<\/strong>\u00a0T\u1ed1c \u0111\u1ed9 MB\/s (Throughput) ch\u1ec9 quan tr\u1ecdng khi b\u1ea1n th\u01b0\u1eddng xuy\u00ean di chuy\u1ec3n c\u00e1c file dung l\u01b0\u1ee3ng l\u1edbn nh\u01b0 phim \u1ea3nh, b\u1ea3n backup. \u0110\u1ed1i v\u1edbi h\u1ea7u h\u1ebft c\u00e1c <a href=\"https:\/\/interdata.vn\/blog\/web-application-la-gi\/\">\u1ee9ng d\u1ee5ng web<\/a> v\u00e0 c\u01a1 s\u1edf d\u1eef li\u1ec7u, vi\u1ec7c truy xu\u1ea5t h\u00e0ng tri\u1ec7u file nh\u1ecf (\u0111\u1ed9 tr\u1ec5 ph\u1ea3n h\u1ed3i) m\u1edbi l\u00e0 y\u1ebfu t\u1ed1 quy\u1ebft \u0111\u1ecbnh t\u1ed1c \u0111\u1ed9 c\u1ee7a h\u1ec7 th\u1ed1ng.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"4-%E2%80%9CChi-can-benchmark-mot-lan-la-du%E2%80%9D\"><\/span>4. &#8220;Ch\u1ec9 c\u1ea7n benchmark m\u1ed9t l\u1ea7n l\u00e0 \u0111\u1ee7&#8221;<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>Th\u1ef1c t\u1ebf:<\/strong>\u00a0Hi\u1ec7u n\u0103ng c\u1ee7a c\u00e1c h\u1ec7 th\u1ed1ng m\u00e1y ch\u1ee7 \u1ea3o (VPS) c\u00f3 s\u1ef1 bi\u1ebfn \u0111\u1ed9ng li\u00ean t\u1ee5c theo th\u1eddi gian th\u1ef1c v\u00e0 theo m\u1ee9c \u0111\u1ed9 t\u1ea3i chung c\u1ee7a h\u1ea1 t\u1ea7ng. Vi\u1ec7c ch\u1ec9 \u0111o m\u1ed9t l\u1ea7n duy nh\u1ea5t l\u00fac v\u1eeba mua VPS kh\u00f4ng ph\u1ea3n \u00e1nh \u0111\u00fang ch\u1ea5t l\u01b0\u1ee3ng d\u1ecbch v\u1ee5 d\u00e0i h\u1ea1n c\u1ee7a nh\u00e0 cung c\u1ea5p.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"5-%E2%80%9CVPS-nao-dung-NVMe-cung-cho-hieu-nang-giong-nhau%E2%80%9D\"><\/span>5. &#8220;VPS n\u00e0o d\u00f9ng NVMe c\u0169ng cho hi\u1ec7u n\u0103ng gi\u1ed1ng nhau&#8221;<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>Th\u1ef1c t\u1ebf:<\/strong>\u00a0NVMe ch\u1ec9 l\u00e0 giao th\u1ee9c k\u1ebft n\u1ed1i. Hi\u1ec7u n\u0103ng th\u1ef1c t\u1ebf c\u00f2n ph\u1ee5 thu\u1ed9c v\u00e0o d\u00f2ng \u1ed5 c\u1ee9ng (Consumer hay Enterprise), c\u1ea5u h\u00ecnh \u1ea3o h\u00f3a c\u1ee7a nh\u00e0 cung c\u1ea5p, vi\u1ec7c h\u1ecd c\u00f3 chia s\u1ebb t\u00e0i nguy\u00ean qu\u00e1 m\u1ee9c (overselling) hay kh\u00f4ng, c\u0169ng nh\u01b0 hi\u1ec7u n\u0103ng x\u1eed l\u00fd c\u1ee7a CPU \u0111i k\u00e8m.<\/p>\n<hr \/>\n<h2><span class=\"ez-toc-section\" id=\"Nen-Chon-Loai-Luu-Tru-Nao-Theo-Nhu-Cau-Latency\"><\/span>N\u00ean Ch\u1ecdn Lo\u1ea1i L\u01b0u Tr\u1eef N\u00e0o Theo Nhu C\u1ea7u Latency?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0110\u1ec3 t\u1ed1i \u01b0u chi ph\u00ed v\u00e0 hi\u1ec7u n\u0103ng, b\u1ea1n c\u00f3 th\u1ec3 tham kh\u1ea3o g\u1ee3i \u00fd l\u1ef1a ch\u1ecdn lo\u1ea1i \u1ed5 c\u1ee9ng d\u01b0\u1edbi \u0111\u00e2y d\u1ef1a tr\u00ean nhu c\u1ea7u s\u1eed d\u1ee5ng th\u1ef1c t\u1ebf:<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Website-WordPress-Blog-ca-nhan\"><\/span>Website WordPress \/ Blog c\u00e1 nh\u00e2n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><strong>Y\u00eau c\u1ea7u latency:<\/strong>\u00a0\u1ede m\u1ee9c trung b\u00ecnh ($0.2\\text{ ms} &#8211; 0.8\\text{ ms}$).<\/li>\n<li><strong>Khuy\u1ebfn ngh\u1ecb:<\/strong>\u00a0S\u1eed d\u1ee5ng c\u00e1c g\u00f3i Hosting\/VPS ti\u00eau chu\u1ea9n d\u00f9ng SSD SATA ch\u1ea5t l\u01b0\u1ee3ng t\u1ed1t ho\u1eb7c NVMe SSD ph\u00e2n kh\u00fac trung c\u1ea5p l\u00e0 \u0111\u1ee7 \u0111\u1ec3 website t\u1ea3i nhanh v\u00e0 m\u01b0\u1ee3t m\u00e0.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Website-thuong-mai-dien-tu-WooCommerce-Magento%E2%80%A6\"><\/span>Website th\u01b0\u01a1ng m\u1ea1i \u0111i\u1ec7n t\u1eed (WooCommerce, Magento&#8230;)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><strong>Y\u00eau c\u1ea7u latency:<\/strong>\u00a0Th\u1ea5p v\u00e0 \u1ed5n \u0111\u1ecbnh ($0.05\\text{ ms} &#8211; 0.2\\text{ ms}$).<\/li>\n<li><strong>Khuy\u1ebfn ngh\u1ecb:<\/strong>\u00a0N\u00ean l\u1ef1a ch\u1ecdn c\u00e1c g\u00f3i VPS s\u1eed d\u1ee5ng ho\u00e0n to\u00e0n \u1ed5 c\u1ee9ng NVMe SSD \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o t\u1ed1c \u0111\u1ed9 ph\u1ea3n h\u1ed3i nhanh khi kh\u00e1ch h\u00e0ng th\u1ef1c hi\u1ec7n c\u00e1c thao t\u00e1c th\u00eam v\u00e0o gi\u1ecf h\u00e0ng v\u00e0 thanh to\u00e1n.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Database-Server-chuyen-dung\"><\/span>Database Server chuy\u00ean d\u1ee5ng<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><strong>Y\u00eau c\u1ea7u latency:<\/strong>\u00a0C\u1ef1c th\u1ea5p v\u00e0 c\u1ef1c k\u1ef3 \u1ed5n \u0111\u1ecbnh (D\u01b0\u1edbi $0.05\\text{ ms}$).<\/li>\n<li><strong>Khuy\u1ebfn ngh\u1ecb:<\/strong>\u00a0S\u1eed d\u1ee5ng Dedicated Server ho\u1eb7c c\u00e1c g\u00f3i <a href=\"https:\/\/interdata.vn\/blog\/cloud-vps-la-gi\/\">Cloud VPS<\/a> cao c\u1ea5p trang b\u1ecb \u1ed5 c\u1ee9ng chuy\u00ean d\u1ee5ng\u00a0<strong>Enterprise NVMe SSD<\/strong>\u00a0(nh\u01b0 c\u00e1c d\u00f2ng U.2\/U.3) k\u1ebft h\u1ee3p v\u1edbi c\u1ea5u h\u00ecnh RAID ph\u1ea7n c\u1ee9ng \u0111\u1ec3 b\u1ea3o v\u1ec7 an to\u00e0n d\u1eef li\u1ec7u.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Redis-Cache-Server\"><\/span>Redis \/ Cache Server<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><strong>Y\u00eau c\u1ea7u latency:<\/strong>\u00a0R\u1ea5t th\u1ea5p \u0111\u1ec3 tr\u00e1nh ngh\u1ebdn ti\u1ebfn tr\u00ecnh \u0111\u1ed3ng b\u1ed9 d\u1eef li\u1ec7u.<\/li>\n<li><strong>Khuy\u1ebfn ngh\u1ecb:<\/strong>\u00a0Ch\u1ecdn d\u00f2ng \u1ed5 c\u1ee9ng NVMe c\u00f3 t\u1ed1c \u0111\u1ed9 ghi ng\u1eabu nhi\u00ean (Random Write) t\u1ed1t v\u00e0 \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh cao.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"He-thong-ao-hoa-VPS-Private-Cloud\"><\/span>H\u1ec7 th\u1ed1ng \u1ea3o h\u00f3a VPS \/ Private Cloud<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><strong>Y\u00eau c\u1ea7u latency:<\/strong>\u00a0Th\u1ea5p \u0111\u1ed3ng \u0111\u1ec1u tr\u00ean to\u00e0n b\u1ed9 c\u00e1c m\u00e1y \u1ea3o.<\/li>\n<li><strong>Khuy\u1ebfn ngh\u1ecb:<\/strong>\u00a0X\u00e2y d\u1ef1ng h\u1ea1 t\u1ea7ng tr\u00ean c\u00e1c d\u00f2ng m\u00e1y ch\u1ee7 v\u1eadt l\u00fd s\u1eed d\u1ee5ng Enterprise NVMe SSD k\u1ebft h\u1ee3p c\u00f4ng ngh\u1ec7 l\u01b0u tr\u1eef ph\u00e2n t\u00e1n (nh\u01b0 <a href=\"https:\/\/interdata.vn\/blog\/ceph\/\">Ceph<\/a> SSD) c\u00f3 b\u0103ng th\u00f4ng m\u1ea1ng n\u1ed9i b\u1ed9 t\u1ed1i thi\u1ec3u 10Gbps &#8211; 25Gbps \u0111\u1ec3 h\u1ea1n ch\u1ebf \u0111\u1ed9 tr\u1ec5 truy\u1ec1n t\u1ea3i qua m\u1ea1ng.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"He-thong-AI-Big-Data-Analytics\"><\/span>H\u1ec7 th\u1ed1ng AI, Big Data, Analytics<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><strong>Y\u00eau c\u1ea7u latency:<\/strong>\u00a0M\u1ee9c t\u1ed1i thi\u1ec3u tuy\u1ec7t \u0111\u1ed1i \u0111\u1ec3 x\u1eed l\u00fd h\u00e0ng tri\u1ec7u ph\u00e9p t\u00ednh\/gi\u00e2y.<\/li>\n<li><strong>Khuy\u1ebfn ngh\u1ecb:<\/strong>\u00a0S\u1eed d\u1ee5ng Dedicated <a href=\"https:\/\/interdata.vn\/blog\/server-vat-ly-la-gi\/\">Server v\u1eadt l\u00fd<\/a> ch\u1ea1y tr\u1ef1c ti\u1ebfp tr\u00ean c\u00e1c d\u00f2ng SSD Enterprise cao c\u1ea5p nh\u1ea5t, k\u1ebft h\u1ee3p CPU th\u1ebf h\u1ec7 m\u1edbi c\u00f3 s\u1ed1 l\u01b0\u1ee3ng nh\u00e2n l\u1edbn.<\/li>\n<\/ul>\n<hr \/>\n<h2><span class=\"ez-toc-section\" id=\"Vi-Sao-VPS-Co-Ioping-Latency-Thap-Quan-Trong\"><\/span>V\u00ec Sao VPS C\u00f3 Ioping Latency Th\u1ea5p Quan Tr\u1ecdng?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0110\u1ed1i v\u1edbi c\u00e1c doanh nghi\u1ec7p v\u00e0 c\u00e1 nh\u00e2n \u0111ang v\u1eadn h\u00e0nh website, vi\u1ec7c s\u1edf h\u1eefu m\u1ed9t m\u00e1y ch\u1ee7 \u1ea3o VPS c\u00f3 \u0111\u1ed9 tr\u1ec5 l\u01b0u tr\u1eef (Ioping Latency) th\u1ea5p mang l\u1ea1i nh\u1eefng gi\u00e1 tr\u1ecb c\u1ed1t l\u00f5i sau:<\/p>\n<ul>\n<li><strong>T\u00e1c \u0111\u1ed9ng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn t\u1ed1c \u0111\u1ed9 t\u1ea3i website:<\/strong>\u00a0Gi\u1ea3m thi\u1ec3u t\u1ed1i \u0111a th\u1eddi gian ch\u1edd ph\u1ea3n h\u1ed3i \u0111\u1ea7u ti\u00ean t\u1eeb m\u00e1y ch\u1ee7 (TTFB), gi\u00fap trang web hi\u1ec3n th\u1ecb n\u1ed9i dung t\u1edbi ng\u01b0\u1eddi d\u00f9ng g\u1ea7n nh\u01b0 ngay l\u1eadp t\u1ee9c.<\/li>\n<li><strong>T\u00e1c \u0111\u1ed9ng \u0111\u1ebfn th\u1eddi gian ph\u1ea3n h\u1ed3i database:<\/strong>\u00a0C\u00e1c c\u00e2u l\u1ec7nh truy v\u1ea5n d\u1eef li\u1ec7u ph\u1ee9c t\u1ea1p \u0111\u01b0\u1ee3c x\u1eed l\u00fd nhanh ch\u00f3ng, h\u1ea1n ch\u1ebf t\u00ecnh tr\u1ea1ng qu\u00e1 t\u1ea3i ho\u1eb7c treo c\u01a1 s\u1edf d\u1eef li\u1ec7u khi l\u01b0\u1ee3ng truy c\u1eadp t\u0103ng \u0111\u1ed9t bi\u1ebfn.<\/li>\n<li><strong>N\u00e2ng cao tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng (UX):<\/strong>\u00a0Kh\u00e1ch h\u00e0ng kh\u00f4ng ph\u1ea3i ch\u1edd \u0111\u1ee3i l\u00e2u khi th\u1ef1c hi\u1ec7n c\u00e1c thao t\u00e1c t\u01b0\u01a1ng t\u00e1c tr\u00ean website, gi\u00fap t\u0103ng t\u1ef7 l\u1ec7 chuy\u1ec3n \u0111\u1ed5i mua h\u00e0ng v\u00e0 gi\u1eef ch\u00e2n kh\u00e1ch h\u00e0ng l\u00e2u h\u01a1n.<\/li>\n<li><strong>T\u00e1c \u0111\u1ed9ng t\u00edch c\u1ef1c \u0111\u1ebfn <a href=\"https:\/\/interdata.vn\/blog\/seo-la-gi\/\">SEO<\/a> v\u00e0 <a href=\"https:\/\/interdata.vn\/blog\/nhan-cpu-la-gi\/\">Core<\/a> Web Vitals:<\/strong>\u00a0C\u00e1c c\u00f4ng c\u1ee5 t\u00ecm ki\u1ebfm l\u1edbn nh\u01b0 Google \u0111\u00e1nh gi\u00e1 r\u1ea5t cao c\u00e1c website c\u00f3 t\u1ed1c \u0111\u1ed9 t\u1ea3i nhanh v\u00e0 ch\u1ec9 s\u1ed1 t\u01b0\u01a1ng t\u00e1c t\u1ed1t (nh\u01b0 INP &#8211; Interaction to Next Paint, LCP &#8211; Largest Contentful Paint). M\u1ed9t VPS c\u00f3 \u0111\u1ed9 tr\u1ec5 l\u01b0u tr\u1eef th\u1ea5p l\u00e0 n\u1ec1n t\u1ea3ng v\u1eefng ch\u1eafc gi\u00fap b\u1ea1n t\u1ed1i \u01b0u h\u00f3a c\u00e1c ch\u1ec9 s\u1ed1 n\u00e0y.<\/li>\n<li><strong>Kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng h\u1ec7 th\u1ed1ng d\u1ec5 d\u00e0ng h\u01a1n:<\/strong>\u00a0Khi website ph\u00e1t tri\u1ec3n v\u00e0 l\u01b0\u1ee3ng truy c\u1eadp t\u0103ng l\u00ean, m\u1ed9t h\u1ea1 t\u1ea7ng l\u01b0u tr\u1eef c\u00f3 \u0111\u1ed9 tr\u1ec5 th\u1ea5p v\u00e0 \u1ed5n \u0111\u1ecbnh s\u1ebd gi\u00fap h\u1ec7 th\u1ed1ng ch\u1ecbu t\u1ea3i t\u1ed1t h\u01a1n, gi\u1ea3m thi\u1ec3u chi ph\u00ed ph\u1ea3i n\u00e2ng c\u1ea5p t\u00e0i nguy\u00ean qu\u00e1 s\u1edbm.<\/li>\n<\/ul>\n<div style=\"border-left: 4px solid #0A4FF6; padding: 16px 20px; margin: 24px 0; background: #F5F8FF; border-radius: 8px; color: #0a1a3a;\">N\u1ebfu b\u1ea1n \u0111ang t\u00ecm ki\u1ebfm VPS c\u00f3 hi\u1ec7u n\u0103ng l\u01b0u tr\u1eef cao, ch\u1ec9 s\u1ed1 IOPS l\u1edbn v\u00e0 Ioping Latency th\u1ea5p, InterData cung c\u1ea5p c\u00e1c g\u00f3i <a href=\"https:\/\/interdata.vn\/thue-vps\/\" target=\"_blank\" rel=\"noopener\"><strong>thu\u00ea VPS<\/strong><\/a> s\u1eed d\u1ee5ng <strong>CPU th\u1ebf h\u1ec7 m\u1edbi<\/strong> k\u1ebft h\u1ee3p <strong>SSD NVMe U.2 Enterprise<\/strong> cho t\u1ed1c \u0111\u1ed9 truy xu\u1ea5t d\u1eef li\u1ec7u nhanh, \u1ed5n \u0111\u1ecbnh. H\u1ea1 t\u1ea7ng \u0111\u01b0\u1ee3c t\u1ed1i \u01b0u cho website, database, <a href=\"https:\/\/interdata.vn\/blog\/ung-dung-doanh-nghiep-la-gi\/\">\u1ee9ng d\u1ee5ng doanh nghi\u1ec7p<\/a> v\u00e0 h\u1ec7 th\u1ed1ng \u1ea3o h\u00f3a v\u1edbi <strong>b\u0103ng th\u00f4ng l\u1edbn<\/strong>, <strong><a href=\"https:\/\/interdata.vn\/blog\/network-speed-la-gi\/\">t\u1ed1c \u0111\u1ed9 m\u1ea1ng<\/a> cao<\/strong> c\u00f9ng m\u1ee9c <strong>chi ph\u00ed h\u1ee3p l\u00fd<\/strong>.<\/div>\n<hr \/>\n<h2><span class=\"ez-toc-section\" id=\"FAQ-%E2%80%93-Cau-Hoi-Thuong-Gap-Ve-Ioping-Latency\"><\/span>FAQ \u2013 C\u00e2u H\u1ecfi Th\u01b0\u1eddng G\u1eb7p V\u1ec1 Ioping Latency<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"1-Ioping-Latency-bao-nhieu-la-tot\"><\/span>1. Ioping Latency bao nhi\u00eau l\u00e0 t\u1ed1t?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0110\u1ed1i v\u1edbi m\u1ed9t VPS s\u1eed d\u1ee5ng \u1ed5 c\u1ee9ng NVMe ch\u1ea5t l\u01b0\u1ee3ng t\u1ed1t, \u0111\u1ed9 tr\u1ec5 trung b\u00ecnh (avg) \u0111o b\u1eb1ng Ioping n\u00ean n\u1eb1m trong kho\u1ea3ng\u00a0<strong>0.05 ms \u0111\u1ebfn 0.2 ms<\/strong>\u00a0(t\u01b0\u01a1ng \u0111\u01b0\u01a1ng 50 $\\mu$s \u0111\u1ebfn 200 $\\mu$s). N\u1ebfu k\u1ebft qu\u1ea3 d\u01b0\u1edbi\u00a0<strong>0.05 ms<\/strong>, \u0111\u00f3 l\u00e0 m\u1ee9c c\u1ef1c k\u1ef3 xu\u1ea5t s\u1eafc. N\u1ebfu \u0111\u1ed9 tr\u1ec5 v\u01b0\u1ee3t qu\u00e1\u00a0<strong>1.0 ms<\/strong>, h\u1ec7 th\u1ed1ng l\u01b0u tr\u1eef c\u00f3 th\u1ec3 \u0111ang b\u1ecb qu\u00e1 t\u1ea3i ho\u1eb7c \u0111ang s\u1eed d\u1ee5ng c\u00f4ng ngh\u1ec7 l\u01b0u tr\u1eef th\u1ebf h\u1ec7 c\u0169.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"2-Latency-duoi-01-ms-co-thuc-su-nhanh-khong\"><\/span>2. Latency d\u01b0\u1edbi 0.1 ms c\u00f3 th\u1ef1c s\u1ef1 nhanh kh\u00f4ng?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>C\u00f3, r\u1ea5t nhanh.<\/strong>\u00a0M\u1ee9c \u0111\u1ed9 tr\u1ec5 d\u01b0\u1edbi 0.1 ms (100 $\\mu$s) ngh\u0129a l\u00e0 thi\u1ebft b\u1ecb l\u01b0u tr\u1eef ph\u1ea3n h\u1ed3i c\u00e1c y\u00eau c\u1ea7u \u0111\u1ecdc ghi g\u1ea7n nh\u01b0 t\u1ee9c th\u1eddi. M\u1ee9c hi\u1ec7u n\u0103ng n\u00e0y \u0111\u1ea3m b\u1ea3o c\u00e1c \u1ee9ng d\u1ee5ng c\u01a1 s\u1edf d\u1eef li\u1ec7u v\u00e0 website n\u1eb7ng ho\u1ea1t \u0111\u1ed9ng c\u1ef1c k\u1ef3 m\u01b0\u1ee3t m\u00e0, kh\u00f4ng g\u1eb7p b\u1ea5t k\u1ef3 hi\u1ec7n t\u01b0\u1ee3ng ngh\u1ebdn hay tr\u1ec5 n\u00e0o t\u1eeb ph\u00eda ph\u1ea7n c\u1ee9ng l\u01b0u tr\u1eef.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"3-IOPS-cao-co-dong-nghia-VPS-manh-hon-khong\"><\/span>3. IOPS cao c\u00f3 \u0111\u1ed3ng ngh\u0129a VPS m\u1ea1nh h\u01a1n kh\u00f4ng?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>Kh\u00f4ng ho\u00e0n to\u00e0n \u0111\u00fang.<\/strong>\u00a0IOPS cao ch\u1ec9 th\u1ec3 hi\u1ec7n kh\u1ea3 n\u0103ng x\u1eed l\u00fd s\u1ed1 l\u01b0\u1ee3ng l\u1edbn y\u00eau c\u1ea7u \u0111\u1ed3ng th\u1eddi trong \u0111i\u1ec1u ki\u1ec7n l\u00fd thuy\u1ebft. N\u1ebfu ch\u1ec9 s\u1ed1 IOPS cao nh\u01b0ng \u0111i k\u00e8m v\u1edbi \u0111\u1ed9 tr\u1ec5 (latency) l\u1edbn ho\u1eb7c kh\u00f4ng \u1ed5n \u0111\u1ecbnh, VPS c\u1ee7a b\u1ea1n v\u1eabn s\u1ebd c\u00f3 c\u1ea3m gi\u00e1c b\u1ecb ch\u1eadm v\u00e0 ph\u1ea3n h\u1ed3i k\u00e9m m\u01b0\u1ee3t m\u00e0 khi ch\u1ea1y c\u00e1c \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf. H\u00e3y lu\u00f4n \u01b0u ti\u00ean s\u1ef1 c\u00e2n b\u1eb1ng gi\u1eefa IOPS cao v\u00e0 Latency th\u1ea5p.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"4-SSD-NVMe-va-SSD-SATA-chenh-lech-latency-bao-nhieu\"><\/span>4. SSD NVMe v\u00e0 SSD SATA ch\u00eanh l\u1ec7ch latency bao nhi\u00eau?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Th\u00f4ng th\u01b0\u1eddng, SSD NVMe c\u00f3 \u0111\u1ed9 tr\u1ec5 th\u1ea5p h\u01a1n SSD SATA t\u1eeb\u00a0<strong>3 \u0111\u1ebfn 10 l\u1ea7n<\/strong>. Trong khi SSD SATA ti\u00eau chu\u1ea9n th\u01b0\u1eddng c\u00f3 \u0111\u1ed9 tr\u1ec5 dao \u0111\u1ed9ng t\u1eeb\u00a0<strong>0.2 ms \u0111\u1ebfn 0.8 ms<\/strong>, th\u00ec SSD NVMe (\u0111\u1eb7c bi\u1ec7t l\u00e0 d\u00f2ng Enterprise) c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng \u0111\u1ea1t m\u1ee9c \u0111\u1ed9 tr\u1ec5 d\u01b0\u1edbi\u00a0<strong>0.05 ms<\/strong>.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"5-Co-nen-dung-Ioping-de-benchmark-VPS-khong\"><\/span>5. C\u00f3 n\u00ean d\u00f9ng Ioping \u0111\u1ec3 benchmark VPS kh\u00f4ng?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>R\u1ea5t n\u00ean.<\/strong>\u00a0Ioping l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 c\u1ef1c k\u1ef3 g\u1ecdn nh\u1eb9, an to\u00e0n v\u00e0 d\u1ec5 s\u1eed d\u1ee5ng \u0111\u1ec3 ki\u1ec3m tra nhanh \u0111\u1ed9 tr\u1ec5 l\u01b0u tr\u1eef c\u1ee7a VPS m\u00e0 kh\u00f4ng g\u00e2y \u1ea3nh h\u01b0\u1edfng l\u1edbn \u0111\u1ebfn hi\u1ec7u n\u0103ng c\u1ee7a c\u00e1c \u1ee9ng d\u1ee5ng \u0111ang ch\u1ea1y tr\u00ean h\u1ec7 th\u1ed1ng. N\u00f3 gi\u00fap b\u1ea1n ph\u00e1t hi\u1ec7n nhanh ch\u00f3ng c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 ngh\u1ebdn I\/O hay t\u00ecnh tr\u1ea1ng overselling t\u1eeb nh\u00e0 cung c\u1ea5p.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"6-Ioping-khac-gi-fio\"><\/span>6. Ioping kh\u00e1c g\u00ec fio?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><strong>Ioping:<\/strong>\u00a0Th\u00edch h\u1ee3p \u0111\u1ec3 \u0111o l\u01b0\u1eddng nhanh \u0111\u1ed9 tr\u1ec5 ph\u1ea3n h\u1ed3i t\u1ee9c th\u1eddi (latency) c\u1ee7a \u1ed5 \u0111\u0129a d\u01b0\u1edbi d\u1ea1ng \u0111\u01a1n lu\u1ed3ng (t\u01b0\u01a1ng t\u1ef1 nh\u01b0 ping m\u1ea1ng).<\/li>\n<li><strong>fio (Flexible I\/O Tester):<\/strong>\u00a0L\u00e0 c\u00f4ng c\u1ee5 benchmark chuy\u00ean s\u00e2u h\u01a1n, d\u00f9ng \u0111\u1ec3 ki\u1ec3m tra gi\u1edbi h\u1ea1n hi\u1ec7u n\u0103ng t\u1ed5ng th\u1ec3 c\u1ee7a \u1ed5 c\u1ee9ng (\u0111o IOPS t\u1ed1i \u0111a, b\u0103ng th\u00f4ng t\u1ed1i \u0111a) d\u01b0\u1edbi c\u00e1c k\u1ecbch b\u1ea3n t\u1ea3i n\u1eb7ng, nhi\u1ec1u lu\u1ed3ng x\u1eed l\u00fd \u0111\u1ed3ng th\u1eddi.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"7-Lam-sao-giam-Ioping-Latency-tren-Linux\"><\/span>7. L\u00e0m sao gi\u1ea3m Ioping Latency tr\u00ean Linux?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0110\u1ec3 t\u1ed1i \u01b0u v\u00e0 gi\u1ea3m \u0111\u1ed9 tr\u1ec5 l\u01b0u tr\u1eef tr\u00ean Linux, b\u1ea1n c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng m\u1ed9t s\u1ed1 ph\u01b0\u01a1ng ph\u00e1p sau:<\/p>\n<ul>\n<li>\u0110\u1ea3m b\u1ea3o \u0111ang s\u1eed d\u1ee5ng driver \u1ea3o h\u00f3a t\u1ed1i \u01b0u nh\u1ea5t (nh\u01b0\u00a0<code>virtio-blk<\/code>\u00a0ho\u1eb7c\u00a0<code>virtio-scsi<\/code>\u00a0tr\u00ean m\u00f4i tr\u01b0\u1eddng KVM).<\/li>\n<li>L\u1ef1a ch\u1ecdn b\u1ed9 l\u1eadp l\u1ecbch I\/O (I\/O Scheduler) ph\u00f9 h\u1ee3p trong h\u1ec7 \u0111i\u1ec1u h\u00e0nh (v\u00ed d\u1ee5: s\u1eed d\u1ee5ng\u00a0<code>none<\/code>\u00a0ho\u1eb7c\u00a0<code>kyber<\/code>\u00a0cho \u1ed5 c\u1ee9ng SSD\/NVMe t\u1ed1c \u0111\u1ed9 cao thay v\u00ec\u00a0<code>mq-deadline<\/code>).<\/li>\n<li>N\u00e2ng c\u1ea5p \u0111\u1ecbnh d\u1ea1ng ph\u00e2n v\u00f9ng l\u00ean c\u00e1c h\u1ec7 th\u1ed1ng t\u1ec7p tin hi\u1ec7n \u0111\u1ea1i v\u00e0 c\u1ea5u h\u00ecnh c\u00e1c tham s\u1ed1 mount t\u1ed1i \u01b0u (nh\u01b0 th\u00eam t\u00f9y ch\u1ecdn\u00a0<code>noatime<\/code>\u00a0\u0111\u1ec3 gi\u1ea3m vi\u1ec7c ghi nh\u1eadn th\u1eddi gian truy c\u1eadp file kh\u00f4ng c\u1ea7n thi\u1ebft).<\/li>\n<li>Tr\u00e1nh \u0111\u1ec3 ph\u00e2n v\u00f9ng \u1ed5 \u0111\u0129a b\u1ecb \u0111\u1ea7y qu\u00e1 80%, v\u00ec hi\u1ec7u n\u0103ng c\u1ee7a SSD th\u01b0\u1eddng gi\u1ea3m m\u1ea1nh khi dung l\u01b0\u1ee3ng tr\u1ed1ng c\u00f2n l\u1ea1i qu\u00e1 \u00edt.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"8-VPS-latency-thap-co-giup-website-SEO-tot-hon-khong\"><\/span>8. VPS latency th\u1ea5p c\u00f3 gi\u00fap website SEO t\u1ed1t h\u01a1n kh\u00f4ng?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>C\u00f3.<\/strong>\u00a0T\u1ed1c \u0111\u1ed9 trang web l\u00e0 m\u1ed9t trong nh\u1eefng y\u1ebfu t\u1ed1 x\u1ebfp h\u1ea1ng ch\u00ednh th\u1ee9c c\u1ee7a Google trong tr\u1ea3i nghi\u1ec7m tr\u00ean trang (Page Experience). M\u1ed9t VPS c\u00f3 \u0111\u1ed9 tr\u1ec5 l\u01b0u tr\u1eef th\u1ea5p gi\u00fap r\u00fat ng\u1eafn th\u1eddi gian ph\u1ea3n h\u1ed3i m\u00e1y ch\u1ee7, c\u1ea3i thi\u1ec7n \u0111\u00e1ng k\u1ec3 c\u00e1c ch\u1ec9 s\u1ed1 Core Web Vitals, t\u1eeb \u0111\u00f3 gi\u00e1n ti\u1ebfp gi\u00fap website c\u00f3 c\u01a1 h\u1ed9i x\u1ebfp h\u1ea1ng t\u1ed1t h\u01a1n tr\u00ean trang k\u1ebft qu\u1ea3 t\u00ecm ki\u1ebfm.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"9-Nen-uu-tien-IOPS-hay-Ioping-Latency-khi-thue-VPS\"><\/span>9. N\u00ean \u01b0u ti\u00ean IOPS hay Ioping Latency khi thu\u00ea VPS?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0110\u1ed1i v\u1edbi h\u1ea7u h\u1ebft c\u00e1c \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf (nh\u01b0 ch\u1ea1y Web Server, database v\u1eeba v\u00e0 nh\u1ecf, email server&#8230;), b\u1ea1n n\u00ean\u00a0<strong>\u01b0u ti\u00ean ch\u1ecdn VPS c\u00f3 Ioping Latency th\u1ea5p v\u00e0 \u1ed5n \u0111\u1ecbnh<\/strong>. \u0110\u1ed9 tr\u1ec5 th\u1ea5p mang l\u1ea1i c\u1ea3m gi\u00e1c ph\u1ea3n h\u1ed3i nhanh nh\u1ea1y t\u1ee9c th\u00ec cho ng\u01b0\u1eddi d\u00f9ng. Ch\u1ec9 khi b\u1ea1n v\u1eadn h\u00e0nh c\u00e1c h\u1ec7 th\u1ed1ng \u0111\u1eb7c th\u00f9 c\u1ea7n x\u1eed l\u00fd lu\u1ed3ng d\u1eef li\u1ec7u kh\u1ed5ng l\u1ed3 \u0111\u1ed3ng th\u1eddi (nh\u01b0 h\u1ec7 th\u1ed1ng ph\u00e2n t\u00edch d\u1eef li\u1ec7u l\u1edbn, log server t\u1eadp trung), b\u1ea1n m\u1edbi c\u1ea7n \u0111\u1eb7t \u01b0u ti\u00ean IOPS l\u00ean h\u00e0ng \u0111\u1ea7u.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Khi v\u1eadn h\u00e0nh m\u1ed9t h\u1ec7 th\u1ed1ng website, \u1ee9ng d\u1ee5ng ho\u1eb7c qu\u1ea3n tr\u1ecb m\u00e1y ch\u1ee7, nhi\u1ec1u ng\u01b0\u1eddi th\u01b0\u1eddng ch\u1ec9 quan t\u00e2m \u0111\u1ebfn c\u00e1c th\u00f4ng s\u1ed1 nh\u01b0 dung l\u01b0\u1ee3ng RAM, s\u1ed1 l\u01b0\u1ee3ng vCPU hay b\u0103ng th\u00f4ng m\u1ea1ng. Tuy nhi\u00ean, c\u00f3 m\u1ed9t y\u1ebfu t\u1ed1 \u00e2m th\u1ea7m nh\u01b0ng l\u1ea1i quy\u1ebft \u0111\u1ecbnh tr\u1ef1c ti\u1ebfp \u0111\u1ebfn \u0111\u1ed9 m\u01b0\u1ee3t m\u00e0, t\u1ed1c \u0111\u1ed9<\/p>\n","protected":false},"author":2,"featured_media":41543,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[162],"tags":[],"class_list":["post-41540","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-phan-cung"],"_links":{"self":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/41540","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/comments?post=41540"}],"version-history":[{"count":5,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/41540\/revisions"}],"predecessor-version":[{"id":41546,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/41540\/revisions\/41546"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/media\/41543"}],"wp:attachment":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/media?parent=41540"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/categories?post=41540"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/tags?post=41540"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}