{"id":35808,"date":"2026-01-21T14:56:12","date_gmt":"2026-01-21T07:56:12","guid":{"rendered":"https:\/\/interdata.vn\/blog\/?p=35808"},"modified":"2026-01-24T08:19:55","modified_gmt":"2026-01-24T01:19:55","slug":"snapshot-la-gi","status":"publish","type":"post","link":"https:\/\/interdata.vn\/blog\/snapshot-la-gi\/","title":{"rendered":"Snapshot l\u00e0 g\u00ec? Vai tr\u00f2, C\u00e1ch ho\u1ea1t \u0111\u1ed9ng &#038; So Snapshot v\u1edbi backup"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 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\/snapshot-la-gi\/#Snapshot-la-gi\" >Snapshot l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/interdata.vn\/blog\/snapshot-la-gi\/#Su-dung-snapshot-de-lam-gi\" >S\u1eed d\u1ee5ng snapshot \u0111\u1ec3 l\u00e0m g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/interdata.vn\/blog\/snapshot-la-gi\/#Co-che-hoat-dong-cua-Snapshot\" >C\u01a1 ch\u1ebf ho\u1ea1t \u0111\u1ed9ng c\u1ee7a Snapshot<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/interdata.vn\/blog\/snapshot-la-gi\/#Snapshot-toan-phan-Full-snapshot\" >Snapshot to\u00e0n ph\u1ea7n (Full snapshot)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/interdata.vn\/blog\/snapshot-la-gi\/#Snapshot-gia-tang-Incremental-snapshot\" >Snapshot gia t\u0103ng (Incremental snapshot)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/interdata.vn\/blog\/snapshot-la-gi\/#Co-che-Copy-on-Write-COW\" >C\u01a1 ch\u1ebf Copy-on-Write (COW)<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/interdata.vn\/blog\/snapshot-la-gi\/#Phan-loai-Snapshot-pho-bien\" >Ph\u00e2n lo\u1ea1i Snapshot ph\u1ed5 bi\u1ebfn<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/interdata.vn\/blog\/snapshot-la-gi\/#Copy-on-Write-Snapshot\" >Copy-on-Write Snapshot<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/interdata.vn\/blog\/snapshot-la-gi\/#Redirect-on-Write-Snapshot\" >Redirect-on-Write Snapshot<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/interdata.vn\/blog\/snapshot-la-gi\/#Split-Mirror-Snapshot\" >Split Mirror Snapshot<\/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\/snapshot-la-gi\/#Copy-on-Write-with-Background-Copy-Snapshot\" >Copy-on-Write with Background Copy Snapshot<\/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\/snapshot-la-gi\/#Continuous-Data-Protection-CDP-Snapshot\" >Continuous Data Protection (CDP) Snapshot<\/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\/snapshot-la-gi\/#Uu-diem-va-nhuoc-diem-khi-su-dung-Snapshot\" >\u01afu \u0111i\u1ec3m v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m khi s\u1eed d\u1ee5ng Snapshot<\/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\/snapshot-la-gi\/#Uu-diem\" >\u01afu \u0111i\u1ec3m<\/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\/snapshot-la-gi\/#Nhuoc-diem\" >Nh\u01b0\u1ee3c \u0111i\u1ec3m<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/interdata.vn\/blog\/snapshot-la-gi\/#Phan-biet-giua-Snapshot-va-Backup\" >Ph\u00e2n bi\u1ec7t gi\u1eefa Snapshot v\u00e0 Backup<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/interdata.vn\/blog\/snapshot-la-gi\/#Ung-dung-thuc-te-cua-Snapshot\" >\u1ee8ng d\u1ee5ng th\u1ef1c t\u1ebf c\u1ee7a Snapshot<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/interdata.vn\/blog\/snapshot-la-gi\/#Dung-trong-he-thong-ao-hoa-VMware-KVM-Hyper-V\" >D\u00f9ng trong h\u1ec7 th\u1ed1ng \u1ea3o h\u00f3a (VMware, KVM, Hyper-V)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/interdata.vn\/blog\/snapshot-la-gi\/#Dung-trong-cloud-server-AWS-Google-Cloud-InterData-Cloud\" >D\u00f9ng trong cloud server (AWS, Google Cloud, InterData Cloud)<\/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\/snapshot-la-gi\/#Dung-trong-DevOps-CI-CD-de-rollback-nhanh\" >D\u00f9ng trong DevOps \/ CI-CD \u0111\u1ec3 rollback nhanh<\/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\/snapshot-la-gi\/#Dung-trong-quan-tri-co-so-du-lieu\" >D\u00f9ng trong qu\u1ea3n tr\u1ecb c\u01a1 s\u1edf d\u1eef li\u1ec7u<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/interdata.vn\/blog\/snapshot-la-gi\/#Khi-nao-nen-va-khong-nen-su-dung-Snapshot\" >Khi n\u00e0o n\u00ean v\u00e0 kh\u00f4ng n\u00ean s\u1eed d\u1ee5ng Snapshot?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/interdata.vn\/blog\/snapshot-la-gi\/#Truong-hop-nen-su-dung-Snapshot\" >Tr\u01b0\u1eddng h\u1ee3p n\u00ean s\u1eed d\u1ee5ng Snapshot<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/interdata.vn\/blog\/snapshot-la-gi\/#Truong-hop-khong-nen-su-dung-Snapshot\" >Tr\u01b0\u1eddng h\u1ee3p kh\u00f4ng n\u00ean s\u1eed d\u1ee5ng Snapshot<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/interdata.vn\/blog\/snapshot-la-gi\/#Cach-tao-va-quan-ly-Snapshot-an-toan-hieu-qua\" >C\u00e1ch t\u1ea1o v\u00e0 qu\u1ea3n l\u00fd Snapshot an to\u00e0n, hi\u1ec7u qu\u1ea3<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/interdata.vn\/blog\/snapshot-la-gi\/#Cac-nguyen-tac-khi-tao-snapshot\" >C\u00e1c nguy\u00ean t\u1eafc khi t\u1ea1o snapshot<\/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\/snapshot-la-gi\/#Chinh-sach-luu-tru-va-don-dep-snapshot-dinh-ky\" >Ch\u00ednh s\u00e1ch l\u01b0u tr\u1eef v\u00e0 d\u1ecdn d\u1eb9p snapshot \u0111\u1ecbnh k\u1ef3<\/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\/snapshot-la-gi\/#Canh-bao-khi-su-dung-snapshot-sai-cach\" >C\u1ea3nh b\u00e1o khi s\u1eed d\u1ee5ng snapshot sai c\u00e1ch<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-29\" href=\"https:\/\/interdata.vn\/blog\/snapshot-la-gi\/#Snapshot-trong-moi-truong-Cloud-VPS\" >Snapshot trong m\u00f4i tr\u01b0\u1eddng Cloud &amp; VPS<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-30\" href=\"https:\/\/interdata.vn\/blog\/snapshot-la-gi\/#Snapshot-tren-VPS-cua-InterData\" >Snapshot tr\u00ean VPS c\u1ee7a InterData<\/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\/snapshot-la-gi\/#Dung-snapshot-khi-nang-cap-VPS-hoac-cai-dat-OS-moi\" >D\u00f9ng snapshot khi n\u00e2ng c\u1ea5p VPS ho\u1eb7c c\u00e0i \u0111\u1eb7t OS m\u1edbi<\/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\/snapshot-la-gi\/#So-sanh-snapshot-thu-cong-va-snapshot-tu-dong\" >So s\u00e1nh snapshot th\u1ee7 c\u00f4ng v\u00e0 snapshot t\u1ef1 \u0111\u1ed9ng<\/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\/snapshot-la-gi\/#Ket-luan\" >K\u1ebft lu\u1eadn<\/a><\/li><\/ul><\/nav><\/div>\n<p class=\"sapo\">Trong qu\u1ea3n tr\u1ecb h\u1ec7 th\u1ed1ng v\u00e0 l\u01b0u tr\u1eef d\u1eef li\u1ec7u, &#8220;Snapshot&#8221; l\u00e0 m\u1ed9t thu\u1eadt ng\u1eef c\u1ef1c k\u1ef3 quan tr\u1ecdng nh\u01b0ng kh\u00f4ng ph\u1ea3i ai c\u0169ng hi\u1ec3u r\u00f5. V\u1eady <a href=\"https:\/\/interdata.vn\/blog\/snapshot-la-gi\/\"><strong>Snapshot l\u00e0 g\u00ec<\/strong><\/a> v\u00e0 t\u1ea1i sao \u0111\u00e2y l\u1ea1i l\u00e0 c\u00f4ng c\u1ee5 kh\u00f4ng th\u1ec3 thi\u1ebfu \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o an to\u00e0n d\u1eef li\u1ec7u? B\u00e0i vi\u1ebft n\u00e0y c\u1ee7a <a href=\"https:\/\/interdata.vn\/\"><strong>InterData<\/strong><\/a> s\u1ebd gi\u1ea3i m\u00e3 to\u00e0n b\u1ed9 v\u1ec1 snapshot, t\u1eeb kh\u00e1i ni\u1ec7m, vai tr\u00f2, c\u01a1 ch\u1ebf ho\u1ea1t \u0111\u1ed9ng, ph\u00e2n bi\u1ec7t snapshot v\u1edbi backup v\u00e0 \u1ee9ng d\u1ee5ng snapshot tr\u00ean th\u1ef1c ti\u1ec5n, gi\u00fap b\u1ea1n t\u1ef1 tin b\u1ea3o v\u1ec7 h\u1ec7 th\u1ed1ng c\u1ee7a m\u00ecnh m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 nh\u1ea5t.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Snapshot-la-gi\"><\/span>Snapshot l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>Snapshot l\u00e0 b\u1ea3n ghi tr\u1ea1ng th\u00e1i c\u1ee7a m\u1ed9t h\u1ec7 th\u1ed1ng, d\u1eef li\u1ec7u, m\u00e1y \u1ea3o ho\u1eb7c t\u1ec7p t\u1ea1i m\u1ed9t th\u1eddi \u0111i\u1ec3m c\u1ee5 th\u1ec3.<\/strong> B\u1ea1n c\u00f3 th\u1ec3 h\u00ecnh dung snapshot nh\u01b0 m\u1ed9t &#8220;b\u1ee9c \u1ea3nh&#8221; k\u1ef9 thu\u1eadt s\u1ed1, \u0111\u00f3ng b\u0103ng ch\u00ednh x\u00e1c m\u1ecdi th\u1ee9 t\u1ea1i kho\u1ea3nh kh\u1eafc \u0111\u01b0\u1ee3c t\u1ea1o. C\u00f4ng ngh\u1ec7 n\u00e0y \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 sao l\u01b0u, kh\u00f4i ph\u1ee5c h\u1ec7 th\u1ed1ng nhanh ch\u00f3ng m\u00e0 kh\u00f4ng c\u1ea7n t\u1ea1m d\u1eebng ho\u1ea1t \u0111\u1ed9ng, ho\u1eb7c \u0111\u1ec3 t\u1ea1o c\u00e1c b\u1ea3n sao ph\u1ee5c v\u1ee5 m\u1ee5c \u0111\u00edch ki\u1ec3m th\u1eed.<\/p>\n<p>\u0110i\u1ec3m \u0111\u1eb7c bi\u1ec7t l\u00e0 snapshot th\u01b0\u1eddng kh\u00f4ng sao ch\u00e9p to\u00e0n b\u1ed9 d\u1eef li\u1ec7u. Thay v\u00e0o \u0111\u00f3, n\u00f3 t\u1ea1o ra m\u1ed9t b\u1ea3n ghi c\u00e1c con tr\u1ecf (pointers) tr\u1ecf \u0111\u1ebfn v\u1ecb tr\u00ed c\u1ee7a d\u1eef li\u1ec7u g\u1ed1c. \u0110i\u1ec1u n\u00e0y gi\u00fap vi\u1ec7c t\u1ea1o snapshot di\u1ec5n ra g\u1ea7n nh\u01b0 t\u1ee9c th\u00ec v\u00e0 r\u1ea5t ti\u1ebft ki\u1ec7m dung l\u01b0\u1ee3ng.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-35922\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/11\/Snapshot-1.jpg\" alt=\"Snapshot\" width=\"600\" height=\"420\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/11\/Snapshot-1.jpg 600w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/11\/Snapshot-1-300x210.jpg 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Su-dung-snapshot-de-lam-gi\"><\/span>S\u1eed d\u1ee5ng snapshot \u0111\u1ec3 l\u00e0m g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Snapshot \u0111\u01b0\u1ee3c t\u1ea1o ra \u0111\u1ec3 ph\u1ee5c v\u1ee5 nhi\u1ec1u m\u1ee5c \u0111\u00edch quan tr\u1ecdng, gi\u00fap t\u0103ng c\u01b0\u1eddng s\u1ef1 an to\u00e0n v\u00e0 linh ho\u1ea1t cho h\u1ec7 th\u1ed1ng. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 nh\u1eefng c\u00f4ng d\u1ee5ng ch\u00ednh:<\/p>\n<ul>\n<li><strong>Ph\u1ee5c h\u1ed3i d\u1eef li\u1ec7u nhanh:<\/strong> \u0110\u00e2y l\u00e0 m\u1ee5c \u0111\u00edch ph\u1ed5 bi\u1ebfn nh\u1ea5t. Tr\u01b0\u1edbc khi th\u1ef1c hi\u1ec7n m\u1ed9t thao t\u00e1c c\u00f3 r\u1ee7i ro cao nh\u01b0 n\u00e2ng c\u1ea5p ph\u1ea7n m\u1ec1m, c\u1eadp nh\u1eadt h\u1ec7 \u0111i\u1ec1u h\u00e0nh ho\u1eb7c thay \u0111\u1ed5i c\u1ea5u h\u00ecnh quan tr\u1ecdng, ng\u01b0\u1eddi qu\u1ea3n tr\u1ecb s\u1ebd t\u1ea1o m\u1ed9t snapshot. N\u1ebfu s\u1ef1 c\u1ed1 x\u1ea3y ra, h\u1ecd c\u00f3 th\u1ec3 ngay l\u1eadp t\u1ee9c &#8220;rollback&#8221; (quay lui) h\u1ec7 th\u1ed1ng v\u1ec1 tr\u1ea1ng th\u00e1i \u1ed5n \u0111\u1ecbnh ngay tr\u01b0\u1edbc khi thay \u0111\u1ed5i.<\/li>\n<li><strong>Ki\u1ec3m th\u1eed v\u00e0 ph\u00e1t tri\u1ec3n (Testing &amp; Development):<\/strong> Snapshot cho ph\u00e9p c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n t\u1ea1o ra m\u1ed9t b\u1ea3n sao y h\u1ec7t c\u1ee7a m\u00f4i tr\u01b0\u1eddng s\u1ea3n ph\u1ea9m. Tr\u00ean b\u1ea3n sao n\u00e0y, h\u1ecd c\u00f3 th\u1ec3 t\u1ef1 do th\u1eed nghi\u1ec7m t\u00ednh n\u0103ng m\u1edbi, c\u00e0i \u0111\u1eb7t \u1ee9ng d\u1ee5ng m\u00e0 kh\u00f4ng s\u1ee3 l\u00e0m \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn h\u1ec7 th\u1ed1ng \u0111ang ch\u1ea1y th\u1eadt.<\/li>\n<li><strong>B\u1ea3o v\u1ec7 tr\u01b0\u1edbc c\u00e1c thay \u0111\u1ed5i l\u1edbn:<\/strong> Khi c\u1ea7n di chuy\u1ec3n d\u1eef li\u1ec7u, thay \u0111\u1ed5i c\u1ea5u tr\u00fac c\u01a1 s\u1edf d\u1eef li\u1ec7u hay tri\u1ec3n khai m\u1ed9t b\u1ea3n c\u1eadp nh\u1eadt l\u1edbn, snapshot \u0111\u00f3ng vai tr\u00f2 nh\u01b0 m\u1ed9t &#8220;\u0111i\u1ec3m an to\u00e0n&#8221; \u0111\u1ec3 quay v\u1ec1 n\u1ebfu c\u00f3 b\u1ea5t tr\u1eafc.<\/li>\n<li><strong>H\u1ed7 tr\u1ee3 qu\u00e1 tr\u00ecnh sao l\u01b0u (Backup):<\/strong> Snapshot gi\u00fap &#8220;\u0111\u00f3ng b\u0103ng&#8221; tr\u1ea1ng th\u00e1i d\u1eef li\u1ec7u t\u1ea1i m\u1ed9t th\u1eddi \u0111i\u1ec3m, \u0111\u1ea3m b\u1ea3o b\u1ea3n sao l\u01b0u (backup) c\u00f3 t\u00ednh nh\u1ea5t qu\u00e1n v\u00e0 to\u00e0n v\u1eb9n. N\u1ebfu kh\u00f4ng c\u00f3 snapshot, d\u1eef li\u1ec7u c\u00f3 th\u1ec3 b\u1ecb thay \u0111\u1ed5i ngay trong l\u00fac qu\u00e1 tr\u00ecnh backup \u0111ang di\u1ec5n ra, d\u1eabn \u0111\u1ebfn b\u1ea3n sao l\u01b0u b\u1ecb l\u1ed7i.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Co-che-hoat-dong-cua-Snapshot\"><\/span>C\u01a1 ch\u1ebf ho\u1ea1t \u0111\u1ed9ng c\u1ee7a Snapshot<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0110\u1ec3 hi\u1ec3u t\u1ea1i sao snapshot l\u1ea1i nhanh v\u00e0 hi\u1ec7u qu\u1ea3, ch\u00fang ta c\u1ea7n xem x\u00e9t c\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng b\u00ean trong c\u1ee7a c\u00f4ng ngh\u1ec7 n\u00e0y. H\u1ea7u h\u1ebft c\u00e1c h\u1ec7 th\u1ed1ng snapshot hi\u1ec7n \u0111\u1ea1i kh\u00f4ng sao ch\u00e9p to\u00e0n b\u1ed9 d\u1eef li\u1ec7u m\u00e0 s\u1eed d\u1ee5ng c\u00e1c k\u1ef9 thu\u1eadt th\u00f4ng minh \u0111\u1ec3 ti\u1ebft ki\u1ec7m th\u1eddi gian v\u00e0 kh\u00f4ng gian l\u01b0u tr\u1eef.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-35921\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/11\/Nguyen-ly-hoat-dong-cua-snapshot.jpg\" alt=\"Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a snapshot\" width=\"600\" height=\"420\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/11\/Nguyen-ly-hoat-dong-cua-snapshot.jpg 600w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/11\/Nguyen-ly-hoat-dong-cua-snapshot-300x210.jpg 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Snapshot-toan-phan-Full-snapshot\"><\/span>Snapshot to\u00e0n ph\u1ea7n (Full snapshot)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0110\u00e2y l\u00e0 ph\u01b0\u01a1ng ph\u00e1p s\u01a1 khai nh\u1ea5t, th\u1ef1c hi\u1ec7n sao ch\u00e9p to\u00e0n b\u1ed9 d\u1eef li\u1ec7u g\u1ed1c t\u1ea1i th\u1eddi \u0111i\u1ec3m t\u1ea1o snapshot. C\u00e1ch l\u00e0m n\u00e0y \u0111\u1ea3m b\u1ea3o t\u00ednh \u0111\u1ed9c l\u1eadp nh\u01b0ng l\u1ea1i v\u00f4 c\u00f9ng t\u1ed1n k\u00e9m v\u1ec1 dung l\u01b0\u1ee3ng l\u01b0u tr\u1eef v\u00e0 m\u1ea5t nhi\u1ec1u th\u1eddi gian \u0111\u1ec3 ho\u00e0n th\u00e0nh. Hi\u1ec7n nay, ph\u01b0\u01a1ng ph\u00e1p n\u00e0y r\u1ea5t \u00edt khi \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Snapshot-gia-tang-Incremental-snapshot\"><\/span>Snapshot gia t\u0103ng (Incremental snapshot)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Snapshot gia t\u0103ng l\u00e0 ph\u01b0\u01a1ng ph\u00e1p ph\u1ed5 bi\u1ebfn h\u01a1n, ch\u1ec9 l\u01b0u l\u1ea1i nh\u1eefng kh\u1ed1i d\u1eef li\u1ec7u \u0111\u00e3 b\u1ecb thay \u0111\u1ed5i (c\u00f2n g\u1ecdi l\u00e0 &#8220;delta&#8221;) k\u1ec3 t\u1eeb snapshot cu\u1ed1i c\u00f9ng \u0111\u01b0\u1ee3c t\u1ea1o. V\u00ed d\u1ee5, sau khi b\u1ea1n t\u1ea1o snapshot \u0111\u1ea7u ti\u00ean, h\u1ec7 th\u1ed1ng ch\u1ec9 c\u1ea7n ghi nh\u1eadn nh\u1eefng thay \u0111\u1ed5i ph\u00e1t sinh sau \u0111\u00f3 cho snapshot ti\u1ebfp theo. C\u00e1ch l\u00e0m n\u00e0y t\u1ed1i \u01b0u h\u00f3a kh\u00f4ng gian l\u01b0u tr\u1eef m\u1ed9t c\u00e1ch \u0111\u00e1ng k\u1ec3.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Co-che-Copy-on-Write-COW\"><\/span>C\u01a1 ch\u1ebf Copy-on-Write (COW)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Copy-on-Write (COW) l\u00e0 c\u01a1 ch\u1ebf c\u1ed1t l\u00f5i \u0111\u1eb1ng sau h\u1ea7u h\u1ebft c\u00e1c c\u00f4ng ngh\u1ec7 snapshot hi\u1ec7n \u0111\u1ea1i. Nguy\u00ean l\u00fd c\u1ee7a COW r\u1ea5t th\u00f4ng minh v\u00e0 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c gi\u1ea3i th\u00edch qua c\u00e1c b\u01b0\u1edbc sau:<\/p>\n<ol>\n<li><strong>Khi snapshot \u0111\u01b0\u1ee3c t\u1ea1o:<\/strong> H\u1ec7 th\u1ed1ng kh\u00f4ng sao ch\u00e9p b\u1ea5t k\u1ef3 d\u1eef li\u1ec7u n\u00e0o. Thay v\u00e0o \u0111\u00f3, m\u1ed9t b\u1ea3n ghi si\u00eau d\u1eef li\u1ec7u (metadata) \u0111\u01b0\u1ee3c t\u1ea1o ra, tr\u1ecf \u0111\u1ebfn t\u1ea5t c\u1ea3 c\u00e1c kh\u1ed1i d\u1eef li\u1ec7u c\u1ee7a \u1ed5 \u0111\u0129a g\u1ed1c. D\u1eef li\u1ec7u g\u1ed1c t\u1ea1m th\u1eddi b\u1ecb kh\u00f3a \u1edf tr\u1ea1ng th\u00e1i ch\u1ec9 \u0111\u1ecdc (read-only).<\/li>\n<li><strong>Khi c\u00f3 y\u00eau c\u1ea7u ghi d\u1eef li\u1ec7u m\u1edbi:<\/strong> Gi\u1ea3 s\u1eed h\u1ec7 th\u1ed1ng c\u1ea7n thay \u0111\u1ed5i kh\u1ed1i d\u1eef li\u1ec7u A. Thay v\u00ec ghi \u0111\u00e8 tr\u1ef1c ti\u1ebfp l\u00ean kh\u1ed1i A c\u0169, c\u01a1 ch\u1ebf COW s\u1ebd th\u1ef1c hi\u1ec7n hai vi\u1ec7c:\n<ul>\n<li><strong>Copy:<\/strong> Sao ch\u00e9p n\u1ed9i dung c\u1ee7a kh\u1ed1i A c\u0169 sang m\u1ed9t v\u1ecb tr\u00ed tr\u1ed1ng m\u1edbi tr\u00ean \u1ed5 \u0111\u0129a.<\/li>\n<li><strong>Write:<\/strong> Th\u1ef1c hi\u1ec7n thao t\u00e1c ghi m\u1edbi v\u00e0o v\u1ecb tr\u00ed c\u1ee7a kh\u1ed1i A g\u1ed1c.<\/li>\n<\/ul>\n<\/li>\n<li><strong>C\u1eadp nh\u1eadt con tr\u1ecf:<\/strong> Snapshot s\u1ebd ti\u1ebfp t\u1ee5c tr\u1ecf \u0111\u1ebfn kh\u1ed1i A c\u0169 (d\u1eef li\u1ec7u ch\u01b0a b\u1ecb thay \u0111\u1ed5i) \u0111\u00e3 \u0111\u01b0\u1ee3c sao ch\u00e9p \u0111i. Trong khi \u0111\u00f3, h\u1ec7 th\u1ed1ng ch\u00ednh s\u1ebd l\u00e0m vi\u1ec7c v\u1edbi kh\u1ed1i A m\u1edbi \u0111\u00e3 \u0111\u01b0\u1ee3c c\u1eadp nh\u1eadt.<\/li>\n<\/ol>\n<p>Nh\u1edd c\u01a1 ch\u1ebf n\u00e0y, snapshot lu\u00f4n duy tr\u00ec \u0111\u01b0\u1ee3c tr\u1ea1ng th\u00e1i nguy\u00ean v\u1eb9n c\u1ee7a d\u1eef li\u1ec7u t\u1ea1i th\u1eddi \u0111i\u1ec3m n\u00f3 \u0111\u01b0\u1ee3c t\u1ea1o ra, trong khi h\u1ec7 th\u1ed1ng v\u1eabn c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng v\u00e0 ghi d\u1eef li\u1ec7u m\u1edbi b\u00ecnh th\u01b0\u1eddng. \u0110\u00e2y ch\u00ednh l\u00e0 l\u00fd do snapshot \u0111\u01b0\u1ee3c t\u1ea1o ra r\u1ea5t nhanh v\u00e0 ch\u1ec9 chi\u1ebfm d\u1ee5ng th\u00eam dung l\u01b0\u1ee3ng khi d\u1eef li\u1ec7u g\u1ed1c c\u00f3 s\u1ef1 thay \u0111\u1ed5i.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Phan-loai-Snapshot-pho-bien\"><\/span>Ph\u00e2n lo\u1ea1i Snapshot ph\u1ed5 bi\u1ebfn<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Vi\u1ec7c ph\u00e2n lo\u1ea1i Snapshot gi\u00fap ng\u01b0\u1eddi d\u00f9ng d\u1ec5 d\u00e0ng x\u00e1c \u0111\u1ecbnh gi\u1ea3i ph\u00e1p ph\u00f9 h\u1ee3p v\u1edbi m\u1ee5c \u0111\u00edch s\u1eed d\u1ee5ng v\u00e0 nhu c\u1ea7u v\u1eadn h\u00e0nh th\u1ef1c t\u1ebf. Hi\u1ec7n nay, Snapshot th\u01b0\u1eddng \u0111\u01b0\u1ee3c chia th\u00e0nh c\u00e1c nh\u00f3m ph\u1ed5 bi\u1ebfn g\u1ed3m: <strong>Copy-on-Write Snapshots<\/strong>, <strong>Redirect-on-Write Snapshots<\/strong>, <strong>Split Mirror Snapshots<\/strong>, <strong>Copy-on-Write with Background Copy<\/strong> v\u00e0 <strong>Continuous Data Protection (CDP)<\/strong>.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-35920\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/11\/Cac-loai-snapshot.jpg\" alt=\"C\u00e1c lo\u1ea1i snapshot\" width=\"600\" height=\"420\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/11\/Cac-loai-snapshot.jpg 600w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/11\/Cac-loai-snapshot-300x210.jpg 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Copy-on-Write-Snapshot\"><\/span>Copy-on-Write Snapshot<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>Copy-on-Write Snapshot<\/strong> l\u00e0 c\u01a1 ch\u1ebf Snapshot l\u01b0u l\u1ea1i metadata ban \u0111\u1ea7u c\u1ee7a t\u1eebng kh\u1ed1i d\u1eef li\u1ec7u. H\u1ec7 th\u1ed1ng ch\u1ec9 t\u1ea1o b\u1ea3n sao khi d\u1eef li\u1ec7u ph\u00e1t sinh thay \u0111\u1ed5i, trong khi d\u1eef li\u1ec7u m\u1edbi s\u1ebd \u0111\u01b0\u1ee3c ghi \u0111\u00e8 l\u00ean d\u1eef li\u1ec7u g\u1ed1c. Nh\u1edd ch\u1ec9 sao ch\u00e9p khi c\u1ea7n thi\u1ebft, Copy-on-Write Snapshot gi\u00fap gi\u1ea3m m\u1ee9c ti\u00eau th\u1ee5 metadata, \u0111\u1ed3ng th\u1eddi h\u1ea1n ch\u1ebf s\u1ed1 l\u1ea7n ghi v\u00e0 \u0111\u1ecdc d\u1eef li\u1ec7u tr\u00ean h\u1ec7 th\u1ed1ng.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Redirect-on-Write-Snapshot\"><\/span>Redirect-on-Write Snapshot<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>Redirect-on-Write Snapshot<\/strong> ghi nh\u1eadn to\u00e0n b\u1ed9 c\u00e1c thay \u0111\u1ed5i c\u1ee7a kh\u1ed1i d\u1eef li\u1ec7u c\u1ea7n b\u1ea3o v\u1ec7 v\u00e0 chuy\u1ec3n h\u01b0\u1edbng d\u1eef li\u1ec7u m\u1edbi sang m\u1ed9t kh\u1ed1i l\u01b0u tr\u1eef kh\u00e1c. Trong khi \u0111\u00f3, d\u1eef li\u1ec7u ban \u0111\u1ea7u v\u1eabn \u0111\u01b0\u1ee3c gi\u1eef nguy\u00ean t\u1ea1i v\u1ecb tr\u00ed c\u0169. \u01afu \u0111i\u1ec3m c\u1ee7a c\u01a1 ch\u1ebf n\u00e0y l\u00e0 m\u1ed7i thay \u0111\u1ed5i ch\u1ec9 c\u1ea7n ghi m\u1ed9t l\u1ea7n, tuy nhi\u00ean n\u00f3 c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn d\u1eef li\u1ec7u g\u1ed1c trong qu\u00e1 tr\u00ecnh v\u1eadn h\u00e0nh.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Split-Mirror-Snapshot\"><\/span>Split Mirror Snapshot<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>Split Mirror Snapshot<\/strong> t\u1ea1o ra m\u1ed9t b\u1ea3n sao ho\u00e0n ch\u1ec9nh c\u1ee7a to\u00e0n b\u1ed9 d\u1eef li\u1ec7u t\u1ea1i th\u1eddi \u0111i\u1ec3m Snapshot \u0111\u01b0\u1ee3c kh\u1edfi t\u1ea1o, t\u1eeb \u0111\u00f3 gi\u00fap qu\u00e1 tr\u00ecnh kh\u00f4i ph\u1ee5c d\u1eef li\u1ec7u tr\u1edf n\u00ean \u0111\u01a1n gi\u1ea3n v\u00e0 tr\u1ef1c quan h\u01a1n. D\u00f9 vi\u1ec7c t\u1ea1o b\u1ea3n sao kh\u00f4ng y\u00eau c\u1ea7u th\u00eam b\u01b0\u1edbc x\u1eed l\u00fd ph\u1ee9c t\u1ea1p, lo\u1ea1i Snapshot n\u00e0y l\u1ea1i ti\u00eau t\u1ed1n nhi\u1ec1u dung l\u01b0\u1ee3ng l\u01b0u tr\u1eef v\u00e0 c\u1ea7n th\u1eddi gian x\u1eed l\u00fd d\u00e0i h\u01a1n so v\u1edbi c\u00e1c ph\u01b0\u01a1ng ph\u00e1p kh\u00e1c.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Copy-on-Write-with-Background-Copy-Snapshot\"><\/span>Copy-on-Write with Background Copy Snapshot<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>Copy-on-Write with Background Copy<\/strong> cho ph\u00e9p t\u1ea1o Snapshot m\u1ed9t c\u00e1ch linh ho\u1ea1t nh\u1edd k\u1ebft h\u1ee3p \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a Split Mirror v\u00e0 Copy-on-Write. C\u01a1 ch\u1ebf n\u00e0y gi\u00fap c\u00e2n b\u1eb1ng gi\u1eefa t\u1ed1c \u0111\u1ed9 t\u1ea1o Snapshot v\u00e0 kh\u1ea3 n\u0103ng sao ch\u00e9p d\u1eef li\u1ec7u, mang l\u1ea1i tr\u1ea3i nghi\u1ec7m tri\u1ec3n khai \u0111\u01a1n gi\u1ea3n h\u01a1n trong m\u1ed9t s\u1ed1 k\u1ecbch b\u1ea3n s\u1eed d\u1ee5ng.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Continuous-Data-Protection-CDP-Snapshot\"><\/span>Continuous Data Protection (CDP) Snapshot<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>Continuous Data Protection<\/strong> l\u00e0 ph\u01b0\u01a1ng th\u1ee9c t\u1ea1o Snapshot li\u00ean t\u1ee5c d\u1ef1a tr\u00ean b\u1ea3n d\u1eef li\u1ec7u g\u1ed1c m\u1ed7i khi c\u00f3 thay \u0111\u1ed5i x\u1ea3y ra. Nh\u1edd ghi nh\u1eadn d\u1eef li\u1ec7u theo th\u1eddi gian th\u1ef1c, CDP gi\u00fap r\u00fat ng\u1eafn \u0111\u00e1ng k\u1ec3 th\u1eddi gian kh\u00f4i ph\u1ee5c khi x\u1ea3y ra s\u1ef1 c\u1ed1. Tuy nhi\u00ean, ph\u01b0\u01a1ng ph\u00e1p n\u00e0y \u0111\u00f2i h\u1ecfi nhi\u1ec1u b\u0103ng th\u00f4ng v\u00e0 t\u00e0i nguy\u00ean h\u1ec7 th\u1ed1ng h\u01a1n so v\u1edbi c\u00e1c lo\u1ea1i Snapshot th\u00f4ng th\u01b0\u1eddng.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Uu-diem-va-nhuoc-diem-khi-su-dung-Snapshot\"><\/span>\u01afu \u0111i\u1ec3m v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m khi s\u1eed d\u1ee5ng Snapshot<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Snapshot l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 m\u1ea1nh m\u1ebd nh\u01b0ng c\u0169ng c\u00f3 nh\u1eefng gi\u1edbi h\u1ea1n ri\u00eang. Hi\u1ec3u r\u00f5 c\u1ea3 hai m\u1eb7t c\u1ee7a v\u1ea5n \u0111\u1ec1 gi\u00fap b\u1ea1n s\u1eed d\u1ee5ng c\u00f4ng ngh\u1ec7 n\u00e0y m\u1ed9t c\u00e1ch th\u00f4ng minh v\u00e0 an to\u00e0n h\u01a1n.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Uu-diem\"><\/span>\u01afu \u0111i\u1ec3m<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><strong>Ph\u1ee5c h\u1ed3i nhanh ch\u00f3ng:<\/strong> Kh\u1ea3 n\u0103ng quay l\u1ea1i m\u1ed9t tr\u1ea1ng th\u00e1i h\u1ec7 th\u1ed1ng g\u1ea7n nh\u01b0 ngay l\u1eadp t\u1ee9c l\u00e0 \u01b0u \u0111i\u1ec3m l\u1edbn nh\u1ea5t.<\/li>\n<li><strong>Ti\u1ebft ki\u1ec7m dung l\u01b0\u1ee3ng:<\/strong> Nh\u1edd c\u01a1 ch\u1ebf COW v\u00e0 snapshot gia t\u0103ng, dung l\u01b0\u1ee3ng c\u1ea7n thi\u1ebft \u0111\u1ec3 l\u01b0u tr\u1eef th\u01b0\u1eddng nh\u1ecf h\u01a1n nhi\u1ec1u so v\u1edbi m\u1ed9t b\u1ea3n sao l\u01b0u \u0111\u1ea7y \u0111\u1ee7.<\/li>\n<li><strong>Linh ho\u1ea1t trong th\u1eed nghi\u1ec7m:<\/strong> D\u1ec5 d\u00e0ng t\u1ea1o v\u00e0 x\u00f3a nhi\u1ec1u \u0111i\u1ec3m kh\u00f4i ph\u1ee5c, t\u1ea1o \u0111i\u1ec1u ki\u1ec7n l\u00fd t\u01b0\u1edfng cho vi\u1ec7c th\u1eed nghi\u1ec7m ph\u1ea7n m\u1ec1m v\u00e0 c\u1ea5u h\u00ecnh m\u1edbi.<\/li>\n<li><strong>Kh\u00f4ng l\u00e0m gi\u00e1n \u0111o\u1ea1n h\u1ec7 th\u1ed1ng:<\/strong> Vi\u1ec7c t\u1ea1o snapshot kh\u00f4ng y\u00eau c\u1ea7u ph\u1ea3i t\u1eaft m\u00e1y hay d\u1eebng c\u00e1c d\u1ecbch v\u1ee5 \u0111ang ch\u1ea1y.<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-35923\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/11\/Snapshot-2.jpg\" alt=\"Snapshot\" width=\"600\" height=\"420\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/11\/Snapshot-2.jpg 600w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/11\/Snapshot-2-300x210.jpg 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Nhuoc-diem\"><\/span>Nh\u01b0\u1ee3c \u0111i\u1ec3m<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><strong>Kh\u00f4ng th\u1ec3 thay th\u1ebf backup:<\/strong> \u0110\u00e2y l\u00e0 \u0111i\u1ec1u quan tr\u1ecdng nh\u1ea5t c\u1ea7n ghi nh\u1edb. Snapshot ph\u1ee5 thu\u1ed9c ho\u00e0n to\u00e0n v\u00e0o d\u1eef li\u1ec7u g\u1ed1c. N\u1ebfu \u1ed5 \u0111\u0129a ch\u1ee9a d\u1eef li\u1ec7u g\u1ed1c b\u1ecb h\u1ecfng ho\u1eb7c b\u1ecb x\u00f3a, t\u1ea5t c\u1ea3 c\u00e1c snapshot li\u00ean quan c\u0169ng s\u1ebd tr\u1edf n\u00ean v\u00f4 d\u1ee5ng.<\/li>\n<li><strong>C\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng hi\u1ec7u n\u0103ng:<\/strong> Vi\u1ec7c duy tr\u00ec m\u1ed9t chu\u1ed7i d\u00e0i c\u00e1c snapshot c\u00f3 th\u1ec3 l\u00e0m ch\u1eadm t\u1ed1c \u0111\u1ed9 \u0111\u1ecdc-ghi c\u1ee7a h\u1ec7 th\u1ed1ng. M\u1ed7i khi h\u1ec7 th\u1ed1ng c\u1ea7n truy xu\u1ea5t m\u1ed9t kh\u1ed1i d\u1eef li\u1ec7u, n\u00f3 ph\u1ea3i ki\u1ec3m tra qua nhi\u1ec1u l\u1edbp snapshot \u0111\u1ec3 t\u00ecm ra phi\u00ean b\u1ea3n \u0111\u00fang.<\/li>\n<li><strong>R\u1ee7i ro khi qu\u1ea3n l\u00fd k\u00e9m:<\/strong> N\u1ebfu kh\u00f4ng c\u00f3 ch\u00ednh s\u00e1ch qu\u1ea3n l\u00fd v\u00e0 d\u1ecdn d\u1eb9p h\u1ee3p l\u00fd, s\u1ed1 l\u01b0\u1ee3ng snapshot c\u00f3 th\u1ec3 t\u0103ng l\u00ean nhanh ch\u00f3ng, chi\u1ebfm d\u1ee5ng dung l\u01b0\u1ee3ng l\u01b0u tr\u1eef v\u00e0 g\u00e2y kh\u00f3 kh\u0103n trong vi\u1ec7c theo d\u00f5i.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Phan-biet-giua-Snapshot-va-Backup\"><\/span>Ph\u00e2n bi\u1ec7t gi\u1eefa Snapshot v\u00e0 Backup<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Nhi\u1ec1u ng\u01b0\u1eddi th\u01b0\u1eddng nh\u1ea7m l\u1eabn gi\u1eefa c\u00f4ng c\u1ee5 snapshot v\u00e0 backup, nh\u01b0ng th\u1ef1c ch\u1ea5t ch\u00fang l\u00e0 hai kh\u00e1i ni\u1ec7m ho\u00e0n to\u00e0n kh\u00e1c nhau, ph\u1ee5c v\u1ee5 nh\u1eefng m\u1ee5c \u0111\u00edch ri\u00eang bi\u1ec7t. M\u1ed9t chi\u1ebfn l\u01b0\u1ee3c b\u1ea3o v\u1ec7 d\u1eef li\u1ec7u to\u00e0n di\u1ec7n c\u1ea7n c\u00f3 s\u1ef1 k\u1ebft h\u1ee3p c\u1ee7a c\u1ea3 hai.<\/p>\n<p>B\u1ea3ng d\u01b0\u1edbi \u0111\u00e2y s\u1ebd gi\u00fap b\u1ea1n ph\u00e2n bi\u1ec7t r\u00f5 gi\u1eefa Snapshot v\u00e0 Backup.<\/p>\n<table>\n<thead>\n<tr>\n<th>Ti\u00eau ch\u00ed<\/th>\n<th>Snapshot<\/th>\n<th>Backup<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>M\u1ee5c \u0111\u00edch<\/strong><\/td>\n<td>Kh\u00f4i ph\u1ee5c nhanh tr\u1ea1ng th\u00e1i h\u1ec7 th\u1ed1ng trong th\u1eddi gian ng\u1eafn, ph\u1ee5c v\u1ee5 th\u1eed nghi\u1ec7m.<\/td>\n<td>L\u01b0u tr\u1eef d\u00e0i h\u1ea1n, ph\u00f2ng ng\u1eeba m\u1ea5t d\u1eef li\u1ec7u do th\u1ea3m h\u1ecda (h\u1ecfng ph\u1ea7n c\u1ee9ng, t\u1ea5n c\u00f4ng m\u1ea1ng).<\/td>\n<\/tr>\n<tr>\n<td><strong>T\u1ed1c \u0111\u1ed9<\/strong><\/td>\n<td>R\u1ea5t nhanh, t\u1ea1o v\u00e0 kh\u00f4i ph\u1ee5c g\u1ea7n nh\u01b0 t\u1ee9c th\u00ec.<\/td>\n<td>Ch\u1eadm h\u01a1n, ph\u1ee5 thu\u1ed9c v\u00e0o kh\u1ed1i l\u01b0\u1ee3ng d\u1eef li\u1ec7u v\u00e0 b\u0103ng th\u00f4ng m\u1ea1ng.<\/td>\n<\/tr>\n<tr>\n<td><strong>Dung l\u01b0\u1ee3ng<\/strong><\/td>\n<td>Th\u01b0\u1eddng nh\u1ecf, ch\u1ec9 l\u01b0u c\u00e1c kh\u1ed1i d\u1eef li\u1ec7u thay \u0111\u1ed5i.<\/td>\n<td>L\u1edbn, t\u1ea1o ra m\u1ed9t b\u1ea3n sao d\u1eef li\u1ec7u \u0111\u1ea7y \u0111\u1ee7 v\u00e0 \u0111\u1ed9c l\u1eadp.<\/td>\n<\/tr>\n<tr>\n<td><strong>Ph\u1ea1m vi<\/strong><\/td>\n<td>Ph\u1ee5 thu\u1ed9c v\u00e0o d\u1eef li\u1ec7u g\u1ed1c, l\u01b0u tr\u1eef tr\u00ean c\u00f9ng h\u1ec7 th\u1ed1ng l\u01b0u tr\u1eef.<\/td>\n<td>B\u1ea3n sao \u0111\u1ed9c l\u1eadp, n\u00ean \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef \u1edf m\u1ed9t v\u1ecb tr\u00ed v\u1eadt l\u00fd ho\u1eb7c \u0111\u1ecba l\u00fd kh\u00e1c.<\/td>\n<\/tr>\n<tr>\n<td><strong>Kh\u1ea3 n\u0103ng ph\u1ee5c h\u1ed3i<\/strong><\/td>\n<td>Ph\u1ee5c h\u1ed3i h\u1ec7 th\u1ed1ng v\u1ec1 m\u1ed9t \u0111i\u1ec3m th\u1eddi gian g\u1ea7n nh\u01b0 ngay l\u1eadp t\u1ee9c.<\/td>\n<td>C\u1ea7n th\u1eddi gian \u0111\u1ec3 t\u1ea3i v\u00e0 kh\u00f4i ph\u1ee5c to\u00e0n b\u1ed9 d\u1eef li\u1ec7u t\u1eeb b\u1ea3n sao l\u01b0u.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2><span class=\"ez-toc-section\" id=\"Ung-dung-thuc-te-cua-Snapshot\"><\/span>\u1ee8ng d\u1ee5ng th\u1ef1c t\u1ebf c\u1ee7a Snapshot<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>L\u00fd thuy\u1ebft v\u1ec1 snapshot s\u1ebd tr\u1edf n\u00ean d\u1ec5 hi\u1ec3u h\u01a1n khi ch\u00fang ta xem x\u00e9t c\u00e1c k\u1ecbch b\u1ea3n \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3 trong th\u1ef1c t\u1ebf c\u00f4ng vi\u1ec7c h\u00e0ng ng\u00e0y c\u1ee7a c\u00e1c qu\u1ea3n tr\u1ecb vi\u00ean h\u1ec7 th\u1ed1ng v\u00e0 nh\u00e0 ph\u00e1t tri\u1ec3n.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Dung-trong-he-thong-ao-hoa-VMware-KVM-Hyper-V\"><\/span>D\u00f9ng trong h\u1ec7 th\u1ed1ng \u1ea3o h\u00f3a (VMware, KVM, Hyper-V)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0110\u00e2y l\u00e0 \u1ee9ng d\u1ee5ng kinh \u0111i\u1ec3n nh\u1ea5t. M\u1ed9t qu\u1ea3n tr\u1ecb vi\u00ean chu\u1ea9n b\u1ecb c\u1eadp nh\u1eadt b\u1ea3n v\u00e1 b\u1ea3o m\u1eadt quan tr\u1ecdng cho m\u1ed9t m\u00e1y ch\u1ee7 \u1ea3o. \u0110\u1ec3 ph\u00f2ng ng\u1eeba r\u1ee7i ro, anh ta t\u1ea1o m\u1ed9t snapshot tr\u01b0\u1edbc khi b\u1eaft \u0111\u1ea7u. Sau khi c\u1eadp nh\u1eadt xong, \u1ee9ng d\u1ee5ng tr\u00ean m\u00e1y ch\u1ee7 g\u1eb7p l\u1ed7i t\u01b0\u01a1ng th\u00edch.<\/p>\n<p>Thay v\u00ec m\u1ea5t h\u00e0ng gi\u1edd \u0111\u1ec3 g\u1ee1 b\u1ea3n v\u00e1, anh ta ch\u1ec9 c\u1ea7n d\u00f9ng ch\u1ee9c n\u0103ng &#8220;Revert to Snapshot&#8221; v\u00e0 m\u00e1y ch\u1ee7 \u1ea3o s\u1ebd quay l\u1ea1i tr\u1ea1ng th\u00e1i \u1ed5n \u0111\u1ecbnh ban \u0111\u1ea7u ch\u1ec9 trong v\u00e0i ph\u00fat.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-35925\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/11\/Snapshot-may-chu-ao.jpg\" alt=\"Snapshot m\u00e1y ch\u1ee7 \u1ea3o\" width=\"600\" height=\"420\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/11\/Snapshot-may-chu-ao.jpg 600w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/11\/Snapshot-may-chu-ao-300x210.jpg 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Dung-trong-cloud-server-AWS-Google-Cloud-InterData-Cloud\"><\/span>D\u00f9ng trong cloud server (AWS, Google Cloud, InterData Cloud)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>M\u1ed9t c\u00f4ng ty \u0111ang s\u1eed d\u1ee5ng d\u1ecbch v\u1ee5 <strong>InterData Cloud<\/strong> v\u00e0 c\u1ea7n nh\u00e2n b\u1ea3n m\u1ed9t m\u00e1y ch\u1ee7 web \u0111\u00e3 \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh ho\u00e0n ch\u1ec9nh \u0111\u1ec3 t\u1ea1o th\u00e0nh m\u1ed9t c\u1ee5m ch\u1ecbu t\u1ea3i (load balancing). Thay v\u00ec c\u00e0i \u0111\u1eb7t v\u00e0 c\u1ea5u h\u00ecnh m\u1ed9t m\u00e1y ch\u1ee7 m\u1edbi t\u1eeb \u0111\u1ea7u, h\u1ecd ch\u1ec9 c\u1ea7n t\u1ea1o m\u1ed9t snapshot t\u1eeb \u1ed5 \u0111\u0129a c\u1ee7a m\u00e1y ch\u1ee7 hi\u1ec7n t\u1ea1i, sau \u0111\u00f3 d\u00f9ng snapshot \u0111\u00f3 \u0111\u1ec3 t\u1ea1o ra m\u1ed9t m\u00e1y ch\u1ee7 m\u1edbi. To\u00e0n b\u1ed9 qu\u00e1 tr\u00ecnh ch\u1ec9 m\u1ea5t v\u00e0i ph\u00fat.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Dung-trong-DevOps-CI-CD-de-rollback-nhanh\"><\/span>D\u00f9ng trong DevOps \/ CI-CD \u0111\u1ec3 rollback nhanh<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Trong m\u1ed9t quy tr\u00ecnh ph\u00e1t h\u00e0nh ph\u1ea7n m\u1ec1m li\u00ean t\u1ee5c (CI\/CD), m\u1ed9t phi\u00ean b\u1ea3n m\u1edbi c\u1ee7a \u1ee9ng d\u1ee5ng \u0111\u01b0\u1ee3c t\u1ef1 \u0111\u1ed9ng tri\u1ec3n khai l\u00ean m\u00f4i tr\u01b0\u1eddng s\u1ea3n ph\u1ea9m. Ngay sau khi tri\u1ec3n khai, h\u1ec7 th\u1ed1ng gi\u00e1m s\u00e1t ph\u00e1t hi\u1ec7n l\u1ed7i nghi\u00eam tr\u1ecdng. \u0110\u1ed9i ng\u0169 DevOps c\u00f3 th\u1ec3 k\u00edch ho\u1ea1t m\u1ed9t k\u1ecbch b\u1ea3n t\u1ef1 \u0111\u1ed9ng \u0111\u1ec3 rollback v\u1ec1 snapshot c\u1ee7a m\u00f4i tr\u01b0\u1eddng ngay tr\u01b0\u1edbc khi tri\u1ec3n khai, gi\u00fap gi\u1ea3m thi\u1ec3u th\u1eddi gian h\u1ec7 th\u1ed1ng ng\u1eebng ho\u1ea1t \u0111\u1ed9ng (downtime).<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Dung-trong-quan-tri-co-so-du-lieu\"><\/span>D\u00f9ng trong qu\u1ea3n tr\u1ecb c\u01a1 s\u1edf d\u1eef li\u1ec7u<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>B\u1ed9 ph\u1eadn ph\u00e2n t\u00edch kinh doanh c\u1ea7n ch\u1ea1y m\u1ed9t truy v\u1ea5n r\u1ea5t ph\u1ee9c t\u1ea1p \u0111\u1ec3 t\u1ed5ng h\u1ee3p b\u00e1o c\u00e1o qu\u00fd. Truy v\u1ea5n n\u00e0y c\u00f3 th\u1ec3 l\u00e0m ch\u1eadm c\u01a1 s\u1edf d\u1eef li\u1ec7u ch\u00ednh. \u0110\u1ec3 gi\u1ea3i quy\u1ebft, qu\u1ea3n tr\u1ecb vi\u00ean CSDL t\u1ea1o m\u1ed9t snapshot c\u1ee7a database. \u0110\u1ed9i ph\u00e2n t\u00edch s\u1ebd ch\u1ea1y truy v\u1ea5n tr\u00ean b\u1ea3n snapshot ch\u1ec9 \u0111\u1ecdc \u0111\u00f3, \u0111\u1ea3m b\u1ea3o kh\u00f4ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t c\u1ee7a h\u1ec7 th\u1ed1ng giao d\u1ecbch tr\u1ef1c tuy\u1ebfn.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Khi-nao-nen-va-khong-nen-su-dung-Snapshot\"><\/span>Khi n\u00e0o n\u00ean v\u00e0 kh\u00f4ng n\u00ean s\u1eed d\u1ee5ng Snapshot?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Snapshot l\u00e0 c\u00f4ng c\u1ee5 h\u1ed7 tr\u1ee3 qu\u1ea3n l\u00fd v\u00e0 b\u1ea3o v\u1ec7 d\u1eef li\u1ec7u hi\u1ec7u qu\u1ea3 trong nhi\u1ec1u t\u00ecnh hu\u1ed1ng, tuy nhi\u00ean kh\u00f4ng ph\u1ea3i l\u00fac n\u00e0o c\u0169ng n\u00ean \u00e1p d\u1ee5ng. Vi\u1ec7c x\u00e1c \u0111\u1ecbnh \u0111\u00fang th\u1eddi \u0111i\u1ec3m s\u1eed d\u1ee5ng Snapshot s\u1ebd gi\u00fap h\u1ec7 th\u1ed1ng v\u1eadn h\u00e0nh \u1ed5n \u0111\u1ecbnh v\u00e0 tr\u00e1nh c\u00e1c r\u1ee7i ro kh\u00f4ng c\u1ea7n thi\u1ebft.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Truong-hop-nen-su-dung-Snapshot\"><\/span>Tr\u01b0\u1eddng h\u1ee3p n\u00ean s\u1eed d\u1ee5ng Snapshot<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Snapshot n\u00ean \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng khi c\u1ea7n ghi l\u1ea1i tr\u1ea1ng th\u00e1i d\u1eef li\u1ec7u t\u1ea1i m\u1ed9t th\u1eddi \u0111i\u1ec3m c\u1ee5 th\u1ec3, \u0111\u1eb7c bi\u1ec7t tr\u01b0\u1edbc c\u00e1c thay \u0111\u1ed5i quan tr\u1ecdng c\u1ee7a h\u1ec7 th\u1ed1ng, bao g\u1ed3m:<\/p>\n<ul>\n<li>Tr\u01b0\u1edbc khi c\u1eadp nh\u1eadt h\u1ec7 \u0111i\u1ec1u h\u00e0nh, n\u00e2ng c\u1ea5p ph\u1ea7n m\u1ec1m ho\u1eb7c v\u00e1 l\u1ed7i h\u1ec7 th\u1ed1ng<\/li>\n<li>Tr\u01b0\u1edbc khi thay \u0111\u1ed5i c\u1ea5u h\u00ecnh m\u00e1y ch\u1ee7, \u1ee9ng d\u1ee5ng ho\u1eb7c d\u1ecbch v\u1ee5 \u0111ang ho\u1ea1t \u0111\u1ed9ng<\/li>\n<li>Trong m\u00f4i tr\u01b0\u1eddng ki\u1ec3m th\u1eed v\u00e0 ph\u00e1t tri\u1ec3n, nh\u1eb1m so s\u00e1nh d\u1eef li\u1ec7u tr\u01b0\u1edbc v\u00e0 sau khi th\u1ef1c hi\u1ec7n thay \u0111\u1ed5i<\/li>\n<li>Khi c\u1ea7n kh\u00f4i ph\u1ee5c nhanh h\u1ec7 th\u1ed1ng trong th\u1eddi gian ng\u1eafn n\u1ebfu ph\u00e1t sinh l\u1ed7i<\/li>\n<li>Tr\u01b0\u1eddng h\u1ee3p c\u1ea7n gi\u1ea3m th\u1eddi gian gi\u00e1n \u0111o\u1ea1n d\u1ecbch v\u1ee5 m\u00e0 kh\u00f4ng ph\u1ea3i th\u1ef1c hi\u1ec7n kh\u00f4i ph\u1ee5c d\u1eef li\u1ec7u t\u1eeb b\u1ea3n sao l\u01b0u \u0111\u1ea7y \u0111\u1ee7<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Truong-hop-khong-nen-su-dung-Snapshot\"><\/span>Tr\u01b0\u1eddng h\u1ee3p kh\u00f4ng n\u00ean s\u1eed d\u1ee5ng Snapshot<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Snapshot kh\u00f4ng \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 thay th\u1ebf cho c\u00e1c gi\u1ea3i ph\u00e1p sao l\u01b0u d\u1eef li\u1ec7u d\u00e0i h\u1ea1n. M\u1ed9t s\u1ed1 tr\u01b0\u1eddng h\u1ee3p kh\u00f4ng n\u00ean s\u1eed d\u1ee5ng Snapshot g\u1ed3m:<\/p>\n<ul>\n<li>L\u01b0u tr\u1eef d\u1eef li\u1ec7u trong th\u1eddi gian d\u00e0i v\u1edbi m\u1ee5c \u0111\u00edch backup l\u00e2u d\u00e0i<\/li>\n<li>T\u1ea1o qu\u00e1 nhi\u1ec1u Snapshot li\u00ean ti\u1ebfp, d\u1ec5 l\u00e0m t\u0103ng dung l\u01b0\u1ee3ng l\u01b0u tr\u1eef v\u00e0 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u n\u0103ng h\u1ec7 th\u1ed1ng<\/li>\n<li>S\u1eed d\u1ee5ng Snapshot nh\u01b0 ph\u01b0\u01a1ng \u00e1n b\u1ea3o v\u1ec7 d\u1eef li\u1ec7u duy nh\u1ea5t tr\u01b0\u1edbc c\u00e1c r\u1ee7i ro nghi\u00eam tr\u1ecdng nh\u01b0 l\u1ed7i ph\u1ea7n c\u1ee9ng ho\u1eb7c t\u1ea5n c\u00f4ng b\u1ea3o m\u1eadt<\/li>\n<li>L\u01b0u Snapshot tr\u00ean c\u00f9ng h\u1ea1 t\u1ea7ng v\u1edbi d\u1eef li\u1ec7u g\u1ed1c m\u00e0 kh\u00f4ng c\u00f3 gi\u1ea3i ph\u00e1p backup b\u1ed5 sung<\/li>\n<\/ul>\n<p>Trong th\u1ef1c t\u1ebf, Snapshot ch\u1ec9 n\u00ean \u0111\u00f3ng vai tr\u00f2 h\u1ed7 tr\u1ee3 kh\u00f4i ph\u1ee5c nhanh, \u0111\u1ed3ng th\u1eddi c\u1ea7n \u0111\u01b0\u1ee3c k\u1ebft h\u1ee3p v\u1edbi c\u00e1c gi\u1ea3i ph\u00e1p sao l\u01b0u chuy\u00ean d\u1ee5ng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o an to\u00e0n d\u1eef li\u1ec7u to\u00e0n di\u1ec7n.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Cach-tao-va-quan-ly-Snapshot-an-toan-hieu-qua\"><\/span>C\u00e1ch t\u1ea1o v\u00e0 qu\u1ea3n l\u00fd Snapshot an to\u00e0n, hi\u1ec7u qu\u1ea3<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0110\u1ec3 snapshot th\u1ef1c s\u1ef1 ph\u00e1t huy hi\u1ec7u qu\u1ea3 v\u00e0 kh\u00f4ng g\u00e2y ra r\u1ee7i ro, b\u1ea1n c\u1ea7n tu\u00e2n th\u1ee7 c\u00e1c nguy\u00ean t\u1eafc qu\u1ea3n l\u00fd ch\u1eb7t ch\u1ebd. Vi\u1ec7c s\u1eed d\u1ee5ng snapshot m\u1ed9t c\u00e1ch b\u1eeba b\u00e3i c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn l\u00e3ng ph\u00ed t\u00e0i nguy\u00ean v\u00e0 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Cac-nguyen-tac-khi-tao-snapshot\"><\/span>C\u00e1c nguy\u00ean t\u1eafc khi t\u1ea1o snapshot<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><strong>Ch\u1ec9 l\u01b0u tr\u1eef trong th\u1eddi gian ng\u1eafn:<\/strong> Snapshot ch\u1ec9 n\u00ean \u0111\u01b0\u1ee3c xem l\u00e0 m\u1ed9t gi\u1ea3i ph\u00e1p t\u1ea1m th\u1eddi. H\u00e3y x\u00f3a ch\u00fang ngay sau khi c\u00f4ng vi\u1ec7c c\u1ea7n \u0111\u1ebfn ch\u00fang \u0111\u00e3 ho\u00e0n th\u00e0nh (v\u00ed d\u1ee5, sau khi x\u00e1c nh\u1eadn b\u1ea3n c\u1eadp nh\u1eadt \u0111\u00e3 \u1ed5n \u0111\u1ecbnh).<\/li>\n<li><strong>\u0110\u1eb7t t\u00ean r\u00f5 r\u00e0ng, c\u00f3 m\u00f4 t\u1ea3:<\/strong> \u0110\u1eebng bao gi\u1edd \u0111\u1eb7t t\u00ean snapshot m\u1ed9t c\u00e1ch chung chung. H\u00e3y \u0111\u1eb7t t\u00ean bao g\u1ed3m th\u00f4ng tin v\u1ec1 l\u00fd do t\u1ea1o, ng\u00e0y gi\u1edd, v\u00ed d\u1ee5: &#8220;Truoc_khi_nang_cap_PHP_8.1_20251111&#8221;.<\/li>\n<li><strong>Tr\u00e1nh t\u1ea1o chu\u1ed7i snapshot qu\u00e1 d\u00e0i:<\/strong> M\u1ed9t m\u00e1y \u1ea3o c\u00f3 qu\u00e1 nhi\u1ec1u snapshot n\u1ed1i ti\u1ebfp nhau s\u1ebd b\u1ecb suy gi\u1ea3m hi\u1ec7u n\u0103ng \u0111\u00e1ng k\u1ec3. C\u1ed1 g\u1eafng gi\u1eef chu\u1ed7i snapshot c\u00e0ng ng\u1eafn c\u00e0ng t\u1ed1t.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Chinh-sach-luu-tru-va-don-dep-snapshot-dinh-ky\"><\/span>Ch\u00ednh s\u00e1ch l\u01b0u tr\u1eef v\u00e0 d\u1ecdn d\u1eb9p snapshot \u0111\u1ecbnh k\u1ef3<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>H\u00e3y x\u00e2y d\u1ef1ng m\u1ed9t quy tr\u00ecnh, d\u00f9 l\u00e0 t\u1ef1 \u0111\u1ed9ng hay th\u1ee7 c\u00f4ng, \u0111\u1ec3 ki\u1ec3m tra v\u00e0 x\u00f3a c\u00e1c snapshot c\u0169 kh\u00f4ng c\u00f2n c\u1ea7n thi\u1ebft. Nhi\u1ec1u h\u1ec7 th\u1ed1ng cho ph\u00e9p thi\u1ebft l\u1eadp c\u1ea3nh b\u00e1o khi m\u1ed9t snapshot \u0111\u00e3 t\u1ed3n t\u1ea1i qu\u00e1 m\u1ed9t kho\u1ea3ng th\u1eddi gian nh\u1ea5t \u0111\u1ecbnh (v\u00ed d\u1ee5: 72 gi\u1edd), nh\u1eafc nh\u1edf ng\u01b0\u1eddi qu\u1ea3n tr\u1ecb ki\u1ec3m tra l\u1ea1i.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Canh-bao-khi-su-dung-snapshot-sai-cach\"><\/span>C\u1ea3nh b\u00e1o khi s\u1eed d\u1ee5ng snapshot sai c\u00e1ch<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>M\u1ed9t l\u1ea7n n\u1eefa c\u1ea7n nh\u1ea5n m\u1ea1nh: <strong>Snapshot kh\u00f4ng ph\u1ea3i l\u00e0 backup.<\/strong> \u0110\u1eebng bao gi\u1edd d\u1ef1a v\u00e0o snapshot nh\u01b0 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p b\u1ea3o v\u1ec7 d\u1eef li\u1ec7u duy nh\u1ea5t. M\u1ed9t chi\u1ebfn l\u01b0\u1ee3c b\u1ea3o v\u1ec7 d\u1eef li\u1ec7u t\u1ed1t lu\u00f4n bao g\u1ed3m c\u00e1c b\u1ea3n sao l\u01b0u (backup) \u0111\u1ecbnh k\u1ef3, \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef tr\u00ean m\u1ed9t h\u1ec7 th\u1ed1ng \u0111\u1ed9c l\u1eadp, th\u1eadm ch\u00ed \u1edf m\u1ed9t \u0111\u1ecba \u0111i\u1ec3m kh\u00e1c.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Snapshot-trong-moi-truong-Cloud-VPS\"><\/span>Snapshot trong m\u00f4i tr\u01b0\u1eddng Cloud &amp; VPS<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0110\u1ed1i v\u1edbi ng\u01b0\u1eddi d\u00f9ng d\u1ecbch v\u1ee5 Cloud Server v\u00e0 VPS, t\u00ednh n\u0103ng snapshot mang l\u1ea1i s\u1ef1 ti\u1ec7n l\u1ee3i v\u00e0 ch\u1ee7 \u0111\u1ed9ng r\u1ea5t l\u1edbn. C\u00e1c nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 nh\u01b0 InterData \u0111\u00e3 t\u00edch h\u1ee3p s\u00e2u c\u00f4ng c\u1ee5 n\u00e0y v\u00e0o h\u1ec7 th\u1ed1ng qu\u1ea3n tr\u1ecb c\u1ee7a m\u00ecnh.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Snapshot-tren-VPS-cua-InterData\"><\/span>Snapshot tr\u00ean VPS c\u1ee7a InterData<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>T\u1ea1i InterData, kh\u00e1ch h\u00e0ng s\u1eed d\u1ee5ng d\u1ecbch v\u1ee5 Cloud VPS c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng qu\u1ea3n l\u00fd snapshot th\u00f4ng qua giao di\u1ec7n \u0111i\u1ec1u khi\u1ec3n tr\u1ef1c quan. Ch\u1ec9 v\u1edbi v\u00e0i c\u00fa nh\u1ea5p chu\u1ed9t, b\u1ea1n c\u00f3 th\u1ec3 t\u1ea1o m\u1ed9t \u0111i\u1ec3m kh\u00f4i ph\u1ee5c an to\u00e0n cho to\u00e0n b\u1ed9 m\u00e1y ch\u1ee7 \u1ea3o c\u1ee7a m\u00ecnh. Qu\u00e1 tr\u00ecnh n\u00e0y di\u1ec5n ra nhanh ch\u00f3ng v\u00e0 kh\u00f4ng y\u00eau c\u1ea7u ki\u1ebfn th\u1ee9c k\u1ef9 thu\u1eadt ph\u1ee9c t\u1ea1p.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Dung-snapshot-khi-nang-cap-VPS-hoac-cai-dat-OS-moi\"><\/span>D\u00f9ng snapshot khi n\u00e2ng c\u1ea5p VPS ho\u1eb7c c\u00e0i \u0111\u1eb7t OS m\u1edbi<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>M\u1ed9t k\u1ecbch b\u1ea3n r\u1ea5t ph\u1ed5 bi\u1ebfn l\u00e0 khi b\u1ea1n mu\u1ed1n n\u00e2ng c\u1ea5p g\u00f3i t\u00e0i nguy\u00ean (CPU, RAM) cho VPS ho\u1eb7c c\u00e0i \u0111\u1eb7t l\u1ea1i m\u1ed9t h\u1ec7 \u0111i\u1ec1u h\u00e0nh kh\u00e1c. Tr\u01b0\u1edbc khi th\u1ef1c hi\u1ec7n, h\u00e3y t\u1ea1o m\u1ed9t snapshot. N\u1ebfu qu\u00e1 tr\u00ecnh n\u00e2ng c\u1ea5p g\u1eb7p s\u1ef1 c\u1ed1 ho\u1eb7c h\u1ec7 \u0111i\u1ec1u h\u00e0nh m\u1edbi kh\u00f4ng t\u01b0\u01a1ng th\u00edch v\u1edbi \u1ee9ng d\u1ee5ng, b\u1ea1n c\u00f3 th\u1ec3 ngay l\u1eadp t\u1ee9c kh\u00f4i ph\u1ee5c VPS v\u1ec1 tr\u1ea1ng th\u00e1i ban \u0111\u1ea7u v\u00e0 th\u1eed l\u1ea1i ph\u01b0\u01a1ng \u00e1n kh\u00e1c.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"So-sanh-snapshot-thu-cong-va-snapshot-tu-dong\"><\/span>So s\u00e1nh snapshot th\u1ee7 c\u00f4ng v\u00e0 snapshot t\u1ef1 \u0111\u1ed9ng<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Snapshot th\u1ee7 c\u00f4ng ph\u00f9 h\u1ee3p cho c\u00e1c t\u00e1c v\u1ee5 \u0111\u1ed9t xu\u1ea5t nh\u01b0 \u0111\u00e3 n\u00eau tr\u00ean. Tuy nhi\u00ean, nhi\u1ec1u nh\u00e0 cung c\u1ea5p, bao g\u1ed3m c\u1ea3 InterData, c\u00f2n cung c\u1ea5p t\u00f9y ch\u1ecdn snapshot t\u1ef1 \u0111\u1ed9ng. B\u1ea1n c\u00f3 th\u1ec3 l\u00ean l\u1ecbch \u0111\u1ec3 h\u1ec7 th\u1ed1ng t\u1ef1 \u0111\u1ed9ng t\u1ea1o snapshot h\u00e0ng ng\u00e0y ho\u1eb7c h\u00e0ng tu\u1ea7n. \u0110i\u1ec1u n\u00e0y \u0111\u1ea3m b\u1ea3o b\u1ea1n lu\u00f4n c\u00f3 m\u1ed9t \u0111i\u1ec3m kh\u00f4i ph\u1ee5c g\u1ea7n nh\u1ea5t m\u00e0 kh\u00f4ng c\u1ea7n ph\u1ea3i can thi\u1ec7p th\u1ee7 c\u00f4ng, ho\u1ea1t \u0111\u1ed9ng t\u01b0\u01a1ng t\u1ef1 nh\u01b0 m\u1ed9t l\u1edbp b\u1ea3o v\u1ec7 b\u1ed5 sung b\u00ean c\u1ea1nh backup.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Ket-luan\"><\/span>K\u1ebft lu\u1eadn<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Snapshot l\u00e0 m\u1ed9t c\u00f4ng ngh\u1ec7 v\u00f4 c\u00f9ng h\u1eefu \u00edch, mang l\u1ea1i kh\u1ea3 n\u0103ng ph\u1ee5c h\u1ed3i h\u1ec7 th\u1ed1ng nhanh ch\u00f3ng v\u00e0 s\u1ef1 linh ho\u1ea1t trong qu\u1ea3n tr\u1ecb. \u0110\u00e2y l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 kh\u00f4ng th\u1ec3 thi\u1ebfu \u0111\u1ed1i v\u1edbi qu\u1ea3n tr\u1ecb vi\u00ean h\u1ec7 th\u1ed1ng, nh\u00e0 ph\u00e1t tri\u1ec3n ph\u1ea7n m\u1ec1m, v\u00e0 b\u1ea5t k\u1ef3 ai \u0111ang v\u1eadn h\u00e0nh c\u00e1c d\u1ecbch v\u1ee5 tr\u00ean n\u1ec1n t\u1ea3ng \u1ea3o h\u00f3a v\u00e0 \u0111\u00e1m m\u00e2y.<\/p>\n<p>Tuy nhi\u00ean, \u0111\u1ec3 khai th\u00e1c t\u1ed1i \u0111a s\u1ee9c m\u1ea1nh c\u1ee7a snapshot, ng\u01b0\u1eddi d\u00f9ng c\u1ea7n hi\u1ec3u r\u00f5 b\u1ea3n ch\u1ea5t, \u01b0u \u0111i\u1ec3m v\u00e0 c\u1ea3 nh\u1eefng h\u1ea1n ch\u1ebf c\u1ee7a n\u00f3. \u0110i\u1ec1u quan tr\u1ecdng nh\u1ea5t l\u00e0 ph\u1ea3i nh\u1eadn th\u1ee9c r\u1eb1ng snapshot kh\u00f4ng th\u1ec3 thay th\u1ebf cho m\u1ed9t chi\u1ebfn l\u01b0\u1ee3c sao l\u01b0u d\u1eef li\u1ec7u (backup) to\u00e0n di\u1ec7n.<\/p>\n<p>B\u1eb1ng c\u00e1ch k\u1ebft h\u1ee3p th\u00f4ng minh gi\u1eefa vi\u1ec7c s\u1eed d\u1ee5ng snapshot cho c\u00e1c nhu c\u1ea7u ph\u1ee5c h\u1ed3i t\u1ee9c th\u1eddi v\u00e0 duy tr\u00ec c\u00e1c b\u1ea3n sao l\u01b0u \u0111\u1ecbnh k\u1ef3 \u0111\u1ec3 b\u1ea3o v\u1ec7 d\u00e0i h\u1ea1n, nh\u01b0 c\u00e1c gi\u1ea3i ph\u00e1p VPS, Cloud VPS m\u00e0 InterData \u0111ang cung c\u1ea5p, b\u1ea1n c\u00f3 th\u1ec3 x\u00e2y d\u1ef1ng m\u1ed9t h\u1ec7 th\u1ed1ng b\u1ea3o v\u1ec7 d\u1eef li\u1ec7u v\u1eefng ch\u1eafc, s\u1eb5n s\u00e0ng \u1ee9ng ph\u00f3 v\u1edbi m\u1ecdi t\u00ecnh hu\u1ed1ng.<\/p>\n<div class=\"cta-section\">\n<p><span style=\"font-size: 130%;\"><strong>C\u1ea7n t\u01b0 v\u1ea5n d\u1ecbch v\u1ee5 VPS\/Cloud Server? Li\u00ean h\u1ec7 InterData ngay<\/strong><\/span><\/p>\n<p>B\u1ea1n \u0111ang t\u00ecm ki\u1ebfm m\u1ed9t gi\u1ea3i ph\u00e1p <a href=\"https:\/\/interdata.vn\/thue-vps\/\"><strong>M\u00e1y ch\u1ee7 ri\u00eang \u1ea3o (VPS)<\/strong><\/a> ho\u1eb7c <a href=\"https:\/\/interdata.vn\/cloud-server\/\"><strong>M\u00e1y ch\u1ee7 \u0111\u00e1m m\u00e2y (Cloud Server)<\/strong><\/a> \u1ed5n \u0111\u1ecbnh, hi\u1ec7u n\u0103ng cao v\u00e0 \u0111\u01b0\u1ee3c t\u00edch h\u1ee3p s\u1eb5n t\u00ednh n\u0103ng Snapshot m\u1ea1nh m\u1ebd? T\u1ea1i InterData, ch\u00fang t\u00f4i h\u1ed7 tr\u1ee3 snapshot th\u01b0\u1eddng xuy\u00ean, gi\u00fap b\u1ea1n an t\u00e2m tri\u1ec3n khai d\u1ef1 \u00e1n v\u00e0 b\u1ea3o v\u1ec7 d\u1eef li\u1ec7u ch\u1ec9 v\u1edbi m\u1ed9t c\u00fa nh\u1ea5p chu\u1ed9t.<\/p>\n<p><strong>Website:<\/strong> <a href=\"https:\/\/interdata.vn\/\">https:\/\/interdata.vn\/<\/a><\/p>\n<p><strong>Hotline:<\/strong> <a href=\"tel:1900636822\">1900 636822<\/a><\/p>\n<p><strong>Fanpage:<\/strong> <a href=\"https:\/\/facebook.com\/interdata.com.vn\" target=\"_blank\" rel=\"nofollow noopener\">https:\/\/facebook.com\/interdata.com.vn<\/a><\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Trong qu\u1ea3n tr\u1ecb h\u1ec7 th\u1ed1ng v\u00e0 l\u01b0u tr\u1eef d\u1eef li\u1ec7u, &#8220;Snapshot&#8221; l\u00e0 m\u1ed9t thu\u1eadt ng\u1eef c\u1ef1c k\u1ef3 quan tr\u1ecdng nh\u01b0ng kh\u00f4ng ph\u1ea3i ai c\u0169ng hi\u1ec3u r\u00f5. V\u1eady Snapshot l\u00e0 g\u00ec v\u00e0 t\u1ea1i sao \u0111\u00e2y l\u1ea1i l\u00e0 c\u00f4ng c\u1ee5 kh\u00f4ng th\u1ec3 thi\u1ebfu \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o an to\u00e0n d\u1eef li\u1ec7u? B\u00e0i vi\u1ebft n\u00e0y c\u1ee7a InterData s\u1ebd gi\u1ea3i<\/p>\n","protected":false},"author":2,"featured_media":35924,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[49],"tags":[],"class_list":["post-35808","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-vps"],"_links":{"self":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/35808","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=35808"}],"version-history":[{"count":12,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/35808\/revisions"}],"predecessor-version":[{"id":38460,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/35808\/revisions\/38460"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/media\/35924"}],"wp:attachment":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/media?parent=35808"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/categories?post=35808"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/tags?post=35808"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}