{"id":31102,"date":"2025-06-28T10:06:14","date_gmt":"2025-06-28T03:06:14","guid":{"rendered":"https:\/\/interdata.vn\/blog\/?p=31102"},"modified":"2025-06-28T13:36:21","modified_gmt":"2025-06-28T06:36:21","slug":"openvz-va-kvm","status":"publish","type":"post","link":"https:\/\/interdata.vn\/blog\/openvz-va-kvm\/","title":{"rendered":"OpenVZ v\u00e0 KVM: C\u00f4ng ngh\u1ec7 \u1ea3o h\u00f3a VPS n\u00e0o t\u1ed1t h\u01a1n?"},"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\/openvz-va-kvm\/#Tong-quan-ve-cong-nghe-ao-hoa-VPS\" >T\u1ed5ng quan v\u1ec1 c\u00f4ng ngh\u1ec7 \u1ea3o h\u00f3a VPS<\/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\/openvz-va-kvm\/#Cong-nghe-ao-hoa-la-gi\" >C\u00f4ng ngh\u1ec7 \u1ea3o h\u00f3a 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-3\" href=\"https:\/\/interdata.vn\/blog\/openvz-va-kvm\/#Tai-sao-can-chon-dung-cong-nghe-khi-dung-VPS\" >T\u1ea1i sao c\u1ea7n ch\u1ecdn \u0111\u00fang c\u00f4ng ngh\u1ec7 khi d\u00f9ng VPS?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/interdata.vn\/blog\/openvz-va-kvm\/#OpenVZ-la-gi\" >OpenVZ 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-5\" href=\"https:\/\/interdata.vn\/blog\/openvz-va-kvm\/#Cach-hoat-dong-cua-OpenVZ\" >C\u00e1ch ho\u1ea1t \u0111\u1ed9ng c\u1ee7a OpenVZ<\/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\/openvz-va-kvm\/#Uu-diem-va-nhuoc-diem-cua-OpenVZ\" >\u01afu \u0111i\u1ec3m v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a OpenVZ<\/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\/openvz-va-kvm\/#KVM-la-gi\" >KVM 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-8\" href=\"https:\/\/interdata.vn\/blog\/openvz-va-kvm\/#Co-che-hoat-dong-cua-KVM\" >C\u01a1 ch\u1ebf ho\u1ea1t \u0111\u1ed9ng c\u1ee7a KVM<\/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\/openvz-va-kvm\/#Uu-diem-va-nhuoc-diem-cua-KVM\" >\u01afu \u0111i\u1ec3m v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a KVM<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/interdata.vn\/blog\/openvz-va-kvm\/#So-sanh-OpenVZ-va-KVM\" >So s\u00e1nh OpenVZ v\u00e0 KVM<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/interdata.vn\/blog\/openvz-va-kvm\/#Hieu-nang-va-toc-do\" >Hi\u1ec7u n\u0103ng v\u00e0 t\u1ed1c \u0111\u1ed9<\/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\/openvz-va-kvm\/#Kha-nang-tuy-bien-va-cai-dat\" >Kh\u1ea3 n\u0103ng t\u00f9y bi\u1ebfn v\u00e0 c\u00e0i \u0111\u1eb7t<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/interdata.vn\/blog\/openvz-va-kvm\/#Do-bao-mat-va-cach-quan-ly-tai-nguyen\" >\u0110\u1ed9 b\u1ea3o m\u1eadt v\u00e0 c\u00e1ch qu\u1ea3n l\u00fd t\u00e0i nguy\u00ean<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/interdata.vn\/blog\/openvz-va-kvm\/#Chi-phi-va-tinh-linh-hoat\" >Chi ph\u00ed v\u00e0 t\u00ednh linh ho\u1ea1t<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/interdata.vn\/blog\/openvz-va-kvm\/#Nen-chon-OpenVZ-hay-KVM-cho-nhu-cau-cua-ban\" >N\u00ean ch\u1ecdn OpenVZ hay KVM cho nhu c\u1ea7u c\u1ee7a b\u1ea1n?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/interdata.vn\/blog\/openvz-va-kvm\/#Truong-hop-nen-dung-OpenVZ\" >Tr\u01b0\u1eddng h\u1ee3p n\u00ean d\u00f9ng OpenVZ<\/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\/openvz-va-kvm\/#Truong-hop-nen-dung-KVM\" >Tr\u01b0\u1eddng h\u1ee3p n\u00ean d\u00f9ng KVM<\/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\/openvz-va-kvm\/#Loi-ket\" >L\u1eddi k\u1ebft<\/a><\/li><\/ul><\/nav><\/div>\n<p>L\u1ef1a ch\u1ecdn c\u00f4ng ngh\u1ec7 \u1ea3o h\u00f3a VPS quy\u1ebft \u0111\u1ecbnh tr\u1ef1c ti\u1ebfp \u0111\u1ebfn hi\u1ec7u n\u0103ng, b\u1ea3o m\u1eadt v\u00e0 chi ph\u00ed cho d\u1ef1 \u00e1n c\u1ee7a b\u1ea1n. Vi\u1ec7c \u0111\u1ee9ng gi\u1eefa hai l\u1ef1a ch\u1ecdn ph\u1ed5 bi\u1ebfn l\u00e0 OpenVZ v\u00e0 KVM \u0111\u00f2i h\u1ecfi m\u1ed9t s\u1ef1 hi\u1ec3u bi\u1ebft s\u00e2u s\u1eafc v\u1ec1 b\u1ea3n ch\u1ea5t c\u1ee7a t\u1eebng c\u00f4ng ngh\u1ec7. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd ph\u00e2n t\u00edch chi ti\u1ebft, so s\u00e1nh tr\u1ef1c di\u1ec7n v\u00e0 cung c\u1ea5p c\u00e1c k\u1ecbch b\u1ea3n th\u1ef1c t\u1ebf \u0111\u1ec3 b\u1ea1n c\u00f3 th\u1ec3 t\u1ef1 tin ch\u1ecdn ra gi\u1ea3i ph\u00e1p ph\u00f9 h\u1ee3p nh\u1ea5t.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Tong-quan-ve-cong-nghe-ao-hoa-VPS\"><\/span>T\u1ed5ng quan v\u1ec1 c\u00f4ng ngh\u1ec7 \u1ea3o h\u00f3a VPS<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Tr\u01b0\u1edbc khi \u0111i s\u00e2u v\u00e0o so s\u00e1nh, ch\u00fang ta c\u1ea7n n\u1eafm v\u1eefng nh\u1eefng kh\u00e1i ni\u1ec7m n\u1ec1n t\u1ea3ng. Hi\u1ec3u r\u00f5 v\u1ec1 c\u00f4ng ngh\u1ec7 \u1ea3o h\u00f3a s\u1ebd gi\u00fap b\u1ea1n nh\u1eadn ra t\u1ea1i sao vi\u1ec7c l\u1ef1a ch\u1ecdn gi\u1eefa OpenVZ v\u00e0 KVM l\u1ea1i quan tr\u1ecdng \u0111\u1ebfn v\u1eady.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Cong-nghe-ao-hoa-la-gi\"><\/span>C\u00f4ng ngh\u1ec7 \u1ea3o h\u00f3a l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>C\u00f4ng ngh\u1ec7 \u1ea3o h\u00f3a l\u00e0 quy tr\u00ecnh s\u1eed d\u1ee5ng ph\u1ea7n m\u1ec1m \u0111\u1ec3 t\u1ea1o ra m\u1ed9t phi\u00ean b\u1ea3n \u1ea3o (virtual) c\u1ee7a m\u1ed9t t\u00e0i nguy\u00ean v\u1eadt l\u00fd, ch\u1eb3ng h\u1ea1n nh\u01b0 m\u00e1y ch\u1ee7, thi\u1ebft b\u1ecb l\u01b0u tr\u1eef, ho\u1eb7c m\u1ea1ng. \u0110\u1ed1i v\u1edbi VPS (Virtual Private Server), \u1ea3o h\u00f3a cho ph\u00e9p chia m\u1ed9t m\u00e1y ch\u1ee7 v\u1eadt l\u00fd m\u1ea1nh m\u1ebd th\u00e0nh nhi\u1ec1u m\u00e1y ch\u1ee7 \u1ea3o \u0111\u1ed9c l\u1eadp.<\/p>\n<p>M\u1ed7i VPS ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t m\u00e1y ch\u1ee7 ri\u00eang bi\u1ec7t v\u1edbi h\u1ec7 \u0111i\u1ec1u h\u00e0nh v\u00e0 t\u00e0i nguy\u00ean \u0111\u01b0\u1ee3c c\u1ea5p ph\u00e1t ri\u00eang. \u0110i\u1ec1u n\u00e0y cho ph\u00e9p nhi\u1ec1u ng\u01b0\u1eddi d\u00f9ng c\u00f9ng chia s\u1ebb t\u00e0i nguy\u00ean c\u1ee7a m\u1ed9t m\u00e1y ch\u1ee7 v\u1eadt l\u00fd m\u00e0 kh\u00f4ng \u1ea3nh h\u01b0\u1edfng l\u1eabn nhau, mang l\u1ea1i hi\u1ec7u qu\u1ea3 chi ph\u00ed v\u00e0 kh\u1ea3 n\u0103ng qu\u1ea3n l\u00fd linh ho\u1ea1t.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/05\/Ao-hoa-01.jpg\" alt=\"C\u00f4ng ngh\u1ec7 \u1ea3o h\u00f3a\" width=\"600\" height=\"338\" class=\"aligncenter wp-image-28025\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/05\/Ao-hoa-01.jpg 750w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/05\/Ao-hoa-01-300x169.jpg 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Tai-sao-can-chon-dung-cong-nghe-khi-dung-VPS\"><\/span>T\u1ea1i sao c\u1ea7n ch\u1ecdn \u0111\u00fang c\u00f4ng ngh\u1ec7 khi d\u00f9ng VPS?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Vi\u1ec7c ch\u1ecdn \u0111\u00fang c\u00f4ng ngh\u1ec7 \u1ea3o h\u00f3a kh\u00f4ng ch\u1ec9 l\u00e0 m\u1ed9t quy\u1ebft \u0111\u1ecbnh k\u1ef9 thu\u1eadt, m\u00e0 c\u00f2n \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn s\u1ef1 th\u00e0nh c\u00f4ng c\u1ee7a d\u1ef1 \u00e1n. M\u1ed9t c\u00f4ng ngh\u1ec7 ph\u00f9 h\u1ee3p s\u1ebd \u0111\u1ea3m b\u1ea3o hi\u1ec7u n\u0103ng \u1ed5n \u0111\u1ecbnh, \u0111\u00e1p \u1ee9ng \u0111\u01b0\u1ee3c c\u00e1c y\u00eau c\u1ea7u b\u1ea3o m\u1eadt kh\u1eaft khe v\u00e0 t\u1ed1i \u01b0u h\u00f3a chi ph\u00ed v\u1eadn h\u00e0nh.<\/p>\n<p>Ng\u01b0\u1ee3c l\u1ea1i, l\u1ef1a ch\u1ecdn sai c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn hi\u1ec7u su\u1ea5t k\u00e9m, c\u00e1c l\u1ed7 h\u1ed5ng b\u1ea3o m\u1eadt kh\u00f4ng \u0111\u00e1ng c\u00f3, ho\u1eb7c l\u00e3ng ph\u00ed ng\u00e2n s\u00e1ch cho nh\u1eefng t\u00e0i nguy\u00ean kh\u00f4ng c\u1ea7n thi\u1ebft. Do \u0111\u00f3, hi\u1ec3u r\u00f5 s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa OpenVZ v\u00e0 KVM l\u00e0 b\u01b0\u1edbc \u0111\u1ea7u ti\u00ean \u0111\u1ec3 x\u00e2y d\u1ef1ng m\u1ed9t h\u1ea1 t\u1ea7ng v\u1eefng ch\u1eafc.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"OpenVZ-la-gi\"><\/span>OpenVZ l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>OpenVZ l\u00e0 m\u1ed9t c\u00f4ng ngh\u1ec7 \u1ea3o h\u00f3a \u1edf c\u1ea5p \u0111\u1ed9 h\u1ec7 \u0111i\u1ec1u h\u00e0nh (OS-level virtualization), th\u01b0\u1eddng \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn v\u1edbi t\u00ean g\u1ecdi containerization. Thay v\u00ec t\u1ea1o ra m\u1ed9t m\u00e1y \u1ea3o ph\u1ea7n c\u1ee9ng ho\u00e0n ch\u1ec9nh, OpenVZ t\u1ea1o ra c\u00e1c &#8220;container&#8221; bi\u1ec7t l\u1eadp tr\u00ean c\u00f9ng m\u1ed9t h\u1ec7 \u0111i\u1ec1u h\u00e0nh ch\u1ee7. T\u1ea5t c\u1ea3 c\u00e1c container n\u00e0y \u0111\u1ec1u chia s\u1ebb chung m\u1ed9t nh\u00e2n (kernel) c\u1ee7a m\u00e1y ch\u1ee7 v\u1eadt l\u00fd \u0111\u00f3.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/06\/OpenVZ.jpg\" alt=\"OpenVZ\" width=\"600\" height=\"375\" class=\"aligncenter size-full wp-image-31106\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/06\/OpenVZ.jpg 600w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/06\/OpenVZ-300x188.jpg 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Cach-hoat-dong-cua-OpenVZ\"><\/span>C\u00e1ch ho\u1ea1t \u0111\u1ed9ng c\u1ee7a OpenVZ<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>OpenVZ ho\u1ea1t \u0111\u1ed9ng b\u1eb1ng c\u00e1ch ph\u00e2n v\u00f9ng t\u00e0i nguy\u00ean c\u1ee7a h\u1ec7 \u0111i\u1ec1u h\u00e0nh Linux ch\u1ee7. M\u1ed7i container c\u00f3 h\u1ec7 th\u1ed1ng t\u1ec7p tin, danh s\u00e1ch ng\u01b0\u1eddi d\u00f9ng, ti\u1ebfn tr\u00ecnh v\u00e0 b\u1ed9 nh\u1edb ri\u00eang, nh\u01b0ng ch\u00fang c\u00f9ng s\u1eed d\u1ee5ng chung m\u1ed9t kernel duy nh\u1ea5t t\u1eeb m\u00e1y ch\u1ee7 g\u1ed1c. \u0110i\u1ec1u n\u00e0y l\u00e0m cho c\u00e1c container OpenVZ tr\u1edf n\u00ean c\u1ef1c k\u1ef3 nh\u1eb9 v\u00e0 kh\u1edfi \u0111\u1ed9ng g\u1ea7n nh\u01b0 t\u1ee9c th\u00ec.<\/p>\n<p>V\u00ed d\u1ee5, tr\u00ean m\u1ed9t m\u00e1y ch\u1ee7 v\u1eadt l\u00fd ch\u1ea1y CentOS 7 v\u1edbi kernel Linux 3.10, t\u1ea5t c\u1ea3 c\u00e1c VPS OpenVZ \u0111\u01b0\u1ee3c t\u1ea1o ra c\u0169ng s\u1ebd ch\u1ea1y tr\u00ean ch\u00ednh kernel 3.10 \u0111\u00f3. B\u1ea1n kh\u00f4ng th\u1ec3 n\u00e2ng c\u1ea5p kernel cho m\u1ed9t VPS ri\u00eang l\u1ebb m\u00e0 ph\u1ea3i ph\u1ee5 thu\u1ed9c ho\u00e0n to\u00e0n v\u00e0o m\u00e1y ch\u1ee7 ch\u1ee7.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Uu-diem-va-nhuoc-diem-cua-OpenVZ\"><\/span>\u01afu \u0111i\u1ec3m v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a OpenVZ<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>M\u1ed7i c\u00f4ng ngh\u1ec7 \u0111\u1ec1u c\u00f3 hai m\u1eb7t v\u00e0 OpenVZ c\u0169ng kh\u00f4ng ngo\u1ea1i l\u1ec7.<\/p>\n<p><strong>\u01afu \u0111i\u1ec3m:<\/strong><\/p>\n<ul>\n<li><strong>Hi\u1ec7u su\u1ea5t cao:<\/strong> Do c\u00f3 \u00edt l\u1edbp \u1ea3o h\u00f3a (overhead th\u1ea5p), OpenVZ mang l\u1ea1i hi\u1ec7u su\u1ea5t g\u1ea7n v\u1edbi m\u00e1y ch\u1ee7 v\u1eadt l\u00fd, \u0111\u1eb7c bi\u1ec7t v\u1edbi c\u00e1c t\u00e1c v\u1ee5 I\/O (\u0111\u1ecdc\/ghi d\u1eef li\u1ec7u).<\/li>\n<li><strong>Ti\u1ebft ki\u1ec7m t\u00e0i nguy\u00ean:<\/strong> Vi\u1ec7c d\u00f9ng chung kernel gi\u00fap ti\u1ebft ki\u1ec7m \u0111\u00e1ng k\u1ec3 RAM v\u00e0 dung l\u01b0\u1ee3ng \u0111\u0129a, cho ph\u00e9p nh\u00e0 cung c\u1ea5p t\u1ea1o ra nhi\u1ec1u VPS h\u01a1n tr\u00ean c\u00f9ng m\u1ed9t ph\u1ea7n c\u1ee9ng.<\/li>\n<li><strong>Chi ph\u00ed th\u1ea5p:<\/strong> Nh\u1edd kh\u1ea3 n\u0103ng t\u1ed1i \u01b0u t\u00e0i nguy\u00ean, c\u00e1c g\u00f3i VPS OpenVZ th\u01b0\u1eddng c\u00f3 gi\u00e1 th\u00e0nh r\u1ea5t c\u1ea1nh tranh, ph\u00f9 h\u1ee3p v\u1edbi ng\u01b0\u1eddi d\u00f9ng c\u00f3 ng\u00e2n s\u00e1ch h\u1ea1n ch\u1ebf.<\/li>\n<li><strong>Qu\u1ea3n l\u00fd d\u1ec5 d\u00e0ng:<\/strong> Vi\u1ec7c t\u1ea1o, sao l\u01b0u v\u00e0 di chuy\u1ec3n container di\u1ec5n ra nhanh ch\u00f3ng.<\/li>\n<\/ul>\n<p><strong>Nh\u01b0\u1ee3c \u0111i\u1ec3m:<\/strong><\/p>\n<ul>\n<li><strong>Ch\u1ec9 h\u1ed7 tr\u1ee3 Linux:<\/strong> V\u00ec chia s\u1ebb kernel Linux, OpenVZ kh\u00f4ng th\u1ec3 ch\u1ea1y c\u00e1c h\u1ec7 \u0111i\u1ec1u h\u00e0nh kh\u00e1c nh\u01b0 Windows hay BSD.<\/li>\n<li><strong>M\u1ee9c \u0111\u1ed9 c\u00f4 l\u1eadp th\u1ea5p:<\/strong> Vi\u1ec7c d\u00f9ng chung kernel t\u1ea1o ra m\u1ed9t \u0111i\u1ec3m y\u1ebfu ti\u1ec1m t\u00e0ng. N\u1ebfu kernel c\u1ee7a m\u00e1y ch\u1ee7 ch\u1ee7 g\u1eb7p l\u1ed7i ho\u1eb7c b\u1ecb t\u1ea5n c\u00f4ng, t\u1ea5t c\u1ea3 c\u00e1c container \u0111\u1ec1u c\u00f3 nguy c\u01a1 b\u1ecb \u1ea3nh h\u01b0\u1edfng.<\/li>\n<li><strong>R\u1ee7i ro &#8220;Overselling&#8221;:<\/strong> M\u1ed9t s\u1ed1 nh\u00e0 cung c\u1ea5p c\u00f3 th\u1ec3 b\u00e1n t\u00e0i nguy\u00ean (\u0111\u1eb7c bi\u1ec7t l\u00e0 RAM) nhi\u1ec1u h\u01a1n so v\u1edbi t\u00e0i nguy\u00ean v\u1eadt l\u00fd c\u00f3 s\u1eb5n. \u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn t\u00ecnh tr\u1ea1ng &#8220;h\u00e0ng x\u00f3m \u1ed3n \u00e0o&#8221; (Noisy Neighbor), khi m\u1ed9t VPS d\u00f9ng qu\u00e1 nhi\u1ec1u t\u00e0i nguy\u00ean l\u00e0m \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e1c VPS kh\u00e1c.<\/li>\n<li><strong>H\u1ea1n ch\u1ebf t\u00f9y ch\u1ec9nh kernel:<\/strong> B\u1ea1n kh\u00f4ng th\u1ec3 thay \u0111\u1ed5i phi\u00ean b\u1ea3n kernel ho\u1eb7c c\u00e0i \u0111\u1eb7t c\u00e1c module kernel t\u00f9y ch\u1ec9nh cho VPS c\u1ee7a m\u00ecnh.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"KVM-la-gi\"><\/span>KVM l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>KVM, vi\u1ebft t\u1eaft c\u1ee7a <strong>Kernel-based Virtual Machine<\/strong>, l\u00e0 m\u1ed9t c\u00f4ng ngh\u1ec7 \u1ea3o h\u00f3a ph\u1ea7n c\u1ee9ng th\u1ef1c s\u1ef1 (true hardware virtualization) \u0111\u01b0\u1ee3c t\u00edch h\u1ee3p tr\u1ef1c ti\u1ebfp v\u00e0o nh\u00e2n Linux. C\u00f4ng ngh\u1ec7 n\u00e0y bi\u1ebfn nh\u00e2n Linux th\u00e0nh m\u1ed9t hypervisor lo\u1ea1i 1 (bare-metal hypervisor), cho ph\u00e9p t\u1ea1o ra c\u00e1c m\u00e1y \u1ea3o ho\u00e0n to\u00e0n \u0111\u1ed9c l\u1eadp v\u1edbi ph\u1ea7n c\u1ee9ng \u1ea3o h\u00f3a ri\u00eang.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/06\/KVM.jpg\" alt=\"KVM\" width=\"600\" height=\"337\" class=\"aligncenter size-full wp-image-31105\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/06\/KVM.jpg 600w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/06\/KVM-300x169.jpg 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Co-che-hoat-dong-cua-KVM\"><\/span>C\u01a1 ch\u1ebf ho\u1ea1t \u0111\u1ed9ng c\u1ee7a KVM<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>KVM t\u1eadn d\u1ee5ng s\u1ee9c m\u1ea1nh c\u1ee7a c\u00e1c ph\u1ea7n m\u1edf r\u1ed9ng \u1ea3o h\u00f3a \u0111\u01b0\u1ee3c t\u00edch h\u1ee3p s\u1eb5n trong c\u00e1c CPU hi\u1ec7n \u0111\u1ea1i, bao g\u1ed3m <strong>Intel VT-x<\/strong> v\u00e0 <strong>AMD-V<\/strong>. Khi b\u1ea1n t\u1ea1o m\u1ed9t m\u00e1y \u1ea3o KVM, h\u1ec7 th\u1ed1ng s\u1ebd c\u1ea5p ph\u00e1t m\u1ed9t b\u1ed9 ph\u1ea7n c\u1ee9ng \u1ea3o ho\u00e0n ch\u1ec9nh: CPU \u1ea3o, RAM, \u1ed5 \u0111\u0129a, card m\u1ea1ng v\u00e0 c\u00e1c thi\u1ebft b\u1ecb kh\u00e1c.<\/p>\n<p>M\u1ed7i m\u00e1y \u1ea3o KVM ch\u1ea1y m\u1ed9t kernel ri\u00eang v\u00e0 ho\u1ea1t \u0111\u1ed9ng ho\u00e0n to\u00e0n \u0111\u1ed9c l\u1eadp v\u1edbi m\u00e1y ch\u1ee7 ch\u1ee7 c\u0169ng nh\u01b0 c\u00e1c m\u00e1y \u1ea3o kh\u00e1c. \u0110i\u1ec1u n\u00e0y cho ph\u00e9p b\u1ea1n c\u00e0i \u0111\u1eb7t b\u1ea5t k\u1ef3 h\u1ec7 \u0111i\u1ec1u h\u00e0nh n\u00e0o, t\u1eeb c\u00e1c b\u1ea3n ph\u00e2n ph\u1ed1i Linux kh\u00e1c nhau cho \u0111\u1ebfn Windows Server, Windows 10, ho\u1eb7c th\u1eadm ch\u00ed c\u1ea3 macOS.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Uu-diem-va-nhuoc-diem-cua-KVM\"><\/span>\u01afu \u0111i\u1ec3m v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a KVM<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>S\u1ef1 \u0111\u1ed9c l\u1eadp ho\u00e0n to\u00e0n mang l\u1ea1i cho KVM nhi\u1ec1u l\u1ee3i th\u1ebf m\u1ea1nh m\u1ebd, nh\u01b0ng c\u0169ng \u0111i k\u00e8m m\u1ed9t v\u00e0i \u0111\u00e1nh \u0111\u1ed5i.<\/p>\n<p><strong>\u01afu \u0111i\u1ec3m:<\/strong><\/p>\n<ul>\n<li><strong>M\u1ee9c \u0111\u1ed9 c\u00f4 l\u1eadp tuy\u1ec7t \u0111\u1ed1i:<\/strong> M\u1ed7i m\u00e1y \u1ea3o KVM l\u00e0 m\u1ed9t th\u1ef1c th\u1ec3 ri\u00eang bi\u1ec7t. Ho\u1ea1t \u0111\u1ed9ng c\u1ee7a m\u1ed9t m\u00e1y \u1ea3o kh\u00f4ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e1c m\u00e1y \u1ea3o kh\u00e1c, lo\u1ea1i b\u1ecf ho\u00e0n to\u00e0n v\u1ea5n \u0111\u1ec1 &#8220;h\u00e0ng x\u00f3m \u1ed3n \u00e0o&#8221;.<\/li>\n<li><strong>B\u1ea3o m\u1eadt v\u01b0\u1ee3t tr\u1ed9i:<\/strong> S\u1ef1 c\u00e1ch ly ho\u00e0n to\u00e0n gi\u00fap t\u0103ng c\u01b0\u1eddng b\u1ea3o m\u1eadt. M\u1ed9t l\u1ed7 h\u1ed5ng tr\u00ean m\u1ed9t m\u00e1y \u1ea3o s\u1ebd kh\u00f4ng th\u1ec3 l\u00e2y lan sang m\u00e1y ch\u1ee7 ch\u1ee7 ho\u1eb7c c\u00e1c m\u00e1y \u1ea3o kh\u00e1c.<\/li>\n<li><strong>Linh ho\u1ea1t t\u1ed1i \u0111a:<\/strong> H\u1ed7 tr\u1ee3 c\u00e0i \u0111\u1eb7t h\u1ea7u h\u1ebft m\u1ecdi h\u1ec7 \u0111i\u1ec1u h\u00e0nh. B\u1ea1n c\u00f3 to\u00e0n quy\u1ec1n truy c\u1eadp v\u00e0 t\u00f9y ch\u1ec9nh kernel, c\u00e0i \u0111\u1eb7t c\u00e1c module v\u00e0 ph\u1ea7n m\u1ec1m chuy\u00ean d\u1ee5ng.<\/li>\n<li><strong>T\u00e0i nguy\u00ean \u0111\u01b0\u1ee3c \u0111\u1ea3m b\u1ea3o:<\/strong> C\u00e1c t\u00e0i nguy\u00ean nh\u01b0 RAM v\u00e0 CPU \u0111\u01b0\u1ee3c c\u1ea5p ph\u00e1t ri\u00eang cho t\u1eebng m\u00e1y \u1ea3o. Khi b\u1ea1n mua m\u1ed9t g\u00f3i VPS KVM v\u1edbi 2GB RAM, b\u1ea1n th\u1ef1c s\u1ef1 nh\u1eadn \u0111\u01b0\u1ee3c 2GB RAM \u0111\u1ec3 s\u1eed d\u1ee5ng.<\/li>\n<\/ul>\n<p><strong>Nh\u01b0\u1ee3c \u0111i\u1ec3m:<\/strong><\/p>\n<ul>\n<li><strong>T\u1ed1n nhi\u1ec1u t\u00e0i nguy\u00ean h\u01a1n:<\/strong> M\u1ed7i m\u00e1y \u1ea3o c\u1ea7n m\u1ed9t b\u1ea3n sao kernel v\u00e0 h\u1ec7 \u0111i\u1ec1u h\u00e0nh ri\u00eang, do \u0111\u00f3 ti\u00eau t\u1ed1n nhi\u1ec1u RAM v\u00e0 dung l\u01b0\u1ee3ng \u0111\u0129a h\u01a1n so v\u1edbi OpenVZ.<\/li>\n<li><strong>Chi ph\u00ed cao h\u01a1n:<\/strong> Do y\u00eau c\u1ea7u nhi\u1ec1u t\u00e0i nguy\u00ean ph\u1ea7n c\u1ee9ng h\u01a1n cho m\u1ed7i m\u00e1y \u1ea3o, chi ph\u00ed c\u1ee7a c\u00e1c g\u00f3i VPS KVM th\u01b0\u1eddng cao h\u01a1n so v\u1edbi OpenVZ.<\/li>\n<li><strong>Overhead cao h\u01a1n m\u1ed9t ch\u00fat:<\/strong> L\u1edbp \u1ea3o h\u00f3a ph\u1ea7n c\u1ee9ng \u0111\u1ea7y \u0111\u1ee7 t\u1ea1o ra m\u1ed9t l\u01b0\u1ee3ng overhead nh\u1ecf, d\u00f9 \u0111i\u1ec1u n\u00e0y \u0111\u00e3 \u0111\u01b0\u1ee3c t\u1ed1i \u01b0u \u0111\u00e1ng k\u1ec3 tr\u00ean c\u00e1c CPU hi\u1ec7n \u0111\u1ea1i.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"So-sanh-OpenVZ-va-KVM\"><\/span>So s\u00e1nh OpenVZ v\u00e0 KVM<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0110\u1ec3 gi\u00fap b\u1ea1n c\u00f3 c\u00e1i nh\u00ecn tr\u1ef1c quan, InterData \u0111\u00e3 t\u1ed5ng h\u1ee3p c\u00e1c \u0111i\u1ec3m kh\u00e1c bi\u1ec7t ch\u00ednh v\u00e0o b\u1ea3ng d\u01b0\u1edbi \u0111\u00e2y:<\/p>\n<table style=\"width: 100%; border-collapse: collapse; color: black;\">\n<thead>\n<tr style=\"background-color: blue; color: white;\">\n<th style=\"border: 1px solid darkgray; padding: 8px;\"><span style=\"color: #ffffff;\">Ti\u00eau ch\u00ed<\/span><\/th>\n<th style=\"border: 1px solid darkgray; padding: 8px;\"><span style=\"color: #ffffff;\">OpenVZ<\/span><\/th>\n<th style=\"border: 1px solid darkgray; padding: 8px;\"><span style=\"color: #ffffff;\">KVM (Kernel-based Virtual Machine)<\/span><\/th>\n<\/tr>\n<\/thead>\n<tbody style=\"background-color: white;\">\n<tr>\n<td style=\"border: 1px solid darkgray; padding: 8px;\">Lo\u1ea1i \u1ea3o h\u00f3a<\/td>\n<td style=\"border: 1px solid darkgray; padding: 8px;\">C\u1ea5p \u0111\u1ed9 h\u1ec7 \u0111i\u1ec1u h\u00e0nh (Container)<\/td>\n<td style=\"border: 1px solid darkgray; padding: 8px;\">\u1ea2o h\u00f3a ph\u1ea7n c\u1ee9ng (Full Virtualization)<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid darkgray; padding: 8px;\">Chia s\u1ebb Kernel<\/td>\n<td style=\"border: 1px solid darkgray; padding: 8px;\">D\u00f9ng chung kernel c\u1ee7a m\u00e1y ch\u1ee7 ch\u1ee7<\/td>\n<td style=\"border: 1px solid darkgray; padding: 8px;\">M\u1ed7i VPS c\u00f3 kernel ri\u00eang<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid darkgray; padding: 8px;\">H\u1ec7 \u0111i\u1ec1u h\u00e0nh<\/td>\n<td style=\"border: 1px solid darkgray; padding: 8px;\">Ch\u1ec9 h\u1ed7 tr\u1ee3 Linux<\/td>\n<td style=\"border: 1px solid darkgray; padding: 8px;\">Linux, Windows, BSD, v\u00e0 c\u00e1c OS kh\u00e1c<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid darkgray; padding: 8px;\">T\u00e0i nguy\u00ean<\/td>\n<td style=\"border: 1px solid darkgray; padding: 8px;\">D\u00f9ng chung, c\u00f3 th\u1ec3 &#8220;burst&#8221; (linh ho\u1ea1t)<\/td>\n<td style=\"border: 1px solid darkgray; padding: 8px;\">C\u1ea5p ph\u00e1t ri\u00eang, \u0111\u01b0\u1ee3c \u0111\u1ea3m b\u1ea3o<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid darkgray; padding: 8px;\">M\u1ee9c \u0111\u1ed9 c\u00f4 l\u1eadp<\/td>\n<td style=\"border: 1px solid darkgray; padding: 8px;\">Th\u1ea5p<\/td>\n<td style=\"border: 1px solid darkgray; padding: 8px;\">Cao<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid darkgray; padding: 8px;\">B\u1ea3o m\u1eadt<\/td>\n<td style=\"border: 1px solid darkgray; padding: 8px;\">Trung b\u00ecnh<\/td>\n<td style=\"border: 1px solid darkgray; padding: 8px;\">Cao<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid darkgray; padding: 8px;\">Hi\u1ec7u n\u0103ng<\/td>\n<td style=\"border: 1px solid darkgray; padding: 8px;\">Overhead th\u1ea5p, nhanh v\u1edbi t\u00e1c v\u1ee5 nh\u1eb9<\/td>\n<td style=\"border: 1px solid darkgray; padding: 8px;\">\u1ed4n \u0111\u1ecbnh, t\u1ed1t cho t\u1ea3i n\u1eb7ng v\u00e0 d\u00e0i h\u1ea1n<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid darkgray; padding: 8px;\">T\u00f9y ch\u1ec9nh<\/td>\n<td style=\"border: 1px solid darkgray; padding: 8px;\">H\u1ea1n ch\u1ebf, kh\u00f4ng th\u1ec3 \u0111\u1ed5i kernel<\/td>\n<td style=\"border: 1px solid darkgray; padding: 8px;\">To\u00e0n quy\u1ec1n, c\u00f3 th\u1ec3 t\u00f9y ch\u1ec9nh kernel<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid darkgray; padding: 8px;\">Chi ph\u00ed<\/td>\n<td style=\"border: 1px solid darkgray; padding: 8px;\">Th\u1ea5p h\u01a1n<\/td>\n<td style=\"border: 1px solid darkgray; padding: 8px;\">Cao h\u01a1n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3><span class=\"ez-toc-section\" id=\"Hieu-nang-va-toc-do\"><\/span>Hi\u1ec7u n\u0103ng v\u00e0 t\u1ed1c \u0111\u1ed9<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>V\u1ec1 m\u1eb7t l\u00fd thuy\u1ebft, OpenVZ c\u00f3 th\u1ec3 nhanh h\u01a1n m\u1ed9t ch\u00fat do c\u00f3 overhead th\u1ea5p. V\u00ec c\u00e1c container truy c\u1eadp tr\u1ef1c ti\u1ebfp v\u00e0o kernel c\u1ee7a m\u00e1y ch\u1ee7 ch\u1ee7 m\u00e0 kh\u00f4ng c\u1ea7n qua l\u1edbp bi\u00ean d\u1ecbch ph\u1ea7n c\u1ee9ng, \u0111\u1ed9 tr\u1ec5 \u0111\u01b0\u1ee3c gi\u1ea3m thi\u1ec3u. Tuy nhi\u00ean, hi\u1ec7u su\u1ea5t n\u00e0y kh\u00f4ng \u1ed5n \u0111\u1ecbnh v\u00e0 ph\u1ee5 thu\u1ed9c v\u00e0o t\u1ea3i c\u1ee7a c\u00e1c container kh\u00e1c tr\u00ean c\u00f9ng m\u00e1y ch\u1ee7.<\/p>\n<p>Ng\u01b0\u1ee3c l\u1ea1i, KVM mang l\u1ea1i hi\u1ec7u su\u1ea5t \u1ed5n \u0111\u1ecbnh v\u00e0 c\u00f3 th\u1ec3 d\u1ef1 \u0111o\u00e1n \u0111\u01b0\u1ee3c. M\u1eb7c d\u00f9 c\u00f3 m\u1ed9t l\u1edbp \u1ea3o h\u00f3a ph\u1ea7n c\u1ee9ng, c\u00e1c c\u00f4ng ngh\u1ec7 nh\u01b0 Intel VT-x v\u00e0 VirtIO drivers \u0111\u00e3 gi\u1ea3m thi\u1ec3u t\u1ed1i \u0111a \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u n\u0103ng. Theo c\u00e1c b\u00e0i ki\u1ec3m tra hi\u1ec7u n\u0103ng t\u1eeb Phoronix, m\u1ed9t trang \u0111\u00e1nh gi\u00e1 ph\u1ea7n c\u1ee9ng uy t\u00edn, KVM th\u01b0\u1eddng cho th\u1ea5y hi\u1ec7u su\u1ea5t \u1ed5n \u0111\u1ecbnh h\u01a1n d\u01b0\u1edbi c\u00e1c t\u1ea3i c\u00f4ng vi\u1ec7c n\u1eb7ng v\u00e0 \u0111a d\u1ea1ng.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Kha-nang-tuy-bien-va-cai-dat\"><\/span>Kh\u1ea3 n\u0103ng t\u00f9y bi\u1ebfn v\u00e0 c\u00e0i \u0111\u1eb7t<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0110\u00e2y l\u00e0 \u0111i\u1ec3m kh\u00e1c bi\u1ec7t l\u1edbn nh\u1ea5t. V\u1edbi KVM, b\u1ea1n c\u00f3 to\u00e0n quy\u1ec1n t\u1ef1 do. B\u1ea1n c\u00f3 th\u1ec3 c\u00e0i \u0111\u1eb7t Ubuntu 22.04, Windows Server 2022, ho\u1eb7c th\u1eadm ch\u00ed th\u1eed nghi\u1ec7m v\u1edbi FreeBSD tr\u00ean VPS c\u1ee7a m\u00ecnh. B\u1ea1n c\u00f3 th\u1ec3 n\u00e2ng c\u1ea5p kernel, bi\u00ean d\u1ecbch c\u00e1c module ri\u00eang, v\u00e0 tinh ch\u1ec9nh h\u1ec7 th\u1ed1ng \u1edf m\u1ee9c \u0111\u1ed9 s\u00e2u nh\u1ea5t.<\/p>\n<p>V\u1edbi OpenVZ, b\u1ea1n b\u1ecb gi\u1edbi h\u1ea1n trong h\u1ec7 sinh th\u00e1i Linux v\u00e0 ph\u1ee5 thu\u1ed9c v\u00e0o phi\u00ean b\u1ea3n kernel m\u00e0 nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 l\u1ef1a ch\u1ecdn. B\u1ea1n kh\u00f4ng th\u1ec3 c\u00e0i \u0111\u1eb7t c\u00e1c \u1ee9ng d\u1ee5ng y\u00eau c\u1ea7u phi\u00ean b\u1ea3n kernel c\u1ee5 th\u1ec3 ho\u1eb7c c\u00e1c module kh\u00f4ng \u0111\u01b0\u1ee3c m\u00e1y ch\u1ee7 ch\u1ee7 h\u1ed7 tr\u1ee3, v\u00ed d\u1ee5 nh\u01b0 Docker (trong Docker) ho\u1eb7c c\u00e1c gi\u1ea3i ph\u00e1p VPN ph\u1ee9c t\u1ea1p.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Do-bao-mat-va-cach-quan-ly-tai-nguyen\"><\/span>\u0110\u1ed9 b\u1ea3o m\u1eadt v\u00e0 c\u00e1ch qu\u1ea3n l\u00fd t\u00e0i nguy\u00ean<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>KVM chi\u1ebfn th\u1eafng tuy\u1ec7t \u0111\u1ed1i \u1edf kh\u00eda c\u1ea1nh n\u00e0y. S\u1ef1 c\u00f4 l\u1eadp ho\u00e0n to\u00e0n gi\u1eefa c\u00e1c m\u00e1y \u1ea3o \u0111\u1ed3ng ngh\u0129a v\u1edbi vi\u1ec7c t\u00e0i nguy\u00ean c\u1ee7a b\u1ea1n \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7. D\u1eef li\u1ec7u, ti\u1ebfn tr\u00ecnh v\u00e0 l\u01b0u l\u01b0\u1ee3ng m\u1ea1ng c\u1ee7a b\u1ea1n ho\u00e0n to\u00e0n t\u00e1ch bi\u1ec7t.<\/p>\n<p>OpenVZ, do b\u1ea3n ch\u1ea5t chia s\u1ebb, ti\u1ec1m \u1ea9n r\u1ee7i ro v\u1ec1 b\u1ea3o m\u1eadt. M\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng DoS v\u00e0o m\u1ed9t container c\u00f3 th\u1ec3 l\u00e0m ch\u1eadm to\u00e0n b\u1ed9 m\u00e1y ch\u1ee7. V\u1ea5n \u0111\u1ec1 &#8220;overselling&#8221; c\u0169ng l\u00e0 m\u1ed9t m\u1ed1i lo ng\u1ea1i, v\u00ec hi\u1ec7u su\u1ea5t VPS c\u1ee7a b\u1ea1n c\u00f3 th\u1ec3 b\u1ecb suy gi\u1ea3m \u0111\u1ed9t ng\u1ed9t khi c\u00e1c &#8220;h\u00e0ng x\u00f3m&#8221; s\u1eed d\u1ee5ng qu\u00e1 nhi\u1ec1u t\u00e0i nguy\u00ean.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Chi-phi-va-tinh-linh-hoat\"><\/span>Chi ph\u00ed v\u00e0 t\u00ednh linh ho\u1ea1t<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>OpenVZ r\u00f5 r\u00e0ng l\u00e0 l\u1ef1a ch\u1ecdn kinh t\u1ebf h\u01a1n. Kh\u1ea3 n\u0103ng &#8220;nh\u1ed3i nh\u00e9t&#8221; nhi\u1ec1u container tr\u00ean m\u1ed9t m\u00e1y ch\u1ee7 gi\u00fap nh\u00e0 cung c\u1ea5p gi\u1ea3m gi\u00e1 th\u00e0nh. N\u1ebfu ng\u00e2n s\u00e1ch l\u00e0 \u01b0u ti\u00ean h\u00e0ng \u0111\u1ea7u v\u00e0 nhu c\u1ea7u c\u1ee7a b\u1ea1n kh\u00f4ng qu\u00e1 ph\u1ee9c t\u1ea1p, OpenVZ l\u00e0 m\u1ed9t gi\u1ea3i ph\u00e1p h\u1ee3p l\u00fd.<\/p>\n<p>KVM c\u00f3 chi ph\u00ed cao h\u01a1n, nh\u01b0ng chi ph\u00ed \u0111\u00f3 mang l\u1ea1i s\u1ef1 \u0111\u1ea3m b\u1ea3o. B\u1ea1n tr\u1ea3 ti\u1ec1n cho nh\u1eefng t\u00e0i nguy\u00ean \u0111\u01b0\u1ee3c c\u1ea5p ph\u00e1t ri\u00eang v\u00e0 s\u1ef1 linh ho\u1ea1t \u0111\u1ec3 ch\u1ea1y b\u1ea5t k\u1ef3 ph\u1ea7n m\u1ec1m n\u00e0o b\u1ea1n mu\u1ed1n. \u0110\u00e2y l\u00e0 m\u1ed9t kho\u1ea3n \u0111\u1ea7u t\u01b0 v\u00e0o s\u1ef1 \u1ed5n \u0111\u1ecbnh v\u00e0 kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng trong t\u01b0\u01a1ng lai.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Nen-chon-OpenVZ-hay-KVM-cho-nhu-cau-cua-ban\"><\/span>N\u00ean ch\u1ecdn OpenVZ hay KVM cho nhu c\u1ea7u c\u1ee7a b\u1ea1n?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Kh\u00f4ng c\u00f3 c\u00e2u tr\u1ea3 l\u1eddi n\u00e0o l\u00e0 &#8220;t\u1ed1t nh\u1ea5t cho t\u1ea5t c\u1ea3&#8221;. L\u1ef1a ch\u1ecdn \u0111\u00fang ph\u1ee5 thu\u1ed9c ho\u00e0n to\u00e0n v\u00e0o nhu c\u1ea7u, ng\u00e2n s\u00e1ch v\u00e0 y\u00eau c\u1ea7u k\u1ef9 thu\u1eadt c\u1ee7a b\u1ea1n. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 c\u00e1c k\u1ecbch b\u1ea3n c\u1ee5 th\u1ec3 \u0111\u1ec3 b\u1ea1n tham kh\u1ea3o.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/06\/OpenVZ-vs-KVM-01.jpg\" alt=\"OpenVZ vs KVM\" width=\"600\" height=\"400\" class=\"aligncenter wp-image-31103\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/06\/OpenVZ-vs-KVM-01.jpg 750w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/06\/OpenVZ-vs-KVM-01-300x200.jpg 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Truong-hop-nen-dung-OpenVZ\"><\/span>Tr\u01b0\u1eddng h\u1ee3p n\u00ean d\u00f9ng OpenVZ<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><strong>Ng\u00e2n s\u00e1ch eo h\u1eb9p:<\/strong> B\u1ea1n l\u00e0 sinh vi\u00ean, ng\u01b0\u1eddi m\u1edbi b\u1eaft \u0111\u1ea7u ho\u1eb7c c\u00f3 m\u1ed9t d\u1ef1 \u00e1n ph\u1ee5 v\u1edbi ng\u00e2n s\u00e1ch h\u1ea1n ch\u1ebf.<\/li>\n<li><strong>M\u00f4i tr\u01b0\u1eddng Dev\/Test:<\/strong> B\u1ea1n c\u1ea7n m\u1ed9t m\u00f4i tr\u01b0\u1eddng nh\u1eb9, kh\u1edfi \u0111\u1ed9ng nhanh \u0111\u1ec3 l\u1eadp tr\u00ecnh v\u00e0 th\u1eed nghi\u1ec7m c\u00e1c \u1ee9ng d\u1ee5ng tr\u00ean n\u1ec1n t\u1ea3ng Linux.<\/li>\n<li><strong>C\u00e1c trang web t\u0129nh ho\u1eb7c c\u00f3 l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp th\u1ea5p:<\/strong> C\u00e1c blog c\u00e1 nh\u00e2n, trang gi\u1edbi thi\u1ec7u c\u00f4ng ty ho\u1eb7c c\u00e1c website \u0111\u01a1n gi\u1ea3n kh\u00f4ng y\u00eau c\u1ea7u t\u00e0i nguy\u00ean cao.<\/li>\n<li><strong>C\u00e1c t\u00e1c v\u1ee5 kh\u00f4ng quan tr\u1ecdng:<\/strong> Ch\u1ea1y c\u00e1c bot t\u1ef1 \u0111\u1ed9ng h\u00f3a, proxy ho\u1eb7c c\u00e1c d\u1ecbch v\u1ee5 kh\u00f4ng y\u00eau c\u1ea7u \u0111\u1ed9 s\u1eb5n s\u00e0ng 100%.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Truong-hop-nen-dung-KVM\"><\/span>Tr\u01b0\u1eddng h\u1ee3p n\u00ean d\u00f9ng KVM<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><strong>Website Th\u01b0\u01a1ng m\u1ea1i \u0111i\u1ec7n t\u1eed:<\/strong> C\u00e1c c\u1eeda h\u00e0ng online y\u00eau c\u1ea7u s\u1ef1 \u1ed5n \u0111\u1ecbnh, b\u1ea3o m\u1eadt cho giao d\u1ecbch v\u00e0 hi\u1ec7u su\u1ea5t nh\u1ea5t qu\u00e1n \u0111\u1ec3 x\u1eed l\u00fd \u0111\u01a1n h\u00e0ng.<\/li>\n<li><strong>\u1ee8ng d\u1ee5ng doanh nghi\u1ec7p:<\/strong> L\u01b0u tr\u1eef c\u00e1c ph\u1ea7n m\u1ec1m CRM, ERP, ho\u1eb7c c\u00e1c \u1ee9ng d\u1ee5ng n\u1ed9i b\u1ed9 \u0111\u00f2i h\u1ecfi t\u00e0i nguy\u00ean \u0111\u01b0\u1ee3c \u0111\u1ea3m b\u1ea3o v\u00e0 t\u00ednh b\u1ea3o m\u1eadt d\u1eef li\u1ec7u cao.<\/li>\n<li><strong>L\u01b0u tr\u1eef Game Server:<\/strong> C\u00e1c game server r\u1ea5t nh\u1ea1y c\u1ea3m v\u1edbi \u0111\u1ed9 tr\u1ec5 v\u00e0 y\u00eau c\u1ea7u t\u00e0i nguy\u00ean CPU, RAM \u1ed5n \u0111\u1ecbnh \u0111\u1ec3 mang l\u1ea1i tr\u1ea3i nghi\u1ec7m t\u1ed1t nh\u1ea5t cho ng\u01b0\u1eddi ch\u01a1i.<\/li>\n<li><strong>C\u1ea7n c\u00e0i \u0111\u1eb7t Windows:<\/strong> B\u1ea1n c\u1ea7n ch\u1ea1y c\u00e1c \u1ee9ng d\u1ee5ng ho\u1eb7c ph\u1ea7n m\u1ec1m ch\u1ec9 t\u01b0\u01a1ng th\u00edch v\u1edbi h\u1ec7 \u0111i\u1ec1u h\u00e0nh Windows (v\u00ed d\u1ee5: ASP.NET, MS SQL Server).<\/li>\n<li><strong>Y\u00eau c\u1ea7u t\u00f9y ch\u1ec9nh cao:<\/strong> B\u1ea1n c\u1ea7n to\u00e0n quy\u1ec1n ki\u1ec3m so\u00e1t kernel, c\u00e0i \u0111\u1eb7t Docker, ho\u1eb7c c\u00e1c ph\u1ea7n m\u1ec1m y\u00eau c\u1ea7u quy\u1ec1n truy c\u1eadp h\u1ec7 th\u1ed1ng \u1edf m\u1ee9c \u0111\u1ed9 s\u00e2u.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Loi-ket\"><\/span>L\u1eddi k\u1ebft<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Cu\u1ed9c \u0111\u1ed1i \u0111\u1ea7u gi\u1eefa OpenVZ v\u00e0 KVM kh\u00f4ng c\u00f3 ng\u01b0\u1eddi chi\u1ebfn th\u1eafng tuy\u1ec7t \u0111\u1ed1i. M\u1ed7i c\u00f4ng ngh\u1ec7 ph\u1ee5c v\u1ee5 cho m\u1ed9t ph\u00e2n kh\u00fac ng\u01b0\u1eddi d\u00f9ng v\u00e0 m\u1ee5c \u0111\u00edch s\u1eed d\u1ee5ng kh\u00e1c nhau. OpenVZ l\u00e0 l\u1ef1a ch\u1ecdn kinh t\u1ebf, t\u1ed1c \u0111\u1ed9 cho c\u00e1c nhu c\u1ea7u c\u01a1 b\u1ea3n tr\u00ean Linux. Trong khi \u0111\u00f3, KVM l\u00e0 ti\u00eau chu\u1ea9n v\u00e0ng v\u1ec1 s\u1ef1 \u1ed5n \u0111\u1ecbnh, b\u1ea3o m\u1eadt v\u00e0 linh ho\u1ea1t cho c\u00e1c d\u1ef1 \u00e1n quan tr\u1ecdng v\u00e0 \u0111\u00f2i h\u1ecfi cao.<\/p>\n<p>B\u1eb1ng c\u00e1ch hi\u1ec3u r\u00f5 s\u1ef1 kh\u00e1c bi\u1ec7t c\u1ed1t l\u00f5i v\u1ec1 ki\u1ebfn tr\u00fac, hi\u1ec7u n\u0103ng v\u00e0 b\u1ea3o m\u1eadt \u0111\u01b0\u1ee3c ph\u00e2n t\u00edch trong b\u00e0i vi\u1ebft n\u00e0y, b\u1ea1n \u0111\u00e3 c\u00f3 \u0111\u1ee7 d\u1eef li\u1ec7u \u0111\u1ec3 \u0111\u01b0a ra quy\u1ebft \u0111\u1ecbnh s\u00e1ng su\u1ed1t. H\u00e3y c\u00e2n nh\u1eafc k\u1ef9 l\u01b0\u1ee1ng y\u00eau c\u1ea7u d\u1ef1 \u00e1n v\u00e0 ng\u00e2n s\u00e1ch c\u1ee7a m\u00ecnh \u0111\u1ec3 ch\u1ecdn \u0111\u01b0\u1ee3c c\u00f4ng ngh\u1ec7 \u1ea3o h\u00f3a \u0111\u1ed3ng h\u00e0nh c\u00f9ng b\u1ea1n tr\u00ean con \u0111\u01b0\u1eddng ph\u00e1t tri\u1ec3n.<\/p>\n<p><strong>B\u1ea1n \u0111\u00e3 s\u1eb5n s\u00e0ng \u0111\u1ec3 tr\u1ea3i nghi\u1ec7m m\u1ed9t d\u1ecbch v\u1ee5 VPS m\u1ea1nh m\u1ebd, \u1ed5n \u0111\u1ecbnh v\u00e0 linh ho\u1ea1t? Tham kh\u1ea3o d\u1ecbch v\u1ee5 <\/strong><a target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/interdata.vn\/thue-vps\/\"><strong>VPS gi\u00e1 r\u1ebb uy t\u00edn &#8211; Hi\u1ec7u n\u0103ng cao &#8211; To\u00e0n quy\u1ec1n qu\u1ea3n tr\u1ecb<\/strong><\/a><strong> t\u1ea1i InterData ngay h\u00f4m nay!<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>L\u1ef1a ch\u1ecdn c\u00f4ng ngh\u1ec7 \u1ea3o h\u00f3a VPS quy\u1ebft \u0111\u1ecbnh tr\u1ef1c ti\u1ebfp \u0111\u1ebfn hi\u1ec7u n\u0103ng, b\u1ea3o m\u1eadt v\u00e0 chi ph\u00ed cho d\u1ef1 \u00e1n c\u1ee7a b\u1ea1n. Vi\u1ec7c \u0111\u1ee9ng gi\u1eefa hai l\u1ef1a ch\u1ecdn ph\u1ed5 bi\u1ebfn l\u00e0 OpenVZ v\u00e0 KVM \u0111\u00f2i h\u1ecfi m\u1ed9t s\u1ef1 hi\u1ec3u bi\u1ebft s\u00e2u s\u1eafc v\u1ec1 b\u1ea3n ch\u1ea5t c\u1ee7a t\u1eebng c\u00f4ng ngh\u1ec7. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd<\/p>\n","protected":false},"author":2,"featured_media":31104,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[49],"tags":[],"class_list":["post-31102","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\/31102","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=31102"}],"version-history":[{"count":2,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/31102\/revisions"}],"predecessor-version":[{"id":31132,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/31102\/revisions\/31132"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/media\/31104"}],"wp:attachment":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/media?parent=31102"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/categories?post=31102"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/tags?post=31102"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}