{"id":19888,"date":"2025-10-13T14:55:07","date_gmt":"2025-10-13T07:55:07","guid":{"rendered":"https:\/\/interdata.vn\/blog\/?p=19888"},"modified":"2025-10-14T14:34:54","modified_gmt":"2025-10-14T07:34:54","slug":"web-cache-la-gi","status":"publish","type":"post","link":"https:\/\/interdata.vn\/blog\/web-cache-la-gi\/","title":{"rendered":"Web Cache l\u00e0 g\u00ec? C\u00e1ch ho\u1ea1t \u0111\u1ed9ng, ph\u00e2n lo\u1ea1i &#038; C\u00e1ch c\u1ea5u h\u00ecnh A-Z"},"content":{"rendered":"<p>N\u1ebfu b\u1ea1n l\u00e0 ch\u1ee7 m\u1ed9t website, blogger, ho\u1eb7c SEOer, t\u1ed1c \u0111\u1ed9 t\u1ea3i trang lu\u00f4n l\u00e0 \u01b0u ti\u00ean h\u00e0ng \u0111\u1ea7u. M\u1ed9t website t\u1ea3i ch\u1eadm kh\u00f4ng ch\u1ec9 l\u00e0m m\u1ea5t kh\u00e1ch h\u00e0ng ti\u1ec1m n\u0103ng m\u00e0 c\u00f2n b\u1ecb Google PageSpeed Insights \u0111\u00e1nh gi\u00e1 th\u1ea5p. B\u00ed quy\u1ebft \u0111\u1ec3 \u0111\u1ea1t t\u1ed1c \u0111\u1ed9 t\u1ea3i &#8220;t\u1ee9c th\u00ec&#8221; cho website c\u1ee7a b\u1ea1n n\u1eb1m \u1edf m\u1ed9t k\u1ef9 thu\u1eadt m\u1ea1ng c\u1ed1t l\u00f5i: <strong>Web Cache<\/strong>. V\u1eady <strong>Web Cache l\u00e0 g\u00ec?<\/strong> InterData s\u1ebd gi\u00fap b\u1ea1n hi\u1ec3u r\u00f5 c\u01a1 ch\u1ebf ho\u1ea1t \u0111\u1ed9ng c\u1ee7a Web Cache, ph\u00e2n bi\u1ec7t c\u00e1c t\u1ea7ng Cache quan tr\u1ecdng, v\u00e0 cung c\u1ea5p c\u00e1c gi\u1ea3i ph\u00e1p k\u1ef9 thu\u1eadt \u0111\u1ec3 t\u0103ng t\u1ed1c website b\u1eb1ng cache m\u1ed9t c\u00e1ch an to\u00e0n nh\u1ea5t.<\/p>\n<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\/web-cache-la-gi\/#Web-Cache-la-gi\" >Web Cache 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\/web-cache-la-gi\/#Web-Cache-hoat-dong-nhu-the-nao\" >Web Cache ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o?<\/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\/web-cache-la-gi\/#Cac-loai-web-cache-hien-nay\" >C\u00e1c lo\u1ea1i web cache hi\u1ec7n nay<\/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\/web-cache-la-gi\/#1-Web-Cache-phia-trinh-duyet\" >1. Web Cache ph\u00eda tr\u00ecnh duy\u1ec7t<\/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\/web-cache-la-gi\/#2-Web-Cache-phia-may-chu\" >2. Web Cache ph\u00eda m\u00e1y ch\u1ee7<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/interdata.vn\/blog\/web-cache-la-gi\/#Vai-tro-cot-loi-cua-Web-Cache-doi-voi-hieu-suat-Website\" >Vai tr\u00f2 c\u1ed1t l\u00f5i c\u1ee7a Web Cache \u0111\u1ed1i v\u1edbi hi\u1ec7u su\u1ea5t Website<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/interdata.vn\/blog\/web-cache-la-gi\/#Cai-thien-toc-do-tai-trang-va-trai-nghiem-nguoi-dung-UX\" >C\u1ea3i thi\u1ec7n t\u1ed1c \u0111\u1ed9 t\u1ea3i trang v\u00e0 tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng (UX)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/interdata.vn\/blog\/web-cache-la-gi\/#Toi-uu-diem-Google-PageSpeed-Insights\" >T\u1ed1i \u01b0u \u0111i\u1ec3m Google PageSpeed Insights<\/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\/web-cache-la-gi\/#Giam-tai-tai-nguyen-va-chi-phi-Hosting\" >Gi\u1ea3m t\u1ea3i t\u00e0i nguy\u00ean v\u00e0 chi ph\u00ed Hosting<\/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\/web-cache-la-gi\/#Loi-ich-cua-Web-Cache\" >L\u1ee3i \u00edch c\u1ee7a Web Cache<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/interdata.vn\/blog\/web-cache-la-gi\/#Cac-thanh-phan-thuat-ngu-ky-thuat-trong-Web-Cache\" >C\u00e1c th\u00e0nh ph\u1ea7n &amp; thu\u1eadt ng\u1eef k\u1ef9 thu\u1eadt trong Web Cache<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/interdata.vn\/blog\/web-cache-la-gi\/#Cac-thanh-phan-chinh-cua-Web-Cache\" >C\u00e1c th\u00e0nh ph\u1ea7n ch\u00ednh c\u1ee7a Web Cache<\/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\/web-cache-la-gi\/#Thuat-ngu-ky-thuat-pho-bien-trong-Web-Cache\" >Thu\u1eadt ng\u1eef k\u1ef9 thu\u1eadt ph\u1ed5 bi\u1ebfn trong Web Cache<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/interdata.vn\/blog\/web-cache-la-gi\/#3-Tang-Web-Cache-quan-trong-va-cach-quan-ly\" >3 T\u1ea7ng Web Cache quan tr\u1ecdng v\u00e0 c\u00e1ch qu\u1ea3n l\u00fd<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/interdata.vn\/blog\/web-cache-la-gi\/#Browser-Cache-Client-Side-Caching\" >Browser Cache (Client-Side Caching)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/interdata.vn\/blog\/web-cache-la-gi\/#Server-Cache-Proxy-Cache-Server-Side-Cache\" >Server Cache (Proxy Cache &amp; Server-Side Cache)<\/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\/web-cache-la-gi\/#CDN-Cache-Content-Delivery-Network\" >CDN Cache (Content Delivery Network)<\/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\/web-cache-la-gi\/#Nhung-loi-thuong-gap-khi-su-dung-Web-Cache\" >Nh\u1eefng l\u1ed7i th\u01b0\u1eddng g\u1eb7p khi s\u1eed d\u1ee5ng Web Cache<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/interdata.vn\/blog\/web-cache-la-gi\/#Cache-khong-cap-nhat-noi-dung-moi\" >Cache kh\u00f4ng c\u1eadp nh\u1eadt n\u1ed9i dung m\u1edbi<\/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\/web-cache-la-gi\/#Cache-sai-du-lieu-user\" >Cache sai d\u1eef li\u1ec7u user<\/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\/web-cache-la-gi\/#Cache-nham-cookiesession\" >Cache nh\u1ea7m cookie\/session<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/interdata.vn\/blog\/web-cache-la-gi\/#Khong-xoa-duoc-cache-Purge-Error\" >Kh\u00f4ng x\u00f3a \u0111\u01b0\u1ee3c cache (Purge Error)<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/interdata.vn\/blog\/web-cache-la-gi\/#Cac-cong-cu-va-giai-phap-trien-khai-Web-Cache-thuc-te\" >C\u00e1c c\u00f4ng c\u1ee5 v\u00e0 gi\u1ea3i ph\u00e1p tri\u1ec3n khai Web Cache th\u1ef1c t\u1ebf<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/interdata.vn\/blog\/web-cache-la-gi\/#Plugin-Cache-cho-nen-tang-WordPress\" >Plugin Cache cho n\u1ec1n t\u1ea3ng WordPress<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/interdata.vn\/blog\/web-cache-la-gi\/#Dich-vu-CDN-hang-dau-Cloudflare-Akamai\" >D\u1ecbch v\u1ee5 CDN h\u00e0ng \u0111\u1ea7u (Cloudflare, Akamai)<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/interdata.vn\/blog\/web-cache-la-gi\/#Cach-cai-dat-Web-Cache-tren-website-WordPress\" >C\u00e1ch c\u00e0i \u0111\u1eb7t Web Cache tr\u00ean website WordPress<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-27\" href=\"https:\/\/interdata.vn\/blog\/web-cache-la-gi\/#Su-dung-Plugin-Caching\" >S\u1eed d\u1ee5ng Plugin Caching<\/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\/web-cache-la-gi\/#Cac-buoc-cai-dat-Plugin-Caching\" >C\u00e1c b\u01b0\u1edbc c\u00e0i \u0111\u1eb7t Plugin Caching<\/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\/web-cache-la-gi\/#Cau-hoi-thuong-gap-ve-Web-Cache-FAQ\" >C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 Web Cache (FAQ)<\/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\/web-cache-la-gi\/#Web-cache-la-gi-va-tai-sao-can-thiet\" >Web cache l\u00e0 g\u00ec v\u00e0 t\u1ea1i sao c\u1ea7n thi\u1ebft?<\/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\/web-cache-la-gi\/#Cache-co-anh-huong-den-SEO-khong\" >Cache c\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn SEO kh\u00f4ng?<\/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\/web-cache-la-gi\/#TTL-la-gi-trong-cache\" >TTL l\u00e0 g\u00ec trong cache?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-33\" href=\"https:\/\/interdata.vn\/blog\/web-cache-la-gi\/#Cache-CDN-khac-gi-cache-trinh-duyet\" >Cache CDN kh\u00e1c g\u00ec cache tr\u00ecnh duy\u1ec7t?<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Web-Cache-la-gi\"><\/span>Web Cache l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>Web Cache<\/strong> <em>(hay HTTP Cache)<\/em> l\u00e0 m\u1ed9t c\u00f4ng ngh\u1ec7 <strong>l\u01b0u tr\u1eef t\u1ea1m th\u1eddi<\/strong> c\u00e1c d\u1eef li\u1ec7u t\u1eeb trang web, ch\u1eb3ng h\u1ea1n nh\u01b0 t<em>rang HTML, h\u00ecnh \u1ea3nh, video&#8230;<\/em> nh\u1eb1m m\u1ee5c \u0111\u00edch gi\u1ea3m t\u1ea3i cho m\u00e1y ch\u1ee7 (server) v\u00e0 c\u1ea3i thi\u1ec7n t\u1ed1c \u0111\u1ed9 truy c\u1eadp c\u1ee7a ng\u01b0\u1eddi d\u00f9ng. Khi ng\u01b0\u1eddi d\u00f9ng truy c\u1eadp v\u00e0o m\u1ed9t trang web, d\u1eef li\u1ec7u s\u1ebd \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef trong b\u1ed9 nh\u1edb t\u1ea1m (cache), gi\u00fap c\u00e1c l\u1ea7n truy c\u1eadp sau di\u1ec5n ra nhanh ch\u00f3ng h\u01a1n m\u00e0 kh\u00f4ng c\u1ea7n ph\u1ea3i t\u1ea3i l\u1ea1i to\u00e0n b\u1ed9 th\u00f4ng tin t\u1eeb m\u00e1y ch\u1ee7.<\/p>\n<p>H\u1ec7 th\u1ed1ng Web Cache ho\u1ea1t \u0111\u1ed9ng b\u1eb1ng c\u00e1ch l\u01b0u tr\u1eef d\u1eef li\u1ec7u m\u00e0 n\u00f3 c\u00f3 th\u1ec3 ch\u1ee9a. Khi c\u1ea7n l\u01b0u tr\u1eef th\u00eam d\u1eef li\u1ec7u, n\u1ebfu b\u1ed9 nh\u1edb cache v\u1eabn c\u00f2n ch\u1ed7 tr\u1ed1ng, c\u00e1c th\u00f4ng tin m\u1edbi s\u1ebd ti\u1ebfp t\u1ee5c \u0111\u01b0\u1ee3c l\u01b0u v\u00e0o. \u0110i\u1ec1u n\u00e0y gi\u00fap t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t v\u00e0 gi\u1ea3m thi\u1ec3u \u0111\u1ed9 tr\u1ec5 (lag) khi c\u00f3 nhi\u1ec1u ng\u01b0\u1eddi d\u00f9ng truy c\u1eadp v\u00e0o c\u00f9ng m\u1ed9t l\u00fac.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-19899\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/web-cache-la-gi.webp\" alt=\"Web Cache\" width=\"800\" height=\"341\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/web-cache-la-gi.webp 800w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/web-cache-la-gi-300x128.webp 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/web-cache-la-gi-768x327.webp 768w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/web-cache-la-gi-750x320.webp 750w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/p>\n<p>Web Cache c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c tri\u1ec3n khai d\u01b0\u1edbi d\u1ea1ng ph\u1ea7n m\u1ec1m ho\u1eb7c \u1ee9ng d\u1ee5ng t\u00edch h\u1ee3p trong h\u1ec7 th\u1ed1ng m\u00e1y t\u00ednh. M\u1ed9t trong nh\u1eefng d\u1ea1ng ph\u1ed5 bi\u1ebfn c\u1ee7a Web Cache ch\u00ednh l\u00e0 <strong>CDN (Content Delivery Network)<\/strong>. CDN gi\u00fap ph\u00e2n ph\u1ed1i n\u1ed9i dung trang web \u0111\u1ebfn ng\u01b0\u1eddi d\u00f9ng th\u00f4ng qua c\u00e1c m\u00e1y ch\u1ee7 \u0111\u01b0\u1ee3c \u0111\u1eb7t t\u1ea1i nhi\u1ec1u v\u1ecb tr\u00ed \u0111\u1ecba l\u00fd kh\u00e1c nhau, gi\u00fap t\u0103ng t\u1ed1c \u0111\u1ed9 t\u1ea3i trang v\u00e0 c\u1ea3i thi\u1ec7n tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng, \u0111\u1eb7c bi\u1ec7t v\u1edbi c\u00e1c website c\u00f3 l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp l\u1edbn.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Web-Cache-hoat-dong-nhu-the-nao\"><\/span>Web Cache ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Web cache ho\u1ea1t \u0111\u1ed9ng b\u1eb1ng c\u00e1ch <strong>t\u1ea1o ra c\u00e1c b\u1ea3n sao<\/strong> c\u1ee7a d\u1eef li\u1ec7u trang web v\u00e0 <strong>l\u01b0u tr\u1eef ch\u00fang v\u00e0o b\u1ed9 nh\u1edb \u0111\u1ec7m<\/strong> tr\u00ean m\u00e1y t\u00ednh ho\u1eb7c m\u00e1y ch\u1ee7 web cache. C\u00e1c b\u1ea3n sao n\u00e0y sau \u0111\u00f3 s\u1ebd \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ph\u1ea3n h\u1ed3i y\u00eau c\u1ea7u truy c\u1eadp c\u1ee7a ng\u01b0\u1eddi d\u00f9ng, gi\u00fap gi\u1ea3m t\u1ea3i cho m\u00e1y ch\u1ee7 g\u1ed1c v\u00e0 t\u0103ng t\u1ed1c \u0111\u1ed9 t\u1ea3i trang.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-19895\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/cach-thuc-hoat-dong-web-cache.webp\" alt=\"c\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng web cache\" width=\"800\" height=\"324\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/cach-thuc-hoat-dong-web-cache.webp 800w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/cach-thuc-hoat-dong-web-cache-300x122.webp 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/cach-thuc-hoat-dong-web-cache-768x311.webp 768w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/cach-thuc-hoat-dong-web-cache-750x304.webp 750w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/p>\n<p>C\u1ee5 th\u1ec3, khi ng\u01b0\u1eddi d\u00f9ng truy c\u1eadp m\u1ed9t trang web, tr\u00ecnh duy\u1ec7t s\u1ebd g\u1eedi y\u00eau c\u1ea7u HTTP (HTTP Request) \u0111\u1ebfn m\u00e1y ch\u1ee7. Web cache s\u1ebd ghi nh\u1eadn c\u00e1c y\u00eau c\u1ea7u n\u00e0y v\u00e0 \u0111\u00f3ng g\u00f3i d\u1eef li\u1ec7u c\u1ee7a trang th\u00e0nh t\u1ec7p HTML t\u0129nh. N\u1ebfu c\u00f3 ng\u01b0\u1eddi d\u00f9ng kh\u00e1c truy c\u1eadp c\u00f9ng trang web \u0111\u00f3, thay v\u00ec x\u1eed l\u00fd l\u1ea1i y\u00eau c\u1ea7u t\u1eeb \u0111\u1ea7u, m\u00e1y ch\u1ee7 s\u1ebd tr\u1ea3 v\u1ec1 t\u1ec7p HTML \u0111\u00e3 \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef, gi\u00fap trang t\u1ea3i nhanh h\u01a1n m\u00e0 kh\u00f4ng c\u1ea7n truy xu\u1ea5t l\u1ea1i to\u00e0n b\u1ed9 d\u1eef li\u1ec7u t\u1eeb m\u00e1y ch\u1ee7 g\u1ed1c.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Cac-loai-web-cache-hien-nay\"><\/span>C\u00e1c lo\u1ea1i web cache hi\u1ec7n nay<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Hi\u1ec7n nay, web cache c\u00f3 hai lo\u1ea1i ch\u00ednh, \u0111\u00f3 l\u00e0 <strong>cache ph\u00eda tr\u00ecnh duy\u1ec7t<\/strong> v\u00e0 <strong>cache ph\u00eda m\u00e1y ch\u1ee7<\/strong>. M\u1ed7i lo\u1ea1i \u0111\u1ec1u c\u00f3 nh\u1eefng l\u1ee3i \u00edch ri\u00eang gi\u00fap c\u1ea3i thi\u1ec7n t\u1ed1c \u0111\u1ed9 v\u00e0 hi\u1ec7u su\u1ea5t website.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"1-Web-Cache-phia-trinh-duyet\"><\/span>1. Web Cache ph\u00eda tr\u00ecnh duy\u1ec7t<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Cache ph\u00eda tr\u00ecnh duy\u1ec7t ho\u1ea1t \u0111\u1ed9ng b\u1eb1ng c\u00e1ch l\u01b0u tr\u1eef d\u1eef li\u1ec7u tr\u1ef1c ti\u1ebfp trong b\u1ed9 nh\u1edb \u0111\u1ec7m c\u1ee7a tr\u00ecnh duy\u1ec7t. Khi ng\u01b0\u1eddi d\u00f9ng truy c\u1eadp v\u00e0o m\u1ed9t trang web, tr\u00ecnh duy\u1ec7t s\u1ebd t\u1ea3i xu\u1ed1ng c\u00e1c d\u1eef li\u1ec7u (h\u00ecnh \u1ea3nh, v\u0103n b\u1ea3n,\u2026) t\u1eeb m\u00e1y ch\u1ee7 v\u00e0 l\u01b0u ch\u00fang l\u1ea1i. Khi ng\u01b0\u1eddi d\u00f9ng quay l\u1ea1i truy c\u1eadp l\u1ea7n ti\u1ebfp theo, tr\u00ecnh duy\u1ec7t s\u1ebd hi\u1ec3n th\u1ecb c\u00e1c d\u1eef li\u1ec7u t\u1eeb b\u1ed9 nh\u1edb \u0111\u1ec7m m\u00e0 kh\u00f4ng c\u1ea7n t\u1ea3i l\u1ea1i t\u1eeb m\u00e1y ch\u1ee7, gi\u00fap t\u0103ng t\u1ed1c \u0111\u1ed9 t\u1ea3i trang \u0111\u00e1ng k\u1ec3.<\/p>\n<p>D\u1eef li\u1ec7u n\u00e0y \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef d\u1ef1a tr\u00ean c\u00e1c thu\u1ed9c t\u00ednh tr\u1ea1ng th\u00e1i trong <strong>HTTP Header<\/strong>. C\u00e1c thu\u1ed9c t\u00ednh n\u00e0y s\u1ebd x\u00e1c \u0111\u1ecbnh th\u1eddi gian d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef trong b\u1ed9 nh\u1edb \u0111\u1ec7m. Khi h\u1ebft th\u1eddi gian n\u00e0y, tr\u00ecnh duy\u1ec7t s\u1ebd t\u1ef1 \u0111\u1ed9ng x\u00f3a d\u1eef li\u1ec7u v\u00e0 t\u1ea3i l\u1ea1i khi ng\u01b0\u1eddi d\u00f9ng truy c\u1eadp trang.<\/p>\n<p>\u0110\u1ec3 x\u00f3a cache tr\u00ecnh duy\u1ec7t, b\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng ph\u00edm t\u1eaft nh\u01b0 <strong>CTRL + F5<\/strong> ho\u1eb7c <strong>CTRL + Shift + R<\/strong>. B\u1ea1n c\u0169ng c\u00f3 th\u1ec3 v\u00e0o ph\u1ea7n <strong>C\u00e0i \u0111\u1eb7t<\/strong> (Settings) c\u1ee7a tr\u00ecnh duy\u1ec7t \u0111\u1ec3 th\u1ef1c hi\u1ec7n thao t\u00e1c n\u00e0y.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-19896\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/cache-phia-trinh-duyet.webp\" alt=\"Web Cache ph\u00eda tr\u00ecnh duy\u1ec7t\" width=\"800\" height=\"566\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/cache-phia-trinh-duyet.webp 800w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/cache-phia-trinh-duyet-300x212.webp 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/cache-phia-trinh-duyet-768x543.webp 768w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/cache-phia-trinh-duyet-120x86.webp 120w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/cache-phia-trinh-duyet-750x531.webp 750w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/p>\n<h3><span class=\"ez-toc-section\" id=\"2-Web-Cache-phia-may-chu\"><\/span>2. Web Cache ph\u00eda m\u00e1y ch\u1ee7<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Cache ph\u00eda m\u00e1y ch\u1ee7 ho\u1ea1t \u0111\u1ed9ng t\u01b0\u01a1ng t\u1ef1 nh\u01b0 cache ph\u00eda tr\u00ecnh duy\u1ec7t, nh\u01b0ng thay v\u00ec l\u01b0u tr\u1eef tr\u00ean tr\u00ecnh duy\u1ec7t, d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c l\u01b0u tr\u00ean m\u00e1y ch\u1ee7 v\u1edbi dung l\u01b0\u1ee3ng l\u1edbn h\u01a1n. \u0110i\u1ec1u n\u00e0y gi\u00fap m\u00e1y ch\u1ee7 c\u00f3 th\u1ec3 ph\u1ee5c v\u1ee5 nhi\u1ec1u y\u00eau c\u1ea7u t\u1eeb ng\u01b0\u1eddi d\u00f9ng m\u00e0 kh\u00f4ng ph\u1ea3i x\u1eed l\u00fd l\u1ea1i c\u00f9ng m\u1ed9t d\u1eef li\u1ec7u nhi\u1ec1u l\u1ea7n.<\/p>\n<p>C\u00f3 4 c\u00f4ng ngh\u1ec7 ph\u1ed5 bi\u1ebfn \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho cache ph\u00eda m\u00e1y ch\u1ee7:<\/p>\n<ul>\n<li><strong>Full-page cache (Cache to\u00e0n trang)<\/strong>: T\u1ea5t c\u1ea3 d\u1eef li\u1ec7u c\u1ee7a trang web \u0111\u01b0\u1ee3c n\u00e9n th\u00e0nh m\u1ed9t t\u1ec7p HTML t\u0129nh v\u00e0 tr\u1ea3 v\u1ec1 cho tr\u00ecnh duy\u1ec7t khi ng\u01b0\u1eddi d\u00f9ng y\u00eau c\u1ea7u, gi\u00fap t\u0103ng t\u1ed1c \u0111\u1ed9 t\u1ea3i trang.<\/li>\n<li><strong>Object cache (B\u1ed9 nh\u1edb \u0111\u1ec7m \u0111\u1ed1i t\u01b0\u1ee3ng)<\/strong>: K\u1ef9 thu\u1eadt n\u00e0y gi\u00fap t\u1ed1i \u01b0u h\u00f3a vi\u1ec7c truy v\u1ea5n c\u01a1 s\u1edf d\u1eef li\u1ec7u. Khi truy v\u1ea5n l\u1ea7n \u0111\u1ea7u \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n, k\u1ebft qu\u1ea3 s\u1ebd \u0111\u01b0\u1ee3c l\u01b0u trong b\u1ed9 nh\u1edb \u0111\u1ec7m. C\u00e1c truy v\u1ea5n t\u01b0\u01a1ng t\u1ef1 sau \u0111\u00f3 s\u1ebd s\u1eed d\u1ee5ng k\u1ebft qu\u1ea3 t\u1eeb b\u1ed9 nh\u1edb \u0111\u1ec7m m\u00e0 kh\u00f4ng c\u1ea7n truy c\u1eadp l\u1ea1i v\u00e0o c\u01a1 s\u1edf d\u1eef li\u1ec7u.<\/li>\n<li><strong>Fragment cache<\/strong>: T\u01b0\u01a1ng t\u1ef1 nh\u01b0 object cache, nh\u01b0ng thay v\u00ec l\u01b0u tr\u1eef k\u1ebft qu\u1ea3 truy v\u1ea5n, n\u00f3 l\u01b0u tr\u1eef c\u00e1c ph\u1ea7n c\u1ee7a trang web nh\u01b0 ch\u1ee9c n\u0103ng, widget, ho\u1eb7c c\u00e1c \u0111o\u1ea1n m\u00e3.<\/li>\n<li><strong>CDN cache<\/strong>: D\u1eef li\u1ec7u \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef tr\u00ean c\u00e1c m\u00e1y ch\u1ee7 CDN (M\u1ea1ng ph\u00e2n ph\u1ed1i n\u1ed9i dung) c\u00f3 m\u1eb7t tr\u00ean to\u00e0n th\u1ebf gi\u1edbi. \u0110i\u1ec1u n\u00e0y gi\u00fap ng\u01b0\u1eddi d\u00f9ng truy c\u1eadp trang web nhanh h\u01a1n t\u1eeb b\u1ea5t k\u1ef3 v\u1ecb tr\u00ed n\u00e0o.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Vai-tro-cot-loi-cua-Web-Cache-doi-voi-hieu-suat-Website\"><\/span>Vai tr\u00f2 c\u1ed1t l\u00f5i c\u1ee7a Web Cache \u0111\u1ed1i v\u1edbi hi\u1ec7u su\u1ea5t Website<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Hi\u1ec3u \u0111\u01b0\u1ee3c <strong>Web Cache l\u00e0 g\u00ec<\/strong> v\u00e0 tri\u1ec3n khai n\u00f3 hi\u1ec7u qu\u1ea3 l\u00e0 b\u01b0\u1edbc \u0111i chi\u1ebfn l\u01b0\u1ee3c \u0111\u1ec3 c\u1ea3i thi\u1ec7n c\u00e1c ch\u1ec9 s\u1ed1 hi\u1ec7u su\u1ea5t quan tr\u1ecdng m\u00e0 Google \u0111ang \u01b0u ti\u00ean (<strong>Core Web Vitals<\/strong>).<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Cai-thien-toc-do-tai-trang-va-trai-nghiem-nguoi-dung-UX\"><\/span>C\u1ea3i thi\u1ec7n t\u1ed1c \u0111\u1ed9 t\u1ea3i trang v\u00e0 tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng (UX)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Vi\u1ec7c <strong>t\u0103ng t\u1ed1c \u0111\u1ed9 website b\u1eb1ng cache<\/strong> l\u00e0 l\u1ee3i \u00edch r\u00f5 r\u00e0ng nh\u1ea5t. Khi m\u1ed9t t\u00e0i nguy\u00ean \u0111\u01b0\u1ee3c t\u1ea3i t\u1eeb b\u1ed9 nh\u1edb cache c\u1ee5c b\u1ed9 (v\u00ed d\u1ee5: <strong>Browser Cache l\u00e0 g\u00ec<\/strong>) thay v\u00ec t\u1eeb Server \u1edf xa, th\u1eddi gian t\u1ea3i c\u00f3 th\u1ec3 gi\u1ea3m t\u1eeb h\u00e0ng tr\u0103m mili gi\u00e2y xu\u1ed1ng ch\u1ec9 c\u00f2n v\u00e0i ch\u1ee5c mili gi\u00e2y.<\/p>\n<ul>\n<li>Gi\u1ea3m th\u1eddi gian ph\u1ea3n h\u1ed3i m\u00e1y ch\u1ee7 (<strong>TTFB &#8211; Time To First Byte<\/strong>).<\/li>\n<li>Gi\u1ea3m \u0111\u1ed9 tr\u1ec5 m\u1ea1ng (<strong>Latency<\/strong>) v\u00ec y\u00eau c\u1ea7u kh\u00f4ng c\u1ea7n \u0111i qu\u00e3ng \u0111\u01b0\u1eddng xa.<\/li>\n<\/ul>\n<p>Tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng (UX) \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n r\u00f5 r\u1ec7t, \u0111\u1eb7c bi\u1ec7t khi ng\u01b0\u1eddi d\u00f9ng truy c\u1eadp l\u1ea1i trang web.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Toi-uu-diem-Google-PageSpeed-Insights\"><\/span>T\u1ed1i \u01b0u \u0111i\u1ec3m Google PageSpeed Insights<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>C\u00e1c c\u00f4ng c\u1ee5 \u0111\u00e1nh gi\u00e1 nh\u01b0 PageSpeed Insights ho\u1eb7c GTmetrix \u0111\u1ec1u ki\u1ec3m tra xem b\u1ea1n \u0111\u00e3 t\u1ed1i \u01b0u h\u00f3a cache ch\u01b0a. Cache gi\u00fap gi\u1ea3i quy\u1ebft c\u00e1c c\u1ea3nh b\u00e1o ph\u1ed5 bi\u1ebfn:<\/p>\n<ul>\n<li><strong>Serve static assets with an efficient cache policy<\/strong> (T\u1ed1i \u01b0u h\u00f3a <strong>Cache Header<\/strong>).<\/li>\n<li><strong>Reduce server response times<\/strong> (Gi\u1ea3m TTFB nh\u1edd <strong>Server Cache<\/strong>).<\/li>\n<\/ul>\n<p>Vi\u1ec7c gi\u1ea3i quy\u1ebft tri\u1ec7t \u0111\u1ec3 c\u00e1c c\u1ea3nh b\u00e1o n\u00e0y s\u1ebd tr\u1ef1c ti\u1ebfp <strong>t\u0103ng \u0111i\u1ec3m pagespeed<\/strong> v\u00e0 c\u1ea3i thi\u1ec7n th\u1ee9 h\u1ea1ng SEO.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Giam-tai-tai-nguyen-va-chi-phi-Hosting\"><\/span>Gi\u1ea3m t\u1ea3i t\u00e0i nguy\u00ean v\u00e0 chi ph\u00ed Hosting<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>T\u00e1c d\u1ee5ng c\u1ee7a cache<\/strong> kh\u00f4ng ch\u1ec9 d\u1eebng l\u1ea1i \u1edf t\u1ed1c \u0111\u1ed9. Khi m\u1ed9t t\u00e0i nguy\u00ean \u0111\u01b0\u1ee3c ph\u1ee5c v\u1ee5 t\u1eeb Cache, Server g\u1ed1c c\u1ee7a b\u1ea1n s\u1ebd kh\u00f4ng c\u1ea7n ph\u1ea3i x\u1eed l\u00fd y\u00eau c\u1ea7u \u0111\u00f3. \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0:<\/p>\n<ul>\n<li><strong>Gi\u1ea3m g\u00e1nh n\u1eb7ng<\/strong> CPU v\u00e0 RAM cho Hosting.<\/li>\n<li><strong>Ti\u1ebft ki\u1ec7m b\u0103ng th\u00f4ng<\/strong> Hosting, \u0111\u1eb7c bi\u1ec7t quan tr\u1ecdng v\u1edbi c\u00e1c g\u00f3i Hosting gi\u00e1 r\u1ebb ho\u1eb7c c\u00e1c website c\u00f3 l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp l\u1edbn.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Loi-ich-cua-Web-Cache\"><\/span>L\u1ee3i \u00edch c\u1ee7a Web Cache<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Web cache mang l\u1ea1i nhi\u1ec1u l\u1ee3i \u00edch v\u01b0\u1ee3t tr\u1ed9i cho website, gi\u00fap t\u1ed1i \u01b0u c\u1ea3 v\u1ec1 t\u1ed1c \u0111\u1ed9 v\u00e0 kh\u1ea3 n\u0103ng ch\u1ecbu t\u1ea3i. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 nh\u1eefng l\u1ee3i \u00edch n\u1ed5i b\u1eadt m\u00e0 web cache mang l\u1ea1i:<\/p>\n<ul>\n<li><strong>Gi\u1ea3m t\u1ea3i cho m\u00e1y ch\u1ee7<\/strong>: Khi ng\u01b0\u1eddi d\u00f9ng truy c\u1eadp v\u00e0o website, m\u00e1y ch\u1ee7 ph\u1ea3i x\u1eed l\u00fd y\u00eau c\u1ea7u v\u00e0 cung c\u1ea5p c\u00e1c t\u00e0i nguy\u00ean c\u1ea7n thi\u1ebft. Web cache gi\u00fap gi\u1ea3m g\u00e1nh n\u1eb7ng n\u00e0y b\u1eb1ng c\u00e1ch l\u01b0u tr\u1eef c\u00e1c t\u00e0i nguy\u00ean ph\u1ed5 bi\u1ebfn v\u00e0 cung c\u1ea5p ch\u00fang tr\u1ef1c ti\u1ebfp t\u1eeb b\u1ed9 nh\u1edb \u0111\u1ec7m. \u0110i\u1ec1u n\u00e0y gi\u00fap gi\u1ea3m s\u1ed1 l\u01b0\u1ee3ng y\u00eau c\u1ea7u ph\u1ea3i g\u1eedi \u0111\u1ebfn m\u00e1y ch\u1ee7, ti\u1ebft ki\u1ec7m t\u00e0i nguy\u00ean v\u00e0 t\u0103ng t\u00ednh \u1ed5n \u0111\u1ecbnh.<\/li>\n<li><strong>T\u0103ng t\u1ed1c \u0111\u1ed9 truy c\u1eadp<\/strong>: Nh\u1edd vi\u1ec7c l\u01b0u tr\u1eef d\u1eef li\u1ec7u trong b\u1ed9 nh\u1edb \u0111\u1ec7m, web cache gi\u00fap truy xu\u1ea5t d\u1eef li\u1ec7u g\u1ea7n nh\u01b0 ngay l\u1eadp t\u1ee9c m\u1ed7i khi ng\u01b0\u1eddi d\u00f9ng y\u00eau c\u1ea7u. T\u1ed1c \u0111\u1ed9 t\u1ea3i trang nhanh h\u01a1n kh\u00f4ng ch\u1ec9 c\u1ea3i thi\u1ec7n tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng m\u00e0 c\u00f2n gi\u00fap gi\u1eef ch\u00e2n h\u1ecd l\u00e2u h\u01a1n tr\u00ean website.<\/li>\n<li><strong>Ti\u1ebft ki\u1ec7m b\u0103ng th\u00f4ng<\/strong>: Web cache gi\u00fap gi\u1ea3m thi\u1ec3u l\u01b0\u1ee3ng b\u0103ng th\u00f4ng ti\u00eau t\u1ed1n b\u1eb1ng c\u00e1ch h\u1ea1n ch\u1ebf c\u00e1c y\u00eau c\u1ea7u l\u1eb7p l\u1ea1i t\u1eeb ng\u01b0\u1eddi d\u00f9ng. M\u00e1y ch\u1ee7 kh\u00f4ng c\u1ea7n x\u1eed l\u00fd c\u00f9ng m\u1ed9t y\u00eau c\u1ea7u nhi\u1ec1u l\u1ea7n, gi\u00fap ti\u1ebft ki\u1ec7m b\u0103ng th\u00f4ng v\u00e0 t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t m\u1ea1ng.<\/li>\n<li><strong>T\u0103ng kh\u1ea3 n\u0103ng \u0111\u00e1p \u1ee9ng l\u01b0u l\u01b0\u1ee3ng l\u1edbn<\/strong>: V\u1edbi s\u1ef1 h\u1ed7 tr\u1ee3 c\u1ee7a web cache, m\u00e1y ch\u1ee7 c\u00f3 th\u1ec3 x\u1eed l\u00fd l\u01b0\u1ee3ng truy c\u1eadp l\u1edbn h\u01a1n t\u1eeb 3-4 l\u1ea7n so v\u1edbi c\u00e1c m\u00e1y ch\u1ee7 kh\u00f4ng s\u1eed d\u1ee5ng cache. \u0110i\u1ec1u n\u00e0y \u0111\u1eb7c bi\u1ec7t h\u1eefu \u00edch trong c\u00e1c s\u1ef1 ki\u1ec7n t\u0103ng \u0111\u1ed9t bi\u1ebfn l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp nh\u01b0 khuy\u1ebfn m\u00e3i ho\u1eb7c s\u1ef1 ki\u1ec7n tr\u1ef1c tuy\u1ebfn.<\/li>\n<li><strong>C\u1ea3i thi\u1ec7n SEO v\u00e0 Web Vitals<\/strong>: M\u1ed9t trong nh\u1eefng l\u1ee3i \u00edch quan tr\u1ecdng nh\u1ea5t c\u1ee7a web cache l\u00e0 c\u1ea3i thi\u1ec7n t\u1ed1c \u0111\u1ed9 t\u1ea3i trang, y\u1ebfu t\u1ed1 quan tr\u1ecdng gi\u00fap Google d\u1ec5 d\u00e0ng thu th\u1eadp v\u00e0 index n\u1ed9i dung tr\u00ean trang. Ngo\u00e0i ra, vi\u1ec7c s\u1eed d\u1ee5ng cache c\u00f2n gi\u00fap n\u00e2ng cao c\u00e1c ch\u1ec9 s\u1ed1 quan tr\u1ecdng trong b\u1ed9 Web Vitals nh\u01b0 LCP (Largest Contentful Paint), FID (First Input Delay) v\u00e0 CLS (Cumulative Layout Shift). C\u00e1c ch\u1ec9 s\u1ed1 n\u00e0y gi\u00fap Google \u0111\u00e1nh gi\u00e1 website c\u1ee7a b\u1ea1n cao h\u01a1n, t\u1eeb \u0111\u00f3 c\u1ea3i thi\u1ec7n th\u1ee9 h\u1ea1ng SEO tr\u00ean c\u00f4ng c\u1ee5 t\u00ecm ki\u1ebfm.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Cac-thanh-phan-thuat-ngu-ky-thuat-trong-Web-Cache\"><\/span>C\u00e1c th\u00e0nh ph\u1ea7n &amp; thu\u1eadt ng\u1eef k\u1ef9 thu\u1eadt trong Web Cache<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>C\u00e1c th\u00e0nh ph\u1ea7n v\u00e0 thu\u1eadt ng\u1eef k\u1ef9 thu\u1eadt trong Web Cache bao g\u1ed3m nhi\u1ec1u lo\u1ea1i b\u1ed9 nh\u1edb \u0111\u1ec7m v\u00e0 c\u00e1c c\u01a1 ch\u1ebf qu\u1ea3n l\u00fd cache nh\u1eb1m t\u1ed1i \u01b0u t\u1ed1c \u0111\u1ed9 truy c\u1eadp v\u00e0 gi\u1ea3m t\u1ea3i cho h\u1ec7 th\u1ed1ng.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Cac-thanh-phan-chinh-cua-Web-Cache\"><\/span>C\u00e1c th\u00e0nh ph\u1ea7n ch\u00ednh c\u1ee7a Web Cache<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Cache ph\u00eda tr\u00ecnh duy\u1ec7t (Browser Cache): L\u01b0u tr\u1eef c\u00e1c t\u00e0i nguy\u00ean t\u0129nh nh\u01b0 h\u00ecnh \u1ea3nh, CSS, JavaScript ngay tr\u00ean tr\u00ecnh duy\u1ec7t ng\u01b0\u1eddi d\u00f9ng \u0111\u1ec3 truy c\u1eadp nhanh h\u01a1n khi quay l\u1ea1i trang web. Qu\u1ea3n l\u00fd b\u1edfi c\u00e1c thu\u1ed9c t\u00ednh HTTP nh\u01b0 Cache-Control, Expires, ETag, Last-Modified gi\u00fap quy\u1ebft \u0111\u1ecbnh d\u1eef li\u1ec7u n\u00e0o c\u1ea7n l\u01b0u v\u00e0 khi n\u00e0o c\u1ea7n l\u00e0m m\u1edbi d\u1eef li\u1ec7u.\u200b<\/p>\n<ul>\n<li><strong>Cache ph\u00eda m\u00e1y ch\u1ee7 (Server Cache)<\/strong>: L\u01b0u tr\u1eef d\u1eef li\u1ec7u tr\u00ean m\u00e1y ch\u1ee7 nh\u1eb1m gi\u1ea3m th\u1eddi gian x\u1eed l\u00fd v\u00e0 t\u1ea3i l\u1ea1i trang, bao g\u1ed3m:<\/li>\n<li><strong>Full-page cache<\/strong>: L\u01b0u to\u00e0n b\u1ed9 trang d\u01b0\u1edbi d\u1ea1ng HTML t\u0129nh \u0111\u1ec3 ph\u1ea3n h\u1ed3i nhanh c\u00e1c y\u00eau c\u1ea7u.\u200b<\/li>\n<li><strong>Object cache<\/strong>: L\u01b0u k\u1ebft qu\u1ea3 truy v\u1ea5n database \u0111\u1ec3 t\u00e1i s\u1eed d\u1ee5ng khi c\u00f3 truy v\u1ea5n t\u01b0\u01a1ng t\u1ef1, gi\u1ea3m t\u1ea3i cho database.\u200b<\/li>\n<li><strong>Fragment cache<\/strong>: L\u01b0u tr\u1eef c\u00e1c ph\u1ea7n nh\u1ecf c\u1ee7a trang nh\u01b0 widget, ch\u1ee9c n\u0103ng c\u1ee5 th\u1ec3 \u0111\u1ec3 gi\u1ea3m th\u1eddi gian t\u1ea3i.\u200b<\/li>\n<li><strong>CDN cache<\/strong>: L\u01b0u tr\u1eef b\u1ea3n sao d\u1eef li\u1ec7u tr\u00ean m\u1ea1ng l\u01b0\u1edbi m\u00e1y ch\u1ee7 CDN to\u00e0n c\u1ea7u \u0111\u1ec3 ng\u01b0\u1eddi d\u00f9ng truy c\u1eadp nhanh t\u1eeb m\u00e1y ch\u1ee7 g\u1ea7n nh\u1ea5t.\u200b<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Thuat-ngu-ky-thuat-pho-bien-trong-Web-Cache\"><\/span>Thu\u1eadt ng\u1eef k\u1ef9 thu\u1eadt ph\u1ed5 bi\u1ebfn trong Web Cache<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><strong>Cache Hit<\/strong>: Khi d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c t\u00ecm th\u1ea5y trong b\u1ed9 nh\u1edb cache, tr\u1ea3 v\u1ec1 ngay m\u00e0 kh\u00f4ng c\u1ea7n truy c\u1eadp d\u1eef li\u1ec7u g\u1ed1c, gi\u00fap gi\u1ea3m th\u1eddi gian ph\u1ea3n h\u1ed3i v\u00e0 t\u1ea3i m\u00e1y ch\u1ee7.\u200b<\/li>\n<li><strong>Cache Miss<\/strong>: Khi d\u1eef li\u1ec7u kh\u00f4ng t\u1ed3n t\u1ea1i trong cache, h\u1ec7 th\u1ed1ng ph\u1ea3i truy c\u1eadp ngu\u1ed3n d\u1eef li\u1ec7u g\u1ed1c \u0111\u1ec3 l\u1ea5y d\u1eef li\u1ec7u m\u1edbi v\u00e0 l\u01b0u v\u00e0o cache.\u200b<\/li>\n<li><strong>Invalidate Cache<\/strong>: Qu\u00e1 tr\u00ecnh l\u00e0m m\u1edbi ho\u1eb7c x\u00f3a d\u1eef li\u1ec7u trong cache khi d\u1eef li\u1ec7u g\u1ed1c thay \u0111\u1ed5i \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o t\u00ednh nh\u1ea5t qu\u00e1n.\u200b<\/li>\n<li><strong>Cache-Control<\/strong>: Thu\u1ed9c t\u00ednh HTTP quy \u0111\u1ecbnh c\u00e1ch d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef v\u00e0 l\u00e0m m\u1edbi trong cache nh\u01b0 no-cache, max-age, public, private.\u200b<\/li>\n<li><strong>ETag (Entity Tag)<\/strong>: Th\u1ebb x\u00e1c nh\u1eadn phi\u00ean b\u1ea3n d\u1eef li\u1ec7u \u0111\u1ec3 ki\u1ec3m tra li\u1ec7u d\u1eef li\u1ec7u trong cache c\u00f2n h\u1ee3p l\u1ec7 hay kh\u00f4ng.\u200b<\/li>\n<li><strong>Expires v\u00e0 Max-Age<\/strong>: X\u00e1c \u0111\u1ecbnh th\u1eddi gian t\u1ed3n t\u1ea1i t\u1ed1i \u0111a c\u1ee7a d\u1eef li\u1ec7u trong cache tr\u01b0\u1edbc khi c\u1ea7n \u0111\u01b0\u1ee3c l\u00e0m m\u1edbi.\u200b<\/li>\n<li><strong>Validation<\/strong>: C\u01a1 ch\u1ebf \u0111\u1ec3 y\u00eau c\u1ea7u m\u00e1y ch\u1ee7 x\u00e1c minh t\u00ednh h\u1ee3p l\u1ec7 c\u1ee7a d\u1eef li\u1ec7u cache tr\u01b0\u1edbc khi s\u1eed d\u1ee5ng.\u200b<\/li>\n<li><strong>Cache Lock<\/strong>: C\u01a1 ch\u1ebf kh\u00f3a cache khi nhi\u1ec1u y\u00eau c\u1ea7u c\u00f9ng truy v\u1ea5n m\u1ed9t d\u1eef li\u1ec7u ch\u01b0a c\u00f3 trong cache \u0111\u1ec3 tr\u00e1nh truy v\u1ea5n \u0111\u1ed3ng th\u1eddi g\u00e2y qu\u00e1 t\u1ea3i.\u200b<\/li>\n<\/ul>\n<p>Nh\u01b0 v\u1eady, Web Cache bao g\u1ed3m c\u00e1c b\u1ed9 nh\u1edb \u0111\u1ec7m ph\u00e2n t\u1ea7ng t\u1eeb tr\u00ecnh duy\u1ec7t \u0111\u1ebfn m\u00e1y ch\u1ee7 v\u00e0 CDN, c\u00f9ng nhi\u1ec1u thu\u1eadt ng\u1eef k\u1ef9 thu\u1eadt li\u00ean quan \u0111\u1ebfn vi\u1ec7c l\u01b0u tr\u1eef, ki\u1ec3m tra, l\u00e0m m\u1edbi v\u00e0 qu\u1ea3n l\u00fd d\u1eef li\u1ec7u trong b\u1ed9 nh\u1edb t\u1ea1m nh\u1eb1m t\u1ed1i \u01b0u t\u1ed1c \u0111\u1ed9 v\u00e0 hi\u1ec7u su\u1ea5t truy c\u1eadp web.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"3-Tang-Web-Cache-quan-trong-va-cach-quan-ly\"><\/span>3 T\u1ea7ng Web Cache quan tr\u1ecdng v\u00e0 c\u00e1ch qu\u1ea3n l\u00fd<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Vi\u1ec7c hi\u1ec3u <strong>Web Cache l\u00e0 g\u00ec<\/strong> c\u1ea7n \u0111i k\u00e8m v\u1edbi vi\u1ec7c ph\u00e2n bi\u1ec7t c\u00e1c t\u1ea7ng cache. \u0110\u1ec3 t\u1ed1i \u01b0u t\u1ed1c \u0111\u1ed9 t\u1ed1i \u0111a, b\u1ea1n c\u1ea7n qu\u1ea3n l\u00fd t\u1ed1t c\u1ea3 <strong>3 t\u1ea7ng Web Cache<\/strong> n\u00e0y.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Browser-Cache-Client-Side-Caching\"><\/span>Browser Cache (Client-Side Caching)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>Browser Cache l\u00e0 g\u00ec<\/strong>? \u0110\u00e2y l\u00e0 t\u1ea7ng cache \u0111\u1ea7u ti\u00ean v\u00e0 g\u1ea7n ng\u01b0\u1eddi d\u00f9ng nh\u1ea5t. Tr\u00ecnh duy\u1ec7t (Chrome, Firefox) l\u01b0u tr\u1eef b\u1ea3n sao c\u00e1c file t\u0129nh (CSS, JS, h\u00ecnh \u1ea3nh) tr\u1ef1c ti\u1ebfp tr\u00ean m\u00e1y t\u00ednh c\u1ee7a ng\u01b0\u1eddi d\u00f9ng.<\/p>\n<p><strong>Qu\u1ea3n l\u00fd:<\/strong> \u0110\u01b0\u1ee3c ki\u1ec3m so\u00e1t b\u1edfi Header <strong><code>Cache-Control<\/code><\/strong> m\u00e0 Server g\u1ed1c g\u1eedi \u0111i. Khi ng\u01b0\u1eddi d\u00f9ng truy c\u1eadp l\u1ea1i, t\u1ed1c \u0111\u1ed9 l\u00e0 t\u1ee9c th\u00ec v\u00ec file \u0111\u00e3 c\u00f3 s\u1eb5n.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Server-Cache-Proxy-Cache-Server-Side-Cache\"><\/span>Server Cache (Proxy Cache &amp; Server-Side Cache)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>T\u1ea7ng cache n\u00e0y n\u1eb1m tr\u00ean m\u00e1y ch\u1ee7 Hosting c\u1ee7a b\u1ea1n.<\/p>\n<ul>\n<li><strong>Proxy Cache:<\/strong> C\u00e1c Server trung gian nh\u01b0 <strong>Varnish<\/strong> ho\u1eb7c <strong>Nginx<\/strong> l\u01b0u tr\u1eef b\u1ea3n sao c\u1ee7a c\u00e1c trang HTML \u0111\u00e3 \u0111\u01b0\u1ee3c x\u1eed l\u00fd (Full Page Cache) \u0111\u1ec3 ph\u1ee5c v\u1ee5 cho nhi\u1ec1u ng\u01b0\u1eddi d\u00f9ng.<\/li>\n<li><strong>Server-Side Cache:<\/strong> C\u00e1c c\u00f4ng ngh\u1ec7 nh\u01b0 <strong>Redis<\/strong> ho\u1eb7c <strong>Memcached<\/strong> l\u01b0u tr\u1eef d\u1eef li\u1ec7u truy v\u1ea5n c\u01a1 s\u1edf d\u1eef li\u1ec7u (Database Queries) ho\u1eb7c c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng PHP \u0111\u00e3 \u0111\u01b0\u1ee3c x\u1eed l\u00fd, gi\u00fap Backend Server t\u1ea1o ra trang nhanh h\u01a1n.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"CDN-Cache-Content-Delivery-Network\"><\/span>CDN Cache (Content Delivery Network)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>CDN Cache<\/strong> l\u00e0 t\u1ea7ng cache xa nh\u1ea5t Server g\u1ed1c, nh\u01b0ng l\u1ea1i g\u1ea7n ng\u01b0\u1eddi d\u00f9ng v\u1ec1 m\u1eb7t \u0111\u1ecba l\u00fd.<\/p>\n<ul>\n<li><strong>C\u01a1 ch\u1ebf:<\/strong> <strong>CDN<\/strong> (nh\u01b0 Cloudflare, Akamai) c\u00f3 c\u00e1c m\u00e1y ch\u1ee7 \u0111\u1eb7t t\u1ea1i nhi\u1ec1u <strong>Edge Locations<\/strong> tr\u00ean to\u00e0n th\u1ebf gi\u1edbi. B\u1ea3n sao c\u1ee7a t\u00e0i nguy\u00ean t\u0129nh \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef tr\u00ean c\u00e1c m\u00e1y ch\u1ee7 Edge n\u00e0y.<\/li>\n<li><strong>L\u1ee3i \u00edch:<\/strong> Khi ng\u01b0\u1eddi d\u00f9ng \u1edf H\u00e0 N\u1ed9i truy c\u1eadp, CDN s\u1ebd ph\u1ee5c v\u1ee5 h\u1ecd t\u1eeb m\u00e1y ch\u1ee7 Edge \u1edf Vi\u1ec7t Nam, gi\u00fap gi\u1ea3m \u0111\u1ed9 tr\u1ec5 m\u1ea1ng xuy\u00ean l\u1ee5c \u0111\u1ecba.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Nhung-loi-thuong-gap-khi-su-dung-Web-Cache\"><\/span>Nh\u1eefng l\u1ed7i th\u01b0\u1eddng g\u1eb7p khi s\u1eed d\u1ee5ng Web Cache<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Vi\u1ec7c <strong>c\u1ea5u h\u00ecnh cache<\/strong> sai c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn <strong>l\u1ed7i cache<\/strong> nghi\u00eam tr\u1ecdng, g\u00e2y \u1ea3nh h\u01b0\u1edfng x\u1ea5u \u0111\u1ebfn UX v\u00e0 uy t\u00edn c\u1ee7a website.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Cache-khong-cap-nhat-noi-dung-moi\"><\/span>Cache kh\u00f4ng c\u1eadp nh\u1eadt n\u1ed9i dung m\u1edbi<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0110\u00e2y l\u00e0 l\u1ed7i ph\u1ed5 bi\u1ebfn nh\u1ea5t (<strong>Stale Content<\/strong>).<\/p>\n<ul>\n<li><strong>L\u00fd do:<\/strong> B\u1ea1n \u0111\u00e3 c\u1eadp nh\u1eadt b\u00e0i vi\u1ebft, nh\u01b0ng Server\/Browser v\u1eabn hi\u1ec3n th\u1ecb b\u1ea3n c\u0169 v\u00ec TTL ch\u01b0a h\u1ebft h\u1ea1n.<\/li>\n<li><strong>X\u1eed l\u00fd:<\/strong> C\u1ea7n th\u1ef1c hi\u1ec7n <strong>x\u00f3a cache l\u00e0 g\u00ec<\/strong> (Purge) tr\u00ean to\u00e0n b\u1ed9 c\u00e1c t\u1ea7ng cache (Plugin, CDN) ngay sau khi c\u1eadp nh\u1eadt n\u1ed9i dung.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Cache-sai-du-lieu-user\"><\/span>Cache sai d\u1eef li\u1ec7u user<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>L\u1ed7i n\u00e0y x\u1ea3y ra khi n\u1ed9i dung c\u00e1 nh\u00e2n h\u00f3a (v\u00ed d\u1ee5: gi\u1ecf h\u00e0ng, t\u00ean ng\u01b0\u1eddi d\u00f9ng) b\u1ecb l\u01b0u tr\u1eef nh\u1ea7m v\u00e0 hi\u1ec3n th\u1ecb cho ng\u01b0\u1eddi d\u00f9ng kh\u00e1c.<\/p>\n<ul>\n<li><strong>L\u00fd do:<\/strong> Thi\u1ebfu Header <code>Cache-Control: private<\/code> ho\u1eb7c thi\u1ebfu ki\u1ec3m tra Cookie\/Session.<\/li>\n<li><strong>X\u1eed l\u00fd:<\/strong> \u0110\u1ea3m b\u1ea3o trang c\u00e1 nh\u00e2n h\u00f3a kh\u00f4ng bao gi\u1edd \u0111\u01b0\u1ee3c <strong>Server Cache<\/strong> ho\u1eb7c <strong>CDN Cache<\/strong> b\u1eb1ng c\u00e1ch thi\u1ebft l\u1eadp <strong><code>no-cache<\/code><\/strong> ho\u1eb7c <strong><code>private<\/code><\/strong>.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Cache-nham-cookiesession\"><\/span>Cache nh\u1ea7m cookie\/session<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>T\u01b0\u01a1ng t\u1ef1 l\u1ed7i tr\u00ean, c\u00e1c th\u00f4ng tin \u0111\u1ecbnh danh ng\u01b0\u1eddi d\u00f9ng (Cookies) b\u1ecb l\u01b0u tr\u1eef nh\u1ea7m, khi\u1ebfn c\u00e1c y\u00eau c\u1ea7u sau \u0111\u00f3 b\u1ecb \u0111\u1ecbnh tuy\u1ebfn sai.<\/p>\n<p><strong>X\u1eed l\u00fd:<\/strong> C\u1ea5u h\u00ecnh Server (Nginx\/Varnish) \u0111\u1ec3 lu\u00f4n b\u1ecf qua (bypass) cache n\u1ebfu y\u00eau c\u1ea7u c\u00f3 ch\u1ee9a Cookie li\u00ean quan \u0111\u1ebfn phi\u00ean \u0111\u0103ng nh\u1eadp.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Khong-xoa-duoc-cache-Purge-Error\"><\/span>Kh\u00f4ng x\u00f3a \u0111\u01b0\u1ee3c cache (Purge Error)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Th\u01b0\u1eddng x\u1ea3y ra v\u1edbi CDN.<\/p>\n<ul>\n<li><strong>L\u00fd do:<\/strong> CDN c\u00f3 th\u1ec3 m\u1ea5t v\u00e0i ph\u00fat \u0111\u1ec3 lan truy\u1ec1n y\u00eau c\u1ea7u x\u00f3a cache \u0111\u1ebfn t\u1ea5t c\u1ea3 c\u00e1c Edge Locations.<\/li>\n<li><strong>X\u1eed l\u00fd:<\/strong> Ch\u1edd \u0111\u1ee3i, ho\u1eb7c ki\u1ec3m tra log c\u1ee7a CDN \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o y\u00eau c\u1ea7u <strong>Purge Cache<\/strong> \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e1c nh\u1eadn.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Cac-cong-cu-va-giai-phap-trien-khai-Web-Cache-thuc-te\"><\/span>C\u00e1c c\u00f4ng c\u1ee5 v\u00e0 gi\u1ea3i ph\u00e1p tri\u1ec3n khai Web Cache th\u1ef1c t\u1ebf<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>T\u0103ng t\u1ed1c website b\u1eb1ng cache<\/strong> \u0111\u00f2i h\u1ecfi c\u00f4ng c\u1ee5 h\u1ed7 tr\u1ee3. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 c\u00e1c gi\u1ea3i ph\u00e1p th\u1ef1c t\u1ebf cho Webmaster:<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Plugin-Cache-cho-nen-tang-WordPress\"><\/span>Plugin Cache cho n\u1ec1n t\u1ea3ng WordPress<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>V\u1edbi WordPress, vi\u1ec7c qu\u1ea3n l\u00fd cache d\u1ec5 d\u00e0ng h\u01a1n nh\u1edd c\u00e1c plugin chuy\u00ean bi\u1ec7t. C\u00e1c plugin n\u00e0y th\u01b0\u1eddng t\u00edch h\u1ee3p s\u1eb5n <strong>Browser Cache<\/strong> v\u00e0 <strong>Server Cache<\/strong> (File-based cache).<\/p>\n<ul>\n<li><strong>WP Rocket:<\/strong> Plugin tr\u1ea3 ph\u00ed \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 cao, t\u00edch h\u1ee3p nhi\u1ec1u t\u00ednh n\u0103ng t\u1ed1i \u01b0u nh\u01b0 Lazy Load, Minification, v\u00e0 T\u1ed1i \u01b0u Database.<\/li>\n<li><strong>LiteSpeed Cache:<\/strong> Plugin mi\u1ec5n ph\u00ed, ho\u1ea1t \u0111\u1ed9ng m\u1ea1nh m\u1ebd nh\u1ea5t khi Hosting c\u1ee7a b\u1ea1n ch\u1ea1y Web Server LiteSpeed. N\u00f3 c\u00f3 kh\u1ea3 n\u0103ng k\u1ebft h\u1ee3p c\u00e1c t\u1ea7ng cache s\u00e2u h\u01a1n (Memcached, Redis).<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Dich-vu-CDN-hang-dau-Cloudflare-Akamai\"><\/span>D\u1ecbch v\u1ee5 CDN h\u00e0ng \u0111\u1ea7u (Cloudflare, Akamai)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>CDN l\u00e0 t\u1ea7ng cache kh\u00f4ng th\u1ec3 thi\u1ebfu \u0111\u1ec3 ph\u00e2n ph\u1ed1i t\u00e0i nguy\u00ean to\u00e0n c\u1ea7u.<\/p>\n<ul>\n<li><strong>Cloudflare:<\/strong> D\u1ecbch v\u1ee5 CDN ph\u1ed5 bi\u1ebfn nh\u1ea5t hi\u1ec7n nay (c\u00f3 c\u1ea3 g\u00f3i mi\u1ec5n ph\u00ed), gi\u00fap b\u1ea3o m\u1eadt v\u00e0 t\u0103ng t\u1ed1c website b\u1eb1ng c\u00e1ch l\u01b0u tr\u1eef cache t\u1ea1i h\u01a1n 270 Edge Locations tr\u00ean to\u00e0n c\u1ea7u.<\/li>\n<li><strong>Akamai:<\/strong> Ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c doanh nghi\u1ec7p l\u1edbn, cung c\u1ea5p m\u1ea1ng l\u01b0\u1edbi ph\u00e2n ph\u1ed1i n\u1ed9i dung to\u00e0n di\u1ec7n v\u00e0 b\u1ea3o m\u1eadt cao c\u1ea5p.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Cach-cai-dat-Web-Cache-tren-website-WordPress\"><\/span>C\u00e1ch c\u00e0i \u0111\u1eb7t Web Cache tr\u00ean website WordPress<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Vi\u1ec7c c\u00e0i \u0111\u1eb7t web cache cho website WordPress c\u00f3 th\u1ec3 gi\u00fap t\u0103ng t\u1ed1c \u0111\u1ed9 t\u1ea3i trang \u0111\u00e1ng k\u1ec3, c\u1ea3i thi\u1ec7n tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng v\u00e0 th\u1ee9 h\u1ea1ng SEO. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 c\u00e1c c\u00e1ch ph\u1ed5 bi\u1ebfn \u0111\u1ec3 c\u00e0i \u0111\u1eb7t web cache tr\u00ean website WordPress:<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Su-dung-Plugin-Caching\"><\/span>S\u1eed d\u1ee5ng Plugin Caching<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Hi\u1ec7n nay, c\u00f3 r\u1ea5t nhi\u1ec1u plugin caching, c\u1ea3 mi\u1ec5n ph\u00ed l\u1eabn tr\u1ea3 ph\u00ed, v\u1edbi nhi\u1ec1u t\u00ednh n\u0103ng kh\u00e1c nhau \u0111\u1ec3 b\u1ea1n l\u1ef1a ch\u1ecdn, ph\u00f9 h\u1ee3p v\u1edbi nhu c\u1ea7u c\u1ee5 th\u1ec3 c\u1ee7a t\u1eebng website. Sau \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 plugin ph\u1ed5 bi\u1ebfn:<\/p>\n<ul>\n<li><strong>WP Super Cache<\/strong>: \u0110\u00e2y l\u00e0 m\u1ed9t plugin mi\u1ec5n ph\u00ed, r\u1ea5t d\u1ec5 s\u1eed d\u1ee5ng v\u00e0 th\u00e2n thi\u1ec7n v\u1edbi ng\u01b0\u1eddi m\u1edbi b\u1eaft \u0111\u1ea7u. N\u00f3 cung c\u1ea5p c\u00e1c t\u00ednh n\u0103ng caching c\u01a1 b\u1ea3n, gi\u00fap t\u1ea1o ra c\u00e1c file HTML t\u0129nh t\u1eeb website c\u1ee7a b\u1ea1n. Khi ng\u01b0\u1eddi d\u00f9ng truy c\u1eadp, thay v\u00ec ph\u1ea3i x\u1eed l\u00fd t\u1ea5t c\u1ea3 c\u00e1c y\u00eau c\u1ea7u t\u1eeb c\u01a1 s\u1edf d\u1eef li\u1ec7u, server s\u1ebd ph\u1ee5c v\u1ee5 c\u00e1c file t\u0129nh n\u00e0y, gi\u00fap t\u0103ng t\u1ed1c \u0111\u1ed9 t\u1ea3i trang \u0111\u00e1ng k\u1ec3.<\/li>\n<li><strong>W3 Total Cache<\/strong>: Plugin n\u00e0y c\u0169ng mi\u1ec5n ph\u00ed nh\u01b0ng l\u1ea1i m\u1ea1nh m\u1ebd h\u01a1n v\u1edbi nhi\u1ec1u t\u00f9y ch\u1ecdn c\u1ea5u h\u00ecnh n\u00e2ng cao. W3 Total Cache kh\u00f4ng ch\u1ec9 h\u1ed7 tr\u1ee3 caching trang m\u00e0 c\u00f2n cho ph\u00e9p b\u1ea1n t\u1ed1i \u01b0u h\u00f3a c\u00e1c y\u1ebfu t\u1ed1 kh\u00e1c nh\u01b0 minify CSS, JavaScript v\u00e0 HTML, gi\u00fap website ho\u1ea1t \u0111\u1ed9ng m\u01b0\u1ee3t m\u00e0 h\u01a1n. \u0110\u00e2y l\u00e0 m\u1ed9t l\u1ef1a ch\u1ecdn tuy\u1ec7t v\u1eddi cho nh\u1eefng ai mu\u1ed1n t\u1ed1i \u01b0u h\u00f3a to\u00e0n di\u1ec7n hi\u1ec7u su\u1ea5t c\u1ee7a website.<\/li>\n<li><strong>LiteSpeed Cache<\/strong>: N\u1ebfu b\u1ea1n \u0111ang s\u1eed d\u1ee5ng m\u00e1y ch\u1ee7 LiteSpeed, th\u00ec plugin n\u00e0y l\u00e0 s\u1ef1 l\u1ef1a ch\u1ecdn ho\u00e0n h\u1ea3o. LiteSpeed Cache \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1eb7c bi\u1ec7t \u0111\u1ec3 t\u1eadn d\u1ee5ng t\u1ed1i \u0111a kh\u1ea3 n\u0103ng c\u1ee7a m\u00e1y ch\u1ee7 LiteSpeed, mang l\u1ea1i hi\u1ec7u su\u1ea5t caching v\u01b0\u1ee3t tr\u1ed9i so v\u1edbi c\u00e1c plugin kh\u00e1c. N\u00f3 kh\u00f4ng ch\u1ec9 gi\u00fap t\u0103ng t\u1ed1c \u0111\u1ed9 t\u1ea3i trang m\u00e0 c\u00f2n cung c\u1ea5p nhi\u1ec1u t\u00ednh n\u0103ng t\u1ed1i \u01b0u h\u00f3a kh\u00e1c.<\/li>\n<li><strong>WP Rocket<\/strong>: \u0110\u00e2y l\u00e0 m\u1ed9t plugin tr\u1ea3 ph\u00ed n\u1ed5i ti\u1ebfng v\u1edbi kh\u1ea3 n\u0103ng t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t cao v\u00e0 giao di\u1ec7n ng\u01b0\u1eddi d\u00f9ng th\u00e2n thi\u1ec7n. WP Rocket r\u1ea5t d\u1ec5 d\u00e0ng \u0111\u1ec3 c\u1ea5u h\u00ecnh, ngay c\u1ea3 \u0111\u1ed1i v\u1edbi nh\u1eefng ng\u01b0\u1eddi ch\u01b0a c\u00f3 kinh nghi\u1ec7m k\u1ef9 thu\u1eadt. Plugin n\u00e0y t\u1ef1 \u0111\u1ed9ng k\u00edch ho\u1ea1t c\u00e1c t\u00ednh n\u0103ng caching c\u1ea7n thi\u1ebft m\u00e0 kh\u00f4ng c\u1ea7n b\u1ea1n ph\u1ea3i th\u1ef1c hi\u1ec7n qu\u00e1 nhi\u1ec1u b\u01b0\u1edbc ph\u1ee9c t\u1ea1p.<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-19898\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/plugin-litespeed-cache.webp\" alt=\"plugin litespeed cache\" width=\"800\" height=\"418\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/plugin-litespeed-cache.webp 800w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/plugin-litespeed-cache-300x157.webp 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/plugin-litespeed-cache-768x401.webp 768w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/plugin-litespeed-cache-750x392.webp 750w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/p>\n<p>T\u00f3m l\u1ea1i, vi\u1ec7c l\u1ef1a ch\u1ecdn plugin caching ph\u00f9 h\u1ee3p s\u1ebd gi\u00fap b\u1ea1n c\u1ea3i thi\u1ec7n \u0111\u00e1ng k\u1ec3 hi\u1ec7u su\u1ea5t c\u1ee7a website WordPress. H\u00e3y c\u00e2n nh\u1eafc nhu c\u1ea7u v\u00e0 k\u1ef9 n\u0103ng c\u1ee7a b\u1ea1n \u0111\u1ec3 ch\u1ecdn ra gi\u1ea3i ph\u00e1p t\u1ed1t nh\u1ea5t cho m\u00ecnh.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Cac-buoc-cai-dat-Plugin-Caching\"><\/span>C\u00e1c b\u01b0\u1edbc c\u00e0i \u0111\u1eb7t Plugin Caching<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0110\u1ec3 b\u1eaft \u0111\u1ea7u s\u1eed d\u1ee5ng plugin caching tr\u00ean trang web WordPress c\u1ee7a b\u1ea1n, h\u00e3y l\u00e0m theo c\u00e1c b\u01b0\u1edbc d\u01b0\u1edbi \u0111\u00e2y m\u1ed9t c\u00e1ch chi ti\u1ebft:<\/p>\n<p><strong>B\u01b0\u1edbc 1: \u0110\u0103ng nh\u1eadp v\u00e0o b\u1ea3ng qu\u1ea3n tr\u1ecb WordPress<\/strong>: \u0110\u1ea7u ti\u00ean, b\u1ea1n c\u1ea7n truy c\u1eadp v\u00e0o trang qu\u1ea3n tr\u1ecb c\u1ee7a website WordPress b\u1eb1ng c\u00e1ch nh\u1eadp th\u00f4ng tin \u0111\u0103ng nh\u1eadp c\u1ee7a m\u00ecnh. Th\u00f4ng th\u01b0\u1eddng, \u0111\u1ecba ch\u1ec9 \u0111\u1ec3 \u0111\u0103ng nh\u1eadp s\u1ebd l\u00e0\u00a0<code>yourwebsite.com\/wp-admin<\/code>.<\/p>\n<p><strong>B\u01b0\u1edbc 2: Ch\u1ecdn m\u1ee5c Plugins<\/strong>: Sau khi \u0111\u00e3 v\u00e0o \u0111\u01b0\u1ee3c b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n, t\u00ecm v\u00e0 nh\u1ea5p v\u00e0o m\u1ee5c\u00a0<strong>Plugins<\/strong>\u00a0\u1edf thanh menu b\u00ean tr\u00e1i. T\u1ea1i \u0111\u00e2y, b\u1ea1n s\u1ebd th\u1ea5y danh s\u00e1ch c\u00e1c plugin hi\u1ec7n c\u00f3 tr\u00ean trang web c\u1ee7a m\u00ecnh.<\/p>\n<p><strong>B\u01b0\u1edbc 3: Th\u00eam m\u1edbi plugin<\/strong>: Ti\u1ebfp theo, ch\u1ecdn t\u00f9y ch\u1ecdn\u00a0<strong>Add New<\/strong>\u00a0(Th\u00eam m\u1edbi) \u0111\u1ec3 m\u1edf ra giao di\u1ec7n cho ph\u00e9p b\u1ea1n t\u00ecm ki\u1ebfm v\u00e0 c\u00e0i \u0111\u1eb7t c\u00e1c plugin m\u1edbi.<\/p>\n<p><strong>B\u01b0\u1edbc 4: T\u00ecm ki\u1ebfm plugin caching<\/strong>: Trong \u00f4 t\u00ecm ki\u1ebfm, h\u00e3y g\u00f5 t\u00ean c\u1ee7a plugin caching m\u00e0 b\u1ea1n mu\u1ed1n s\u1eed d\u1ee5ng, ch\u1eb3ng h\u1ea1n nh\u01b0 WP Super Cache. Plugin n\u00e0y r\u1ea5t ph\u1ed5 bi\u1ebfn v\u00e0 \u0111\u01b0\u1ee3c nhi\u1ec1u ng\u01b0\u1eddi d\u00f9ng \u0111\u00e1nh gi\u00e1 cao v\u1ec1 kh\u1ea3 n\u0103ng t\u1ed1i \u01b0u t\u1ed1c \u0111\u1ed9 t\u1ea3i trang.<\/p>\n<p><strong>B\u01b0\u1edbc 5: C\u00e0i \u0111\u1eb7t plugin<\/strong>: Khi t\u00ecm th\u1ea5y plugin mong mu\u1ed1n, b\u1ea1n s\u1ebd th\u1ea5y n\u00fat\u00a0<strong>Install Now<\/strong>\u00a0(C\u00e0i \u0111\u1eb7t). Nh\u1ea5n v\u00e0o n\u00fat n\u00e0y \u0111\u1ec3 b\u1eaft \u0111\u1ea7u qu\u00e1 tr\u00ecnh c\u00e0i \u0111\u1eb7t. H\u1ec7 th\u1ed1ng s\u1ebd t\u1ef1 \u0111\u1ed9ng t\u1ea3i xu\u1ed1ng v\u00e0 c\u00e0i \u0111\u1eb7t plugin v\u00e0o trang web c\u1ee7a b\u1ea1n.<\/p>\n<p><strong>B\u01b0\u1edbc 6: K\u00edch ho\u1ea1t plugin<\/strong>: Sau khi qu\u00e1 tr\u00ecnh c\u00e0i \u0111\u1eb7t ho\u00e0n t\u1ea5t, b\u1ea1n s\u1ebd th\u1ea5y n\u00fat\u00a0<strong>Activate<\/strong>\u00a0(K\u00edch ho\u1ea1t). Nh\u1ea5n v\u00e0o n\u00fat n\u00e0y \u0111\u1ec3 k\u00edch ho\u1ea1t plugin, gi\u00fap n\u00f3 ho\u1ea1t \u0111\u1ed9ng tr\u00ean trang web c\u1ee7a b\u1ea1n.<\/p>\n<p><strong>B\u01b0\u1edbc 7: C\u1ea5u h\u00ecnh c\u00e0i \u0111\u1eb7t plugin<\/strong>: Cu\u1ed1i c\u00f9ng, b\u1ea1n c\u1ea7n v\u00e0o ph\u1ea7n c\u00e0i \u0111\u1eb7t c\u1ee7a plugin v\u1eeba c\u00e0i \u0111\u1eb7t \u0111\u1ec3 c\u1ea5u h\u00ecnh c\u00e1c t\u00f9y ch\u1ecdn caching. M\u1ed7i plugin s\u1ebd c\u00f3 h\u01b0\u1edbng d\u1eabn c\u1ee5 th\u1ec3, v\u00ec v\u1eady h\u00e3y l\u00e0m theo c\u00e1c b\u01b0\u1edbc \u0111\u01b0\u1ee3c cung c\u1ea5p \u0111\u1ec3 thi\u1ebft l\u1eadp sao cho ph\u00f9 h\u1ee3p v\u1edbi nhu c\u1ea7u c\u1ee7a b\u1ea1n. Vi\u1ec7c c\u1ea5u h\u00ecnh \u0111\u00fang c\u00e1ch s\u1ebd gi\u00fap c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t v\u00e0 t\u1ed1c \u0111\u1ed9 t\u1ea3i trang c\u1ee7a website m\u1ed9t c\u00e1ch \u0111\u00e1ng k\u1ec3.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Cau-hoi-thuong-gap-ve-Web-Cache-FAQ\"><\/span>C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 Web Cache (FAQ)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"Web-cache-la-gi-va-tai-sao-can-thiet\"><\/span>Web cache l\u00e0 g\u00ec v\u00e0 t\u1ea1i sao c\u1ea7n thi\u1ebft?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>Tr\u1ea3 l\u1eddi:<\/strong> <strong>Web Cache<\/strong> l\u00e0 c\u01a1 ch\u1ebf l\u01b0u tr\u1eef t\u1ea1m th\u1eddi c\u00e1c b\u1ea3n sao t\u00e0i nguy\u00ean website. N\u00f3 c\u1ea7n thi\u1ebft \u0111\u1ec3 <strong>t\u0103ng t\u1ed1c \u0111\u1ed9 t\u1ea3i trang<\/strong> (v\u00ec kh\u00f4ng ph\u1ea3i t\u1ea3i l\u1ea1i to\u00e0n b\u1ed9 t\u00e0i nguy\u00ean t\u1eeb Server) v\u00e0 gi\u1ea3m t\u1ea3i cho m\u00e1y ch\u1ee7 Hosting.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Cache-co-anh-huong-den-SEO-khong\"><\/span>Cache c\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn SEO kh\u00f4ng?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>Tr\u1ea3 l\u1eddi:<\/strong> <strong>Cache kh\u00f4ng tr\u1ef1c ti\u1ebfp \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn SEO<\/strong>, nh\u01b0ng n\u00f3 \u1ea3nh h\u01b0\u1edfng gi\u00e1n ti\u1ebfp m\u1ed9t c\u00e1ch t\u00edch c\u1ef1c. Website t\u1ea3i nhanh h\u01a1n nh\u1edd cache s\u1ebd c\u1ea3i thi\u1ec7n <strong>Core Web Vitals<\/strong> v\u00e0 <strong>t\u0103ng \u0111i\u1ec3m PageSpeed<\/strong>, y\u1ebfu t\u1ed1 \u0111\u01b0\u1ee3c Google \u01b0u ti\u00ean khi x\u1ebfp h\u1ea1ng.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"TTL-la-gi-trong-cache\"><\/span>TTL l\u00e0 g\u00ec trong cache?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>Tr\u1ea3 l\u1eddi:<\/strong> <strong>TTL (Time-To-Live)<\/strong> l\u00e0 kho\u1ea3ng th\u1eddi gian (t\u00ednh b\u1eb1ng gi\u00e2y) m\u00e0 m\u1ed9t t\u00e0i nguy\u00ean \u0111\u01b0\u1ee3c ph\u00e9p l\u01b0u tr\u1eef trong cache tr\u01b0\u1edbc khi n\u00f3 \u0111\u01b0\u1ee3c coi l\u00e0 h\u1ebft h\u1ea1n. Sau khi h\u1ebft TTL, Server ph\u1ea3i ki\u1ec3m tra l\u1ea1i t\u00ednh h\u1ee3p l\u1ec7 c\u1ee7a t\u00e0i nguy\u00ean.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Cache-CDN-khac-gi-cache-trinh-duyet\"><\/span>Cache CDN kh\u00e1c g\u00ec cache tr\u00ecnh duy\u1ec7t?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>Tr\u1ea3 l\u1eddi:<\/strong> <strong>Browser Cache<\/strong> l\u01b0u tr\u1eef file tr\u00ean m\u00e1y t\u00ednh ng\u01b0\u1eddi d\u00f9ng v\u00e0 ch\u1ec9 ph\u1ee5c v\u1ee5 cho ng\u01b0\u1eddi d\u00f9ng \u0111\u00f3. <strong>CDN Cache<\/strong> l\u01b0u tr\u1eef file tr\u00ean c\u00e1c m\u00e1y ch\u1ee7 Edge c\u1ee7a CDN v\u00e0 ph\u1ee5c v\u1ee5 cho <strong>t\u1ea5t c\u1ea3 ng\u01b0\u1eddi d\u00f9ng<\/strong> g\u1ea7n khu v\u1ef1c \u0111\u00f3, gi\u00fap gi\u1ea3m \u0111\u1ed9 tr\u1ec5 v\u1eadt l\u00fd.<\/p>\n<p>Vi\u1ec7c hi\u1ec3u r\u00f5 Web Cache l\u00e0 g\u00ec kh\u00f4ng ch\u1ec9 l\u00e0 ki\u1ebfn th\u1ee9c k\u1ef9 thu\u1eadt m\u00e0 c\u00f2n l\u00e0 ch\u00eca kh\u00f3a \u0111\u1ec3 t\u0103ng t\u1ed1c website v\u00e0 t\u1ed1i \u01b0u SEO.<\/p>\n<p>\u0110\u1ec3 \u0111\u1ea1t t\u1ed1c \u0111\u1ed9 t\u1ea3i trang t\u1ed1i \u0111a (th\u01b0\u1eddng l\u00e0 d\u01b0\u1edbi 1 gi\u00e2y), b\u1ea1n ph\u1ea3i tri\u1ec3n khai m\u1ed9t chi\u1ebfn l\u01b0\u1ee3c cache \u0111a t\u1ea7ng (Browser, Server, CDN) \u0111\u1ed3ng b\u1ed9 v\u00e0 ph\u1ea3i lu\u00f4n ki\u1ec3m so\u00e1t t\u1ed1t c\u00e1c Cache Header v\u00e0 quy tr\u00ecnh Purge Cache.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>N\u1ebfu b\u1ea1n l\u00e0 ch\u1ee7 m\u1ed9t website, blogger, ho\u1eb7c SEOer, t\u1ed1c \u0111\u1ed9 t\u1ea3i trang lu\u00f4n l\u00e0 \u01b0u ti\u00ean h\u00e0ng \u0111\u1ea7u. M\u1ed9t website t\u1ea3i ch\u1eadm kh\u00f4ng ch\u1ec9 l\u00e0m m\u1ea5t kh\u00e1ch h\u00e0ng ti\u1ec1m n\u0103ng m\u00e0 c\u00f2n b\u1ecb Google PageSpeed Insights \u0111\u00e1nh gi\u00e1 th\u1ea5p. B\u00ed quy\u1ebft \u0111\u1ec3 \u0111\u1ea1t t\u1ed1c \u0111\u1ed9 t\u1ea3i &#8220;t\u1ee9c th\u00ec&#8221; cho website c\u1ee7a b\u1ea1n n\u1eb1m \u1edf<\/p>\n","protected":false},"author":2,"featured_media":19899,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[100],"tags":[],"class_list":["post-19888","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-website"],"_links":{"self":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/19888","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=19888"}],"version-history":[{"count":2,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/19888\/revisions"}],"predecessor-version":[{"id":34548,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/19888\/revisions\/34548"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/media\/19899"}],"wp:attachment":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/media?parent=19888"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/categories?post=19888"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/tags?post=19888"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}