{"id":12366836,"date":"2026-03-13T23:47:26","date_gmt":"2026-03-13T15:47:26","guid":{"rendered":"https:\/\/www.likacloud.com\/knowledge\/%e8%af%a6%e8%a7%a3cdn%ef%bc%9a%e4%bb%8e%e5%8e%9f%e7%90%86%e5%88%b0%e5%ae%9e%e8%b7%b5%ef%bc%8c%e6%8f%90%e5%8d%87%e7%bd%91%e7%ab%99%e6%80%a7%e8%83%bd%e4%b8%8e%e7%94%a8%e6%88%b7%e4%bd%93%e9%aa%8c\/"},"modified":"2026-03-13T23:53:02","modified_gmt":"2026-03-13T15:53:02","slug":"complete-guide-to-cdn-principles-practice-website-performance-user-experience","status":"publish","type":"knowledge_post","link":"https:\/\/www.likacloud.com\/vi\/knowledge\/cdn\/complete-guide-to-cdn-principles-practice-website-performance-user-experience\/","title":{"rendered":"Gi\u1ea3i th\u00edch chi ti\u1ebft v\u1ec1 CDN: T\u1eeb nguy\u00ean l\u00fd \u0111\u1ebfn th\u1ef1c h\u00e0nh \u2013 H\u01b0\u1edbng d\u1eabn to\u00e0n di\u1ec7n \u0111\u1ec3 n\u00e2ng cao hi\u1ec7u su\u1ea5t trang web v\u00e0 tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng"},"content":{"rendered":"

Trong k\u1ef7 nguy\u00ean Internet ph\u00e1t tri\u1ec3n nhanh ch\u00f3ng ng\u00e0y nay, t\u1ed1c \u0111\u1ed9 t\u1ea3i trang v\u00e0 t\u00ednh kh\u1ea3 d\u1ee5ng c\u1ee7a c\u00e1c trang web c\u00f3 m\u1ed1i li\u00ean h\u1ec7 tr\u1ef1c ti\u1ebfp \u0111\u1ebfn vi\u1ec7c gi\u1eef ch\u00e2n ng\u01b0\u1eddi d\u00f9ng v\u00e0 th\u00e0nh c\u00f4ng trong kinh doanh. M\u1ea1ng l\u01b0\u1edbi ph\u00e2n ph\u1ed1i n\u1ed9i dung (Content Distribution Network \u2013 CDN) l\u00e0 m\u1ed9t c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng Internet quan tr\u1ecdng, gi\u00fap gi\u1ea3i quy\u1ebft c\u00e1c v\u1ea5n \u0111\u1ec1 nh\u01b0 \u0111\u1ed9 tr\u1ec5 k\u1ebft n\u1ed1i, h\u1ea1n ch\u1ebf b\u0103ng th\u00f4ng v\u00e0 \u00e1p l\u1ef1c l\u00ean m\u00e1y ch\u1ee7 b\u1eb1ng c\u00e1ch l\u01b0u tr\u1eef n\u1ed9i dung trang web t\u1ea1i c\u00e1c \u0111i\u1ec3m cu\u1ed1i (edge nodes) tr\u00ean kh\u1eafp th\u1ebf gi\u1edbi. Gi\u00e1 tr\u1ecb c\u1ed1t l\u00f5i c\u1ee7a CDN n\u1eb1m \u1edf kh\u1ea3 n\u0103ng cho ph\u00e9p ng\u01b0\u1eddi d\u00f9ng truy c\u1eadp c\u00e1c t\u00e0i nguy\u00ean t\u1eeb m\u00e1y ch\u1ee7 g\u1ea7n nh\u1ea5t v\u1ec1 m\u1eb7t \u0111\u1ecba l\u00fd, t\u1eeb \u0111\u00f3 \u0111\u00e1ng k\u1ec3 n\u00e2ng cao t\u1ed1c \u0111\u1ed9 truy c\u1eadp.<\/p>\n\n\n\n

D\u00f9 l\u00e0 c\u00e1c trang web tin t\u1ee9c, n\u1ec1n t\u1ea3ng th\u01b0\u01a1ng m\u1ea1i \u0111i\u1ec7n t\u1eed, hay d\u1ecbch v\u1ee5 truy\u1ec1n ph\u00e1t video tr\u1ef1c tuy\u1ebfn, t\u1ea5t c\u1ea3 \u0111\u1ec1u ph\u1ee5 thu\u1ed9c r\u1ea5t nhi\u1ec1u v\u00e0o c\u00f4ng ngh\u1ec7 n\u00e0y \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o t\u00ednh \u1ed5n \u0111\u1ecbnh v\u00e0 hi\u1ec7u qu\u1ea3 c\u1ee7a d\u1ecbch v\u1ee5 m\u00ecnh cung c\u1ea5p. \u0110\u1ed1i v\u1edbi c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n, nh\u00e2n vi\u00ean v\u1eadn h\u00e0nh h\u1ec7 th\u1ed1ng, c\u0169ng nh\u01b0 c\u00e1c nh\u00e0 quy\u1ebft \u0111\u1ecbnh trong doanh nghi\u1ec7p, vi\u1ec7c hi\u1ec3u s\u00e2u v\u1ec1 c\u01a1 ch\u1ebf ho\u1ea1t \u0111\u1ed9ng c\u1ee7a c\u00f4ng ngh\u1ec7 n\u00e0y v\u00e0 n\u1eafm v\u1eefng c\u00e1c chi\u1ebfn l\u01b0\u1ee3c l\u1ef1a ch\u1ecdn, c\u1ea5u h\u00ecnh ph\u00f9 h\u1ee3p \u0111\u00e3 tr\u1edf th\u00e0nh m\u1ed9t k\u1ef9 n\u0103ng thi\u1ebft y\u1ebfu.<\/p>\n\n\n\n

Ph\u00e2n t\u00edch s\u00e2u v\u1ec1 c\u01a1 ch\u1ebf ho\u1ea1t \u0111\u1ed9ng c\u1ee7a CDN (Content Delivery Network)<\/h2>\n\n\n\n

M\u1ea1ng l\u01b0\u1edbi ph\u00e2n ph\u1ed1i n\u1ed9i dung (Content Distribution Network \u2013 CDN) kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t c\u00f4ng ngh\u1ec7 \u0111\u01a1n l\u1ebb, m\u00e0 l\u00e0 m\u1ed9t h\u1ec7 th\u1ed1ng ph\u1ee9c t\u1ea1p \u0111\u01b0\u1ee3c t\u1ea1o th\u00e0nh t\u1eeb nhi\u1ec1u th\u00e0nh ph\u1ea7n ho\u1ea1t \u0111\u1ed9ng c\u00f9ng nhau. Tri\u1ebft l\u00fd thi\u1ebft k\u1ebf c\u1ee7a n\u00f3 d\u1ef1a tr\u00ean m\u1ed9t \u00fd t\u01b0\u1edfng \u0111\u01a1n gi\u1ea3n: \u0111\u01b0a n\u1ed9i dung \u0111\u1ebfn g\u1ea7n ng\u01b0\u1eddi d\u00f9ng h\u01a1n.<\/p>\n

\u0110\u1ecdc th\u00eam CDN To\u00e0n Di\u1ec7n: T\u1eeb Nguy\u00ean L\u00fd Ho\u1ea1t \u0110\u1ed9ng \u0110\u1ebfn Th\u1ef1c H\u00e0nh L\u1ef1a Ch\u1ecdn, T\u0103ng T\u1ed1c Hi\u1ec7u Su\u1ea5t Website C\u1ee7a B\u1ea1n<\/a>\u3002<\/p>\n\n\n\n\n

Ki\u1ebfn tr\u00fac c\u1ed1t l\u00f5i: Trung t\u00e2m v\u00e0 Bi\u00ean m\u1ea1ng<\/h3>\n\n\n\n

M\u1ed9t m\u1ea1ng l\u01b0\u1edbi truy\u1ec1n th\u00f4ng \u0111i\u1ec3n h\u00ecnh th\u01b0\u1eddng bao g\u1ed3m c\u00e1c b\u1ed9 ph\u1eadn ch\u00ednh sau: m\u00e1y ch\u1ee7 ngu\u1ed3n (source server), n\u00fat trung t\u00e2m (central node) v\u00e0 n\u00fat bi\u00ean (edge node). M\u00e1y ch\u1ee7 ngu\u1ed3n l\u00e0 ngu\u1ed3n g\u1ed1c ban \u0111\u1ea7u c\u1ee7a n\u1ed9i dung, t\u1ee9c l\u00e0 m\u00e1y ch\u1ee7 thu\u1ed9c s\u1edf h\u1eefu c\u1ee7a ch\u00ednh kh\u00e1ch h\u00e0ng. N\u00fat trung t\u00e2m, \u0111\u00f4i khi c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 n\u00fat \u0111\u1ec7m c\u1ea5p hai (secondary cache node), c\u00f3 nhi\u1ec7m v\u1ee5 l\u1ea5y n\u1ed9i dung t\u1eeb m\u00e1y ch\u1ee7 ngu\u1ed3n v\u00e0 ph\u00e2n ph\u1ed1i ch\u00fang \u0111\u1ebfn m\u1ea1ng l\u01b0\u1edbi c\u00e1c n\u00fat bi\u00ean. N\u00fat bi\u00ean, c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u0111i\u1ec3m truy c\u1eadp (access point), l\u00e0 c\u00e1c m\u00e1y ch\u1ee7 ph\u00eda tr\u01b0\u1edbc (front-end servers) tr\u1ef1c ti\u1ebfp ph\u1ee5c v\u1ee5 ng\u01b0\u1eddi d\u00f9ng cu\u1ed1i; ch\u00fang \u0111\u01b0\u1ee3c \u0111\u1eb7t r\u1ed9ng r\u00e3i trong c\u00e1c trung t\u00e2m d\u1eef li\u1ec7u c\u1ee7a c\u00e1c nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 m\u1ea1ng, \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c cung c\u1ea5p d\u1ecbch v\u1ee5 \u0111\u1ebfn ng\u01b0\u1eddi d\u00f9ng cu\u1ed1i.<\/p>\n\n

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\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"\\nbunny.net\r\n\t\t\t\t\t\t\t\t\t\r\n\t\t\t<\/div>\r\n\t\t\t\r\n\t\t\t\r\n\t\t\t
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\r\n\t\t\t\t\t\\nbunny.net CDN<\/strong>\r\n\t\t\t\t\t\t\t\t\t<\/div>\r\n\t\t\t<\/div>\r\n\t\t<\/div>\r\n\t\t\t\tChi ph\u00ed ch\u1ec9 t\u1eeb 1 \u0111\u00f4 la m\u1ed7i th\u00e1ng, v\u1edbi m\u1ee9c ph\u00ed r\u00f5 r\u00e0ng v\u00e0 kh\u00f4ng c\u00f3 chi ph\u00ed \u1ea9n. C\u00e1c t\u00ednh n\u0103ng bao g\u1ed3m l\u01b0u tr\u1eef v\u0129nh vi\u1ec5n, gi\u00e1m s\u00e1t theo th\u1eddi gian th\u1ef1c, b\u1ea3o v\u1ec7 DDoS v\u00e0 ch\u1ee9ng ch\u1ec9 SSL mi\u1ec5n ph\u00ed. \u0110\u1eb7c bi\u1ec7t, n\u00f3 c\u00f2n \u0111\u01b0\u1ee3c t\u1ed1i \u01b0u h\u00f3a cho ph\u00e1t tr\u1ef1c tuy\u1ebfn video v\u00e0 cung c\u1ea5p m\u1ed9t m\u00f4 h\u00ecnh thanh to\u00e1n linh ho\u1ea1t theo m\u1ee9c s\u1eed d\u1ee5ng.<\/span>\r\n\t\t\t\t
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Kh\u00f4ng c\u1ea7n th\u1ebb t\u00edn d\u1ee5ng, d\u00f9ng th\u1eed mi\u1ec5n ph\u00ed trong 14 ng\u00e0y<\/div>\r\n\t\t\t\t\t\t\t\t\t\t\t\tTruy c\u1eadp m\u1ea1ng l\u01b0\u1edbi ph\u00e2n ph\u1ed1i n\u1ed9i dung (CDN) c\u1ee7a bunny.net \u2192<\/a>\r\n\t\t\t\t\t\t\t<\/div> \r\n\t\t<\/div>\r\n\t<\/div>\r\n\t\t\r\n\t\r\n\t
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\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"\u0110\u00e1m\r\n\t\t\t\t\t\t\t\t\t\r\n\t\t\t<\/div>\r\n\t\t\t\r\n\t\t\t\r\n\t\t\t
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\r\n\t\t\t\t\t\u0110\u00e1m m\u00e2y Cloudways Cloudflare Enterprise<\/strong>\r\n\t\t\t\t\t\t\t\t\t<\/div>\r\n\t\t\t<\/div>\r\n\t\t<\/div>\r\n\t\t\t\tG\u00f3i gi\u00e1 d\u1ecbch v\u1ee5 CDN\/WAF c\u1ea5p doanh nghi\u1ec7p c\u1ee7a Cloudflare c\u00f3 c\u00e1c m\u1ee9c ph\u00ed nh\u01b0 sau: t\u1ed1i \u0111a 5 t\u00ean mi\u1ec1n, m\u1ed7i t\u00ean mi\u1ec1n c\u00f3 gi\u00e1 4,99 USD\/th\u00e1ng, bao g\u1ed3m 100GB b\u0103ng th\u00f4ng, v\u00e0 ph\u1ea7n v\u01b0\u1ee3t qu\u00e1 s\u1ebd \u0111\u01b0\u1ee3c t\u00ednh ph\u00ed theo m\u1ee9c ph\u00ed 0,02 USD\/GB.<\/span>\r\n\t\t\t\t
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M\u1ed7i t\u00ean mi\u1ec1n \u0111\u01b0\u1ee3c t\u1eb7ng 100GB l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp<\/div>\r\n\t\t\t\t\t\t\t\t\t\t\t\tTruy c\u1eadp Cloudways Cloudflare Enterprise \u2192<\/a>\r\n\t\t\t\t\t\t\t<\/div> \r\n\t\t<\/div>\r\n\t<\/div>\r\n\t\t\r\n<\/div>\r\n\r\n\r\n\n\n\n\n\n\n\n

Khi ng\u01b0\u1eddi d\u00f9ng y\u00eau c\u1ea7u m\u1ed9t t\u00e0i nguy\u00ean, to\u00e0n b\u1ed9 h\u1ec7 th\u1ed1ng b\u1eaft \u0111\u1ea7u ho\u1ea1t \u0111\u1ed9ng m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3. N\u1ebfu n\u1ed9i dung m\u00e0 ng\u01b0\u1eddi d\u00f9ng c\u1ea7n \u0111ang \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef s\u1eb5n tr\u00ean n\u00fat c\u1ea1nh (edge node) g\u1ea7n nh\u1ea5t c\u1ee7a h\u1ecd, y\u00eau c\u1ea7u \u0111\u00f3 s\u1ebd \u0111\u01b0\u1ee3c x\u1eed l\u00fd ngay l\u1eadp t\u1ee9c, v\u00e0 tr\u01b0\u1eddng h\u1ee3p n\u00e0y \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u201ctr\u00fang cache\u201d (cache hit). N\u1ebfu n\u1ed9i dung kh\u00f4ng c\u00f3 s\u1eb5n tr\u00ean n\u00fat c\u1ea1nh, h\u1ec7 th\u1ed1ng s\u1ebd g\u1eedi y\u00eau c\u1ea7u \u0111\u1ebfn n\u00fat trung t\u00e2m (central node) \u1edf c\u1ea5p \u0111\u1ed9 cao h\u01a1n; n\u1ebfu n\u00fat trung t\u00e2m c\u0169ng kh\u00f4ng t\u00ecm th\u1ea5y n\u1ed9i dung c\u1ea7n thi\u1ebft, h\u1ec7 th\u1ed1ng s\u1ebd truy xu\u1ea5t n\u00f3 t\u1eeb m\u00e1y ch\u1ee7 ngu\u1ed3n (origin server) \u0111\u1ec3 l\u1ea5y n\u1ed9i dung m\u1edbi nh\u1ea5t, sau \u0111\u00f3 l\u01b0u tr\u1eef n\u1ed9i dung \u0111\u00f3 l\u1ea1i tr\u00ean c\u00e1c n\u00fat c\u1ea1nh \u0111\u1ec3 ph\u1ee5c v\u1ee5 c\u00e1c y\u00eau c\u1ea7u t\u01b0\u01a1ng t\u1ef1 trong t\u01b0\u01a1ng lai.<\/p>\n\n\n\n

C\u01a1 ch\u1ebf \u0111\u1ec7m (cache) v\u00e0 vi\u1ec7c l\u00e0m m\u1edbi n\u1ed9i dung (content refresh)<\/h3>\n\n\n\n

Chi\u1ebfn l\u01b0\u1ee3c l\u01b0u tr\u1eef \u0111\u1ec7m (cache strategy) l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t trong hi\u1ec7u su\u1ea5t m\u1ea1ng. C\u00e1c m\u00e1y ch\u1ee7 n\u00fat (node servers) s\u1ebd quy\u1ebft \u0111\u1ecbnh n\u1ed9i dung n\u00e0o \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef \u0111\u1ec7m v\u00e0 th\u1eddi gian l\u01b0u tr\u1eef \u0111\u1ec7m d\u1ef1a tr\u00ean c\u00e1c quy t\u1eafc \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp s\u1eb5n. Vi\u1ec7c ki\u1ec3m so\u00e1t l\u01b0u tr\u1eef \u0111\u1ec7m th\u01b0\u1eddng \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n th\u00f4ng qua c\u00e1c ti\u00eau Cache-Control<\/code> \u548c Expires<\/code>C\u00e1c t\u00e0i nguy\u00ean t\u0129nh nh\u01b0 h\u00ecnh \u1ea3nh, CSS, v\u00e0 t\u1ec7p JavaScript th\u01b0\u1eddng \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp \u0111\u1ec3 \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef trong b\u1ed9 nh\u1edb \u0111\u1ec7m (cache) trong th\u1eddi gian d\u00e0i, trong khi n\u1ed9i dung \u0111\u1ed9ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp \u0111\u1ec3 kh\u00f4ng \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef trong b\u1ed9 nh\u1edb \u0111\u1ec7m ho\u1eb7c ch\u1ec9 \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef trong th\u1eddi gian ng\u1eafn.<\/p>\n\n\n\n

Khi n\u1ed9i dung tr\u00ean m\u00e1y ch\u1ee7 ngu\u1ed3n \u0111\u01b0\u1ee3c c\u1eadp nh\u1eadt, c\u1ea7n c\u00f3 m\u1ed9t c\u01a1 ch\u1ebf \u0111\u1ec3 x\u00f3a b\u1ecf c\u00e1c b\u1ea3n cache c\u0169 tr\u00ean c\u00e1c node c\u1ea1nh (edge nodes), v\u00e0 \u0111\u00f3 ch\u00ednh l\u00e0 ch\u1ee9c n\u0103ng \u201cL\u00e0m m\u1edbi cache\u201d (Cache Refresh). Thao t\u00e1c l\u00e0m m\u1edbi c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n \u0111\u1ed1i v\u1edbi URL c\u1ee7a m\u1ed9t t\u1ec7p tin c\u1ee5 th\u1ec3, ho\u1eb7c \u0111\u1ed1i v\u1edbi to\u00e0n b\u1ed9 th\u01b0 m\u1ee5c ho\u1eb7c th\u1eadm ch\u00ed t\u00ean mi\u1ec1n, nh\u1eb1m bu\u1ed9c c\u00e1c node c\u1ea1nh ph\u1ea3i truy xu\u1ea5t n\u1ed9i dung t\u1eeb m\u00e1y ch\u1ee7 ngu\u1ed3n \u0111\u1ec3 l\u1ea5y phi\u00ean b\u1ea3n m\u1edbi nh\u1ea5t. Ng\u01b0\u1ee3c l\u1ea1i, ch\u1ee9c n\u0103ng \u201cL\u00e0m n\u00f3ng cache\u201d (Cache Preheat) l\u00e0 vi\u1ec7c t\u1ef1 \u0111\u1ed9ng \u0111\u1ea9y n\u1ed9i dung l\u00ean c\u00e1c node c\u1ea1nh tr\u01b0\u1edbc khi n\u00f3 \u0111\u01b0\u1ee3c c\u00f4ng b\u1ed1, nh\u1eb1m \u0111\u1ea3m b\u1ea3o ng\u01b0\u1eddi d\u00f9ng c\u00f3 tr\u1ea3i nghi\u1ec7m truy c\u1eadp nhanh ch\u00f3ng ngay t\u1eeb l\u1ea7n \u0111\u1ea7u ti\u00ean.<\/p>\n\n\n\n

C\u00e2n b\u1eb1ng t\u1ea3i v\u00e0 \u0111i\u1ec1u ph\u1ed1i th\u00f4ng minh<\/h3>\n\n\n\n

\u0110\u1ec3 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 s\u1eb5n s\u00e0ng cao v\u00e0 hi\u1ec7u su\u1ea5t t\u1ed1t, m\u1ea1ng \u0111\u01b0\u1ee3c trang b\u1ecb h\u1ec7 th\u1ed1ng l\u1eadp l\u1ecbch th\u00f4ng minh. Khi ng\u01b0\u1eddi d\u00f9ng \u0111\u01b0a ra y\u00eau c\u1ea7u, h\u1ec7 th\u1ed1ng l\u1eadp l\u1ecbch s\u1ebd x\u00e1c \u0111\u1ecbnh n\u00fat c\u1ea1nh (edge node) t\u1ed1i \u01b0u nh\u1ea5t \u0111\u1ec3 \u0111\u1ecbnh tuy\u1ebfn y\u00eau c\u1ea7u \u0111\u00f3 d\u1ef1a tr\u00ean nhi\u1ec1u y\u1ebfu t\u1ed1 kh\u00e1c nhau. C\u00e1c y\u1ebfu t\u1ed1 n\u00e0y bao g\u1ed3m nh\u01b0ng kh\u00f4ng gi\u1edbi h\u1ea1n \u1edf: v\u1ecb tr\u00ed \u0111\u1ecba l\u00fd c\u1ee7a ng\u01b0\u1eddi d\u00f9ng, nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 m\u1ea1ng, t\u1ea3i tr\u1ecdng hi\u1ec7n t\u1ea1i c\u1ee7a t\u1eebng n\u00fat, t\u00ecnh tr\u1ea1ng ho\u1ea1t \u0111\u1ed9ng c\u1ee7a n\u00fat \u0111\u00f3, v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng m\u1ea1ng theo th\u1eddi gian th\u1ef1c. Kh\u1ea3 n\u0103ng l\u1eadp l\u1ecbch \u0111\u1ed9ng n\u00e0y gi\u00fap ph\u00e2n ph\u1ed1i l\u01b0u l\u01b0\u1ee3ng m\u1ed9t c\u00e1ch \u0111\u1ec1u \u0111\u1eb7n v\u00e0 hi\u1ec7u qu\u1ea3, tr\u00e1nh t\u00ecnh tr\u1ea1ng qu\u00e1 t\u1ea3i \u1edf m\u1ed9t n\u00fat duy nh\u1ea5t, \u0111\u1ed3ng th\u1eddi c\u00f3 th\u1ec3 t\u1ef1 \u0111\u1ed9ng chuy\u1ec3n h\u01b0\u1edbng y\u00eau c\u1ea7u sang n\u00fat kh\u00e1c khi n\u00fat \u0111\u00f3 g\u1eb7p s\u1ef1 c\u1ed1, \u0111\u1ea3m b\u1ea3o d\u1ecbch v\u1ee5 kh\u00f4ng b\u1ecb gi\u00e1n \u0111o\u1ea1n.<\/p>\n

\u0110\u1ecdc th\u00eam B\u00ed m\u1eadt c\u00f4ng ngh\u1ec7 gia t\u1ed1c bi\u00ean: L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 s\u1eed d\u1ee5ng CDN v\u00e0 \u0111i\u1ec7n to\u00e1n bi\u00ean \u0111\u1ec3 n\u00e2ng cao t\u1ed1c \u0111\u1ed9 truy c\u1eadp to\u00e0n c\u1ea7u<\/a>\u3002<\/p>\n\n\n\n\n

Nh\u1eefng r\u00e0o c\u1ea3n v\u1ec1 hi\u1ec7u n\u0103ng ch\u00ednh m\u00e0 CDN c\u00f3 th\u1ec3 gi\u1ea3i quy\u1ebft l\u00e0:<\/h2>\n\n\n\n

Vi\u1ec7c tri\u1ec3n khai c\u00e1c d\u1ecbch v\u1ee5 ph\u00e2n ph\u1ed1i n\u1ed9i dung (Content Distribution Services \u2013 CDS) ch\u1ee7 y\u1ebfu nh\u1eb1m kh\u1eafc ph\u1ee5c m\u1ed9t s\u1ed1 r\u00e0o c\u1ea3n v\u1ec1 hi\u1ec7u n\u0103ng nghi\u00eam tr\u1ecdng trong c\u00e1c ki\u1ebfn tr\u00fac Web truy\u1ec1n th\u1ed1ng; nh\u1eefng v\u1ea5n \u0111\u1ec1 n\u00e0y \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng v\u00e0 c\u00e1c ch\u1ec9 s\u1ed1 kinh doanh.<\/p>\n\n\n\n

Gi\u1ea3m \u0111\u1ed9 tr\u1ec5 m\u1ea1ng v\u00e0 t\u0103ng t\u1ed1c \u0111\u1ed9 t\u1ea3i trang<\/h3>\n\n\n\n

Kho\u1ea3ng c\u00e1ch v\u1eadt l\u00fd l\u00e0 y\u1ebfu t\u1ed1 ch\u00ednh g\u00e2y ra \u0111\u1ed9 tr\u1ec5 tr\u00ean m\u1ea1ng. T\u1ed1c \u0111\u1ed9 truy\u1ec1n d\u1eef li\u1ec7u trong c\u00e1p quang b\u1ecb h\u1ea1n ch\u1ebf b\u1edfi t\u1ed1c \u0111\u1ed9 \u00e1nh s\u00e1ng; do \u0111\u00f3, th\u1eddi gian truy c\u1eadp gi\u1eefa c\u00e1c l\u1ee5c \u0111\u1ecba c\u00f3 th\u1ec3 l\u00ean t\u1edbi v\u00e0i tr\u0103m mili gi\u00e2y. B\u1eb1ng c\u00e1ch tri\u1ec3n khai h\u00e0ng tr\u0103m n\u00fat edge tr\u00ean to\u00e0n th\u1ebf gi\u1edbi, CDN gi\u00fap \u0111\u01b0a n\u1ed9i dung g\u1ea7n h\u01a1n v\u1edbi ng\u01b0\u1eddi d\u00f9ng, gi\u1ea3m b\u1edbt qu\u00e3ng \u0111\u01b0\u1eddng m\u00e0 d\u1eef li\u1ec7u ph\u1ea3i di chuy\u1ec3n. \u0110i\u1ec1u n\u00e0y th\u01b0\u1eddng gi\u00fap r\u00fat ng\u1eafn th\u1eddi gian c\u1ea7n thi\u1ebft \u0111\u1ec3 t\u1ea3i \u0111\u01b0\u1ee3c byte \u0111\u1ea7u ti\u00ean c\u1ee7a trang web (th\u1eddi gian t\u1ea3i trang) xu\u1ed1ng h\u01a1n 501% \u0111\u1ebfn 400%, t\u1eeb \u0111\u00f3 c\u1ea3i thi\u1ec7n \u0111\u00e1ng k\u1ec3 t\u1ed1c \u0111\u1ed9 t\u1ea3i trang. \u0110i\u1ec1u n\u00e0y \u0111\u1eb7c bi\u1ec7t r\u00f5 r\u1ec7t \u0111\u1ed1i v\u1edbi c\u00e1c trang web ch\u1ee9a nhi\u1ec1u h\u00ecnh \u1ea3nh v\u00e0 video (n\u1ed9i dung \u0111a ph\u01b0\u01a1ng ti\u1ec7n).<\/p>\n\n\n\n

Gi\u1ea3m b\u1edbt \u00e1p l\u1ef1c v\u1ec1 b\u0103ng th\u00f4ng v\u00e0 t\u1ed1i \u01b0u h\u00f3a chi ph\u00ed cho m\u00e1y ch\u1ee7 ngu\u1ed3n<\/h3>\n\n\n\n

Trong tr\u01b0\u1eddng h\u1ee3p kh\u00f4ng s\u1eed d\u1ee5ng CDN (Content Delivery Network), t\u1ea5t c\u1ea3 y\u00eau c\u1ea7u t\u1eeb ng\u01b0\u1eddi d\u00f9ng s\u1ebd \u0111\u01b0\u1ee3c chuy\u1ec3n th\u1eb3ng \u0111\u1ebfn m\u00e1y ch\u1ee7 ngu\u1ed3n. \u0110i\u1ec1u n\u00e0y g\u00e2y ra \u00e1p l\u1ef1c l\u1edbn l\u00ean b\u0103ng th\u00f4ng \u0111\u1ea7u ra c\u1ee7a m\u00e1y ch\u1ee7, d\u1ec5 d\u00e0ng d\u1eabn \u0111\u1ebfn t\u00ecnh tr\u1ea1ng qu\u00e1 t\u1ea3i, t\u1ed1c \u0111\u1ed9 ph\u1ea3n h\u1ed3i ch\u1eadm ho\u1eb7c th\u1eadm ch\u00ed m\u00e1y ch\u1ee7 b\u1ecb ng\u1eebng ho\u1ea1t \u0111\u1ed9ng v\u00e0o nh\u1eefng th\u1eddi \u0111i\u1ec3m l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp cao nh\u1ea5t. \u0110\u1ed3ng th\u1eddi, chi ph\u00ed thu\u00ea b\u0103ng th\u00f4ng c\u0169ng l\u00e0 m\u1ed9t g\u00e1nh n\u1eb7ng t\u00e0i ch\u00ednh kh\u00f4ng nh\u1ecf.<\/p>\n\n\n\n

Nh\u1edd v\u00e0o CDN, kho\u1ea3ng 90% y\u00eau c\u1ea7u t\u1eeb ng\u01b0\u1eddi d\u00f9ng \u0111\u01b0\u1ee3c x\u1eed l\u00fd ngay t\u1ea1i c\u00e1c n\u00fat c\u1ea1nh (edge nodes); ch\u1ec9 nh\u1eefng y\u00eau c\u1ea7u kh\u00f4ng t\u00ecm th\u1ea5y trong b\u1ed9 \u0111\u1ec7m ho\u1eb7c nh\u1eefng y\u00eau c\u1ea7u \u0111\u1ed9ng (dynamic requests) m\u1edbi c\u1ea7n \u0111\u01b0\u1ee3c truy\u1ec1n v\u1ec1 m\u00e1y ch\u1ee7 ngu\u1ed3n (origin server). \u0110i\u1ec1u n\u00e0y gi\u00fap gi\u1ea3m \u0111\u00e1ng k\u1ec3 \u00e1p l\u1ef1c v\u1ec1 b\u0103ng th\u00f4ng v\u00e0 t\u1ea3i t\u00ednh to\u00e1n \u0111\u1ed1i v\u1edbi m\u00e1y ch\u1ee7 ngu\u1ed3n, cho ph\u00e9p c\u00e1c doanh nghi\u1ec7p s\u1eed d\u1ee5ng c\u00e1c m\u00e1y ch\u1ee7 ngu\u1ed3n c\u00f3 c\u1ea5u h\u00ecnh th\u1ea5p h\u01a1n \u0111\u1ec3 h\u1ed7 tr\u1ee3 l\u01b0\u1ee3ng truy c\u1eadp ng\u01b0\u1eddi d\u00f9ng l\u1edbn, t\u1eeb \u0111\u00f3 ti\u1ebft ki\u1ec7m chi ph\u00ed c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng.<\/p>\n\n\n\n

N\u00e2ng cao kh\u1ea3 n\u0103ng ch\u1ed1ng l\u1ea1i c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng d\u1eef li\u1ec7u (traffic attacks).<\/h3>\n\n\n\n

C\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng t\u1eeb ch\u1ed1i d\u1ecbch v\u1ee5 ph\u00e2n t\u00e1n (DDoS) v\u00e0 c\u00e1c lo\u1ea1i t\u1ea5n c\u00f4ng truy c\u1eadp \u0111\u1ed9c h\u1ea1i kh\u00e1c nh\u1eb1m m\u1ee5c \u0111\u00edch l\u00e0m c\u1ea1n ki\u1ec7t t\u00e0i nguy\u00ean c\u1ee7a m\u00e1y ch\u1ee7 m\u1ee5c ti\u00eau b\u1eb1ng c\u00e1ch g\u1eedi m\u1ed9t l\u01b0\u1ee3ng l\u1edbn y\u00eau c\u1ea7u. C\u1ea5u tr\u00fac ph\u00e2n t\u00e1n c\u1ee7a m\u1ea1ng ph\u00e2n ph\u1ed1i n\u1ed9i dung (CDN) t\u1ef1 nhi\u00ean \u0111\u00e3 mang l\u1ea1i kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 nh\u1ea5t \u0111\u1ecbnh. Do l\u01b0u l\u01b0\u1ee3ng \u0111\u01b0\u1ee3c ph\u00e2n t\u00e1n \u0111\u1ebfn c\u00e1c n\u00fat bi\u00ean, l\u01b0u l\u01b0\u1ee3ng t\u1ea5n c\u00f4ng s\u1ebd b\u1ecb pha lo\u00e3ng v\u00e0 ch\u1eb7n l\u1ea1i tr\u01b0\u1edbc khi \u0111\u1ebfn \u0111\u01b0\u1ee3c m\u00e1y ch\u1ee7 ngu\u1ed3n.<\/p>\n\n\n\n

Ngo\u00e0i ra, h\u1ea7u h\u1ebft c\u00e1c nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 CDN chuy\u00ean nghi\u1ec7p \u0111\u1ec1u t\u00edch h\u1ee3p s\u1eb5n c\u00e1c c\u00f4ng c\u1ee5 nh\u01b0 t\u01b0\u1eddng l\u1eeda d\u00e0nh cho \u1ee9ng d\u1ee5ng web (Web Application Firewall \u2013 WAF) v\u00e0 c\u00e1c d\u1ecbch v\u1ee5 b\u1ea3o v\u1ec7 ch\u1ed1ng DDoS (Anti-DDoS). Nh\u1eefng c\u00f4ng c\u1ee5 n\u00e0y c\u00f3 th\u1ec3 ph\u00e1t hi\u1ec7n v\u00e0 ch\u1eb7n c\u00e1c m\u1ed1i \u0111e d\u1ecda ph\u1ed5 bi\u1ebfn nh\u01b0 qu\u00e9t \u0111\u1ed9c h\u1ea1i, t\u1ea5n c\u00f4ng SQL injection, ho\u1eb7c c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng ki\u1ec3u CC (Content Distribution Attacks) ngay t\u1ea1i \u0111i\u1ec3m cu\u1ed1i c\u1ee7a m\u1ea1ng, t\u1eeb \u0111\u00f3 t\u1ea1o ra m\u1ed9t r\u00e0o c\u1ea3n b\u1ea3o m\u1eadt v\u1eefng ch\u1eafc cho trang web ngu\u1ed3n, \u0111\u1ea3m b\u1ea3o ho\u1ea1t \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh c\u1ee7a doanh nghi\u1ec7<\/p>\n

\u0110\u1ecdc th\u00eam Nguy\u00ean l\u00fd c\u00f4ng ngh\u1ec7 CDN v\u00e0 th\u1ef1c ti\u1ec5n tri\u1ec3n khai to\u00e0n c\u1ea7u: N\u00e2ng cao t\u1ed1c \u0111\u1ed9 v\u00e0 t\u00ednh kh\u1ea3 d\u1ee5ng c\u1ee7a website<\/a>\u3002<\/p>\n\n\n\n\n

L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 ch\u1ecdn d\u1ecbch v\u1ee5 CDN ph\u00f9 h\u1ee3p cho doanh nghi\u1ec7p c\u1ee7a b\u1ea1n?<\/h2>\n\n\n\n

Tr\u01b0\u1edbc s\u1ef1 xu\u1ea5t hi\u1ec7n c\u1ee7a r\u1ea5t nhi\u1ec1u nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 tr\u00ean th\u1ecb tr\u01b0\u1eddng, vi\u1ec7c \u0111\u01b0a ra l\u1ef1a ch\u1ecdn ph\u00f9 h\u1ee3p \u0111\u00f2i h\u1ecfi ph\u1ea3i xem x\u00e9t \u0111\u1ebfn nhi\u1ec1u y\u1ebfu t\u1ed1 kh\u00e1c nhau, ch\u1ee9 kh\u00f4ng ch\u1ec9 l\u00e0 gi\u00e1 c\u1ea3.<\/p>\n\n\n\n

X\u00e1c \u0111\u1ecbnh r\u00f5 c\u00e1c y\u00eau c\u1ea7u v\u1ec1 hi\u1ec7u n\u0103ng v\u00e0 ph\u1ea1m vi ph\u1ee7 s\u00f3ng (coverage).<\/h3>\n\n\n\n

Tr\u01b0\u1edbc h\u1ebft, b\u1ea1n c\u1ea7n \u0111\u00e1nh gi\u00e1 xem nh\u00f3m ng\u01b0\u1eddi d\u00f9ng c\u1ee7a m\u00ecnh ch\u1ee7 y\u1ebfu t\u1eadp trung \u1edf \u0111\u00e2u. N\u1ebfu doanh nghi\u1ec7p c\u1ee7a b\u1ea1n ho\u1ea1t \u0111\u1ed9ng ch\u1ee7 y\u1ebfu trong n\u01b0\u1edbc, b\u1ea1n n\u00ean quan t\u00e2m \u0111\u1ebfn s\u1ed1 l\u01b0\u1ee3ng node (tr\u1ea1m truy\u1ec1n d\u1eef li\u1ec7u) c\u1ee7a nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 t\u1ea1i Trung Qu\u1ed1c \u0110\u1ea1i l\u1ee5c v\u00e0 xem li\u1ec7u h\u1ecd c\u00f3 ph\u1ee7 s\u00f3ng \u0111\u1ea7y \u0111\u1ee7 c\u00e1c nh\u00e0 m\u1ea1ng vi\u1ec5n th\u00f4ng hay kh\u00f4ng. \u0110\u1ed1i v\u1edbi c\u00e1c d\u1ecbch v\u1ee5 qu\u1ed1c t\u1ebf, b\u1ea1n c\u1ea7n xem x\u00e9t m\u1eadt \u0111\u1ed9 ph\u00e2n b\u1ed1 node tr\u00ean to\u00e0n c\u1ea7u, \u0111\u1eb7c bi\u1ec7t l\u00e0 ch\u1ea5t l\u01b0\u1ee3ng ph\u1ee7 s\u00f3ng t\u1ea1i c\u00e1c khu v\u1ef1c quan tr\u1ecdng nh\u01b0 Ch\u00e2u \u00c2u, M\u1ef9 v\u00e0 \u0110\u00f4ng Nam \u00c1. B\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00e1c c\u00f4ng c\u1ee5 gi\u00e1m s\u00e1t hi\u1ec7u n\u0103ng c\u1ee7a b\u00ean th\u1ee9 ba ho\u1eb7c c\u00e1c d\u1ecbch v\u1ee5 th\u1eed nghi\u1ec7m do nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 cung c\u1ea5p \u0111\u1ec3 ki\u1ec3m tra th\u1eddi gian truy c\u1eadp v\u00e0 \u0111\u1ed9 s\u1eb5n s\u00e0ng ph\u1ee5c v\u1ee5 t\u1ea1i c\u00e1c khu v\u1ef1c \u0111\u00f3.<\/p>\n\n\n\n

M\u1ed9t kh\u00eda c\u1ea1nh kh\u00e1c c\u1ee7a hi\u1ec7u n\u0103ng l\u00e0 kh\u1ea3 n\u0103ng h\u1ed7 tr\u1ee3 c\u00e1c t\u00ednh n\u0103ng c\u1ea7n thi\u1ebft. B\u1ea1n c\u1ea7n x\u00e1c nh\u1eadn xem CDN c\u00f3 h\u1ed7 tr\u1ee3 c\u00e1c t\u00ednh n\u0103ng k\u1ef9 thu\u1eadt m\u00e0 b\u1ea1n y\u00eau c\u1ea7u hay kh\u00f4ng, ch\u1eb3ng h\u1ea1n nh\u01b0 c\u00e1c giao th\u1ee9c HTTPS\/HTTP\/2\/QUIC, t\u0103ng t\u1ed1c ph\u00e1t tr\u1ef1c ti\u1ebfp v\u00e0 ph\u00e1t tr\u1ef1c tuy\u1ebfn theo y\u00eau c\u1ea7u (VOD v\u00e0 live streaming), t\u0103ng t\u1ed1c n\u1ed9i dung \u0111\u1ed9ng, c\u0169ng nh\u01b0 m\u1ee9c \u0111\u1ed9 \u0111a d\u1ea1ng c\u1ee7a c\u00e1c giao di\u1ec7n API.<\/p>\n\n\n\n

\u0110\u00e1nh gi\u00e1 kh\u1ea3 n\u0103ng an to\u00e0n v\u00e0 tu\u00e2n th\u1ee7<\/h3>\n\n\n\n

An ninh l\u00e0 m\u1ed9t y\u1ebfu t\u1ed1 quan tr\u1ecdng c\u1ea7n \u0111\u01b0\u1ee3c xem x\u00e9t k\u1ef9 l\u01b0\u1ee1ng. H\u00e3y t\u00ecm hi\u1ec3u c\u00e1c t\u00ednh n\u0103ng b\u1ea3o m\u1eadt m\u00e0 nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 \u0111\u01b0a ra, ch\u1eb3ng h\u1ea1n nh\u01b0 kh\u1ea3 n\u0103ng ch\u1ed1ng DDoS, li\u1ec7u c\u01a1 s\u1edf d\u1eef li\u1ec7u quy t\u1eafc c\u1ee7a WAF (Web Application Firewall) c\u00f3 \u0111\u01b0\u1ee3c c\u1eadp nh\u1eadt th\u01b0\u1eddng xuy\u00ean hay kh\u00f4ng, v\u00e0 li\u1ec7u h\u1ecd c\u00f3 h\u1ed7 tr\u1ee3 vi\u1ec7c t\u00f9y ch\u1ec9nh c\u00e1c quy t\u1eafc b\u1ea3o v\u1ec7 hay kh\u00f4ng. \u0110\u1ed1i v\u1edbi c\u00e1c ng\u00e0nh \u0111\u1eb7c bi\u1ec7t y\u00eau c\u1ea7u x\u1eed l\u00fd d\u1eef li\u1ec7u nh\u1ea1y c\u1ea3m, b\u1ea1n c\u0169ng c\u1ea7n ki\u1ec3m tra xem d\u1ecbch v\u1ee5 CDN (Content Delivery Network) c\u00f3 tu\u00e2n th\u1ee7 c\u00e1c quy \u0111\u1ecbnh v\u00e0 ti\u00eau chu\u1ea9n ngh\u1ec1 nghi<\/p>\n\n\n\n

M\u1ed9t kh\u00eda c\u1ea1nh quan tr\u1ecdng kh\u00e1c l\u00e0 s\u1ef1 h\u1ed7 tr\u1ee3 t\u1eeb c\u00e1c ch\u1ee9ng ch\u1ec9 SSL\/TLS. Vi\u1ec7c qu\u1ea3n l\u00fd ch\u1ee9ng ch\u1ec9 m\u1ed9t c\u00e1ch thu\u1eadn ti\u1ec7n, kh\u1ea3 n\u0103ng h\u1ed7 tr\u1ee3 nhi\u1ec1u lo\u1ea1i ch\u1ee9ng ch\u1ec9 kh\u00e1c nhau, v\u00e0 vi\u1ec7c c\u00f3 cung c\u1ea5p ch\u1ee9ng ch\u1ec9 SSL mi\u1ec5n ph\u00ed hay kh\u00f4ng, t\u1ea5t c\u1ea3 \u0111\u1ec1u \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn \u0111\u1ed9 kh\u00f3 trong qu\u00e1 tr\u00ecnh tri\u1ec3n khai v\u00e0 b\u1ea3o tr\u00ec h\u1ec7 th\u1ed1ng.<\/p>\n\n\n\n

Ph\u00e2n t\u00edch c\u1ea5u tr\u00fac chi ph\u00ed v\u00e0 h\u1ed7 tr\u1ee3 k\u1ef9 thu\u1eadt<\/h3>\n\n\n\n

C\u00e1c m\u00f4 h\u00ecnh t\u00ednh ph\u00ed c\u1ee7a CDN th\u01b0\u1eddng \u0111\u01b0\u1ee3c chia th\u00e0nh hai lo\u1ea1i ch\u00ednh: t\u00ednh ph\u00ed theo b\u0103ng th\u00f4ng v\u00e0 t\u00ednh ph\u00ed theo l\u01b0\u1ee3ng d\u1eef li\u1ec7u truy\u1ec1n t\u1ea3i. B\u1ea1n c\u1ea7n d\u1ef1 \u0111o\u00e1n xem ph\u01b0\u01a1ng th\u1ee9c n\u00e0o ph\u00f9 h\u1ee3p v\u00e0 ti\u1ebft ki\u1ec7m chi ph\u00ed nh\u1ea5t d\u1ef1a tr\u00ean m\u00f4 h\u00ecnh s\u1eed d\u1ee5ng d\u1eef li\u1ec7u c\u1ee7a m\u00ecnh. Ngo\u00e0i ra, h\u00e3y ch\u00fa \u00fd xem li\u1ec7u c\u00f3 c\u00e1c g\u00f3i d\u1ecbch v\u1ee5 t\u00ednh ph\u00ed linh ho\u1ea1t d\u00e0nh cho l\u01b0\u1ee3ng truy c\u1eadp \u0111\u1ed9t ng\u1ed9t hay c\u00e1c g\u00f3i d\u1ecbch v\u1ee5 v\u1edbi m\u1ee9c gi\u00e1 c\u1ed1 \u0111\u1ecbnh t\u1ed1i thi\u1ec3u kh\u00f4ng. C\u00e1c chi ph\u00ed \u1ea9n kh\u00e1c bao g\u1ed3m ph\u00ed y\u00eau c\u1ea7u HTTPS, ph\u00ed truy\u1ec1n d\u1eef li\u1ec7u ng\u01b0\u1ee3c t\u1eeb m\u00e1y ch\u1ee7 g\u1ed1c (backhaul), ph<\/p>\n\n\n\n

M\u1ed9t d\u1ecbch v\u1ee5 h\u1ed7 tr\u1ee3 k\u1ef9 thu\u1eadt \u0111\u00e1ng tin c\u1eady c\u0169ng r\u1ea5t quan tr\u1ecdng. H\u00e3y t\u00ecm hi\u1ec3u v\u1ec1 c\u00e1c k\u00eanh h\u1ed7 tr\u1ee3 k\u1ef9 thu\u1eadt c\u1ee7a nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5, th\u1eddi gian ph\u1ea3n h\u1ed3i, c\u0169ng nh\u01b0 c\u00e1c th\u1ecfa thu\u1eadn v\u1ec1 ch\u1ea5t l\u01b0\u1ee3ng d\u1ecbch v\u1ee5. M\u1ed9t \u0111\u1ed9i ng\u0169 h\u1ed7 tr\u1ee3 k\u1ef9 thu\u1eadt chuy\u00ean nghi\u1ec7p, s\u1eb5n s\u00e0ng ph\u1ea3n h\u1ed3i nhanh ch\u00f3ng 24\/7 s\u1ebd l\u00e0 ngu\u1ed3n h\u1ed7 tr\u1ee3 v\u00f4 gi\u00e1 khi<\/p>\n\n\n\n

Th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t \u0111\u1ec3 tri\u1ec3n khai v\u00e0 t\u1ed1i \u01b0u h\u00f3a CDN<\/h2>\n\n\n\n

Vi\u1ec7c t\u00edch h\u1ee3p th\u00e0nh c\u00f4ng CDN ch\u1ec9 l\u00e0 b\u01b0\u1edbc \u0111\u1ea7u ti\u00ean, c\u1ea5u h\u00ecnh t\u1ed1i \u01b0u li\u00ean t\u1ee5c m\u1edbi c\u00f3 th\u1ec3 gi\u1ea3i ph\u00f3ng ti\u1ec1m n\u0103ng t\u1ed1i \u0111a c\u1ee7a n\u00f3.<\/p>\n\n\n\n

C\u1ea5u h\u00ecnh chi ti\u1ebft chi\u1ebfn l\u01b0\u1ee3c l\u01b0u tr\u1eef \u0111\u1ec7m (cache)<\/h3>\n\n\n\n

Nh\u1eefng quy t\u1eafc l\u01b0u tr\u1eef \u0111\u1ec7m (cache) \u00e1p d\u1ee5ng m\u1ed9t c\u00e1ch chung chung th\u01b0\u1eddng kh\u00f4ng ph\u1ea3i l\u00e0 gi\u1ea3i ph\u00e1p t\u1ed1i \u01b0u. C\u1ea7n ph\u1ea3i th\u1ef1c hi\u1ec7n vi\u1ec7c c\u1ea5u h\u00ecnh chi ti\u1ebft d\u1ef1a tr\u00ean lo\u1ea1i t\u1ec7p tin v\u00e0 t\u1ea7n su\u1ea5t thay \u0111\u1ed5i c\u1ee7a ch\u00fang. \u0110\u1ed1i v\u1edbi c\u00e1c t\u00e0i nguy\u00ean t\u0129nh \u0111\u00e3 \u0111\u01b0\u1ee3c phi\u00ean b\u1ea3n h\u00f3a (versioned static resources), c\u00f3 th\u1ec3 thi\u1ebft l\u1eadp th\u1eddi gian l\u01b0u tr\u1eef \u0111\u1ec7m l\u00ean \u0111\u1ebfn m\u1ed9t n\u0103m, \u0111\u1ed3ng th\u1eddi s\u1eed d\u1ee5ng gi\u00e1 tr\u1ecb hash trong t\u00ean t\u1ec7p tin \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o r\u1eb1ng d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef s\u1ebd kh\u00f4ng bao gi\u1edd l\u1ed7i th\u1eddi. \u0110\u1ed1i v\u1edbi c\u00e1c n\u1ed9i dung nh\u01b0 trang HTML c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c c\u1eadp nh\u1eadt th\u01b0\u1eddng xuy\u00ean, c\u00f3 th\u1ec3 thi\u1ebft l\u1eadp th\u1eddi gian l\u01b0u tr\u1eef \u0111\u1ec7m ng\u1eafn h\u01a1n, ho\u1eb7c k\u1ebft h\u1ee3p v\u1edbi c\u00e1c c\u00f4ng ngh\u1ec7 t\u0103ng t\u1ed1c hi\u1ec7u su\u1ea5t cho n\u1ed9i dung \u0111\u1ed9ng \u0111\u01b0\u1ee3c x\u1eed l\u00fd \u1edf \u201cb\u00ean c<\/p>\n\n\n\n

Vi\u1ec7c thi\u1ebft l\u1eadp chi\u1ebfn l\u01b0\u1ee3c truy xu\u1ea5t ngu\u1ed3n (origin-pull strategy) m\u1ed9t c\u00e1ch h\u1ee3p l\u00fd c\u0169ng r\u1ea5t quan tr\u1ecdng. B\u1ea1n c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng c\u00e1c h\u00e0nh vi truy xu\u1ea5t ngu\u1ed3n kh\u00e1c nhau t\u00f9y theo lo\u1ea1i t\u1ec7p tin: v\u00ed d\u1ee5, \u0111\u1ed1i v\u1edbi c\u00e1c t\u1ec7p tin l\u1edbn, b\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng ph\u01b0\u01a1ng th\u1ee9c truy xu\u1ea5t ngu\u1ed3n theo t\u1eebng ph\u1ea7n (chunked origin-pull) \u0111\u1ec3 t\u0103ng hi\u1ec7u su\u1ea5t; ho\u1eb7c thi\u1ebft l\u1eadp cho h<\/p>\n\n\n\n

B\u1eadt t\u00ednh n\u0103ng n\u00e2ng cao hi\u1ec7u su\u1ea5t<\/h3>\n\n\n\n

C\u00e1c n\u1ec1n t\u1ea3ng CDN hi\u1ec7n \u0111\u1ea1i cung c\u1ea5p nhi\u1ec1u c\u00f4ng c\u1ee5 nh\u1eb1m t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t. Ch\u1ee9c n\u0103ng n\u00e9n th\u00f4ng minh c\u00f3 th\u1ec3 t\u1ef1 \u0111\u1ed9ng n\u00e9n c\u00e1c t\u00e0i nguy\u00ean v\u0103n b\u1ea3n b\u1eb1ng ph\u01b0\u01a1ng th\u1ee9c Gzip ho\u1eb7c Brotli, gi\u00fap gi\u1ea3m k\u00edch th\u01b0\u1edbc d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c truy\u1ec1n \u0111i. C\u00e1c c\u00f4ng c\u1ee5 t\u1ed1i \u01b0u h\u00f3a h\u00ecnh \u1ea3nh cho ph\u00e9p chuy\u1ec3n \u0111\u1ed5i \u0111\u1ecbnh d\u1ea1ng h\u00ecnh \u1ea3nh sang WebP, c\u1eaft x\u00e9n, \u0111i\u1ec1u ch\u1ec9nh k\u00edch th\u01b0\u1edbc v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng theo nhu c\u1ea7u, t\u1eeb \u0111\u00f3 ti\u1ebft ki\u1ec7m \u0111\u00e1ng k\u1ec3 l\u01b0\u1ee3ng d\u1eef li\u1ec7u truy\u1ec1n tr\u00ean c\u00e1c thi\u1ebft b\u1ecb di \u0111\u1ed9ng.<\/p>\n\n\n\n

Vi\u1ec7c k\u1ebft h\u1ee3p c\u00e1c y\u00eau c\u1ea7u (request merging) c\u0169ng l\u00e0 m\u1ed9t bi\u1ec7n ph\u00e1p t\u1ed1i \u01b0u h\u00f3a ph\u1ed5 bi\u1ebfn, \u0111\u1eb7c bi\u1ec7t trong b\u1ed1i c\u1ea3nh HTTP\/2 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i. M\u1eb7c d\u00f9 vi\u1ec7c k\u1ebft h\u1ee3p c\u00e1c t\u1ec7p tin (file merging) kh\u00f4ng c\u00f2n \u0111\u01b0\u1ee3c nh\u1ea5n m\u1ea1nh qu\u00e1 m\u1ee9c n\u1eefa, nh\u01b0ng n\u00f3 v\u1eabn mang l\u1ea1i hi\u1ec7u qu\u1ea3 trong m\u1ed9t s\u1ed1 tr\u01b0\u1eddng h\u1ee3p nh\u1ea5t \u0111\u1ecbnh. Ngo\u00e0i ra, h\u00e3y \u0111\u1ea3m b\u1ea3o r\u1eb1ng c\u00e1c giao th\u1ee9c HTTP\/2 ho\u1eb7c QUIC \u0111\u01b0\u1ee3c k\u00edch ho\u1ea1t \u0111\u1ea7y \u0111\u1ee7 \u0111\u1ec3 t\u1eadn d\u1ee5ng c\u00e1c t\u00ednh n\u0103ng nh\u01b0 \u0111a lu\u1ed3ng (multiplexing) v\u00e0 n\u00e9n ti\u00eau \u0111\u1ec1 (header compression), nh\u1eb1m gi\u1ea3m \u0111\u1ed9 tr\u1ec5 trong<\/p>\n\n\n\n

Gi\u00e1m s\u00e1t li\u00ean t\u1ee5c v\u00e0 ph\u00e2n t\u00edch hi\u1ec7u su\u1ea5t<\/h3>\n\n\n\n

Sau khi tri\u1ec3n khai, kh\u00f4ng th\u1ec3 b\u1ecf m\u1eb7c h\u1ec7 th\u1ed1ng m\u00e0 kh\u00f4ng quan t\u00e2m \u0111\u1ebfn n\u00f3; c\u1ea7n thi\u1ebft ph\u1ea3i x\u00e2y d\u1ef1ng m\u1ed9t h\u1ec7 th\u1ed1ng gi\u00e1m s\u00e1t li\u00ean t\u1ee5c. H\u00e3y s\u1eed d\u1ee5ng c\u00e1c b\u1ea3n ghi nh\u1eadt k\u00fd theo th\u1eddi gian th\u1ef1c, bi\u1ec3u \u0111\u1ed3 gi\u00e1m s\u00e1t b\u0103ng th\u00f4ng\/l\u01b0u l\u01b0\u1ee3ng m\u00e0 nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 CDN cung c\u1ea5p, c\u00f9ng v\u1edbi c\u00e1c d\u1ecbch v\u1ee5 gi\u00e1m s\u00e1t hi\u1ec7u n\u0103ng to\u00e0n c\u1ea7u c\u1ee7a b\u00ean th\u1ee9 ba, \u0111\u1ec3 theo d\u00f5i li\u00ean t\u1ee5c c\u00e1c ch\u1ec9 s\u1ed1 hi\u1ec7u n\u0103ng quan tr\u1ecdng nh\u01b0 t\u1ef7 l\u1ec7 truy c\u1eadp th\u00e0nh c\u00f4ng, \u0111\u1ed9 tr\u1ec5 trung b\u00ecnh<\/p>\n\n\n\n

Khi ph\u00e1t hi\u1ec7n s\u1ef1 suy gi\u1ea3m hi\u1ec7u n\u0103ng ho\u1eb7c t\u1ef7 l\u1ec7 truy c\u1eadp b\u1ea5t th\u01b0\u1eddng, kh\u1ea3 n\u0103ng ph\u00e2n t\u00edch nhanh ch\u00f3ng c\u00e1c log \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh nguy\u00ean nh\u00e2n l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t trong vi\u1ec7c \u0111i\u1ec1u ch\u1ec9nh chi\u1ebfn l\u01b0\u1ee3c l\u01b0u tr\u1eef \u0111\u1ec7m (cache), ki\u1ec3m tra l\u1ed7i c\u1ea5u h\u00ecnh ho\u1eb7c li\u00ean h\u1ec7 v\u1edbi nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 h\u1ed7 tr\u1ee3. Vi\u1ec7c ki\u1ec3m tra v\u00e0 t\u1ed1i \u01b0u h\u00f3a \u0111\u1ecbnh k\u1ef3 c\u00e1c quy t\u1eafc l\u01b0u tr\u1eef \u0111\u1ec7m l\u00e0 c\u00f4ng vi\u1ec7c c\u1ea7n thi\u1ebft \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o ho\u1ea1t \u0111\u1ed9ng hi\u1ec7u qu\u1ea3 l<\/p>\n\n\n\n

T\u00f3m l\u1ea1i<\/h2>\n\n\n\n

M\u1ea1ng l\u01b0\u1edbi ph\u00e2n ph\u1ed1i n\u1ed9i dung (Content Distribution Network \u2013 CDN) \u0111\u00e3 tr\u1edf th\u00e0nh m\u1ed9t ph\u1ea7n kh\u00f4ng th\u1ec3 thi\u1ebfu trong ki\u1ebfn tr\u00fac Web hi\u1ec7n \u0111\u1ea1i. B\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng m\u1ed9t m\u1ea1ng l\u01b0\u1edbi c\u00e1c n\u00fat \u0111\u1ea7u cu\u1ed1i (edge nodes) \u0111\u01b0\u1ee3c tri\u1ec3n khai tr\u00ean kh\u1eafp th\u1ebf gi\u1edbi, CDN gi\u00fap ph\u00e2n ph\u1ed1i n\u1ed9i dung m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 v\u00e0 \u0111\u00e1ng tin c\u1eady \u0111\u1ebfn ng\u01b0\u1eddi d\u00f9ng cu\u1ed1i. \u0110i\u1ec1u n\u00e0y gi\u1ea3i quy\u1ebft tri\u1ec7t \u0111\u1ec3 v\u1ea5n \u0111\u1ec1 tr\u00ec ho\u00e3n truy c\u1eadp do kho\u1ea3ng c\u00e1ch v\u1eadt l\u00fd v\u00e0 t\u00ecnh tr\u1ea1ng t\u1eafc ngh\u1ebdn m\u1ea1ng, \u0111\u1ed3ng th\u1eddi n\u00e2ng cao \u0111\u00e1ng k\u1ec3 kh\u1ea3 n\u0103ng ch\u1ecbu t\u1ea3i v\u00e0 t\u00ednh b\u1ea3o m\u1eadt c\u1ee7a c\u00e1c trang web.<\/p>\n\n\n\n

Vi\u1ec7c hi\u1ec3u r\u00f5 c\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a CDN (Content Delivery Network) s\u1ebd gi\u00fap ch\u00fang ta thi\u1ebft k\u1ebf c\u00e1c h\u1ec7 th\u1ed1ng m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 h\u01a1n; nh\u1eadn th\u1ee9c \u0111\u01b0\u1ee3c nh\u1eefng h\u1ea1n ch\u1ebf m\u00e0 CDN gi\u1ea3i quy\u1ebft \u0111\u01b0\u1ee3c s\u1ebd gi\u00fap ch\u00fang ta \u0111\u00e1nh gi\u00e1 r\u00f5 r\u00e0ng h\u01a1n t\u00ednh c\u1ea7n thi\u1ebft c\u1ee7a vi\u1ec7c \u00e1p d\u1ee5ng n\u00f3; trong khi vi\u1ec7c n\u1eafm v\u1eefng c\u00e1c k\u1ef9 thu\u1eadt l\u1ef1a ch\u1ecdn gi\u1ea3i ph\u00e1p v\u00e0 t\u1ed1i \u01b0u h\u00f3a qu\u00e1 tr\u00ecnh tri\u1ec3n khai s\u1ebd gi\u00fap t\u1ed1i \u0111a h\u00f3a gi\u00e1 tr\u1ecb c\u1ee7a c\u00f4ng ngh\u1ec7 n\u00e0y. T\u1eeb vi\u1ec7c t\u0103ng t\u1ed1c truy c\u1eadp c\u00e1c t\u00e0i nguy\u00ean t\u0129nh \u0111\u1ebfn vi\u1ec7c h\u1ed7 tr\u1ee3 c\u00e1c giao di\u1ec7n API \u0111\u1ed9ng, t\u1eeb c\u00e1c trang web truy\u1ec1n th\u1ed1ng \u0111\u1ebfn c\u00e1c \u1ee9ng d\u1ee5ng ph\u00e1t tr\u1ef1c tuy\u1ebfn v\u00e0 th\u1eddi gian th\u1ef1c, n\u1ed9i dung v\u00e0 ph\u1ea1m vi \u1ee9ng d\u1ee5ng c\u1ee7a CDN li\u00ean t\u1ee5c \u0111\u01b0\u1ee3c m\u1edf r\u1ed9ng, \u0111\u00f3ng g\u00f3p quan tr\u1ecdng v\u00e0o vi\u1ec7c c\u1ea3i thi\u1ec7n tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng tr\u00ean Internet.<\/p>\n\n\n\n

FAQ \u5e38\u89c1\u95ee\u9898<\/h2>\n\n\n\n

CDN v\u00e0 d\u1ecbch v\u1ee5 l\u01b0u tr\u1eef \u0111\u00e1m m\u00e2y kh\u00e1c nhau nh\u01b0 th\u1ebf n\u00e0o?<\/h3>\n\n\n\n

CDN (Content Delivery Network) ch\u1ee7 y\u1ebfu t\u1eadp trung v\u00e0o vi\u1ec7c t\u0103ng t\u1ed1c \u0111\u1ed9 ph\u00e2n ph\u1ed1i v\u00e0 l\u01b0u tr\u1eef n\u1ed9i dung, v\u1edbi gi\u00e1 tr\u1ecb c\u1ed1t l\u00f5i l\u00e0 gi\u1ea3m \u0111\u1ed9 tr\u1ec5 v\u00e0 ti\u1ebft ki\u1ec7m b\u0103ng th\u00f4ng c\u1ee7a m\u00e1y ch\u1ee7 ngu\u1ed3n. Th\u00f4ng th\u01b0\u1eddng, CDN c\u1ea7n ph\u1ea3i ho\u1ea1t \u0111\u1ed9ng ph\u1ed1i h\u1ee3p v\u1edbi m\u1ed9t m\u00e1y ch\u1ee7 ngu\u1ed3n (source server) \u0111\u1ec3 ho\u1ea1t \u0111\u1ed9ng hi\u1ec7u qu<\/p>\n\n\n\n

D\u1ecbch v\u1ee5 l\u01b0u tr\u1eef \u0111\u00e1m m\u00e2y ch\u1ee7 y\u1ebfu cung c\u1ea5p ch\u1ee9c n\u0103ng l\u01b0u tr\u1eef d\u1eef li\u1ec7u, v\u1edbi \u0111\u1ed9 b\u1ec1n cao v\u00e0 kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng dung l\u01b0\u1ee3ng. M\u1eb7c d\u00f9 nhi\u1ec1u d\u1ecbch v\u1ee5 l\u01b0u tr\u1eef \u0111\u00e1m m\u00e2y c\u0169ng t\u00edch h\u1ee3p c\u00f4ng ngh\u1ec7 t\u0103ng t\u1ed1c CDN (Content Delivery Network), nh\u01b0ng ch\u1ee9c n\u0103ng ch\u00ednh c\u1ee7a ch\u00fang v\u1eabn l\u00e0 l\u01b0u tr\u1eef d\u1eef li\u1ec7u. Trong th\u1ef1c t\u1ebf, hai c\u00f4ng ngh\u1ec7 n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng k\u1ebft h\u1ee3p v\u1edbi nhau: c\u00e1c t\u1ec7p tin t\u0129nh \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef tr\u00ean d\u1ecbch v\u1ee5 l\u01b0u tr\u1eef \u0111\u00e1m m\u00e2y v\u00e0 sau \u0111\u00f3 \u0111\u01b0\u1ee3c truy c\u1eadp th\u00f4ng qua CDN \u0111\u1ec3 t\u0103ng t\u1ed1c \u0111\u1ed9 truy\u1ec1n d\u1eef li\u1ec7u.<\/p>\n\n\n\n

Sau khi s\u1eed d\u1ee5ng CDN (Content Delivery Network), th\u1ee9 h\u1ea1ng c\u1ee7a trang web tr\u00ean c\u00e1c c\u00f4ng c\u1ee5 t\u00ecm ki\u1ebfm c\u00f3 b\u1ecb \u1ea3nh h\u01b0\u1edfng kh\u00f4ng?<\/h3>\n\n\n\n

Vi\u1ec7c s\u1eed d\u1ee5ng CDN m\u1ed9t c\u00e1ch h\u1ee3p l\u00fd th\u01b0\u1eddng c\u00f3 t\u00e1c \u0111\u1ed9ng t\u00edch c\u1ef1c \u0111\u1ebfn SEO. C\u00e1c c\u00f4ng c\u1ee5 t\u00ecm ki\u1ebfm xem t\u1ed1c \u0111\u1ed9 truy c\u1eadp v\u00e0o trang web l\u00e0 m\u1ed9t trong nh\u1eefng y\u1ebfu t\u1ed1 quan tr\u1ecdng \u0111\u1ec3 x\u1ebfp h\u1ea1ng, v\u00e0 vi\u1ec7c CDN gi\u00fap c\u1ea3i thi\u1ec7n \u0111\u00e1ng k\u1ec3 t\u1ed1c \u0111\u1ed9 t\u1ea3i trang s\u1ebd g\u00f3p ph\u1ea7n n\u00e2ng cao th\u1ee9 h\u1ea1ng tr\u00ean b\u1ea3ng x\u1ebfp h\u1ea1ng t\u00ecm ki\u1ebfm.<\/p>\n\n\n\n

C\u1ea7n l\u01b0u \u00fd r\u1eb1ng b\u1ea1n ph\u1ea3i \u0111\u1ea3m b\u1ea3o r\u1eb1ng c\u1ea5u h\u00ecnh c\u1ee7a CDN l\u00e0 \u0111\u00fang \u0111\u1eafn: v\u00ed d\u1ee5 nh\u01b0 thi\u1ebft l\u1eadp c\u00e1c ti\u00eau \u0111\u1ec1 ki\u1ec3m so\u00e1t b\u1ed9 \u0111\u1ec7m m\u1ed9t c\u00e1ch h\u1ee3p l\u00fd, tr\u1ea3 v\u1ec1 m\u00e3 tr\u1ea1ng th\u00e1i ch\u00ednh x\u00e1c, v\u00e0 \u0111\u1ea3m b\u1ea3o r\u1eb1ng c\u00e1c c\u00f4ng c\u1ee5 thu th\u1eadp d\u1eef li\u1ec7u c\u1ee7a c\u00f4ng c\u1ee5 t\u00ecm ki\u1ebfm (search engine spiders) c\u00f3 th\u1ec3 truy c\u1eadp v\u00e0 thu th\u1eadp n\u1ed9i dung m\u1ed9t c\u00e1ch b\u00ecnh th\u01b0\u1eddng. N\u1ebfu \u0111\u01b0\u1ee3c x\u1eed l\u00fd \u0111\u00fang c\u00e1ch, vi\u1ec7c s\u1eed d\u1ee5ng CDN s\u1ebd gi\u00fap trang web c\u1ee7a b\u1ea1n tr\u1edf n\u00ean th\u00e2n thi\u1ec7n h\u01a1n v<\/p>\n\n\n\n

N\u1ed9i dung c\u1ee7a trang web \u0111\u1ed9ng c\u00f3 th\u00edch h\u1ee3p \u0111\u1ec3 \u0111\u01b0\u1ee3c t\u0103ng t\u1ed1c b\u1eb1ng CDN (Content Delivery Network) kh\u00f4ng?<\/h3>\n\n\n\n

\u0110\u00fang v\u1eady, n\u1ed9i dung \u0111\u1ed9ng c\u0169ng c\u00f3 th\u1ec3 h\u01b0\u1edfng l\u1ee3i t\u1eeb c\u00e1c c\u00f4ng ngh\u1ec7 n\u00e0y. C\u00e1c c\u00f4ng ngh\u1ec7 t\u0103ng t\u1ed1c \u0111\u1ed9 truy\u1ec1n t\u1ea3i \u0111\u1ed9ng (dynamic acceleration) c\u1ee7a c\u00e1c h\u1ec7 th\u1ed1ng CDN hi\u1ec7n \u0111\u1ea1i kh\u00f4ng \u0111\u01a1n gi\u1ea3n ch\u1ec9 l\u01b0u tr\u1eef to\u00e0n b\u1ed9 trang web v\u00e0o b\u1ed9 \u0111\u1ec7m, m\u00e0 th\u00f4ng qua vi\u1ec7c t\u1ed1i \u01b0u h\u00f3a \u0111\u01b0\u1eddng d\u1eabn truy\u1ec1n d\u1eef li\u1ec7u, t\u00e1i s\u1eed d\u1ee5ng c\u00e1c k\u1ebft n\u1ed1i TCP, v\u00e0 c\u1ea3i thi\u1ec7n giao th\u1ee9c truy\u1ec1n th\u00f4ng, nh\u1eb1m gi\u00fap c\u00e1c y\u00eau c\u1ea7u t\u1eeb ng\u01b0\u1eddi d\u00f9ng \u0111\u1ebfn m\u00e1y ch\u1ee7 ngu\u1ed3n \u0111\u01b0\u1ee3c x\u1eed l\u00fd nhanh h\u01a1n.<\/p>\n\n\n\n

\u0110\u1ed1i v\u1edbi c\u00e1c n\u1ed9i dung \u0111\u1ed9ng nh\u01b0 API, c\u00e1c t\u01b0\u01a1ng t\u00e1c th\u1eddi gian th\u1ef1c \u2013 nh\u1eefng n\u1ed9i dung kh\u00f4ng th\u1ec3 \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef tr\u01b0\u1edbc \u2013 CDN (Content Delivery Network) c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng m\u1ea1ng l\u01b0\u1edbi ch\u00ednh ch\u1ea5t l\u01b0\u1ee3ng cao v\u00e0 c\u00e1c thu\u1eadt to\u00e1n \u0111\u1ecbnh tuy\u1ebfn th\u00f4ng minh \u0111\u1ec3 t\u00ecm ra con \u0111\u01b0\u1eddng c\u00f3 \u0111\u1ed9 tr\u1ec5 th\u1ea5p nh\u1ea5t v\u00e0 \u1ed5n \u0111\u1ecbnh nh\u1ea5t gi\u1eefa ng\u01b0\u1eddi d\u00f9ng v\u00e0 m\u00e1y ch\u1ee7 ngu\u1ed3n, t\u1eeb \u0111\u00f3 gi\u1ea3m th\u1eddi gian ph\u1ea3n h\u1ed3i c\u1ee7a c\u00e1c y\u00eau c\u1ea7u \u0111\u1ed9ng.<\/p>\n\n\n\n

L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o n\u1ed9i dung \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef trong b\u1ed9 \u0111\u1ec7m CDN (Content Delivery Network) \u0111\u01b0\u1ee3c c\u1eadp nh\u1eadt theo th\u1eddi gian th\u1ef1c?<\/h3>\n\n\n\n

Vi\u1ec7c \u0111\u1ea3m b\u1ea3o t\u00ednh th\u1eddi gian th\u1ef1c c\u1ee7a n\u1ed9i dung ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n th\u00f4ng qua hai c\u01a1 ch\u1ebf. Th\u1ee9 nh\u1ea5t l\u00e0 vi\u1ec7c l\u00e0m m\u1edbi b\u1ed9 \u0111\u1ec7m (cache refresh): Khi n\u1ed9i dung tr\u00ean m\u00e1y ch\u1ee7 ngu\u1ed3n (source server) \u0111\u01b0\u1ee3c c\u1eadp nh\u1eadt, y\u00eau c\u1ea7u l\u00e0m m\u1edbi s\u1ebd \u0111\u01b0\u1ee3c g\u1eedi ngay l\u1eadp t\u1ee9c \u0111\u1ebfn console c\u1ee7a CDN, t\u1eeb \u0111\u00f3 c\u00e1c b\u1ed9 \u0111\u1ec7m c\u0169 tr\u00ean c\u00e1c node edge s\u1ebd \u0111\u01b0\u1ee3c x\u00f3a \u0111i, bu\u1ed9c c\u00e1c l\u1ea7n truy c\u1eadp ti\u1ebfp theo ph\u1ea3i truy xu\u1ea5t n\u1ed9i dung m\u1edbi t\u1eeb m\u00e1y ch\u1ee7 ngu\u1ed3n.<\/p>\n\n\n\n

Lo\u1ea1i th\u1ee9 hai l\u00e0 thi\u1ebft l\u1eadp th\u1eddi gian h\u1ebft h\u1ea1n c\u1ee7a b\u1ed9 \u0111\u1ec7m m\u1ed9t c\u00e1ch h\u1ee3p l\u00fd. \u0110\u1ed1i v\u1edbi nh\u1eefng n\u1ed9i dung c\u1ea7n \u0111\u1ed9 ph\u1ea3n h\u1ed3i th\u1eddi gian th\u1ef1c cao, b\u1ea1n c\u00f3 th\u1ec3 thi\u1ebft l\u1eadp th\u1eddi gian h\u1ebft h\u1ea1n ng\u1eafn h\u01a1n trong ph\u1ea7n ti\u00eau \u0111\u1ec1 ph\u1ea3n h\u1ed3i (HTTP header) c\u1ee7a m\u00e1y ch\u1ee7 ngu\u1ed3n (source server). Cache-Control<\/code> Gi\u00e1 tr\u1ecb. Khi b\u1ed9 \u0111\u1ec7m h\u1ebft h\u1ea1n, n\u00fat s\u1ebd t\u1ef1 \u0111\u1ed9ng truy c\u1eadp ngu\u1ed3n g\u1ed1c \u0111\u1ec3 x\u00e1c th\u1ef1c ho\u1eb7c t\u1ea3i xu\u1ed1ng n\u1ed9i dung m\u1edbi nh\u1ea5t. Th\u00f4ng th\u01b0\u1eddng, ng\u01b0\u1eddi ta khuy\u1ebfn ngh\u1ecb s\u1eed d\u1ee5ng k\u1ebft h\u1ee3p c\u1ea3 hai ph\u01b0\u01a1ng ph\u00e1p n\u00e0y \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c s\u1ef1 c\u00e2n b\u1eb1ng t\u1ed1i \u01b0u gi\u1eefa hi\u1ec7u n\u0103ng v\u00e0 t\u00ednh th\u1eddi gian th\u1ef1c.<\/p>","protected":false},"excerpt":{"rendered":"

B\u00e0i vi\u1ebft n\u00e0y tr\u00ecnh b\u00e0y to\u00e0n di\u1ec7n v\u1ec1 nguy\u00ean l\u00fd k\u1ef9 thu\u1eadt v\u00e0 gi\u00e1 tr\u1ecb th\u1ef1c ti\u1ec5n c\u1ee7a m\u1ea1ng ph\u00e2n ph\u1ed1i n\u1ed9i dung (Content Delivery Network \u2013 CDN). N\u00f3 ph\u00e2n t\u00edch chi ti\u1ebft v\u1ec1 c\u1ea5u tr\u00fac c\u1ed1t l\u00f5i, c\u01a1 ch\u1ebf l\u01b0u tr\u1eef \u0111\u1ec7m (cache) v\u00e0 \u0111i\u1ec1u ph\u1ed1i (scheduling) c\u1ee7a CDN, \u0111\u1ed3ng th\u1eddi gi\u1ea3i th\u00edch vai tr\u00f2 quan tr\u1ecdng c\u1ee7a CDN trong vi\u1ec7c gi\u1ea3m \u0111\u1ed9 tr\u1ec5 m\u1ea1ng, gi\u1ea3m t\u1ea3i cho m\u00e1y ch\u1ee7 ngu\u1ed3n (source server) v\u00e0 b\u1ea3o v\u1ec7 trang web kh\u1ecfi c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng, t\u1eeb \u0111\u00f3 cung c\u1ea5p h\u01b0\u1edbng d\u1eabn h\u1eefu \u00edch cho vi\u1ec7c t\u1ed1i<\/p>","protected":false},"author":7,"featured_media":0,"template":"","meta":{"_acf_changed":false,"footnotes":""},"tags":[53,359,421],"knowledge_category":[278],"class_list":["post-12366836","knowledge_post","type-knowledge_post","status-publish","hentry","tag-cdn","tag-content-delivery-network","tag-website-performance","knowledge_category-cdn"],"acf":{"site_seo_keywords":"CDN\u539f\u7406,\u5185\u5bb9\u5206\u53d1\u7f51\u7edc,\u7f51\u7ad9\u6027\u80fd\u4f18\u5316,\u7f13\u5b58\u673a\u5236,\u8fb9\u7f18\u8282\u70b9,CDN\u670d\u52a1\u9009\u62e9,\u63d0\u5347\u8bbf\u95ee\u901f\u5ea6,\u7f13\u89e3\u6e90\u7ad9\u538b\u529b"},"_links":{"self":[{"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/knowledge_posts\/12366836","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/knowledge_posts"}],"about":[{"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/types\/knowledge_post"}],"author":[{"embeddable":true,"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/users\/7"}],"version-history":[{"count":0,"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/knowledge_posts\/12366836\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/media?parent=12366836"}],"wp:term":[{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/tags?post=12366836"},{"taxonomy":"knowledge_category","embeddable":true,"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/knowledge_category?post=12366836"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}