{"id":12377815,"date":"2026-03-19T13:03:08","date_gmt":"2026-03-19T05:03:08","guid":{"rendered":"https:\/\/www.likacloud.com\/knowledge\/cdn-%e6%8a%80%e6%9c%af%e8%af%a6%e8%a7%a3%ef%bc%9a%e5%8a%a0%e9%80%9f%e7%bd%91%e7%ab%99%e8%ae%bf%e9%97%ae%e3%80%81%e6%8f%90%e5%8d%87%e7%94%a8%e6%88%b7%e4%bd%93%e9%aa%8c%e7%9a%84%e6%a0%b8%e5%bf%83\/"},"modified":"2026-03-19T13:10:55","modified_gmt":"2026-03-19T05:10:55","slug":"cdn-technology-explained-accelerate-website-speed-improve-user","status":"publish","type":"knowledge_post","link":"https:\/\/www.likacloud.com\/vi\/knowledge\/cdn\/cdn-technology-explained-accelerate-website-speed-improve-user\/","title":{"rendered":"CDN (Content Delivery Network) \u2013 Gi\u1ea3i th\u00edch chi ti\u1ebft v\u1ec1 c\u00f4ng ngh\u1ec7 n\u00e0y: Nguy\u00ean l\u00fd c\u1ed1t l\u00f5i gi\u00fap t\u0103ng t\u1ed1c \u0111\u1ed9 truy c\u1eadp website v\u00e0 n\u00e2ng cao tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng"},"content":{"rendered":"

Trong k\u1ef7 nguy\u00ean k\u1ef9 thu\u1eadt s\u1ed1, t\u1ed1c \u0111\u1ed9 t\u1ea3i trang web \u0111\u00e3 tr\u1edf th\u00e0nh y\u1ebfu t\u1ed1 then ch\u1ed1t quy\u1ebft \u0111\u1ecbnh tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng v\u00e0 s\u1ef1 th\u00e0nh b\u1ea1i c\u1ee7a doanh nghi\u1ec7p. Ng\u01b0\u1eddi d\u00f9ng c\u00f3 \u0111\u1ed9 ch\u1ecbu \u0111\u1ef1ng r\u1ea5t th\u1ea5p \u0111\u1ed1i v\u1edbi s\u1ef1 tr\u00ec ho\u00e3n; ch\u1ec9 c\u1ea7n ph\u1ea3i ch\u1edd v\u00e0i gi\u00e2y th\u00f4i c\u0169ng c\u00f3 th\u1ec3 khi\u1ebfn h\u1ecd r\u1eddi b\u1ecf trang web. M\u1ea1ng l\u01b0\u1edbi ph\u00e2n ph\u1ed1i n\u1ed9i dung (Content Delivery Network \u2013 CDN) ch\u00ednh l\u00e0 c\u00f4ng ngh\u1ec7 \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n \u0111\u1ec3 gi\u1ea3i quy\u1ebft v\u1ea5n \u0111\u1ec1 c\u1ed1t l\u00f5i n\u00e0y. B\u1eb1ng c\u00e1ch tri\u1ec3n khai m\u1ed9t s\u1ed1 l\u01b0\u1ee3ng l\u1edbn m\u00e1y ch\u1ee7 \u0111\u1ec7m tr\u00ean to\u00e0n th\u1ebf gi\u1edbi, CDN ph\u00e2n ph\u1ed1i c\u00e1c t\u00e0i nguy\u00ean t\u0129nh c\u1ee7a trang web m\u1ed9t c\u00e1ch linh ho\u1ea1t \u0111\u1ebfn n\u01a1i g\u1ea7n ng\u01b0\u1eddi d\u00f9ng nh\u1ea5t, t\u1eeb \u0111\u00f3 gi\u1ea3m \u0111\u00e1ng k\u1ec3 kho\u1ea3ng c\u00e1ch truy\u1ec1n d\u1eef li\u1ec7u v\u00e0 t\u00ecnh tr\u1ea1ng qu\u00e1 t\u1ea3i m\u1ea1ng, gi\u00fap t\u0103ng t\u1ed1c \u0111\u1ed9 truy c\u1eadp l\u00ean m\u1ee9c h\u00e0ng miligi\u00e2y.<\/p>\n\n\n\n

Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ed1t l\u00f5i c\u1ee7a CDN<\/h2>\n\n\n\n

CDN (Content Delivery Network) 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 g\u1ed3m nhi\u1ec1u th\u00e0nh ph\u1ea7n ho\u1ea1t \u0111\u1ed9ng c\u00f9ng nhau. M\u1ee5c ti\u00eau ch\u00ednh c\u1ee7a n\u00f3 l\u00e0 cung c\u1ea5p n\u1ed9i dung m\u1ed9t c\u00e1ch nhanh ch\u00f3ng v\u00e0 hi\u1ec7u qu\u1ea3, b\u1eb1ng c\u00e1ch gi\u00fap ng\u01b0\u1eddi d\u00f9ng truy c\u1eadp v\u00e0o nh\u1eefng m\u00e1y ch\u1ee7 n\u1eb1m g\u1ea7n nh\u1ea5t v\u1ec1 m\u1eb7t v\u1ecb tr\u00ed \u0111\u1ecba l\u00fd v\u00e0 c\u1ea5u tr\u00fac m\u1ea1ng.<\/p>\n\n\n\n

L\u01b0u tr\u1eef v\u00e0 ph\u00e2n ph\u1ed1i n\u1ed9i dung<\/h3>\n\n\n\n

M\u00e1y ch\u1ee7 ngu\u1ed3n (origin server) l\u00e0 ngu\u1ed3n cung c\u1ea5p n\u1ed9i dung cu\u1ed1i c\u00f9ng, l\u01b0u tr\u1eef d\u1eef li\u1ec7u g\u1ed1c c\u1ee7a trang web. Khi trang web \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i v\u1edbi h\u1ec7 th\u1ed1ng CDN (Content Delivery Network), c\u00e1c t\u00e0i nguy\u00ean t\u0129nh (static resources) s\u1ebd \u0111\u01b0\u1ee3c t\u1ef1 \u0111\u1ed9ng ph\u00e2n ph\u1ed1i \u0111\u1ebfn c\u00e1c node (n\u00fat) \u1edf kh\u1eafp n\u01a1i tr\u00ean th\u1ebf gi\u1edbi. C\u00e1c lo\u1ea1i n\u1ed9i dung c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef trong b\u1ed9 \u0111\u1ec7m (cache) bao g\u1ed3m h\u00ecnh \u1ea3nh, b\u1ea3ng \u0111\u1ecbnh d\u1ea1ng (style sheets), video, t\u00e0i li\u1ec7u, v.v. M\u1ed9t khi c\u00e1c t\u00e0i nguy\u00ean n\u00e0y \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef trong b\u1ed9 \u0111\u1ec7m c\u1ee7a c\u00e1c node, c\u00e1c y\u00eau c\u1ea7u truy c\u1eadp sau \u0111\u00f3 s\u1ebd kh\u00f4ng c\u1ea7n ph\u1ea3i truy v\u1ec1 m\u00e1y ch\u1ee7 ngu\u1ed3n m\u1ed7i l\u1ea7n; thay v\u00e0o \u0111\u00f3, d\u1ecbch v\u1ee5 s\u1ebd \u0111\u01b0\u1ee3c cung c\u1ea5p tr\u1ef1c ti\u1ebfp t\u1eeb c\u00e1c node \u0111<\/p>\n\n\n\n

\u0110i\u1ec1u ph\u1ed1i th\u00f4ng minh v\u00e0 c\u00e2n b\u1eb1ng t\u1ea3i<\/h3>\n\n\n\n

Khi ng\u01b0\u1eddi d\u00f9ng y\u00eau c\u1ea7u m\u1ed9t t\u00e0i nguy\u00ean, h\u1ec7 th\u1ed1ng l\u1eadp l\u1ecbch th\u00f4ng minh \u0111\u00f3ng vai tr\u00f2 l\u00e0 \u201ctrung t\u00e2m \u0111i\u1ec1u h\u01b0\u1edbng\u201d trong to\u00e0n b\u1ed9 qu\u00e1 tr\u00ecnh. \u0110\u1ea7u ti\u00ean, h\u1ec7 th\u1ed1ng n\u00e0y s\u1ebd ph\u00e2n t\u00edch y\u00eau c\u1ea7u c\u1ee7a ng\u01b0\u1eddi d\u00f9ng v\u00e0 chuy\u1ec3n \u0111\u1ecba ch\u1ec9 t\u00ean mi\u1ec1n \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u \u0111\u1ebfn m\u1ea1ng l\u01b0\u1edbi CDN (Content Delivery Network). Sau \u0111\u00f3, d\u1ef1a tr\u00ean m\u1ed9t b\u1ed9 quy t\u1eafc ph\u1ee9c t\u1ea1p, h\u1ec7 th\u1ed1ng s\u1ebd ch\u1ecdn cho ng\u01b0\u1eddi d\u00f9ng m\u1ed9t node (n\u00fat) \u1edf g\u1ea7n nh\u1ea5t v\u00e0 ph\u00f9 h\u1ee3p nh\u1ea5t \u0111\u1ec3 cung c\u1ea5p t\u00e0i nguy\u00ean \u0111\u00f3.<\/p>\n\n\n\n

C\u00e1c y\u1ebfu t\u1ed1 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u00e0m c\u01a1 s\u1edf cho c\u00e1c quy\u1ebft \u0111\u1ecbnh n\u00e0y bao g\u1ed3m: \u0111\u1ecba ch\u1ec9 IP c\u1ee7a ng\u01b0\u1eddi d\u00f9ng v\u00e0 kho\u1ea3ng c\u00e1ch \u0111\u1ecba l\u00fd gi\u1eefa h\u1ecd v\u1edbi c\u00e1c n\u00fat trong m\u1ea1ng, t\u00ecnh tr\u1ea1ng t\u1ea3i v\u00e0 tr\u1ea1ng th\u00e1i s\u1ee9c kh\u1ecfe hi\u1ec7n t\u1ea1i c\u1ee7a t\u1eebng n\u00fat, c\u0169ng nh\u01b0 m\u1ee9c \u0111\u1ed9 t\u1eafc ngh\u1ebdn m\u1ea1ng trong th\u1eddi gian th\u1ef1c. Nh\u1edd v\u00e0o h\u1ec7 th\u1ed1ng l\u1eadp l\u1ecbch th\u00f4ng minh, CDN kh\u00f4ng ch\u1ec9 \u0111\u1ea3m b\u1ea3o t\u1ed1c \u0111\u1ed9 truy c\u1eadp m\u00e0 c\u00f2n gi\u00fap ph\u00e2n b\u1ed5 l\u01b0u l\u01b0\u1ee3ng m\u1ea1ng m\u1ed9t c\u00e1ch \u0111\u1ec1u \u0111\u1eb7n, ng\u0103n ch\u1eb7n t\u00ecnh tr\u1ea1ng qu<\/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

Mekanisme truy xu\u1ea5t ngu\u1ed3n (Origin Pulling) v\u00e0 c\u1eadp nh\u1eadt b\u1ed9 \u0111\u1ec7m (Cache Updating)<\/h3>\n\n\n\n

Khi c\u00e1c n\u00fat bi\u00ean (edge nodes) kh\u00f4ng c\u00f3 t\u00e0i nguy\u00ean m\u00e0 ng\u01b0\u1eddi d\u00f9ng y\u00eau c\u1ea7u, ho\u1eb7c khi t\u00e0i nguy\u00ean \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef trong b\u1ed9 \u0111\u1ec7m (cache) \u0111\u00e3 h\u1ebft h\u1ea1n, c\u00e1c n\u00fat n\u00e0y s\u1ebd g\u1eedi y\u00eau c\u1ea7u \u0111\u1ebfn m\u00e1y ch\u1ee7 ngu\u1ed3n (origin server) \u0111\u1ec3 l\u1ea5y n\u1ed9i dung m\u1edbi nh\u1ea5t. Qu\u00e1 tr\u00ecnh n\u00e0y \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u201ckh\u00f4i ph\u1ee5c ngu\u1ed3n\u201d (back-to-source). \u0110\u1ec3 gi\u1ea3m thi\u1ec3u t\u1ed1i \u0111a vi\u1ec7c kh\u00f4i ph\u1ee5c ngu\u1ed3n v\u00e0 n\u00e2ng cao t\u1ef7 l\u1ec7 truy c\u1eadp th\u00e0nh c\u00f4ng, c\u00e1c nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 CDN (Content Delivery Network) s\u1ebd cung c\u1ea5p c\u00e1c quy t\u1eafc l<\/p>\n\n\n\n

Qu\u1ea3n tr\u1ecb vi\u00ean trang web c\u00f3 th\u1ec3 thi\u1ebft l\u1eadp th\u1eddi h\u1ea1n hi\u1ec7u l\u1ef1c c\u1ee7a b\u1ed9 \u0111\u1ec7m cho c\u00e1c th\u01b0 m\u1ee5c ho\u1eb7c lo\u1ea1i t\u1ec7p kh\u00e1c nhau, nh\u1eb1m ki\u1ec3m so\u00e1t t\u1ea7n su\u1ea5t c\u1eadp nh\u1eadt c\u00e1c t\u00e0i nguy\u00ean tr\u00ean c\u00e1c n\u00fat bi\u00ean (edge nodes). \u0110\u1ed1i v\u1edbi n\u1ed9i dung \u0111\u1ed9ng ho\u1eb7c nh\u1eefng t\u00e0i nguy\u00ean c\u1ea7n \u0111\u01b0\u1ee3c c\u1eadp nh\u1eadt ngay l\u1eadp t\u1ee9c, h\u1ecd c\u0169ng c\u00f3 th\u1ec3 \u0111\u1eb7t th\u1eddi gian l\u01b0u tr\u1eef trong b\u1ed9 \u0111\u1ec7m ng\u1eafn h\u01a1n ho\u1eb7c \u00e1p d\u1ee5ng quy t\u1eafc \u201ckh\u00f4ng l\u01b0u tr\u1eef trong b\u1ed9 \u0111\u1ec7m\u201d, \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o t\u00ednh th\u1eddi gian th<\/p>\n\n\n\n

C\u00e1c th\u00e0nh ph\u1ea7n c\u00f4ng ngh\u1ec7 ch\u00ednh c\u1ee7a CDN<\/h2>\n\n\n\n

M\u1ed9t m\u1ea1ng l\u01b0\u1edbi CDN (Content Delivery Network) chuy\u00ean nghi\u1ec7p ph\u1ee5 thu\u1ed9c v\u00e0o s\u1ef1 ph\u1ed1i h\u1ee3p ch\u1eb7t ch\u1ebd gi\u1eefa nhi\u1ec1u c\u00f4ng ngh\u1ec7 c\u01a1 b\u1ea3n, \u0111\u1ec3 c\u00f9ng nhau x\u00e2y d\u1ef1ng n\u00ean m\u1ed9t h\u1ec7 th\u1ed1ng ph\u00e2n ph\u1ed1i n\u1ed9i dung hi\u1ec7u qu\u1ea3 v\u00e0 \u0111\u00e1ng tin c\u1eady.<\/p>\n\n\n\n

C\u00e2n b\u1eb1ng t\u1ea3i to\u00e0n c\u1ea7u<\/h3>\n\n\n\n

GSLB (Global Server Load Balancing) ch\u00ednh l\u00e0 \u201cb\u1ed9 n\u00e3o\u201d c\u1ee7a h\u1ec7 th\u1ed1ng CDN (Content Delivery Network), ho\u1ea1t \u0111\u1ed9ng \u1edf t\u1ea7ng x\u1eed l\u00fd ph\u00e2n t\u00edch DNS (Domain Name System). Khi m\u00e1y ch\u1ee7 DNS c\u1ee5c b\u1ed9 g\u1eedi y\u00eau c\u1ea7u tra c\u1ee9u \u0111\u1ebfn m\u00e1y ch\u1ee7 DNS \u0111\u01b0\u1ee3c \u1ee7y quy\u1ec1n c\u1ee7a CDN, GSLB s\u1ebd tr\u1ea3 v\u1ec1 \u0111\u1ecba ch\u1ec9 IP c\u1ee7a n\u00fat c\u1ea1nh (edge node) ph\u00f9 h\u1ee3p nh\u1ea5t theo c\u00e1c ch\u00ednh s\u00e1ch \u0111\u00e3 \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp tr\u01b0\u1edbc. N\u00f3 s\u1eed d\u1ee5ng nhi\u1ec1u thu\u1eadt to\u00e1n ph\u00e2n b\u1ed5 t\u1ea3i kh\u00e1c nhau, ch\u1eb3ng h\u1ea1n nh\u01b0 ph\u00e2n b\u1ed5 d\u1ef1a tr\u00ean v\u1ecb tr\u00ed \u0111\u1ecba l\u00fd ho\u1eb7c d\u1ef1a tr\u00ean c\u00e1c ti\u00eau ch\u00ed chi\u1ebfn l\u01b0\u1ee3c c\u1ee5 th\u1ec3, gi\u00fap \u0111\u1ea3m b\u1ea3o r\u1eb1ng ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 truy c\u1eadp v\u00e0o n\u00fat g\u1ea7n nh\u1ea5t.<\/p>\n\n\n\n

Edge nodes and cache servers<\/h3>\n\n\n\n

C\u00e1c n\u00fat bi\u00ean (edge nodes) l\u00e0 \u201ctay ch\u00e2n\u201d c\u1ee7a h\u1ec7 th\u1ed1ng CDN (Content Delivery Network), \u0111\u00f3ng vai tr\u00f2 l\u00e0 nh\u1eefng th\u1ef1c th\u1ec3 v\u1eadt l\u00fd tr\u1ef1c ti\u1ebfp cung c\u1ea5p d\u1ecbch v\u1ee5 cho ng\u01b0\u1eddi d\u00f9ng cu\u1ed1i. M\u1ed7i n\u00fat \u0111\u1ec1u \u0111\u01b0\u1ee3c trang b\u1ecb c\u00e1c m\u00e1y ch\u1ee7 \u0111\u1ec7m (cache servers) v\u00e0 thi\u1ebft b\u1ecb l\u01b0u tr\u1eef (storage devices) c\u00f3 hi\u1ec7u su\u1ea5t cao. \u0110\u1ec3 t\u1ed1i \u0111a h\u00f3a t\u1ef7 l\u1ec7 truy c\u1eadp th\u00e0nh c\u00f4ng (hit rate), c\u00e1c n\u00fat n\u00e0y th\u01b0\u1eddng s\u1eed d\u1ee5ng c\u1ea5u tr\u00fac \u0111\u1ec7m \u0111a c\u1ea5p, k\u1ebft h\u1ee3p gi\u1eefa b\u1ed9 \u0111\u1ec7m trong b\u1ed9 nh\u1edb (memory cache) v\u00e0 \u1ed5 \u0111\u0129a solid-state (SSD cache), nh\u1eb1m \u0111\u1ea3m b\u1ea3o r\u1eb1ng nh\u1eefng t\u00e0i nguy\u00ean ph\u1ed5 bi\u1ebfn nh\u1ea5t c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ph\u1ee5c v\u1ee5 v\u1edbi t\u1ed1c \u0111\u1ed9 nhanh nh\u1ea5t.<\/p>\n\n\n\n

Content Routing and Distribution Technologies<\/h3>\n\n\n\n

Vi\u1ec7c \u0111\u1ed3ng b\u1ed9 n\u1ed9i dung m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 t\u1eeb m\u00e1y ch\u1ee7 ngu\u1ed3n \u0111\u1ebfn h\u00e0ng ng\u00e0n n\u00fat chuy\u1ec3n ti\u1ebfp (edge nodes) l\u00e0 m\u1ed9t trong nh\u1eefng th\u00e1ch th\u1ee9c c\u1ed1t l\u00f5i c\u1ee7a c\u00f4ng ngh\u1ec7 CDN (Content Delivery Network). C\u00e1c k\u1ef9 thu\u1eadt ph\u00e2n ph\u1ed1i ph\u1ed5 bi\u1ebfn bao g\u1ed3m vi\u1ec7c g\u1eedi n\u1ed9i dung t\u1ef1 \u0111\u1ed9ng (active pushing) v\u00e0 vi\u1ec7c l\u1ea5y n\u1ed9i dung theo y\u00ea<\/p>\n\n\n\n

\u201cCh\u1ebf \u0111\u1ed9 \u0111\u1ea9y n\u1ed9i dung t\u1ef1 \u0111\u1ed9ng\u201d (Active Push) c\u00f3 ngh\u0129a l\u00e0 m\u00e1y ch\u1ee7 ngu\u1ed3n t\u1ef1 \u0111\u1ed9ng \u0111\u0103ng t\u1ea3i n\u1ed9i dung l\u00ean m\u1ed9t s\u1ed1 ho\u1eb7c t\u1ea5t c\u1ea3 c\u00e1c n\u00fat \u0111\u1ea7u cu\u1ed1i (edge nodes), ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c b\u1ea3n c\u1eadp nh\u1eadt quan tr\u1ecdng ho\u1eb7c vi\u1ec7c l\u00e0m n\u00f3ng n\u1ed9i dung ph\u1ed5 bi\u1ebfn tr\u01b0\u1edbc khi ch\u00fang \u0111\u01b0\u1ee3c ph\u00e1t h\u00e0nh. Ng\u01b0\u1ee3c l\u1ea1i, \u201cch\u1ebf \u0111\u1ed9 k\u00e9o n\u1ed9i dung th\u1ee5 \u0111\u1ed9ng\u201d (Passive Pull) s\u1ebd \u0111\u01b0\u1ee3c k\u00edch ho\u1ea1t theo y\u00eau c\u1ea7u c\u1ee7a ng\u01b0\u1eddi d\u00f9ng, gi\u00fap truy xu\u1ea5t n\u1ed9i dung t\u1eeb m\u00e1y ch\u1ee7 ngu\u1ed3n m\u1ed9t c\u00e1ch t\u1ee9c th\u00ec v\u00e0 theo nhu c\u1ea7u, t\u1eeb \u0111\u00f3 ti\u1ebft ki\u1ec7m t\u00e0i nguy\u00ean l\u01b0u tr\u1eef. Ngo\u00e0i ra, c\u00f4ng ngh\u1ec7 P2P c\u0169ng \u0111\u01b0\u1ee3c<\/p>\n\n\n\n

C\u01a1 ch\u1ebf b\u1ea3o m\u1eadt v\u00e0 an ninh<\/h3>\n\n\n\n

C\u00e1c h\u1ec7 th\u1ed1ng CDN (Content Delivery Network) hi\u1ec7n \u0111\u1ea1i \u0111\u00e3 v\u01b0\u1ee3t xa ch\u1ee9c n\u0103ng \u0111\u01a1n thu\u1ea7n l\u00e0 t\u0103ng t\u1ed1c truy c\u1eadp n\u1ed9i dung, v\u00e0 \u0111\u01b0\u1ee3c t\u00edch h\u1ee3p nhi\u1ec1u t\u00ednh n\u0103ng b\u1ea3o m\u1eadt m\u1ea1nh m\u1ebd. Nh\u1edd v\u00e0o c\u1ea5u tr\u00fac ph\u00e2n t\u00e1n, CDN c\u00f3 th\u1ec3 ch\u1ed1ng l\u1ea1i c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng t\u1eeb ch\u1ed1i d\u1ecbch v\u1ee5 (DDoS) m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3, l\u1ecdc v\u00e0 lo\u1ea1i b\u1ecf l\u01b0u l\u01b0\u1ee3ng \u0111\u1ed9c h\u1ea1i t\u1ea1i c\u00e1c node (n\u00fat) \u1edf periphery (r\u00eca m\u1ea1ng), t\u1eeb \u0111\u00f3 b\u1ea3o v\u1ec7 c\u00e1c m\u00e1y ch\u1ee7 ngu\u1ed3n kh\u1ecfi b\u1ecb x\u00e2m nh\u1eadp.<\/p>\n\n\n\n

\u0110\u1ed3ng th\u1eddi, CDN c\u0169ng cung c\u1ea5p c\u00e1c t\u00ednh n\u0103ng nh\u01b0 t\u0103ng t\u1ed1c truy c\u1eadp qua giao th\u1ee9c HTTPS, b\u1ea3o v\u1ec7 n\u1ed9i dung kh\u1ecfi vi\u1ec7c b\u1ecb sao ch\u00e9p tr\u00e1i ph\u00e9p (anti-hotlinking), ph\u00e1t hi\u1ec7n h\u00e0nh vi chi\u1ebfm \u0111o\u1ea1t t\u00ean mi\u1ec1n (domain hijacking), v\u00e0 b\u1ea3o m\u1eadt \u1ee9ng d\u1ee5ng web (Web Application Firewall), nh\u1eb1m \u0111\u1ea3m b\u1ea3o an to\u00e0n v\u00e0 t\u00ednh h\u1ee3p ph\u00e1p trong qu\u00e1 tr<\/p>\n\n\n\n

Nh\u1eefng l\u1ee3i \u00edch ch\u00ednh m\u00e0 CDN mang l\u1ea1i<\/h2>\n\n\n\n

Vi\u1ec7c s\u1eed d\u1ee5ng d\u1ecbch v\u1ee5 CDN (Content Delivery Network) mang l\u1ea1i nhi\u1ec1u l\u1ee3i \u00edch \u0111\u00e1ng k\u1ec3 cho c\u1ea3 ng\u01b0\u1eddi v\u1eadn h\u00e0nh trang web l\u1eabn ng\u01b0\u1eddi d\u00f9ng cu\u1ed1i c\u00f9ng; nh\u1eefng \u01b0u \u0111i\u1ec3m n\u00e0y \u0111\u01b0\u1ee3c chuy\u1ec3n h\u00f3a tr\u1ef1c ti\u1ebfp th\u00e0nh l\u1ee3i nhu\u1eadn kinh doanh v\u00e0 l\u1ee3i th\u1ebf c\u1ea1nh tranh.<\/p>\n\n\n\n

N\u00e2ng cao \u0111\u00e1ng k\u1ec3 hi\u1ec7u su\u1ea5t trang web v\u00e0 tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng<\/h3>\n\n\n\n

L\u1ee3i \u00edch tr\u1ef1c ti\u1ebfp nh\u1ea5t l\u00e0 t\u1ed1c \u0111\u1ed9 truy c\u1eadp \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n \u0111\u00e1ng k\u1ec3. B\u1eb1ng c\u00e1ch gi\u1ea3m \u0111\u1ed9 tr\u1ec5 m\u1ea1ng v\u00e0 tr\u00e1nh c\u00e1c \u0111i\u1ec3m ngh\u1ebdn tr\u00ean m\u1ea1ng, th\u1eddi gian t\u1ea3i trang c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c r\u00fat ng\u1eafn xu\u1ed1ng h\u01a1n 501% (t\u1ee9c l\u00e0 gi\u1ea3m kho\u1ea3ng 501 l\u1ea7n so v\u1edbi m\u1ee9c ban \u0111\u1ea7u). T\u1ed1c \u0111\u1ed9 cao h\u01a1n \u0111\u1ed3ng ngh\u0129a v\u1edbi t\u1ef7 l\u1ec7 ng\u01b0\u1eddi d\u00f9ng r\u1eddi trang th\u1ea5p h\u01a1n, l\u01b0\u1ee3ng truy c\u1eadp v\u00e0o trang t\u0103ng l\u00ean, th\u1eddi gian \u1edf l\u1ea1i trang d\u00e0i h\u01a1n, v\u00e0 cu\u1ed1i c\u00f9ng l\u00e0 t\u1ef7 l\u1ec7 chuy\u1ec3n \u0111\u1ed5i (t\u1ee9c l\u00e0 s\u1ed1 l\u01b0\u1ee3ng<\/p>\n\n\n\n

\u0110\u1ed1i v\u1edbi c\u00e1c ng\u00e0nh nh\u01b0 th\u01b0\u01a1ng m\u1ea1i \u0111i\u1ec7n t\u1eed, truy\u1ec1n th\u00f4ng, gi\u00e1o d\u1ee5c tr\u1ef1c tuy\u1ebfn \u2013 nh\u1eefng ng\u00e0nh ph\u1ee5 thu\u1ed9c r\u1ea5t nhi\u1ec1u v\u00e0o n\u1ed9i dung \u2013 vi\u1ec7c c\u1ea3i thi\u1ec7n tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng c\u00f3 m\u1ed1i li\u00ean h\u1ec7 tr\u1ef1c ti\u1ebfp \u0111\u1ebfn t\u0103ng tr\u01b0\u1edfng doanh thu.<\/p>\n\n\n\n

Gi\u1ea3m \u0111\u00e1ng k\u1ec3 t\u1ea3i l\u01b0\u1ee3ng tr\u00ean m\u00e1y ch\u1ee7 ngu\u1ed3n v\u00e0 chi ph\u00ed b\u0103ng th\u00f4ng.<\/h3>\n\n\n\n

Do h\u1ea7u h\u1ebft c\u00e1c y\u00eau c\u1ea7u t\u1eeb ng\u01b0\u1eddi d\u00f9ng \u0111\u1ec1u \u0111\u01b0\u1ee3c x\u1eed l\u00fd b\u1edfi c\u00e1c n\u00fat c\u1ea1nh (edge nodes), l\u01b0\u1ee3ng l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp ngu\u1ed3n (origin traffic) \u0111\u00e3 gi\u1ea3m \u0111\u00e1ng k\u1ec3. \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 c\u00e1c m\u00e1y ch\u1ee7 ngu\u1ed3n (source servers) s\u1ebd c\u1ea7n \u00edt t\u00e0i nguy\u00ean t\u00ednh to\u00e1n, b\u0103ng th\u00f4ng m\u1ea1ng v\u00e0 c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng h\u01a1n. \u0110\u1ed1i v\u1edbi nh\u1eefng trang web c\u00f3 l\u01b0u l\u01b0\u1ee3ng thay \u0111\u1ed5i th\u1ea5t th\u01b0\u1eddng, c\u00f4ng ngh\u1ec7 CDN (Content Delivery Network) c\u00f3 th\u1ec3 gi\u00fap \u1ed5n \u0111\u1ecbnh d\u00f2ng l\u01b0u l\u01b0\u1ee3ng, ng\u0103n ch\u1eb7n t\u00ecnh tr\u1ea1ng qu\u00e1 t\u1ea3i v\u00e0 s\u1eadp m\u00e1y ch\u1ee7 ngu\u1ed3n do l\u01b0u l\u01b0\u1ee3ng \u0111\u1ed9t ng\u1ed9t t\u0103ng cao.<\/p>\n\n\n\n

X\u00e9t t\u1eeb g\u00f3c \u0111\u1ed9 chi ph\u00ed, chi ph\u00ed b\u0103ng th\u00f4ng c\u1ee7a c\u00e1c n\u00fat bi\u00ean (edge nodes) th\u01b0\u1eddng th\u1ea5p h\u01a1n nhi\u1ec1u so v\u1edbi gi\u00e1 b\u0103ng th\u00f4ng c\u1ee7a m\u00e1y ch\u1ee7 ngu\u1ed3n (source server) ho\u1eb7c d\u1ecbch v\u1ee5 \u0111\u00e1m m\u00e2y. \u0110i\u1ec1u n\u00e0y gi\u00fap c\u00e1c doanh nghi\u1ec7p v\u1eeba \u0111\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng d\u1ecbch v\u1ee5, v\u1eeba t\u1ed1i \u01b0u h\u00f3a t\u1ed5ng chi ph\u00ed CNTT c\u1ee7a m\u00ecnh.<\/p>\n\n\n\n

N\u00e2ng cao t\u00ednh kh\u1ea3 d\u1ee5ng to\u00e0n c\u1ea7u v\u00e0 t\u00ednh d\u1ef1 ph\u00f2ng (s\u1ef1 \u0111a d\u1ea1ng) trong ho\u1ea1t \u0111\u1ed9ng kinh doanh.<\/h3>\n\n\n\n

C\u1ea5u tr\u00fac ph\u00e2n t\u00e1n c\u1ee7a CDN t\u1ef1 nhi\u00ean mang l\u1ea1i kh\u1ea3 n\u0103ng s\u1eb5n s\u00e0ng cao v\u00e0 kh\u1ea3 n\u0103ng ph\u1ee5c h\u1ed3i sau th\u1ea3m h\u1ecda. Ngay c\u1ea3 khi trung t\u00e2m d\u1eef li\u1ec7u \u1edf m\u1ed9t khu v\u1ef1c n\u00e0o \u0111\u00f3 g\u1eb7p s\u1ef1 c\u1ed1, h\u1ec7 th\u1ed1ng \u0111i\u1ec1u ph\u1ed1i th\u00f4ng minh v\u1eabn c\u00f3 th\u1ec3 chuy\u1ec3n h\u01b0\u1edbng l\u01b0u l\u01b0\u1ee3ng ng\u01b0\u1eddi d\u00f9ng m\u1ed9t c\u00e1ch li\u1ec1n m\u1ea1ch sang c\u00e1c n\u00fat kh\u00e1c \u0111ang ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng, \u0111\u1ea3m b\u1ea3o t\u00ednh li\u00ean t\u1ee5c c\u1ee7a d\u1ecbch v\u1ee5.<\/p>\n\n\n\n

\u0110\u1ed1i v\u1edbi c\u00e1c doanh nghi\u1ec7p ho\u1ea1t \u0111\u1ed9ng tr\u00ean ph\u1ea1m vi to\u00e0n c\u1ea7u, kh\u00f4ng c\u1ea7n ph\u1ea3i x\u00e2y d\u1ef1ng c\u00e1c trung t\u00e2m d\u1eef li\u1ec7u t\u1ea1i t\u1eebng \u0111\u1ecba \u0111i\u1ec3m. Ch\u1ec9 c\u1ea7n s\u1eed d\u1ee5ng c\u00f4ng ngh\u1ec7 CDN (Content Delivery Network), h\u1ecd c\u00f3 th\u1ec3 tri\u1ec3n khai n\u1ed9i dung m\u1ed9t c\u00e1ch to\u00e0n c\u1ea7u, \u0111\u1ea3m b\u1ea3o r\u1eb1ng ng\u01b0\u1eddi d\u00f9ng \u1edf m\u1ecdi n\u01a1i \u0111\u1ec1u nh\u1eadn \u0111\u01b0\u1ee3c tr\u1ea3i nghi\u1ec7m truy c\u1eadp nh\u1ea5t qu\u00e1n v\u00e0 m\u01b0\u1ee3t m\u00e0. \u0110i\u1ec1u n\u00e0y gi\u00fap gi\u1ea3m \u0111\u00e1ng k\u1ec3 \u0111\u1ed9 ph\u1ee9c t\u1ea1p v\u00e0 chi ph\u00ed trong qu\u00e1 tr\u00ecnh m\u1edf r\u1ed9ng kinh doanh.<\/p>\n\n\n\n

T\u00edch h\u1ee3p an ninh v\u00e0 s\u1ef1 thu\u1eadn ti\u1ec7n trong qu\u1ea3n tr\u1ecb v\u1eadn h\u00e0nh<\/h3>\n\n\n\n

Vi\u1ec7c t\u00edch h\u1ee3p c\u00e1c kh\u1ea3 n\u0103ng b\u1ea3o m\u1eadt v\u00e0o t\u1ea7ng CDN gi\u00fap qu\u00e1 tr\u00ecnh tri\u1ec3n khai v\u00e0 th\u1ef1c thi c\u00e1c ch\u00ednh s\u00e1ch b\u1ea3o m\u1eadt tr\u1edf n\u00ean thu\u1eadn ti\u1ec7n v\u00e0 hi\u1ec7u qu\u1ea3 h\u01a1n. Qu\u1ea3n tr\u1ecb vi\u00ean c\u00f3 th\u1ec3 c\u1ea5u h\u00ecnh c\u00e1c quy t\u1eafc b\u1ea3o m\u1eadt, xem nh\u1eadt k\u00fd c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng, v\u00e0 ph\u00e2n t\u00edch b\u00e1o c\u00e1o l\u01b0u l\u01b0\u1ee3ng th\u00f4ng qua m\u1ed9t giao di\u1ec7n \u0111i\u1ec1u khi\u1ec3n t\u1eadp trung.<\/p>\n\n\n\n

\u0110\u1ed3ng th\u1eddi, c\u00e1c nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 CDN (Content Delivery Network) ch\u1ecbu tr\u00e1ch nhi\u1ec7m v\u1ec1 vi\u1ec7c v\u1eadn h\u00e0nh, b\u1ea3o tr\u00ec c\u00e1c n\u00fat c\u01a1 s\u1edf, t\u1ed1i \u01b0u h\u00f3a m\u1ea1ng v\u00e0 n\u00e2ng c\u1ea5p ph\u1ea7n c\u1ee9ng, gi\u00fap \u0111\u1ed9i ng\u0169 v\u1eadn h\u00e0nh trang web t\u1eadp trung h\u01a1n v\u00e0o vi\u1ec7c ph\u00e1t tri\u1ec3n logic kinh doanh c\u1ed1t l\u00f5i, thay v\u00ec ph\u1ea3i qu\u1ea3n l\u00fd c\u00e1c h\u1ec7 th\u1ed1ng c\u01a1 s\u1edf h\u1ea1 t<\/p>\n\n\n\n

L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 ch\u1ecdn v\u00e0 tri\u1ec3n khai m\u1ed9t h\u1ec7 th\u1ed1ng CDN (Content Delivery Network)?<\/h2>\n\n\n\n

Tr\u01b0\u1edbc s\u1ef1 \u0111a d\u1ea1ng c\u1ee7a c\u00e1c nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 CDN tr\u00ean th\u1ecb tr\u01b0\u1eddng, doanh nghi\u1ec7p c\u1ea7n \u0111\u01b0a ra quy\u1ebft \u0111\u1ecbnh s\u00e1ng su\u1ed1t d\u1ef1a tr\u00ean \u0111\u1eb7c \u0111i\u1ec3m kinh doanh c\u1ee7a m\u00ecnh v\u00e0 tu\u00e2n th\u1ee7 c\u00e1c ph\u01b0\u01a1ng ph\u00e1p t\u1ed1t nh\u1ea5t \u0111\u1ec3 tri\u1ec3n khai d\u1ecbch v\u1ee5 n\u00e0y.<\/p>\n\n\n\n

Evaluating business requirements and performance indicators<\/h3>\n\n\n\n

Tr\u01b0\u1edbc h\u1ebft, c\u1ea7n x\u00e1c \u0111\u1ecbnh r\u00f5 nhu c\u1ea7u c\u1ed1t l\u00f5i: l\u00e0 t\u1eadp trung v\u00e0o t\u0103ng t\u1ed1c \u0111\u1ed9 truy c\u1eadp c\u00e1c t\u00e0i nguy\u00ean t\u0129nh, t\u0103ng t\u1ed1c \u0111\u1ed9 truy c\u1eadp n\u1ed9i dung \u0111\u1ed9ng, ph\u00e2n ph\u1ed1i video qua d\u1ecbch v\u1ee5 truy\u1ec1n ph\u00e1t tr\u1ef1c tuy\u1ebfn, hay b\u1ea3o v\u1ec7 an ninh? Y\u00eau c\u1ea7u ph\u1ee7 s\u00f3ng cao h\u01a1n \u0111\u1ed1i v\u1edbi nh\u1eefng khu v\u1ef1c n\u00e0o tr\u00ean to\u00e0n c\u1ea7u? M\u1ee5c ti\u00eau n\u00e2ng cao hi\u1ec7u su\u1ea5t mong \u0111\u1ee3i l\u00e0 g\u00ec? V\u00ed d\u1ee5, c\u00e1c trang web video c\u00f3 y\u00eau c\u1ea7u r\u1ea5t cao v\u1ec1 b\u0103ng th\u00f4ng v\u00e0 \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh, trong khi c\u00e1c trang web th\u01b0\u01a1ng m\u1ea1i \u0111i\u1ec7n t\u1eed l\u1ea1i quan t\u00e2m nhi\u1ec1u h\u01a1n \u0111\u1ebfn vi\u1ec7c t\u0103ng t\u1ed1c \u0111\u1ed9 truy c\u1eadp c\u00e1c API \u0111\u1ed9ng.<\/p>\n\n\n\n

C\u00e1c ch\u1ec9 s\u1ed1 hi\u1ec7u su\u1ea5t ch\u00ednh bao g\u1ed3m: s\u1ed1 l\u01b0\u1ee3ng v\u00e0 ph\u00e2n b\u1ed1 c\u00e1c n\u00fat, t\u1ef7 l\u1ec7 truy c\u1eadp v\u00e0o b\u1ed9 \u0111\u1ec7m (cache hit rate), th\u1eddi gian ph\u1ea3n h\u1ed3i, m\u1ee9c \u0111\u1ed9 s\u1eb5n s\u00e0ng ho\u1ea1t \u0111\u1ed9ng (availability), v\u00e0 chi ph\u00ed b\u0103ng th\u00f4ng khi truy c\u1eadp ngu\u1ed3n d\u1eef li\u1ec7u t\u1eeb b\u00ean ngo\u00e0i (backhaul bandwidth cost). B\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00e1c g\u00f3i d\u1ecbch v\u1ee5 th\u1eed nghi\u1ec7m v\u00e0 c\u00e1c b\u00e0i ki\u1ec3m th\u1eed chu\u1ea9n (<\/p>\n\n\n\n

T\u1ed1i \u01b0u h\u00f3a c\u1ea5u h\u00ecnh v\u00e0 chi\u1ebfn l\u01b0\u1ee3c b\u1ed9 nh\u1edb \u0111\u1ec7m<\/h3>\n\n\n\n

Vi\u1ec7c tri\u1ec3n khai CDN kh\u00f4ng \u0111\u01a1n gi\u1ea3n ch\u1ec9 l\u00e0 k\u1ebft n\u1ed1i n\u00f3 v\u00e0o h\u1ec7 th\u1ed1ng l\u00e0 xong; vi\u1ec7c c\u1ea5u h\u00ecnh m\u1ed9t c\u00e1ch chi ti\u1ebft m\u1edbi l\u00e0 ch\u00eca kh\u00f3a \u0111\u1ec3 t\u1eadn d\u1ee5ng t\u1ed1i \u0111a hi\u1ec7u qu\u1ea3 c\u1ee7a n\u00f3. Th\u1eddi gian l\u01b0u tr\u1eef trong b\u1ed9 \u0111\u1ec7m (cache) c\u1ea7n \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp ph\u00f9 h\u1ee3p t\u00f9y theo lo\u1ea1i n\u1ed9i dung: \u0111\u1ed1i v\u1edbi c\u00e1c bi\u1ec3u t\u01b0\u1ee3ng (logo) ho\u1eb7c h\u00ecnh \u1ea3nh kh\u00f4ng thay \u0111\u1ed5i th\u01b0\u1eddng xuy\u00ean, c\u00f3 th\u1ec3 thi\u1ebft l\u1eadp th\u1eddi gian l\u01b0u tr\u1eef l\u00ean \u0111\u1ebfn v\u00e0i th\u00e1ng; c\u00f2n \u0111\u1ed1i v\u1edbi c\u00e1c trang tin t\u1ee9c th\u01b0\u1eddng xuy\u00ean \u0111\u01b0\u1ee3c c\u1eadp nh\u1eadt, th\u1eddi gian l\u01b0u tr\u1eef c\u00f3 th\u1ec3 ch\u1ec9 t\u1eeb v\u00e0i ph\u00fat \u0111\u1ebfn v\u00e0i gi\u1edd.<\/p>\n\n\n\n

Ngo\u00e0i ra, c\u1ea7n ph\u1ea3i c\u1ea5u h\u00ecnh c\u00e1c kh\u00f3a l\u01b0u tr\u1eef (cache keys) m\u1ed9t c\u00e1ch h\u1ee3p l\u00fd \u0111\u1ec3 ph\u00e2n bi\u1ec7t c\u00e1c URL c\u00f3 c\u00e1c tham s\u1ed1 truy v\u1ea5n kh\u00e1c nhau. Vi\u1ec7c k\u00edch ho\u1ea1t c\u00e1c c\u00f4ng ngh\u1ec7 n\u00e9n nh\u01b0 Gzip ho\u1eb7c Brotli, c\u0169ng nh\u01b0 t\u1ed1i \u01b0u h\u00f3a \u0111\u1ecbnh d\u1ea1ng h\u00ecnh \u1ea3nh, c\u0169ng c\u00f3 th\u1ec3 gi\u00fap c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t th\u00eam n\u1eefa \u1edf t\u1ea7ng CDN (Content Delivery Network).<\/p>\n\n\n\n

Gi\u00e1m s\u00e1t, Ph\u00e2n t\u00edch v\u00e0 T\u1ed1i \u01b0u h\u00f3a Li\u00ean t\u1ee5c<\/h3>\n\n\n\n

Sau khi tri\u1ec3n khai, c\u1ea7n thi\u1ebft ph\u1ea3i thi\u1ebft l\u1eadp m\u1ed9t h\u1ec7 th\u1ed1ng gi\u00e1m s\u00e1t ho\u00e0n ch\u1ec9nh. H\u00e3y s\u1eed d\u1ee5ng c\u00e1c c\u00f4ng c\u1ee5 gi\u00e1m s\u00e1t th\u1eddi gian th\u1ef1c v\u00e0 b\u00e1o c\u00e1o ph\u00e2n t\u00edch do nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 CDN cung c\u1ea5p \u0111\u1ec3 theo d\u00f5i s\u00e1t sao c\u00e1c ch\u1ec9 s\u1ed1 quan tr\u1ecdng nh\u01b0 s\u1ef1 thay \u0111\u1ed5i l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp, t\u1ef7 l\u1ec7 truy c\u1eadp th\u00e0nh c\u00f4ng, m\u1ee9c ti\u00eau th\u1ee5 b\u0103ng th\u00f4ng v\u00e0 t\u1ef7 l\u1ec7 l\u1ed7i.<\/p>\n\n\n\n

B\u1eb1ng c\u00e1ch ph\u00e2n t\u00edch nh\u1eadt k\u00fd truy c\u1eadp c\u1ee7a ng\u01b0\u1eddi d\u00f9ng, ch\u00fang ta c\u00f3 th\u1ec3 bi\u1ebft \u0111\u01b0\u1ee3c s\u1ef1 ph\u00e2n b\u1ed1 c\u1ee7a c\u00e1c n\u1ed9i dung ph\u1ed5 bi\u1ebfn v\u00e0 ngu\u1ed3n \u0111\u1ecba l\u00fd c\u1ee7a h\u1ecd. T\u1eeb \u0111\u00f3, ch\u00fang ta c\u00f3 th\u1ec3 \u0111i\u1ec1u ch\u1ec9nh c\u1ea5u h\u00ecnh CDN (Content Delivery Network) \u2013 v\u00ed d\u1ee5 nh\u01b0 t\u1ea3i s\u1eb5n c\u00e1c t\u00e0i nguy\u00ean ph\u1ed5 bi\u1ebfn l\u00ean c\u00e1c node c\u1ee5 th\u1ec3, ho\u1eb7c t\u0103ng c\u01b0\u1eddng ngu\u1ed3n l\u1ef1c t\u1ea1i c\u00e1c khu v\u1ef1c c\u00f3 l\u01b0\u1ee3ng truy c\u1eadp t\u0103ng v\u1ecdt \u2013 nh\u1eb1m \u0111\u1ea1t \u0111\u01b0\u1ee3c hi\u1ec7u su\u1ea5t t\u1ed1t h\u01a1n v\u00e0 ki\u1ec3m so\u00e1t chi ph\u00ed m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3.<\/p>\n\n\n\n

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

L\u00e0 m\u1ed9t ph\u1ea7n quan tr\u1ecdng c\u1ee7a c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng Internet, CDN (Content Delivery Network) \u0111\u00e3 chuy\u1ec3n m\u00ecnh t\u1eeb m\u1ed9t c\u00f4ng ngh\u1ec7 t\u00f9y ch\u1ecdn th\u00e0nh m\u1ed9t th\u00e0nh ph\u1ea7n thi\u1ebft y\u1ebfu \u0111\u1ed1i v\u1edbi c\u00e1c trang web v\u00e0 \u1ee9ng d\u1ee5ng tr\u1ef1c tuy\u1ebfn. Nh\u1edd v\u00e0o c\u00e1c c\u00f4ng ngh\u1ec7 c\u1ed1t l\u00f5i nh\u01b0 l\u01b0u tr\u1eef \u0111\u1ec7m ph\u00e2n t\u00e1n v\u00e0 \u0111i\u1ec1u ph\u1ed1i th\u00f4ng minh, CDN gi\u00fap ph\u00e2n ph\u1ed1i n\u1ed9i dung m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 theo c\u00e1ch phi t\u1eadp trung, t\u1eeb \u0111\u00f3 mang l\u1ea1i nh\u1eefng c\u1ea3i thi\u1ec7n \u0111\u00e1ng k\u1ec3 v\u1ec1 t\u1ed1c \u0111\u1ed9, chi ph\u00ed, \u0111\u1ed9 tin c\u1eady v\u00e0 b\u1ea3o m\u1eadt. V\u1edbi s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a c\u00e1c c\u00f4ng ngh\u1ec7 m\u1edbi nh\u01b0 \u0111i\u1ec7n to\u00e1n bi\u00ean (edge computing), vai tr\u00f2 c\u1ee7a CDN \u0111ang d\u1ea7n chuy\u1ec3n t\u1eeb m\u1ed9t h\u1ec7 th\u1ed1ng ch\u1ec9 d\u00f9ng \u0111\u1ec3 ph\u00e2n ph\u1ed1i n\u1ed9i dung sang m\u1ed9t n\u1ec1n t\u1ea3ng d\u1ecbch v\u1ee5 to\u00e0n di\u1ec7n t\u1ea1i c\u00e1c \u0111i\u1ec3m bi\u00ean (edge services). Trong t\u01b0\u01a1ng lai, CDN ch\u1eafc ch\u1eafn s\u1ebd m\u1edf ra nhi\u1ec1u kh\u1ea3 n\u0103ng m\u1edbi cho tr\u1ea3i nghi\u1ec7m k\u1ef9 thu\u1eadt s\u1ed1.<\/p>\n\n\n\n

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

CDN (Content Delivery Network) l\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 t\u0103ng t\u1ed1c \u0111\u1ed9 truy c\u1eadp c\u00e1c n\u1ed9i dung \u0111\u1ed9ng (dynamic content)?<\/h3>\n\n\n\n

Truy\u1ec1n th\u1ed1ng, c\u00e1c h\u1ec7 th\u1ed1ng CDN (Content Delivery Network) ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 t\u1ed1i \u01b0u h\u00f3a n\u1ed9i dung t\u0129nh. Tuy nhi\u00ean, \u0111\u1ed1i v\u1edbi n\u1ed9i dung \u0111\u1ed9ng, c\u00e1c c\u00f4ng ngh\u1ec7 CDN hi\u1ec7n \u0111\u1ea1i c\u0169ng cung c\u1ea5p nhi\u1ec1u gi\u1ea3i ph\u00e1p t\u1ed1i \u01b0u h\u00f3a. V\u00ed d\u1ee5, b\u1eb1ng c\u00e1ch t\u1ed1i \u01b0u h\u00f3a \u0111\u01b0\u1eddng d\u1eabn truy c\u1eadp ngu\u1ed3n (backhaul routing) \u0111\u1ec3 ch\u1ecdn nh\u1eefng tuy\u1ebfn \u0111\u01b0\u1eddng m\u1ea1ng nhanh h\u01a1n v\u00e0 \u1ed5n \u0111\u1ecbnh h\u01a1n \u0111\u1ec3 k\u1ebft n\u1ed1i v\u1edbi m\u00e1y ch\u1ee7 ngu\u1ed3n; s\u1eed d\u1ee5ng c\u00e1c c\u00f4ng ngh\u1ec7 nh\u01b0 t\u1ed1i \u01b0u h\u00f3a TCP v\u00e0 truy\u1ec1n l\u1ea1i d\u1eef li\u1ec7u nhanh (fast retransmission) \u0111\u1ec3 gi\u1ea3m \u0111\u1ed9 tr\u1ec5 truy\u1ec1n t\u1ea3i; th\u1eadm ch\u00ed l\u00e0 chuy\u1ec3n m\u1ed9t s\u1ed1 ph\u1ea7n t\u00ednh to\u00e1n logic xu\u1ed1ng c\u00e1c node \u1edf periphery (c\u00e1c \u0111i\u1ec3m g\u1ea7n ng\u01b0\u1eddi d\u00f9ng), gi\u00fap x\u1eed l\u00fd d\u1eef li\u1ec7u \u0111\u1ed9ng ngay t\u1ea1i \u0111\u00f3, t\u1eeb \u0111\u00f3 r\u00fat ng\u1eafn th\u1eddi gian ph\u1ea3n h\u1ed3i cho c\u00e1c y\u00eau c\u1ea7u<\/p>\n\n\n\n

Vi\u1ec7c s\u1eed d\u1ee5ng CDN (Content Delivery Network) c\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn vi\u1ec7c t\u1ed1i \u01b0u h\u00f3a trang web tr\u00ean c\u00e1c c\u00f4ng c\u1ee5 t\u00ecm ki\u1ebfm (SEO) kh\u00f4ng?<\/h3>\n\n\n\n

Vi\u1ec7c s\u1eed d\u1ee5ng CDN m\u1ed9t c\u00e1ch \u0111\u00fang \u0111\u1eafn kh\u00f4ng ch\u1ec9 kh\u00f4ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn qu\u00e1 tr\u00ecnh t\u1ed1i \u01b0u h\u00f3a trang web tr\u00ean c\u00e1c c\u00f4ng c\u1ee5 t\u00ecm ki\u1ebfm, m\u00e0 ng\u01b0\u1ee3c l\u1ea1i c\u00f2n mang l\u1ea1i nhi\u1ec1u l\u1ee3i \u00edch \u0111\u00e1ng k\u1ec3. T\u1ed1c \u0111\u1ed9 t\u1ea3i trang l\u00e0 m\u1ed9t y\u1ebfu t\u1ed1 quan tr\u1ecdng trong vi\u1ec7c x\u1ebfp h\u1ea1ng trang web tr\u00ean c\u00e1c c\u00f4ng c\u1ee5 t\u00ecm ki\u1ebfm, v\u00e0 vi\u1ec7c t\u0103ng t\u1ed1c \u0111\u1ed9 t\u1ea3i trang nh\u1edd CDN s\u1ebd tr\u1ef1c ti\u1ebfp gi\u00fap c\u1ea3i thi\u1ec7n th\u1ee9 h\u1ea1ng c\u1ee7a trang web \u0111\u00f3. Ngo\u00e0i ra, t\u00ednh kh\u1ea3 d\u1ee5ng cao c\u1ee7a CDN c\u0169ng \u0111\u1ea3m b\u1ea3o r\u1eb1ng trang web lu\u00f4n c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c truy c\u1eadp \u0111\u01b0\u1ee3c khi c\u00e1c c\u00f4ng c\u1ee5 t\u00ecm ki\u1ebfm thu th\u1eadp d<\/p>\n\n\n\n

C\u1ea7n l\u01b0u \u00fd r\u1eb1ng b\u1ea1n ph\u1ea3i \u0111\u1ea3m b\u1ea3o r\u1eb1ng nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 CDN (Content Delivery Network) cho ph\u00e9p 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 crawlers) truy c\u1eadp v\u00e0o trang web m\u1ed9t c\u00e1ch b\u00ecnh th\u01b0\u1eddng. \u0110\u1ed3ng th\u1eddi, \u0111\u1ecba ch\u1ec9 IP g\u1ed1c c\u1ee7a trang web c\u0169ng c\u1ea7n \u0111\u01b0\u1ee3c x\u00e1c th\u1ef1c v\u00e0 c\u1ea5u h\u00ecnh \u0111\u00fang c\u00e1ch trong c\u00e1c c\u00f4ng c\u1ee5 t\u00ecm ki\u1ebfm, nh\u1eb1m tr\u00e1nh t\u00ecnh tr\u1ea1ng trang web<\/p>\n\n\n\n

D\u1ecbch v\u1ee5 CDN th\u01b0\u1eddng t\u00ednh ph\u00ed nh\u01b0 th\u1ebf n\u00e0o?<\/h3>\n\n\n\n

M\u00f4 h\u00ecnh t\u00ednh ph\u00ed c\u1ee7a CDN ch\u1ee7 y\u1ebfu d\u1ef1a tr\u00ean l\u01b0\u1ee3ng t\u00e0i nguy\u00ean \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng. C\u00e1ch t\u00ednh ph\u00ed ph\u1ed5 bi\u1ebfn nh\u1ea5t l\u00e0 d\u1ef1a tr\u00ean l\u01b0\u1ee3ng d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c truy\u1ec1n xu\u1ed1ng (downstream traffic), t\u1ee9c l\u00e0 t\u1ed5ng l\u01b0\u1ee3ng d\u1eef li\u1ec7u t\u1eeb c\u00e1c n\u00fat bi\u00ean c\u1ee7a CDN chuy\u1ec3n \u0111\u1ebfn ng\u01b0\u1eddi d\u00f9ng. Ngo\u00e0i ra, c\u0169ng c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng c\u00e1c ph\u01b0\u01a1ng th\u1ee9c t\u00ednh ph\u00ed kh\u00e1c d\u1ef1a tr\u00ean s\u1ed1 l\u01b0\u1ee3ng y\u00eau c\u1ea7u HTTP\/HTTPS, l\u01b0\u1ee3ng kh\u00f4ng gian l\u01b0u tr\u1eef \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng, ho\u1eb7c l\u01b0\u1ee3ng d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c truy\u1ec1n ng\u01b0\u1ee3c v\u1ec1 m\u00e1y ch\u1ee7 ngu\u1ed3n (origin traffic).<\/p>\n\n\n\n

Nhi\u1ec1u nh\u00e0 cung c\u1ea5p c\u0169ng \u00e1p d\u1ee5ng m\u00f4 h\u00ecnh t\u00ednh ph\u00ed d\u1ef1a tr\u00ean m\u1ee9c \u0111\u1ed9 s\u1eed d\u1ee5ng b\u0103ng th\u00f4ng t\u1ed1i \u0111a (bandwidth peak billing). Ng\u01b0\u1eddi d\u00f9ng n\u00ean l\u1ef1a ch\u1ecdn ph\u01b0\u01a1ng th\u1ee9c t\u00ednh ph\u00ed ph\u00f9 h\u1ee3p nh\u1ea5t v\u1edbi m\u00f4 h\u00ecnh l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp c\u1ee7a doanh nghi\u1ec7p m\u00ecnh. Th\u00f4ng th\u01b0\u1eddng, vi\u1ec7c k\u00fd k\u1ebft h\u1ee3p \u0111\u1ed3ng d\u00e0i h\u1ea1n ho\u1eb7c thanh to\u00e1n tr\u01b0\u1edbc s\u1ebd gi\u00fap b\u1ea1n nh<\/p>\n\n\n\n

Li\u1ec7u t\u1ea5t c\u1ea3 c\u00e1c lo\u1ea1i trang web \u0111\u1ec1u c\u1ea7n s\u1eed d\u1ee5ng CDN (Content Delivery Network) kh\u00f4ng?<\/h3>\n\n\n\n

Kh\u00f4ng ph\u1ea3i t\u1ea5t c\u1ea3 c\u00e1c trang web \u0111\u1ec1u \u201cb\u1eaft bu\u1ed9c\u201d ph\u1ea3i s\u1eed d\u1ee5ng CDN, nh\u01b0ng \u0111\u1ed1i v\u1edbi \u0111\u1ea1i \u0111a s\u1ed1 c\u00e1c trang web h\u01b0\u1edbng t\u1edbi c\u00f4ng ch\u00fang, CDN \u0111\u1ec1u mang l\u1ea1i nhi\u1ec1u l\u1ee3i \u00edch t\u00edch c\u1ef1c. \u0110\u1ed1i v\u1edbi nh\u1eefng blog c\u00e1 nh\u00e2n nh\u1ecf ho\u1eb7c h\u1ec7 th\u1ed1ng qu\u1ea3n l\u00fd n\u1ed9i b\u1ed9, n\u1ebfu nh\u00f3m ng\u01b0\u1eddi d\u00f9ng t\u1eadp trung v\u00e0 l\u01b0\u1ee3ng truy c\u1eadp th\u1ea5p, th\u00ec vi\u1ec7c s\u1eed d\u1ee5ng CDN c\u00f3 th\u1ec3 kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t nhu c\u1ea7u c\u1ea5p b\u00e1ch.<\/p>\n\n\n\n

Tuy nhi\u00ean, \u0111\u1ed1i v\u1edbi nh\u1eefng trang web c\u00f3 ng\u01b0\u1eddi d\u00f9ng tr\u00ean to\u00e0n c\u1ea7u, n\u1ed9i dung ch\u1ee7 y\u1ebfu d\u01b0\u1edbi d\u1ea1ng t\u00e0i nguy\u00ean t\u0129nh, ho\u1eb7c th\u01b0\u1eddng xuy\u00ean g\u1eb7p ph\u1ea3i s\u1ef1 bi\u1ebfn \u0111\u1ed9ng v\u1ec1 l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp, l\u1ee3i \u00edch c\u1ee7a CDN (Content Delivery Network) l\u00e0 r\u1ea5t r\u00f5 r\u1ec7t. Ngay c\u1ea3 \u0111\u1ed1i v\u1edbi nh\u1eefng trang web nh\u1ecf, vi\u1ec7c s\u1eed d\u1ee5ng CDN c\u0169ng c\u00f3 th\u1ec3 n\u00e2ng cao \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh khi truy c\u1eadp v\u00e0 gi\u00fap ti\u1ebft ki\u1ec7m chi ph\u00ed b\u0103ng th\u00f4ng cho m\u00e1y ch\u1ee7 ngu\u1ed3n.<\/p>\n\n\n\n

Sau khi b\u1eadt ch\u1ee9c n\u0103ng CDN (Content Delivery Network), l\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 t\u00f4i bi\u1ebft r\u1eb1ng n\u1ed9i dung \u0111\u00e3 \u0111\u01b0\u1ee3c c\u1eadp nh\u1eadt?<\/h3>\n\n\n\n

Khi c\u00e1c n\u00fat bi\u00ean l\u01b0u tr\u1eef n\u1ed9i dung \u0111\u00e3 h\u1ebft h\u1ea1n, ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 kh\u00f4ng th\u1ec3 xem \u0111\u01b0\u1ee3c nh\u1eefng c\u1eadp nh\u1eadt m\u1edbi nh\u1ea5t t\u1eeb trang web g\u1ed1c ngay l\u1eadp t\u1ee9c. C\u00f3 m\u1ed9t s\u1ed1 c\u00e1ch \u0111\u1ec3 kh\u1eafc ph\u1ee5c v\u1ea5n \u0111\u1ec1 n\u00e0y: Th\u1ee9 nh\u1ea5t, khi c\u1eadp nh\u1eadt t\u1ec7p tr\u00ean trang web g\u1ed1c, b\u1ea1n c\u00f3 th\u1ec3 thay \u0111\u1ed5i t\u00ean t\u1ec7p ho\u1eb7c th\u00eam m\u1ed9t chu\u1ed7i truy v\u1ea5n (query string) \u0111\u1ec3 bu\u1ed9c ng\u01b0\u1eddi d\u00f9ng y\u00eau c\u1ea7u m\u1ed9t URL m\u1edbi. Th\u1ee9 hai, b\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng giao di\u1ec7n \u0111i\u1ec1u khi\u1ec3n c\u1ee7a nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 CDN \u0111\u1ec3 th\u1ef1c hi\u1ec7n thao t\u00e1c \u201ct\u00e1i t\u1ea1o b\u1ed9 \u0111\u1ec7m\u201d (cache refresh) cho m\u1ed9t URL ho\u1eb7c th\u01b0 m\u1ee5c c\u1ee5 th\u1ec3, nh\u1eb1m x\u00f3a b\u1ed9 \u0111\u1ec7m c\u0169 \u0111i ngay l\u1eadp t\u1ee9c.<\/p>\n\n\n\n

Cu\u1ed1i c\u00f9ng, b\u1ea1n c\u00f3 th\u1ec3 thi\u1ebft l\u1eadp th\u1eddi gian l\u01b0u tr\u1eef trong b\u1ed9 \u0111\u1ec7m (cache) ng\u1eafn h\u01a1n, nh\u01b0ng \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m t\u1ef7 l\u1ec7 truy c\u1eadp v\u00e0o d\u1eef li\u1ec7u \u0111\u00e3 \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef trong b\u1ed9 \u0111\u1ec7m (cache hit rate). Th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t l\u00e0 x\u00e1c \u0111\u1ecbnh chi\u1ebfn l\u01b0\u1ee3c l\u01b0u tr\u1eef trong b\u1ed9 \u0111\u1ec7m ph\u00f9 h\u1ee3p d\u1ef1a tr\u00ean lo\u1ea1i n\u1ed9i dung, v\u00e0 s\u1eed d\u1ee5ng ch\u1ee9c n\u0103ng l\u00e0m m\u1edbi (refresh) cho nh<\/p>","protected":false},"excerpt":{"rendered":"

B\u00e0i vi\u1ebft tr\u00ecnh b\u00e0y chi ti\u1ebft v\u1ec1 nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ed1t l\u00f5i v\u00e0 c\u00e1c th\u00e0nh ph\u1ea7n k\u1ef9 thu\u1eadt c\u1ee7a CDN (Content Delivery Network \u2013 M\u1ea1ng Ph\u00e2n ph\u1ed1i N\u1ed9i dung). CDN ho\u1ea1t \u0111\u1ed9ng b\u1eb1ng c\u00e1ch tri\u1ec3n khai c\u00e1c n\u00fat \u0111\u1ea7u cu\u1ed1i (edge nodes) tr\u00ean to\u00e0n th\u1ebf gi\u1edbi \u0111\u1ec3 l\u01b0u tr\u1eef n\u1ed9i dung, k\u1ebft h\u1ee3p v\u1edbi h\u1ec7 th\u1ed1ng \u0111i\u1ec1u ph\u1ed1i th\u00f4ng minh \u0111\u1ec3 \u0111\u1ecbnh h\u01b0\u1edbng c\u00e1c y\u00eau c\u1ea7u t\u1eeb ng\u01b0\u1eddi d\u00f9ng \u0111\u1ebfn n\u00fat ph\u00f9 h\u1ee3p nh\u1ea5t. Nh\u1edd \u0111\u00f3, th\u1eddi gian tr\u1ec5 \u0111\u01b0\u1ee3c gi\u1ea3m \u0111\u00e1ng k\u1ec3, t\u1ea3i tr\u00ean m\u00e1y ch\u1ee7 ngu\u1ed3n \u0111\u01b0\u1ee3c gi\u1ea3m b\u1edbt, v\u00e0 t\u1ed1c \u0111\u1ed9 truy c\u1eadp c\u0169ng nh\u01b0 t\u00ednh kh\u1ea3 d\u1ee5ng<\/p>","protected":false},"author":7,"featured_media":0,"template":"","meta":{"_acf_changed":false,"footnotes":""},"tags":[],"knowledge_category":[278],"class_list":["post-12377815","knowledge_post","type-knowledge_post","status-publish","hentry","knowledge_category-cdn"],"acf":{"site_seo_keywords":"CDN\u6280\u672f,\u5185\u5bb9\u5206\u53d1\u7f51\u7edc,\u7f51\u7ad9\u52a0\u901f,\u7528\u6237\u4f53\u9a8c,\u7f13\u5b58\u670d\u52a1\u5668,\u667a\u80fd\u8c03\u5ea6,\u5168\u7403\u8d1f\u8f7d\u5747\u8861,CDN\u6838\u5fc3\u539f\u7406"},"_links":{"self":[{"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/knowledge_posts\/12377815","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\/12377815\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/media?parent=12377815"}],"wp:term":[{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/tags?post=12377815"},{"taxonomy":"knowledge_category","embeddable":true,"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/knowledge_category?post=12377815"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}