{"id":476153,"date":"2023-08-09T07:26:52","date_gmt":"2023-08-09T07:26:52","guid":{"rendered":""},"modified":"2023-09-05T11:12:09","modified_gmt":"2023-09-05T11:12:09","slug":"cache-hit","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/vn\/wiki\/cache-hit\/","title":{"rendered":"L\u01b0\u1ee3t truy c\u1eadp b\u1ed9 \u0111\u1ec7m"},"content":{"rendered":"

L\u01b0\u1ee3t truy c\u1eadp b\u1ed9 \u0111\u1ec7m l\u00e0 m\u1ed9t kh\u00e1i ni\u1ec7m quan tr\u1ecdng trong l\u0129nh v\u1ef1c m\u00e1y ch\u1ee7 web v\u00e0 m\u00e1y ch\u1ee7 proxy, \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t trang web. N\u00f3 \u0111\u1ec1 c\u1eadp \u0111\u1ebfn vi\u1ec7c truy xu\u1ea5t th\u00e0nh c\u00f4ng t\u00e0i nguy\u00ean \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u t\u1eeb b\u1ed9 nh\u1edb \u0111\u1ec7m, thay v\u00ec t\u00ecm n\u1ea1p n\u00f3 t\u1eeb m\u00e1y ch\u1ee7 g\u1ed1c. Vi\u1ec7c s\u1eed d\u1ee5ng b\u1ed9 nh\u1edb \u0111\u1ec7m c\u00f3 th\u1ec3 gi\u1ea3m \u0111\u00e1ng k\u1ec3 th\u1eddi gian ph\u1ea3n h\u1ed3i v\u00e0 t\u1ea3i c\u1ee7a m\u00e1y ch\u1ee7, gi\u00fap c\u1ea3i thi\u1ec7n tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng v\u00e0 hi\u1ec7u qu\u1ea3 t\u1ed5ng th\u1ec3.<\/p>\n

L\u1ecbch s\u1eed ngu\u1ed3n g\u1ed1c c\u00fa hit Cache v\u00e0 l\u1ea7n \u0111\u1ea7u ti\u00ean nh\u1eafc t\u1edbi n\u00f3<\/h2>\n

Kh\u00e1i ni\u1ec7m v\u1ec1 b\u1ed9 nh\u1edb \u0111\u1ec7m c\u00f3 th\u1ec3 b\u1eaft ngu\u1ed3n t\u1eeb nh\u1eefng ng\u00e0y \u0111\u1ea7u c\u1ee7a m\u00e1y t\u00ednh khi h\u1ec7 th\u1ed1ng m\u00e1y t\u00ednh \u0111\u1ea7u ti\u00ean \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 l\u01b0u tr\u1eef d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c truy c\u1eadp th\u01b0\u1eddng xuy\u00ean \u1edf m\u1ed9t v\u1ecb tr\u00ed b\u1ed9 nh\u1edb \u0111\u1eb7c bi\u1ec7t, nhanh h\u01a1n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 b\u1ed9 \u0111\u1ec7m. Thu\u1eadt ng\u1eef \u201ccache hit\u201d \u0111\u00e3 tr\u1edf n\u00ean n\u1ed5i b\u1eadt trong b\u1ed1i c\u1ea3nh m\u00e1y ch\u1ee7 web khi \u0111\u1ed9 ph\u1ee9c t\u1ea1p c\u1ee7a Internet v\u00e0 trang web ph\u00e1t tri\u1ec3n v\u00e0o cu\u1ed1i th\u1ebf k\u1ef7 20. C\u00e1c m\u00e1y ch\u1ee7 v\u00e0 tr\u00ecnh duy\u1ec7t web ban \u0111\u1ea7u b\u1eaft \u0111\u1ea7u s\u1eed d\u1ee5ng b\u1ed9 \u0111\u1ec7m \u0111\u1ec3 l\u01b0u tr\u1eef c\u00e1c t\u00e0i nguy\u00ean web \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u th\u01b0\u1eddng xuy\u00ean, ch\u1eb3ng h\u1ea1n nh\u01b0 h\u00ecnh \u1ea3nh, t\u1ec7p CSS v\u00e0 t\u1eadp l\u1ec7nh, nh\u1eb1m t\u0103ng t\u1ed1c th\u1eddi gian t\u1ea3i trang.<\/p>\n

Th\u00f4ng tin chi ti\u1ebft v\u1ec1 l\u1ea7n truy c\u1eadp Cache. M\u1edf r\u1ed9ng ch\u1ee7 \u0111\u1ec1 Cache hit.<\/h2>\n

L\u1ea7n truy c\u1eadp b\u1ed9 \u0111\u1ec7m l\u00e0 m\u1ed9t ph\u1ea7n kh\u00f4ng th\u1ec3 thi\u1ebfu trong c\u01a1 ch\u1ebf b\u1ed9 nh\u1edb \u0111\u1ec7m \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng b\u1edfi c\u00e1c m\u00e1y ch\u1ee7 web v\u00e0 m\u00e1y ch\u1ee7 proxy hi\u1ec7n \u0111\u1ea1i. Khi ng\u01b0\u1eddi d\u00f9ng ho\u1eb7c thi\u1ebft b\u1ecb kh\u00e1ch y\u00eau c\u1ea7u m\u1ed9t t\u00e0i nguy\u00ean, ch\u1eb3ng h\u1ea1n nh\u01b0 m\u1ed9t trang web, t\u1eeb m\u1ed9t trang web \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef tr\u00ean m\u00e1y ch\u1ee7, tr\u01b0\u1edbc ti\u00ean, m\u00e1y ch\u1ee7 s\u1ebd ki\u1ec3m tra b\u1ed9 nh\u1edb \u0111\u1ec7m c\u1ee7a n\u00f3 \u0111\u1ec3 bi\u1ebft s\u1ef1 hi\u1ec7n di\u1ec7n c\u1ee7a t\u00e0i nguy\u00ean \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u. N\u1ebfu t\u00e0i nguy\u00ean \u0111\u01b0\u1ee3c t\u00ecm th\u1ea5y trong b\u1ed9 \u0111\u1ec7m, \u0111i\u1ec1u \u0111\u00f3 s\u1ebd d\u1eabn \u0111\u1ebfn l\u1ed7i b\u1ed9 \u0111\u1ec7m v\u00e0 m\u00e1y ch\u1ee7 c\u00f3 th\u1ec3 ph\u00e2n ph\u00e1t t\u00e0i nguy\u00ean ngay l\u1eadp t\u1ee9c cho m\u00e1y kh\u00e1ch m\u00e0 kh\u00f4ng c\u1ea7n truy c\u1eadp v\u00e0o m\u00e1y ch\u1ee7 g\u1ed1c.<\/p>\n

M\u1eb7t kh\u00e1c, n\u1ebfu t\u00e0i nguy\u00ean \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u kh\u00f4ng c\u00f3 trong b\u1ed9 nh\u1edb \u0111\u1ec7m, \u0111i\u1ec1u \u0111\u00f3 s\u1ebd d\u1eabn \u0111\u1ebfn thi\u1ebfu b\u1ed9 \u0111\u1ec7m v\u00e0 m\u00e1y ch\u1ee7 ph\u1ea3i t\u00ecm n\u1ea1p t\u00e0i nguy\u00ean t\u1eeb m\u00e1y ch\u1ee7 g\u1ed1c. Sau khi t\u00e0i nguy\u00ean \u0111\u01b0\u1ee3c truy xu\u1ea5t, t\u00e0i nguy\u00ean s\u1ebd \u0111\u01b0\u1ee3c l\u01b0u trong b\u1ed9 \u0111\u1ec7m cho c\u00e1c y\u00eau c\u1ea7u ti\u1ebfp theo, t\u1ed1i \u01b0u h\u00f3a th\u1eddi gian ph\u1ea3n h\u1ed3i trong t\u01b0\u01a1ng lai v\u00e0 gi\u1ea3m t\u1ea3i cho m\u00e1y ch\u1ee7 g\u1ed1c.<\/p>\n

C\u1ea5u tr\u00fac b\u00ean trong c\u1ee7a c\u00fa \u0111\u00e1nh Cache. C\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a c\u00fa \u0111\u00e1nh Cache.<\/h2>\n

C\u1ea5u tr\u00fac b\u00ean trong c\u1ee7a l\u1ea7n truy c\u1eadp b\u1ed9 \u0111\u1ec7m bao g\u1ed3m m\u1ed9t lo\u1ea1t c\u00e1c b\u01b0\u1edbc x\u00e1c \u0111\u1ecbnh xem t\u00e0i nguy\u00ean \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u c\u00f3 trong b\u1ed9 \u0111\u1ec7m hay kh\u00f4ng. C\u00e1c b\u01b0\u1edbc n\u00e0y th\u01b0\u1eddng bao g\u1ed3m:<\/p>\n

    \n
  1. \n

    B\u0103m<\/strong>: Khi c\u00f3 y\u00eau c\u1ea7u v\u1ec1 t\u00e0i nguy\u00ean, m\u00e1y ch\u1ee7 s\u1ebd t\u1ea1o m\u1ed9t m\u00e3 \u0111\u1ecbnh danh duy nh\u1ea5t (b\u0103m) d\u1ef1a tr\u00ean c\u00e1c tham s\u1ed1 y\u00eau c\u1ea7u. H\u00e0m b\u0103m n\u00e0y \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 tra c\u1ee9u nhanh t\u00e0i nguy\u00ean trong b\u1ed9 \u0111\u1ec7m.<\/p>\n<\/li>\n

  2. \n

    Tra c\u1ee9u b\u1ed9 \u0111\u1ec7m<\/strong>: M\u00e1y ch\u1ee7 ki\u1ec3m tra b\u1ed9 nh\u1edb \u0111\u1ec7m b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng h\u00e0m b\u0103m \u0111\u01b0\u1ee3c t\u1ea1o \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh xem t\u00e0i nguy\u00ean \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u c\u00f3 t\u1ed3n t\u1ea1i trong b\u1ed9 \u0111\u1ec7m hay kh\u00f4ng.<\/p>\n<\/li>\n

  3. \n

    B\u1ed9 nh\u1edb \u0111\u1ec7m truy c\u1eadp ho\u1eb7c b\u1ecf l\u1ee1<\/strong>: N\u1ebfu t\u00e0i nguy\u00ean \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u \u0111\u01b0\u1ee3c t\u00ecm th\u1ea5y trong b\u1ed9 \u0111\u1ec7m (l\u1ea7n truy c\u1eadp b\u1ed9 \u0111\u1ec7m), m\u00e1y ch\u1ee7 s\u1ebd l\u1ea5y t\u00e0i nguy\u00ean t\u1eeb b\u1ed9 nh\u1edb \u0111\u1ec7m v\u00e0 ph\u1ee5c v\u1ee5 n\u00f3 cho m\u00e1y kh\u00e1ch. N\u1ebfu kh\u00f4ng t\u00ecm th\u1ea5y t\u00e0i nguy\u00ean (l\u1ed7i b\u1ed9 nh\u1edb cache), m\u00e1y ch\u1ee7 s\u1ebd ti\u1ebfn h\u00e0nh t\u00ecm n\u1ea1p t\u00e0i nguy\u00ean t\u1eeb m\u00e1y ch\u1ee7 g\u1ed1c.<\/p>\n<\/li>\n

  4. \n

    Ch\u00ednh s\u00e1ch b\u1ed9 nh\u1edb \u0111\u1ec7m<\/strong>: C\u00e1c ch\u00ednh s\u00e1ch b\u1ed9 nh\u1edb \u0111\u1ec7m kh\u00e1c nhau s\u1ebd qu\u1ea3n l\u00fd kho\u1ea3ng th\u1eddi gian t\u00e0i nguy\u00ean t\u1ed3n t\u1ea1i trong b\u1ed9 nh\u1edb \u0111\u1ec7m tr\u01b0\u1edbc khi t\u00e0i nguy\u00ean \u0111\u00f3 b\u1ecb coi l\u00e0 c\u0169 v\u00e0 c\u1ea7n \u0111\u01b0\u1ee3c l\u00e0m m\u1edbi t\u1eeb m\u00e1y ch\u1ee7 g\u1ed1c. C\u00e1c ch\u00ednh s\u00e1ch b\u1ed9 \u0111\u1ec7m ph\u1ed5 bi\u1ebfn bao g\u1ed3m c\u00e1c ti\u00eau \u0111\u1ec1 Th\u1eddi gian t\u1ed3n t\u1ea1i (TTL) v\u00e0 Ki\u1ec3m so\u00e1t b\u1ed9 \u0111\u1ec7m.<\/p>\n<\/li>\n<\/ol>\n

    Ph\u00e2n t\u00edch c\u00e1c t\u00ednh n\u0103ng ch\u00ednh c\u1ee7a Cache hit.<\/h2>\n

    C\u00e1c t\u00ednh n\u0103ng v\u00e0 \u01b0u \u0111i\u1ec3m ch\u00ednh c\u1ee7a cache hit l\u00e0:<\/p>\n

      \n
    1. \n

      Gi\u1ea3m \u0111\u1ed9 tr\u1ec5<\/strong>: L\u01b0\u1ee3t truy c\u1eadp b\u1ed9 \u0111\u1ec7m l\u00e0m gi\u1ea3m \u0111\u00e1ng k\u1ec3 \u0111\u1ed9 tr\u1ec5 v\u00e0 th\u1eddi gian ph\u1ea3n h\u1ed3i cho c\u00e1c t\u00e0i nguy\u00ean \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u v\u00ec ch\u00fang \u0111\u01b0\u1ee3c cung c\u1ea5p tr\u1ef1c ti\u1ebfp t\u1eeb b\u1ed9 nh\u1edb \u0111\u1ec7m, lo\u1ea1i b\u1ecf nhu c\u1ea7u t\u00ecm n\u1ea1p ch\u00fang t\u1eeb m\u00e1y ch\u1ee7 g\u1ed1c.<\/p>\n<\/li>\n

    2. \n

      B\u1ea3o t\u1ed3n b\u0103ng th\u00f4ng<\/strong>: B\u1ed9 nh\u1edb \u0111\u1ec7m ti\u1ebft ki\u1ec7m b\u0103ng th\u00f4ng v\u00ec t\u00e0i nguy\u00ean \u0111\u01b0\u1ee3c l\u01b0u trong b\u1ed9 nh\u1edb \u0111\u1ec7m c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ph\u00e2n ph\u1ed1i t\u1edbi m\u00e1y kh\u00e1ch m\u00e0 kh\u00f4ng ti\u00eau t\u1ed1n th\u00eam d\u1eef li\u1ec7u truy\u1ec1n t\u1eeb m\u00e1y ch\u1ee7 g\u1ed1c.<\/p>\n<\/li>\n

    3. \n

      T\u1ea3i m\u00e1y ch\u1ee7 th\u1ea5p h\u01a1n<\/strong>: B\u1eb1ng c\u00e1ch cung c\u1ea5p c\u00e1c t\u00e0i nguy\u00ean \u0111\u01b0\u1ee3c l\u01b0u trong b\u1ed9 nh\u1edb \u0111\u1ec7m, t\u1ea3i tr\u00ean m\u00e1y ch\u1ee7 g\u1ed1c s\u1ebd gi\u1ea3m xu\u1ed1ng, cho ph\u00e9p m\u00e1y ch\u1ee7 x\u1eed l\u00fd nhi\u1ec1u y\u00eau c\u1ea7u hi\u1ec7u qu\u1ea3 h\u01a1n.<\/p>\n<\/li>\n

    4. \n

      Tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng n\u00e2ng cao<\/strong>: Th\u1eddi gian t\u1ea3i nhanh h\u01a1n d\u1eabn \u0111\u1ebfn tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n, mang l\u1ea1i s\u1ef1 h\u00e0i l\u00f2ng v\u00e0 m\u1ee9c \u0111\u1ed9 t\u01b0\u01a1ng t\u00e1c c\u1ee7a ng\u01b0\u1eddi d\u00f9ng cao h\u01a1n.<\/p>\n<\/li>\n<\/ol>\n

      Vi\u1ebft nh\u1eefng lo\u1ea1i truy c\u1eadp Cache t\u1ed3n t\u1ea1i. S\u1eed d\u1ee5ng b\u1ea3ng v\u00e0 danh s\u00e1ch \u0111\u1ec3 vi\u1ebft.<\/h2>\n

      C\u00f3 m\u1ed9t s\u1ed1 lo\u1ea1i l\u1ea7n truy c\u1eadp b\u1ed9 \u0111\u1ec7m d\u1ef1a tr\u00ean m\u1ee9c \u0111\u1ed9 b\u1ed9 \u0111\u1ec7m v\u00e0 ph\u1ea1m vi t\u00e0i nguy\u00ean \u0111\u01b0\u1ee3c l\u01b0u trong b\u1ed9 \u0111\u1ec7m. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 c\u00e1c lo\u1ea1i ph\u1ed5 bi\u1ebfn:<\/p>\n

      D\u1ef1a tr\u00ean m\u1ee9c \u0111\u1ed9 b\u1ed9 nh\u1edb \u0111\u1ec7m:<\/h3>\n\n\n\n\n\n\n
      Ki\u1ec3u<\/th>\nS\u1ef1 mi\u00eau t\u1ea3<\/th>\n<\/tr>\n<\/thead>\n
      B\u1ed9 nh\u1edb \u0111\u1ec7m ph\u00eda m\u00e1y kh\u00e1ch<\/strong><\/td>\nTrong lo\u1ea1i n\u00e0y, b\u1ed9 \u0111\u1ec7m \u0111\u01b0\u1ee3c duy tr\u00ec \u1edf ph\u00eda m\u00e1y kh\u00e1ch, th\u01b0\u1eddng l\u00e0 trong tr\u00ecnh duy\u1ec7t web c\u1ee7a ng\u01b0\u1eddi d\u00f9ng. B\u1ed9 nh\u1edb \u0111\u1ec7m ph\u00eda m\u00e1y kh\u00e1ch r\u1ea5t h\u1eefu \u00edch cho vi\u1ec7c l\u01b0u v\u00e0o b\u1ed9 nh\u1edb \u0111\u1ec7m c\u00e1c t\u00e0i nguy\u00ean t\u0129nh nh\u01b0 t\u1ec7p CSS, JavaScript v\u00e0 h\u00ecnh \u1ea3nh. Khi ng\u01b0\u1eddi d\u00f9ng truy c\u1eadp l\u1ea1i m\u1ed9t trang web, tr\u00ecnh duy\u1ec7t s\u1ebd ki\u1ec3m tra b\u1ed9 \u0111\u1ec7m c\u1ee7a n\u00f3 tr\u01b0\u1edbc khi y\u00eau c\u1ea7u c\u00e1c t\u00e0i nguy\u00ean n\u00e0y t\u1eeb m\u00e1y ch\u1ee7. N\u1ebfu c\u00f3, l\u1ea7n truy c\u1eadp b\u1ed9 \u0111\u1ec7m s\u1ebd x\u1ea3y ra v\u00e0 t\u00e0i nguy\u00ean s\u1ebd \u0111\u01b0\u1ee3c t\u1ea3i t\u1eeb b\u1ed9 \u0111\u1ec7m c\u1ee5c b\u1ed9.<\/td>\n<\/tr>\n
      B\u1ed9 \u0111\u1ec7m ph\u00eda m\u00e1y ch\u1ee7<\/strong><\/td>\nB\u1ed9 nh\u1edb \u0111\u1ec7m ph\u00eda m\u00e1y ch\u1ee7 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n \u1edf c\u1ea5p \u0111\u1ed9 m\u00e1y ch\u1ee7 web. Khi c\u00f3 y\u00eau c\u1ea7u \u0111\u1ebfn, m\u00e1y ch\u1ee7 s\u1ebd ki\u1ec3m tra b\u1ed9 \u0111\u1ec7m c\u1ee7a n\u00f3 \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh xem t\u00e0i nguy\u00ean \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u c\u00f3 t\u1ed3n t\u1ea1i hay kh\u00f4ng. N\u1ebfu \u0111\u01b0\u1ee3c t\u00ecm th\u1ea5y, m\u1ed9t l\u1ea7n truy c\u1eadp b\u1ed9 nh\u1edb \u0111\u1ec7m s\u1ebd x\u1ea3y ra v\u00e0 t\u00e0i nguy\u00ean s\u1ebd \u0111\u01b0\u1ee3c cung c\u1ea5p t\u1eeb b\u1ed9 nh\u1edb \u0111\u1ec7m c\u1ee7a m\u00e1y ch\u1ee7. B\u1ed9 nh\u1edb \u0111\u1ec7m ph\u00eda m\u00e1y ch\u1ee7 ph\u00f9 h\u1ee3p v\u1edbi n\u1ed9i dung \u0111\u1ed9ng kh\u00f4ng thay \u0111\u1ed5i th\u01b0\u1eddng xuy\u00ean, nh\u01b0 c\u00e1c trang web \u0111\u01b0\u1ee3c hi\u1ec3n th\u1ecb ho\u1eb7c k\u1ebft qu\u1ea3 truy v\u1ea5n c\u01a1 s\u1edf d\u1eef li\u1ec7u.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      D\u1ef1a tr\u00ean ph\u1ea1m vi t\u00e0i nguy\u00ean \u0111\u01b0\u1ee3c l\u01b0u trong b\u1ed9 nh\u1edb \u0111\u1ec7m:<\/h3>\n\n\n\n\n\n\n
      Ki\u1ec3u<\/th>\nS\u1ef1 mi\u00eau t\u1ea3<\/th>\n<\/tr>\n<\/thead>\n
      B\u1ed9 \u0111\u1ec7m trang<\/strong><\/td>\nLo\u1ea1i b\u1ed9 \u0111\u1ec7m n\u00e0y l\u01b0u tr\u1eef to\u00e0n b\u1ed9 trang web v\u00e0 c\u00e1c t\u00e0i nguy\u00ean li\u00ean quan, bao g\u1ed3m c\u00e1c t\u1ec7p HTML, CSS, h\u00ecnh \u1ea3nh v\u00e0 JavaScript. B\u1ed9 nh\u1edb \u0111\u1ec7m trang c\u00f3 l\u1ee3i cho vi\u1ec7c gi\u1ea3m th\u1eddi gian x\u1eed l\u00fd c\u1ee7a m\u00e1y ch\u1ee7 v\u00e0 ph\u00e2n ph\u1ed1i n\u1ed9i dung \u0111\u01b0\u1ee3c hi\u1ec3n th\u1ecb tr\u01b0\u1edbc cho ng\u01b0\u1eddi d\u00f9ng, d\u1eabn \u0111\u1ebfn th\u1eddi gian t\u1ea3i trang nhanh h\u01a1n. B\u1ed9 \u0111\u1ec7m trang ho\u1ea1t \u0111\u1ed9ng hi\u1ec7u qu\u1ea3 \u0111\u1ed1i v\u1edbi n\u1ed9i dung t\u01b0\u01a1ng \u0111\u1ed1i t\u0129nh theo th\u1eddi gian.<\/td>\n<\/tr>\n
      B\u1ed9 \u0111\u1ec7m \u0111\u1ed1i t\u01b0\u1ee3ng<\/strong><\/td>\nB\u1ed9 nh\u1edb \u0111\u1ec7m \u0111\u1ed1i t\u01b0\u1ee3ng t\u1eadp trung v\u00e0o b\u1ed9 nh\u1edb \u0111\u1ec7m c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng ho\u1eb7c \u0111o\u1ea1n c\u1ee5 th\u1ec3 c\u1ee7a m\u1ed9t trang thay v\u00ec to\u00e0n b\u1ed9 trang. T\u00ednh n\u0103ng n\u00e0y r\u1ea5t h\u1eefu \u00edch khi m\u1ed9t s\u1ed1 ph\u1ea7n nh\u1ea5t \u0111\u1ecbnh c\u1ee7a trang web, ch\u1eb3ng h\u1ea1n nh\u01b0 c\u00e1c ti\u1ec7n \u00edch ho\u1eb7c ph\u1ea7n t\u1eed \u0111\u1ed9ng, c\u00f3 chi ph\u00ed t\u00ednh to\u00e1n cao \u0111\u1ec3 t\u1ea1o v\u00e0 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u1ea1i cho nhi\u1ec1u y\u00eau c\u1ea7u. B\u1ed9 nh\u1edb \u0111\u1ec7m \u0111\u1ed1i t\u01b0\u1ee3ng n\u00e2ng cao hi\u1ec7u su\u1ea5t trang web b\u1eb1ng c\u00e1ch ph\u1ee5c v\u1ee5 c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u01b0\u1ee3c t\u00ednh to\u00e1n tr\u01b0\u1edbc ho\u1eb7c k\u1ebft xu\u1ea5t tr\u01b0\u1edbc tr\u1ef1c ti\u1ebfp t\u1eeb b\u1ed9 \u0111\u1ec7m.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      C\u00e1c c\u00e1ch s\u1eed d\u1ee5ng Cache hit, c\u00e1c v\u1ea5n \u0111\u1ec1 v\u00e0 gi\u1ea3i ph\u00e1p li\u00ean quan \u0111\u1ebfn vi\u1ec7c s\u1eed d\u1ee5ng.<\/h2>\n

      \u0110\u1ec3 t\u1eadn d\u1ee5ng t\u1ed1i \u0111a l\u1ea7n truy c\u1eadp b\u1ed9 \u0111\u1ec7m v\u00e0 t\u1ed1i \u0111a h\u00f3a l\u1ee3i \u00edch c\u1ee7a n\u00f3, h\u00e3y xem x\u00e9t c\u00e1c ph\u01b0\u01a1ng ph\u00e1p hay nh\u1ea5t sau:<\/p>\n

        \n
      1. \n

        Chi\u1ebfn l\u01b0\u1ee3c b\u1ed9 nh\u1edb \u0111\u1ec7m<\/strong>: Ch\u1ecdn chi\u1ebfn l\u01b0\u1ee3c b\u1ed9 nh\u1edb \u0111\u1ec7m ph\u00f9 h\u1ee3p d\u1ef1a tr\u00ean lo\u1ea1i trang web v\u00e0 t\u00ednh ch\u1ea5t c\u1ee7a n\u1ed9i dung. Tri\u1ec3n khai b\u1ed9 nh\u1edb \u0111\u1ec7m ph\u00eda m\u00e1y kh\u00e1ch cho t\u00e0i nguy\u00ean t\u0129nh v\u00e0 b\u1ed9 nh\u1edb \u0111\u1ec7m ph\u00eda m\u00e1y ch\u1ee7 cho n\u1ed9i dung \u0111\u1ed9ng.<\/p>\n<\/li>\n

      2. \n

        Ti\u00eau \u0111\u1ec1 b\u1ed9 nh\u1edb \u0111\u1ec7m<\/strong>: S\u1eed d\u1ee5ng c\u00e1c ti\u00eau \u0111\u1ec1 b\u1ed9 \u0111\u1ec7m, ch\u1eb3ng h\u1ea1n nh\u01b0 Ki\u1ec3m so\u00e1t b\u1ed9 \u0111\u1ec7m, H\u1ebft h\u1ea1n v\u00e0 ETag, \u0111\u1ec3 ki\u1ec3m so\u00e1t h\u00e0nh vi b\u1ed9 \u0111\u1ec7m v\u00e0 th\u1eddi gian hi\u1ec7u l\u1ef1c c\u1ee7a b\u1ed9 \u0111\u1ec7m. C\u00e1c ti\u00eau \u0111\u1ec1 n\u00e0y gi\u00fap x\u00e1c \u0111\u1ecbnh ch\u00ednh s\u00e1ch b\u1ed9 nh\u1edb \u0111\u1ec7m v\u00e0 gi\u1ea3m nguy c\u01a1 cung c\u1ea5p n\u1ed9i dung c\u0169.<\/p>\n<\/li>\n

      3. \n

        V\u00f4 hi\u1ec7u h\u00f3a b\u1ed9 \u0111\u1ec7m<\/strong>: Tri\u1ec3n khai c\u00e1c c\u01a1 ch\u1ebf v\u00f4 hi\u1ec7u h\u00f3a b\u1ed9 nh\u1edb \u0111\u1ec7m th\u00edch h\u1ee3p \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o r\u1eb1ng c\u00e1c t\u00e0i nguy\u00ean \u0111\u01b0\u1ee3c c\u1eadp nh\u1eadt s\u1ebd thay th\u1ebf c\u00e1c phi\u00ean b\u1ea3n \u0111\u00e3 l\u01b0u trong b\u1ed9 nh\u1edb \u0111\u1ec7m c\u0169 h\u01a1n. \u0110i\u1ec1u n\u00e0y r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 duy tr\u00ec \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a d\u1eef li\u1ec7u v\u00e0 cung c\u1ea5p cho ng\u01b0\u1eddi d\u00f9ng n\u1ed9i dung m\u1edbi nh\u1ea5t.<\/p>\n<\/li>\n

      4. \n

        L\u1ecdc n\u1ed9i dung<\/strong>: Xem x\u00e9t c\u01a1 ch\u1ebf x\u00f3a n\u1ed9i dung \u0111\u1ec3 x\u00f3a b\u1ed9 nh\u1edb \u0111\u1ec7m cho c\u00e1c t\u00e0i nguy\u00ean c\u1ee5 th\u1ec3 khi c\u1ea7n thi\u1ebft. V\u00ed d\u1ee5: khi c\u1eadp nh\u1eadt m\u1ed9t ph\u1ea7n n\u1ed9i dung quan tr\u1ecdng, vi\u1ec7c x\u00f3a b\u1ed9 \u0111\u1ec7m cho t\u00e0i nguy\u00ean \u0111\u00f3 s\u1ebd \u0111\u1ea3m b\u1ea3o r\u1eb1ng ng\u01b0\u1eddi d\u00f9ng nh\u1eadn \u0111\u01b0\u1ee3c phi\u00ean b\u1ea3n m\u1edbi nh\u1ea5t.<\/p>\n<\/li>\n

      5. \n

        K\u00edch th\u01b0\u1edbc b\u1ed9 \u0111\u1ec7m v\u00e0 ch\u00ednh s\u00e1ch tr\u1ee5c xu\u1ea5t<\/strong>: Gi\u00e1m s\u00e1t k\u00edch th\u01b0\u1edbc b\u1ed9 nh\u1edb \u0111\u1ec7m v\u00e0 tri\u1ec3n khai c\u00e1c ch\u00ednh s\u00e1ch x\u00f3a b\u1ed9 nh\u1edb \u0111\u1ec7m hi\u1ec7u qu\u1ea3 \u0111\u1ec3 qu\u1ea3n l\u00fd vi\u1ec7c s\u1eed d\u1ee5ng b\u1ed9 nh\u1edb m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3. LRU (\u00cdt \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng g\u1ea7n \u0111\u00e2y nh\u1ea5t) v\u00e0 LFU (\u00cdt \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng th\u01b0\u1eddng xuy\u00ean nh\u1ea5t) l\u00e0 c\u00e1c ch\u00ednh s\u00e1ch thu h\u1ed3i b\u1ed9 nh\u1edb \u0111\u1ec7m ph\u1ed5 bi\u1ebfn.<\/p>\n<\/li>\n<\/ol>\n

        V\u1ea5n \u0111\u1ec1 v\u00e0 gi\u1ea3i ph\u00e1p:<\/h3>\n
          \n
        1. \n

          B\u1ed9 \u0111\u1ec7m c\u0169<\/strong>: M\u1ed9t trong nh\u1eefng v\u1ea5n \u0111\u1ec1 ph\u1ed5 bi\u1ebfn v\u1edbi b\u1ed9 nh\u1edb \u0111\u1ec7m l\u00e0 cung c\u1ea5p n\u1ed9i dung c\u0169 cho ng\u01b0\u1eddi d\u00f9ng khi t\u00e0i nguy\u00ean \u0111\u01b0\u1ee3c l\u01b0u trong b\u1ed9 nh\u1edb \u0111\u1ec7m tr\u1edf n\u00ean l\u1ed7i th\u1eddi. \u0110\u1ec3 gi\u1ea3i quy\u1ebft v\u1ea5n \u0111\u1ec1 n\u00e0y, h\u00e3y tri\u1ec3n khai c\u01a1 ch\u1ebf h\u1ebft h\u1ea1n b\u1ed9 \u0111\u1ec7m th\u00edch h\u1ee3p b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng ti\u00eau \u0111\u1ec1 b\u1ed9 \u0111\u1ec7m \u0111\u1ec3 t\u1ef1 \u0111\u1ed9ng l\u00e0m m\u1edbi b\u1ed9 \u0111\u1ec7m.<\/p>\n<\/li>\n

        2. \n

          Nh\u1eefng th\u00e1ch th\u1ee9c v\u00f4 hi\u1ec7u h\u00f3a b\u1ed9 \u0111\u1ec7m<\/strong>: Vi\u1ec7c qu\u1ea3n l\u00fd \u0111\u00fang c\u00e1ch vi\u1ec7c v\u00f4 hi\u1ec7u h\u00f3a b\u1ed9 \u0111\u1ec7m c\u00f3 th\u1ec3 ph\u1ee9c t\u1ea1p, \u0111\u1eb7c bi\u1ec7t \u0111\u1ed1i v\u1edbi n\u1ed9i dung \u0111\u1ed9ng thay \u0111\u1ed5i th\u01b0\u1eddng xuy\u00ean. Tri\u1ec3n khai c\u00e1c chi\u1ebfn l\u01b0\u1ee3c d\u1ef1a tr\u00ean phi\u00ean b\u1ea3n ho\u1eb7c d\u1ea5u th\u1eddi gian \u0111\u1ec3 v\u00f4 hi\u1ec7u h\u00f3a b\u1ed9 \u0111\u1ec7m khi n\u1ed9i dung \u0111\u01b0\u1ee3c c\u1eadp nh\u1eadt.<\/p>\n<\/li>\n

        3. \n

          T\u00ednh nh\u1ea5t qu\u00e1n c\u1ee7a b\u1ed9 \u0111\u1ec7m<\/strong>: Trong c\u00e1c h\u1ec7 th\u1ed1ng ph\u00e2n t\u00e1n c\u00f3 nhi\u1ec1u n\u00fat b\u1ed9 \u0111\u1ec7m, vi\u1ec7c duy tr\u00ec t\u00ednh nh\u1ea5t qu\u00e1n c\u1ee7a b\u1ed9 \u0111\u1ec7m tr\u00ean t\u1ea5t c\u1ea3 c\u00e1c n\u00fat c\u00f3 th\u1ec3 l\u00e0 m\u1ed9t th\u00e1ch th\u1ee9c. H\u00e3y c\u00e2n nh\u1eafc s\u1eed d\u1ee5ng c\u00e1c gi\u1ea3i ph\u00e1p b\u1ed9 nh\u1edb \u0111\u1ec7m ph\u00e2n t\u00e1n \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o t\u00ednh nh\u1ea5t qu\u00e1n, ch\u1eb3ng h\u1ea1n nh\u01b0 c\u00e1c giao th\u1ee9c v\u00f4 hi\u1ec7u h\u00f3a b\u1ed9 nh\u1edb \u0111\u1ec7m nh\u01b0 Memcached ho\u1eb7c Redis.<\/p>\n<\/li>\n

        4. \n

          Qu\u00e1 t\u1ea3i b\u1ed9 \u0111\u1ec7m<\/strong>: N\u1ebfu b\u1ed9 nh\u1edb \u0111\u1ec7m b\u1ecb h\u1ea1n ch\u1ebf ho\u1eb7c kh\u00f4ng \u0111\u01b0\u1ee3c qu\u1ea3n l\u00fd hi\u1ec7u qu\u1ea3, \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn t\u00ecnh tr\u1ea1ng qu\u00e1 t\u1ea3i b\u1ed9 nh\u1edb \u0111\u1ec7m, g\u00e2y ra t\u00ecnh tr\u1ea1ng x\u00f3a b\u1ed9 nh\u1edb \u0111\u1ec7m ho\u1eb7c thi\u1ebfu b\u1ed9 nh\u1edb \u0111\u1ec7m kh\u00f4ng c\u1ea7n thi\u1ebft. Gi\u00e1m s\u00e1t vi\u1ec7c s\u1eed d\u1ee5ng b\u1ed9 nh\u1edb \u0111\u1ec7m v\u00e0 n\u00e2ng c\u1ea5p ph\u1ea7n c\u1ee9ng khi c\u1ea7n thi\u1ebft \u0111\u1ec3 \u0111\u00e1p \u1ee9ng nhu c\u1ea7u b\u1ed9 nh\u1edb \u0111\u1ec7m ng\u00e0y c\u00e0ng t\u0103ng.<\/p>\n<\/li>\n<\/ol>\n

          C\u00e1c \u0111\u1eb7c \u0111i\u1ec3m ch\u00ednh v\u00e0 c\u00e1c so s\u00e1nh kh\u00e1c v\u1edbi c\u00e1c thu\u1eadt ng\u1eef t\u01b0\u01a1ng t\u1ef1 d\u01b0\u1edbi d\u1ea1ng b\u1ea3ng v\u00e0 danh s\u00e1ch.<\/h2>\n

          D\u01b0\u1edbi \u0111\u00e2y l\u00e0 so s\u00e1nh l\u01b0\u1ee3t truy c\u1eadp Cache v\u1edbi c\u00e1c thu\u1eadt ng\u1eef li\u00ean quan:<\/p>\n\n\n\n\n\n\n\n
          Thu\u1eadt ng\u1eef<\/th>\nS\u1ef1 mi\u00eau t\u1ea3<\/th>\n<\/tr>\n<\/thead>\n
          Thi\u1ebfu b\u1ed9 nh\u1edb \u0111\u1ec7m<\/strong><\/td>\nL\u1ed7i b\u1ed9 \u0111\u1ec7m x\u1ea3y ra khi kh\u00f4ng t\u00ecm th\u1ea5y t\u00e0i nguy\u00ean \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u trong b\u1ed9 nh\u1edb \u0111\u1ec7m v\u00e0 ph\u1ea3i \u0111\u01b0\u1ee3c t\u00ecm n\u1ea1p t\u1eeb m\u00e1y ch\u1ee7 g\u1ed1c. Kh\u00f4ng gi\u1ed1ng nh\u01b0 l\u1ed7i cache, n\u00f3 d\u1eabn \u0111\u1ebfn t\u0103ng th\u1eddi gian ph\u1ea3n h\u1ed3i v\u00e0 t\u1ea3i m\u00e1y ch\u1ee7.<\/td>\n<\/tr>\n
          X\u00f3a b\u1ed9 nh\u1edb \u0111\u1ec7m<\/strong><\/td>\nX\u00f3a b\u1ed9 nh\u1edb \u0111\u1ec7m l\u00e0 qu\u00e1 tr\u00ecnh x\u00f3a m\u1ed9t s\u1ed1 m\u1ee5c nh\u1ea5t \u0111\u1ecbnh kh\u1ecfi b\u1ed9 nh\u1edb \u0111\u1ec7m \u0111\u1ec3 t\u1ea1o kho\u1ea3ng tr\u1ed1ng cho c\u00e1c m\u1ee5c m\u1edbi h\u01a1n ho\u1eb7c \u0111\u01b0\u1ee3c truy c\u1eadp th\u01b0\u1eddng xuy\u00ean h\u01a1n. C\u00e1c ch\u00ednh s\u00e1ch lo\u1ea1i b\u1ecf, ch\u1eb3ng h\u1ea1n nh\u01b0 LRU (\u00cdt \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng g\u1ea7n \u0111\u00e2y nh\u1ea5t) ho\u1eb7c LFU (\u00cdt \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng th\u01b0\u1eddng xuy\u00ean nh\u1ea5t), x\u00e1c \u0111\u1ecbnh m\u1ee5c n\u00e0o s\u1ebd b\u1ecb x\u00f3a kh\u1ecfi b\u1ed9 \u0111\u1ec7m. Vi\u1ec7c x\u00f3a b\u1ed9 \u0111\u1ec7m gi\u00fap duy tr\u00ec k\u00edch th\u01b0\u1edbc b\u1ed9 \u0111\u1ec7m v\u00e0 ng\u0103n ng\u1eeba t\u00ecnh tr\u1ea1ng tr\u00e0n b\u1ed9 \u0111\u1ec7m kh\u00f4ng c\u1ea7n thi\u1ebft.<\/td>\n<\/tr>\n
          M\u00e1y ch\u1ee7 proxy<\/strong><\/td>\nM\u00e1y ch\u1ee7 proxy ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t trung gian gi\u1eefa thi\u1ebft b\u1ecb kh\u00e1ch v\u00e0 m\u00e1y ch\u1ee7 g\u1ed1c. N\u00f3 c\u00f3 th\u1ec3 l\u01b0u v\u00e0o b\u1ed9 nh\u1edb \u0111\u1ec7m c\u00e1c t\u00e0i nguy\u00ean v\u00e0 ph\u1ea3n h\u1ed3i, n\u00e2ng cao hi\u1ec7u su\u1ea5t trang web b\u1eb1ng c\u00e1ch cung c\u1ea5p n\u1ed9i dung \u0111\u01b0\u1ee3c l\u01b0u trong b\u1ed9 nh\u1edb \u0111\u1ec7m cho m\u00e1y kh\u00e1ch tr\u1ef1c ti\u1ebfp t\u1eeb b\u1ed9 \u0111\u1ec7m proxy. M\u00e1y ch\u1ee7 proxy th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 c\u1ea3i thi\u1ec7n t\u00ednh b\u1ea3o m\u1eadt, quy\u1ec1n ri\u00eang t\u01b0 v\u00e0 hi\u1ec7u su\u1ea5t, khi\u1ebfn ch\u00fang tr\u1edf th\u00e0nh s\u1ef1 b\u1ed5 sung l\u00fd t\u01b0\u1edfng cho c\u00e1c chi\u1ebfn l\u01b0\u1ee3c truy c\u1eadp b\u1ed9 \u0111\u1ec7m.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

          C\u00e1c quan \u0111i\u1ec3m v\u00e0 c\u00f4ng ngh\u1ec7 trong t\u01b0\u01a1ng lai li\u00ean quan \u0111\u1ebfn Cache hit.<\/h2>\n

          T\u01b0\u01a1ng lai c\u1ee7a cache hit \u0111\u1ea7y h\u1ee9a h\u1eb9n khi c\u00f4ng ngh\u1ec7 web ti\u1ebfp t\u1ee5c ph\u00e1t tri\u1ec3n v\u00e0 nhu c\u1ea7u v\u1ec1 c\u00e1c trang web t\u1ea3i nhanh h\u01a1n t\u0103ng l\u00ean. M\u1ed9t s\u1ed1 quan \u0111i\u1ec3m v\u00e0 c\u00f4ng ngh\u1ec7 li\u00ean quan \u0111\u1ebfn cache hit bao g\u1ed3m:<\/p>\n

            \n
          1. \n

            B\u1ed9 nh\u1edb \u0111\u1ec7m c\u1ea1nh<\/strong>: B\u1ed9 nh\u1edb \u0111\u1ec7m bi\u00ean, n\u01a1i c\u00e1c m\u00e1y ch\u1ee7 b\u1ed9 \u0111\u1ec7m \u0111\u01b0\u1ee3c \u0111\u1eb7t g\u1ea7n ng\u01b0\u1eddi d\u00f9ng cu\u1ed1i h\u01a1n \u1edf bi\u00ean m\u1ea1ng, s\u1ebd tr\u1edf n\u00ean ph\u1ed5 bi\u1ebfn h\u01a1n. C\u00e1ch ti\u1ebfp c\u1eadn n\u00e0y gi\u00fap gi\u1ea3m \u0111\u1ed9 tr\u1ec5 h\u01a1n n\u1eefa v\u00e0 c\u1ea3i thi\u1ec7n t\u1ed1c \u0111\u1ed9 nh\u1ea5n b\u1ed9 \u0111\u1ec7m b\u1eb1ng c\u00e1ch gi\u1ea3m thi\u1ec3u kho\u1ea3ng c\u00e1ch gi\u1eefa ng\u01b0\u1eddi d\u00f9ng v\u00e0 m\u00e1y ch\u1ee7 b\u1ed9 \u0111\u1ec7m.<\/p>\n<\/li>\n

          2. \n

            M\u1ea1ng ph\u00e2n ph\u1ed1i n\u1ed9i dung (CDN)<\/strong>: CDN s\u1ebd ti\u1ebfp t\u1ee5c \u0111\u00f3ng m\u1ed9t vai tr\u00f2 quan tr\u1ecdng trong chi\u1ebfn l\u01b0\u1ee3c truy c\u1eadp b\u1ed9 \u0111\u1ec7m. CDN ph\u00e2n ph\u1ed1i n\u1ed9i dung \u0111\u01b0\u1ee3c l\u01b0u trong b\u1ed9 nh\u1edb \u0111\u1ec7m tr\u00ean nhi\u1ec1u m\u00e1y ch\u1ee7 \u0111\u1eb7t tr\u00ean to\u00e0n th\u1ebf gi\u1edbi, cho ph\u00e9p ph\u00e2n ph\u1ed1i n\u1ed9i dung hi\u1ec7u qu\u1ea3 v\u00e0 gi\u1ea3m t\u1ea3i cho c\u00e1c m\u00e1y ch\u1ee7 g\u1ed1c.<\/p>\n<\/li>\n

          3. \n

            B\u1ed9 nh\u1edb \u0111\u1ec7m d\u1ef1a tr\u00ean m\u00e1y h\u1ecdc<\/strong>: Nh\u1eefng ti\u1ebfn b\u1ed9 trong h\u1ecdc m\u00e1y s\u1ebd \u0111\u01b0\u1ee3c t\u00edch h\u1ee3p v\u00e0o chi\u1ebfn l\u01b0\u1ee3c truy c\u1eadp b\u1ed9 nh\u1edb \u0111\u1ec7m \u0111\u1ec3 d\u1ef1 \u0111o\u00e1n v\u00e0 ph\u00e2n ph\u00e1t n\u1ed9i dung \u0111\u01b0\u1ee3c l\u01b0u trong b\u1ed9 nh\u1edb \u0111\u1ec7m m\u1ed9t c\u00e1ch th\u00f4ng minh h\u01a1n. Thu\u1eadt to\u00e1n ML c\u00f3 th\u1ec3 ph\u00e2n t\u00edch h\u00e0nh vi, xu h\u01b0\u1edbng v\u00e0 ki\u1ec3u truy c\u1eadp l\u1ecbch s\u1eed c\u1ee7a ng\u01b0\u1eddi d\u00f9ng \u0111\u1ec3 t\u1ed1i \u01b0u h\u00f3a t\u1ef7 l\u1ec7 truy c\u1eadp b\u1ed9 \u0111\u1ec7m.<\/p>\n<\/li>\n

          4. \n

            B\u1ed9 nh\u1edb \u0111\u1ec7m n\u1ed9i dung \u0111\u1ed9ng<\/strong>: Nh\u1eefng c\u1ea3i ti\u1ebfn trong b\u1ed9 nh\u1edb \u0111\u1ec7m n\u1ed9i dung \u0111\u1ed9ng s\u1ebd cho ph\u00e9p b\u1ed9 nh\u1edb \u0111\u1ec7m hi\u1ec7u qu\u1ea3 h\u01a1n \u0111\u1ed1i v\u1edbi n\u1ed9i dung \u0111\u01b0\u1ee3c c\u00e1 nh\u00e2n h\u00f3a v\u00e0 \u0111\u01b0\u1ee3c t\u1ea1o \u0111\u1ed9ng, ch\u1eb3ng h\u1ea1n nh\u01b0 c\u00e1c \u0111\u1ec1 xu\u1ea5t d\u00e0nh ri\u00eang cho ng\u01b0\u1eddi d\u00f9ng v\u00e0 trang t\u1ed5ng quan \u0111\u01b0\u1ee3c c\u00e1 nh\u00e2n h\u00f3a.<\/p>\n<\/li>\n<\/ol>\n

            C\u00e1ch s\u1eed d\u1ee5ng ho\u1eb7c li\u00ean k\u1ebft m\u00e1y ch\u1ee7 proxy v\u1edbi l\u1ea7n truy c\u1eadp Cache.<\/h2>\n

            M\u00e1y ch\u1ee7 proxy v\u1ed1n c\u00f3 li\u00ean quan \u0111\u1ebfn chi\u1ebfn l\u01b0\u1ee3c truy c\u1eadp b\u1ed9 \u0111\u1ec7m. L\u00e0 trung gian gi\u1eefa m\u00e1y kh\u00e1ch v\u00e0 m\u00e1y ch\u1ee7 g\u1ed1c, m\u00e1y ch\u1ee7 proxy c\u00f3 th\u1ec3 tri\u1ec3n khai hi\u1ec7u qu\u1ea3 c\u00e1c k\u1ef9 thu\u1eadt truy c\u1eadp b\u1ed9 \u0111\u1ec7m \u0111\u1ec3 n\u00e2ng cao hi\u1ec7u su\u1ea5t trang web. M\u1ed9t s\u1ed1 c\u00e1ch m\u00e1y ch\u1ee7 proxy s\u1eed d\u1ee5ng l\u1ea7n truy c\u1eadp b\u1ed9 \u0111\u1ec7m bao g\u1ed3m:<\/p>\n

              \n
            1. \n

              B\u1ed9 nh\u1edb \u0111\u1ec7m n\u1ed9i dung t\u0129nh<\/strong>: M\u00e1y ch\u1ee7 proxy c\u00f3 th\u1ec3 l\u01b0u v\u00e0o b\u1ed9 nh\u1edb \u0111\u1ec7m c\u00e1c t\u00e0i nguy\u00ean t\u0129nh nh\u01b0 h\u00ecnh \u1ea3nh, bi\u1ec3u \u0111\u1ecbnh ki\u1ec3u v\u00e0 t\u1eadp l\u1ec7nh, gi\u00fap gi\u1ea3m nhu c\u1ea7u kh\u00e1ch h\u00e0ng t\u00ecm n\u1ea1p c\u00e1c t\u00e0i nguy\u00ean n\u00e0y t\u1eeb m\u00e1y ch\u1ee7 g\u1ed1c. C\u00e1ch ti\u1ebfp c\u1eadn n\u00e0y t\u0103ng t\u1ed1c th\u1eddi gian t\u1ea3i trang v\u00e0 b\u1ea3o t\u1ed3n t\u00e0i nguy\u00ean m\u00e1y ch\u1ee7.<\/p>\n<\/li>\n

            2. \n

              B\u1ed9 nh\u1edb \u0111\u1ec7m proxy ng\u01b0\u1ee3c<\/strong>: M\u00e1y ch\u1ee7 proxy ng\u01b0\u1ee3c, \u0111\u01b0\u1ee3c \u0111\u1eb7t ph\u00eda tr\u01b0\u1edbc m\u00e1y ch\u1ee7 web, l\u01b0u tr\u1eef c\u00e1c ph\u1ea3n h\u1ed3i n\u1ed9i dung \u0111\u1ed9ng t\u1eeb m\u00e1y ch\u1ee7 g\u1ed1c. Khi c\u00f9ng m\u1ed9t n\u1ed9i dung \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u l\u1ea1i, proxy ng\u01b0\u1ee3c c\u00f3 th\u1ec3 ph\u1ee5c v\u1ee5 n\u1ed9i dung \u0111\u00f3 tr\u1ef1c ti\u1ebfp t\u1eeb b\u1ed9 \u0111\u1ec7m c\u1ee7a n\u00f3, d\u1eabn \u0111\u1ebfn truy c\u1eadp b\u1ed9 \u0111\u1ec7m v\u00e0 ph\u1ea3n h\u1ed3i nhanh h\u01a1n.<\/p>\n<\/li>\n

            3. \n

              Ph\u00e2n ph\u1ed1i n\u1ed9i dung<\/strong>: M\u00e1y ch\u1ee7 proxy \u0111\u01b0\u1ee3c tri\u1ec3n khai trong b\u1ed9 \u0111\u1ec7m c\u1ee7a m\u1ea1ng ph\u00e2n ph\u1ed1i n\u1ed9i dung (CDN) v\u00e0 ph\u00e2n ph\u1ed1i n\u1ed9i dung tr\u00ean nhi\u1ec1u v\u1ecb tr\u00ed. B\u1eb1ng c\u00e1ch ph\u00e2n ph\u1ed1i n\u1ed9i dung \u0111\u01b0\u1ee3c l\u01b0u trong b\u1ed9 nh\u1edb \u0111\u1ec7m t\u1eeb m\u00e1y ch\u1ee7 proxy g\u1ea7n nh\u1ea5t t\u1edbi ng\u01b0\u1eddi d\u00f9ng, t\u1ed1c \u0111\u1ed9 nh\u1ea5n b\u1ed9 nh\u1edb \u0111\u1ec7m \u0111\u01b0\u1ee3c t\u1ed1i \u0111a h\u00f3a, d\u1eabn \u0111\u1ebfn hi\u1ec7u su\u1ea5t \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n.<\/p>\n<\/li>\n

            4. \n

              C\u00e2n b\u1eb1ng t\u1ea3i<\/strong>: M\u00e1y ch\u1ee7 proxy c\u00f3 th\u1ec3 ph\u00e2n ph\u1ed1i c\u00e1c y\u00eau c\u1ea7u c\u1ee7a kh\u00e1ch h\u00e0ng tr\u00ean nhi\u1ec1u m\u00e1y ch\u1ee7 g\u1ed1c, c\u00e2n b\u1eb1ng t\u1ea3i v\u00e0 gi\u1ea3m nguy c\u01a1 thi\u1ebfu b\u1ed9 nh\u1edb \u0111\u1ec7m do m\u00e1y ch\u1ee7 qu\u00e1 t\u1ea3i.<\/p>\n<\/li>\n<\/ol>\n

              Li\u00ean k\u1ebft li\u00ean quan<\/h2>\n

              \u0110\u1ec3 bi\u1ebft th\u00eam th\u00f4ng tin v\u1ec1 Cache hit v\u00e0 c\u00e1c ch\u1ee7 \u0111\u1ec1 li\u00ean quan, b\u1ea1n c\u00f3 th\u1ec3 tham kh\u1ea3o c\u00e1c t\u00e0i nguy\u00ean sau:<\/p>\n

                \n
              1. Hi\u1ec3u b\u1ed9 nh\u1edb \u0111\u1ec7m HTTP<\/a><\/li>\n
              2. H\u01b0\u1edbng d\u1eabn l\u01b0u v\u00e0o b\u1ed9 nh\u1edb \u0111\u1ec7m d\u00e0nh cho t\u00e1c gi\u1ea3 v\u00e0 qu\u1ea3n tr\u1ecb vi\u00ean web<\/a><\/li>\n
              3. Gi\u1edbi thi\u1ec7u v\u1ec1 CDN v\u00e0 c\u00e1ch ch\u00fang ho\u1ea1t \u0111\u1ed9ng<\/a><\/li>\n
              4. Vai tr\u00f2 c\u1ee7a Reverse Proxy trong Ki\u1ebfn tr\u00fac \u1ee9ng d\u1ee5ng Web<\/a><\/li>\n<\/ol>\n

                H\u00e3y nh\u1edb r\u1eb1ng, cache hit l\u00e0 m\u1ed9t k\u1ef9 thu\u1eadt m\u1ea1nh m\u1ebd c\u00f3 th\u1ec3 n\u00e2ng cao \u0111\u00e1ng k\u1ec3 hi\u1ec7u su\u1ea5t trang web v\u00e0 tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng. B\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng hi\u1ec7u qu\u1ea3 c\u00e1c chi\u1ebfn l\u01b0\u1ee3c nh\u1ea5n b\u1ed9 \u0111\u1ec7m v\u00e0 t\u1ed1i \u01b0u h\u00f3a ch\u00ednh s\u00e1ch b\u1ed9 \u0111\u1ec7m, c\u00e1c trang web c\u00f3 th\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c th\u1eddi gian t\u1ea3i nhanh h\u01a1n, gi\u1ea3m t\u1ea3i m\u00e1y ch\u1ee7 v\u00e0 c\u1ea3i thi\u1ec7n hi\u1ec7u qu\u1ea3 t\u1ed5ng th\u1ec3.<\/p>","protected":false},"featured_media":476154,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-476153","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about Cache hit for the website of the proxy server provider OneProxy (oneproxy.pro)<\/mark>","faq_items":[{"question":"What is Cache hit, and how does it benefit website performance?<\/strong>","answer":"

                Cache hit refers to the successful retrieval of a requested resource from the cache memory, avoiding the need to fetch it from the origin server. This caching technique significantly reduces response times, lowers server load, and enhances user experience by serving frequently accessed content directly from the cache.<\/p>"},{"question":"How did Cache hit originate, and when was it first mentioned?<\/strong>","answer":"

                The concept of caching dates back to the early days of computing, where systems stored frequently accessed data in a faster memory location. In the context of web servers, the term \"Cache hit\" gained prominence as the internet evolved in the late 20th century. Early web servers and browsers started using caches to store frequently requested web resources for faster loading times.<\/p>"},{"question":"What is the internal structure of Cache hit, and how does it work?<\/strong>","answer":"

                The internal structure of Cache hit involves steps like hashing, cache lookup, and cache hit or miss. When a request comes in, the server generates a unique identifier (hash) based on the request parameters. It checks the cache memory using this hash to determine if the requested resource exists. If found (cache hit), the resource is immediately served from the cache; if not (cache miss), it's fetched from the origin server and stored in the cache for future requests.<\/p>"},{"question":"What are the types of Cache hit, and how do they differ?<\/strong>","answer":"

                Cache hit types are based on the level of caching and the scope of cached resources. Based on the level of caching, there are client-side cache (in the user's web browser) and server-side cache (at the web server level). Based on the scope of cached resources, there are page cache (entire web pages) and object cache (specific objects or fragments of a page).<\/p>"},{"question":"How can Cache hit be effectively used, and what are common problems and solutions related to its use?<\/strong>","answer":"

                To optimize cache hit, implement the right caching strategy based on the type of content. Use caching headers, manage cache invalidation, and consider content purging to handle updates effectively. Watch for problems like serving stale cache, cache inconsistency in distributed systems, and cache overload, and address them through proper cache expiration and eviction policies.<\/p>"},{"question":"How does Cache hit compare to other caching-related terms like Cache Miss and Cache Eviction?<\/strong>","answer":"

                Cache hit refers to successfully retrieving a resource from cache, while Cache Miss occurs when a resource is not found in cache and must be fetched from the origin server. Cache Eviction, on the other hand, involves removing items from the cache to make space for newer or frequently accessed items.<\/p>"},{"question":"What are the perspectives and future technologies related to Cache hit?<\/strong>","answer":"

                The future of Cache hit looks promising with advancements in edge caching, CDNs, machine learning-based caching, and dynamic content caching. These technologies aim to further reduce latency, improve cache hit rates, and optimize website performance.<\/p>"},{"question":"How are proxy servers associated with Cache hit, and how do they contribute to website optimization?<\/strong>","answer":"

                Proxy servers play a vital role in Cache hit strategies as intermediaries between clients and origin servers. They can cache static and dynamic content, implement reverse proxy caching, distribute content through CDNs, and balance server loads, all of which contribute to faster load times and enhanced user experiences.<\/p>"},{"question":"Where can I find more information about Cache hit and related topics?<\/strong>","answer":"

                For more in-depth knowledge about Cache hit, caching techniques, and related technologies, refer to the following resources:<\/p>

                1. Understanding HTTP Caching<\/a><\/li>
                2. Caching Tutorial for Web Authors and Webmasters<\/a><\/li>
                3. Introduction to CDNs and How They Work<\/a><\/li>
                4. The Role of Reverse Proxy in Web Application Architecture<\/a><\/li><\/ol>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/476153","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki"}],"about":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/types\/wiki"}],"version-history":[{"count":0,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/476153\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media\/476154"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media?parent=476153"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}