{"id":476933,"date":"2023-08-09T09:05:36","date_gmt":"2023-08-09T09:05:36","guid":{"rendered":""},"modified":"2023-09-05T11:13:43","modified_gmt":"2023-09-05T11:13:43","slug":"dns-round-robin","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/vn\/wiki\/dns-round-robin\/","title":{"rendered":"DNS v\u00f2ng tr\u00f2n"},"content":{"rendered":"

DNS round-robin l\u00e0 m\u1ed9t k\u1ef9 thu\u1eadt c\u00e2n b\u1eb1ng t\u1ea3i \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ph\u00e2n ph\u1ed1i l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp m\u1ea1ng \u0111\u1ebfn tr\u00ean nhi\u1ec1u m\u00e1y ch\u1ee7 theo ki\u1ec3u round-robin. \u0110\u00e2y l\u00e0 c\u01a1 ch\u1ebf c\u01a1 b\u1ea3n \u0111\u1ec3 n\u00e2ng cao hi\u1ec7u su\u1ea5t, t\u00ednh d\u1ef1 ph\u00f2ng v\u00e0 kh\u1ea3 n\u0103ng ch\u1ecbu l\u1ed7i c\u1ee7a c\u00e1c trang web v\u00e0 d\u1ecbch v\u1ee5. B\u1eb1ng c\u00e1ch t\u1eadn d\u1ee5ng DNS (H\u1ec7 th\u1ed1ng t\u00ean mi\u1ec1n), ph\u01b0\u01a1ng ph\u00e1p n\u00e0y cho ph\u00e9p nhi\u1ec1u \u0111\u1ecba ch\u1ec9 IP \u0111\u01b0\u1ee3c li\u00ean k\u1ebft v\u1edbi m\u1ed9t t\u00ean mi\u1ec1n duy nh\u1ea5t. Khi kh\u00e1ch h\u00e0ng y\u00eau c\u1ea7u \u0111\u1ecba ch\u1ec9 IP cho mi\u1ec1n, DNS s\u1ebd tr\u1ea3 v\u1ec1 m\u1ed9t \u0111\u1ecba ch\u1ec9 IP kh\u00e1c t\u1eeb nh\u00f3m theo c\u00e1ch lu\u00e2n phi\u00ean, ph\u00e2n b\u1ed5 \u0111\u1ec1u l\u01b0u l\u01b0\u1ee3ng gi\u1eefa c\u00e1c m\u00e1y ch\u1ee7 \u0111\u01b0\u1ee3c li\u00ean k\u1ebft.<\/p>\n

L\u1ecbch s\u1eed v\u1ec1 ngu\u1ed3n g\u1ed1c c\u1ee7a DNS round-robin v\u00e0 l\u1ea7n \u0111\u1ea7u ti\u00ean \u0111\u1ec1 c\u1eadp \u0111\u1ebfn n\u00f3<\/h2>\n

Kh\u00e1i ni\u1ec7m DNS round-robin c\u00f3 t\u1eeb nh\u1eefng ng\u00e0y \u0111\u1ea7u c\u1ee7a Internet. \u00dd t\u01b0\u1edfng ban \u0111\u1ea7u l\u00e0 cho ph\u00e9p c\u00e2n b\u1eb1ng t\u1ea3i v\u00e0 chuy\u1ec3n \u0111\u1ed5i d\u1ef1 ph\u00f2ng c\u01a1 b\u1ea3n b\u1eb1ng c\u00e1ch c\u00f3 nhi\u1ec1u b\u1ea3n ghi A (\u0110\u1ecba ch\u1ec9) trong t\u1ec7p v\u00f9ng DNS, m\u1ed7i b\u1ea3n ghi tr\u1ecf \u0111\u1ebfn m\u1ed9t m\u00e1y ch\u1ee7 kh\u00e1c nhau. L\u1ea7n \u0111\u1ea7u ti\u00ean \u0111\u1ec1 c\u1eadp \u0111\u1ebfn DNS round-robin c\u00f3 th\u1ec3 b\u1eaft ngu\u1ed3n t\u1eeb RFC 970, xu\u1ea5t b\u1ea3n n\u0103m 1985, \u0111\u01b0a ra kh\u00e1i ni\u1ec7m v\u1ec1 nhi\u1ec1u \u0111\u1ecba ch\u1ec9 IP cho m\u1ed9t t\u00ean mi\u1ec1n.<\/p>\n

Th\u00f4ng tin chi ti\u1ebft v\u1ec1 DNS round-robin<\/h2>\n

DNS round-robin ho\u1ea1t \u0111\u1ed9ng theo nguy\u00ean t\u1eafc \u0111\u01a1n gi\u1ea3n l\u00e0 duy\u1ec7t qua danh s\u00e1ch c\u00e1c \u0111\u1ecba ch\u1ec9 IP \u0111\u1ec3 ph\u1ea3n h\u1ed3i c\u00e1c truy v\u1ea5n DNS. Khi kh\u00e1ch h\u00e0ng \u0111\u01b0a ra y\u00eau c\u1ea7u ph\u00e2n gi\u1ea3i t\u00ean mi\u1ec1n, m\u00e1y ch\u1ee7 DNS s\u1ebd ch\u1ecdn ng\u1eabu nhi\u00ean m\u1ed9t \u0111\u1ecba ch\u1ec9 IP t\u1eeb danh s\u00e1ch v\u00e0 tr\u1ea3 v\u1ec1 \u0111\u1ecba ch\u1ec9 \u0111\u00f3 l\u00e0m ph\u1ea3n h\u1ed3i. C\u00e1c truy v\u1ea5n DNS ti\u1ebfp theo t\u1eeb c\u00e1c m\u00e1y kh\u00e1ch kh\u00e1c c\u00f3 th\u1ec3 nh\u1eadn \u0111\u01b0\u1ee3c c\u00e1c \u0111\u1ecba ch\u1ec9 IP kh\u00e1c nhau trong danh s\u00e1ch, do \u0111\u00f3 ph\u00e2n ph\u1ed1i l\u01b0u l\u01b0\u1ee3ng gi\u1eefa c\u00e1c m\u00e1y ch\u1ee7.<\/p>\n

C\u1ea5u tr\u00fac b\u00ean trong c\u1ee7a DNS round-robin: C\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a DNS round-robin<\/h2>\n

DNS round-robin ho\u1ea1t \u0111\u1ed9ng trong h\u1ec7 th\u1ed1ng ph\u00e2n c\u1ea5p H\u1ec7 th\u1ed1ng t\u00ean mi\u1ec1n. Khi tr\u00ecnh ph\u00e2n gi\u1ea3i DNS nh\u1eadn \u0111\u01b0\u1ee3c truy v\u1ea5n cho mi\u1ec1n c\u00f3 nhi\u1ec1u \u0111\u1ecba ch\u1ec9 IP (do c\u1ea5u h\u00ecnh quay v\u00f2ng), n\u00f3 s\u1ebd tr\u1ea3 v\u1ec1 m\u1ed9t trong c\u00e1c \u0111\u1ecba ch\u1ec9 IP t\u1eeb danh s\u00e1ch trong m\u1ed7i ph\u1ea3n h\u1ed3i. Vi\u1ec7c l\u1ef1a ch\u1ecdn \u0111\u1ecba ch\u1ec9 IP th\u01b0\u1eddng d\u1ef1a tr\u00ean th\u1ee9 t\u1ef1 ch\u00fang xu\u1ea5t hi\u1ec7n trong t\u1ec7p v\u00f9ng DNS.<\/p>\n

Qu\u00e1 tr\u00ecnh n\u00e0y c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u00f3m t\u1eaft trong c\u00e1c b\u01b0\u1edbc sau:<\/p>\n

    \n
  1. M\u1ed9t kh\u00e1ch h\u00e0ng th\u1ef1c hi\u1ec7n truy v\u1ea5n DNS cho m\u1ed9t t\u00ean mi\u1ec1n.<\/li>\n
  2. Tr\u00ecnh ph\u00e2n gi\u1ea3i DNS tra c\u1ee9u c\u00e1c b\u1ea3n ghi DNS c\u1ee7a mi\u1ec1n v\u00e0 t\u00ecm th\u1ea5y nhi\u1ec1u \u0111\u1ecba ch\u1ec9 IP \u0111\u01b0\u1ee3c li\u00ean k\u1ebft v\u1edbi n\u00f3.<\/li>\n
  3. Tr\u00ecnh ph\u00e2n gi\u1ea3i DNS tr\u1ea3 v\u1ec1 m\u1ed9t trong c\u00e1c \u0111\u1ecba ch\u1ec9 IP cho m\u00e1y kh\u00e1ch, xoay v\u00f2ng l\u1ef1a ch\u1ecdn cho m\u1ed7i truy v\u1ea5n ti\u1ebfp theo.<\/li>\n<\/ol>\n

    Ph\u00e2n t\u00edch c\u00e1c t\u00ednh n\u0103ng ch\u00ednh c\u1ee7a DNS round-robin<\/h2>\n

    DNS round-robin cung c\u1ea5p m\u1ed9t s\u1ed1 t\u00ednh n\u0103ng ch\u00ednh gi\u00fap n\u00f3 tr\u1edf th\u00e0nh m\u1ed9t c\u00f4ng c\u1ee5 c\u00f3 gi\u00e1 tr\u1ecb \u0111\u1ec3 c\u00e2n b\u1eb1ng t\u1ea3i v\u00e0 n\u00e2ng cao t\u00ednh kh\u1ea3 d\u1ee5ng c\u1ee7a m\u00e1y ch\u1ee7:<\/p>\n

      \n
    1. \n

      Ph\u00e2n ph\u1ed1i t\u1ea3i<\/strong>: B\u1eb1ng c\u00e1ch xoay v\u00f2ng c\u00e1c \u0111\u1ecba ch\u1ec9 IP trong ph\u1ea3n h\u1ed3i DNS, DNS lu\u00e2n chuy\u1ec3n \u0111\u1ed3ng \u0111\u1ec1u ph\u00e2n ph\u1ed1i l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp \u0111\u1ebfn tr\u00ean nhi\u1ec1u m\u00e1y ch\u1ee7, ng\u0103n ch\u1eb7n t\u00ecnh tr\u1ea1ng qu\u00e1 t\u1ea3i c\u1ee7a b\u1ea5t k\u1ef3 m\u00e1y ch\u1ee7 n\u00e0o.<\/p>\n<\/li>\n

    2. \n

      T\u00ednh s\u1eb5n s\u00e0ng cao<\/strong>: B\u1eb1ng c\u00e1ch li\u00ean k\u1ebft nhi\u1ec1u m\u00e1y ch\u1ee7 v\u1edbi m\u1ed9t mi\u1ec1n duy nh\u1ea5t, DNS round-robin cung c\u1ea5p kh\u1ea3 n\u0103ng d\u1ef1 ph\u00f2ng. N\u1ebfu m\u1ed9t m\u00e1y ch\u1ee7 kh\u00f4ng kh\u1ea3 d\u1ee5ng th\u00ec c\u00e1c m\u00e1y ch\u1ee7 c\u00f2n l\u1ea1i c\u00f3 th\u1ec3 ti\u1ebfp t\u1ee5c x\u1eed l\u00fd c\u00e1c y\u00eau c\u1ea7u \u0111\u1ebfn.<\/p>\n<\/li>\n

    3. \n

      D\u1ec5 th\u1ef1c hi\u1ec7n<\/strong>: DNS round-robin c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c tri\u1ec3n khai d\u1ec5 d\u00e0ng b\u1eb1ng c\u00e1ch th\u00eam nhi\u1ec1u b\u1ea3n ghi A v\u00e0o t\u1ec7p v\u00f9ng DNS. N\u00f3 kh\u00f4ng y\u00eau c\u1ea7u c\u1ea5u h\u00ecnh ph\u1ee9c t\u1ea1p ho\u1eb7c thay \u0111\u1ed5i \u0111\u1ed1i v\u1edbi thi\u1ebft l\u1eadp \u1ee9ng d\u1ee5ng ho\u1eb7c m\u00e1y ch\u1ee7.<\/p>\n<\/li>\n

    4. \n

      Gi\u00e1 th\u1ea5p<\/strong>: DNS round-robin l\u00e0 m\u1ed9t gi\u1ea3i ph\u00e1p ti\u1ebft ki\u1ec7m chi ph\u00ed v\u00ec n\u00f3 kh\u00f4ng y\u00eau c\u1ea7u ph\u1ea7n c\u1ee9ng ho\u1eb7c ph\u1ea7n m\u1ec1m chuy\u00ean d\u1ee5ng, gi\u00fap c\u00e1c doanh nghi\u1ec7p v\u00e0 t\u1ed5 ch\u1ee9c nh\u1ecf c\u00f3 th\u1ec3 truy c\u1eadp \u0111\u01b0\u1ee3c.<\/p>\n<\/li>\n

    5. \n

      \u0110\u1ed9 d\u00ednh phi\u00ean<\/strong>: M\u1eb7c d\u00f9 DNS lu\u00e2n chuy\u1ec3n ph\u00e2n ph\u1ed1i l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp tr\u00ean nhi\u1ec1u m\u00e1y ch\u1ee7 nh\u01b0ng n\u00f3 thi\u1ebfu kh\u1ea3 n\u0103ng duy tr\u00ec t\u00ednh \u1ed5n \u0111\u1ecbnh c\u1ee7a phi\u00ean. K\u1ebft qu\u1ea3 l\u00e0 c\u00e1c y\u00eau c\u1ea7u li\u00ean ti\u1ebfp t\u1eeb c\u00f9ng m\u1ed9t m\u00e1y kh\u00e1ch c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c chuy\u1ec3n h\u01b0\u1edbng \u0111\u1ebfn c\u00e1c m\u00e1y ch\u1ee7 kh\u00e1c nhau.<\/p>\n<\/li>\n<\/ol>\n

      C\u00e1c lo\u1ea1i DNS v\u00f2ng tr\u00f2n<\/h2>\n

      C\u00f3 hai lo\u1ea1i c\u1ea5u h\u00ecnh v\u00f2ng tr\u00f2n DNS ch\u00ednh: v\u00f2ng tr\u00f2n \u0111\u01a1n gi\u1ea3n v\u00e0 v\u00f2ng tr\u00f2n c\u00f3 tr\u1ecdng s\u1ed1.<\/p>\n

      1. V\u00f2ng tr\u00f2n \u0111\u01a1n gi\u1ea3n<\/h3>\n

      Theo c\u00e1ch ti\u1ebfp c\u1eadn v\u00f2ng tr\u00f2n \u0111\u01a1n gi\u1ea3n, t\u1ea5t c\u1ea3 c\u00e1c \u0111\u1ecba ch\u1ec9 IP \u0111\u1ec1u \u0111\u01b0\u1ee3c x\u1eed l\u00fd nh\u01b0 nhau v\u00e0 tr\u00ecnh ph\u00e2n gi\u1ea3i DNS s\u1ebd tu\u1ea7n t\u1ef1 duy\u1ec7t qua ch\u00fang. M\u1ed7i m\u00e1y ch\u1ee7 nh\u1eadn \u0111\u01b0\u1ee3c m\u1ed9t ph\u1ea7n l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp \u0111\u1ebfn b\u1eb1ng nhau, gi\u1ea3 s\u1eed t\u1ea5t c\u1ea3 c\u00e1c m\u00e1y ch\u1ee7 \u0111\u1ec1u c\u00f3 n\u0103ng l\u1ef1c t\u01b0\u01a1ng t\u1ef1.<\/p>\n

      2. V\u00f2ng tr\u00f2n c\u00f3 tr\u1ecdng s\u1ed1<\/h3>\n

      V\u00f2ng tr\u00f2n c\u00f3 tr\u1ecdng s\u1ed1 \u0111\u01b0a ra kh\u00e1i ni\u1ec7m v\u1ec1 m\u1ee9c \u0111\u1ed9 \u01b0u ti\u00ean \u0111\u1ed1i v\u1edbi c\u00e1c \u0111\u1ecba ch\u1ec9 IP. M\u1ed7i \u0111\u1ecba ch\u1ec9 IP \u0111\u01b0\u1ee3c g\u00e1n m\u1ed9t gi\u00e1 tr\u1ecb tr\u1ecdng s\u1ed1, cho bi\u1ebft kh\u1ea3 n\u0103ng ho\u1eb7c kh\u1ea3 n\u0103ng x\u1eed l\u00fd l\u01b0u l\u01b0\u1ee3ng c\u1ee7a \u0111\u1ecba ch\u1ec9 \u0111\u00f3. Sau \u0111\u00f3, tr\u00ecnh ph\u00e2n gi\u1ea3i DNS s\u1ebd duy\u1ec7t qua c\u00e1c \u0111\u1ecba ch\u1ec9 IP d\u1ef1a tr\u00ean tr\u1ecdng s\u1ed1 c\u1ee7a ch\u00fang, ph\u00e2n ph\u1ed1i l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp t\u01b0\u01a1ng \u1ee9ng v\u1edbi dung l\u01b0\u1ee3ng c\u1ee7a m\u1ed7i m\u00e1y ch\u1ee7.<\/p>\n

      D\u01b0\u1edbi \u0111\u00e2y l\u00e0 so s\u00e1nh gi\u1eefa hai lo\u1ea1i DNS round-robin:<\/p>\n\n\n\n\n\n\n\n
      T\u00ednh n\u0103ng<\/th>\nV\u00f2ng tr\u00f2n \u0111\u01a1n gi\u1ea3n<\/th>\nV\u00f2ng tr\u00f2n c\u00f3 tr\u1ecdng s\u1ed1<\/th>\n<\/tr>\n<\/thead>\n
      Ph\u00e2n ph\u1ed1i l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp<\/td>\nPh\u00e2n ph\u1ed1i \u0111\u1ed3ng \u0111\u1ec1u gi\u1eefa c\u00e1c m\u00e1y ch\u1ee7<\/td>\nPh\u00e2n ph\u1ed1i theo t\u1ef7 l\u1ec7 d\u1ef1a tr\u00ean tr\u1ecdng s\u1ed1<\/td>\n<\/tr>\n
      C\u1ea5u h\u00ecnh<\/td>\nTr\u1ecdng l\u01b0\u1ee3ng th\u1ed1ng nh\u1ea5t cho t\u1ea5t c\u1ea3 c\u00e1c m\u00e1y ch\u1ee7<\/td>\nTr\u1ecdng l\u01b0\u1ee3ng c\u00f3 th\u1ec3 t\u00f9y ch\u1ec9nh cho t\u1eebng m\u00e1y ch\u1ee7<\/td>\n<\/tr>\n
      Tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng<\/td>\nPh\u00f9 h\u1ee3p khi m\u00e1y ch\u1ee7 c\u00f3 dung l\u01b0\u1ee3ng t\u01b0\u01a1ng t\u1ef1<\/td>\n\u0110\u01b0\u1ee3c \u01b0u ti\u00ean khi m\u00e1y ch\u1ee7 c\u00f3 dung l\u01b0\u1ee3ng kh\u00e1c nhau<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      C\u00e1c c\u00e1ch s\u1eed d\u1ee5ng DNS round-robin, 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

      C\u00e1c c\u00e1ch s\u1eed d\u1ee5ng DNS Round-Robin<\/h3>\n
        \n
      1. \n

        C\u00e2n b\u1eb1ng t\u1ea3i: DNS round-robin th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ph\u00e2n ph\u1ed1i l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp tr\u00ean nhi\u1ec1u m\u00e1y ch\u1ee7 web nh\u1eb1m tr\u00e1nh t\u00ecnh tr\u1ea1ng qu\u00e1 t\u1ea3i v\u00e0 c\u1ea3i thi\u1ec7n th\u1eddi gian ph\u1ea3n h\u1ed3i.<\/p>\n<\/li>\n

      2. \n

        T\u00ednh s\u1eb5n s\u00e0ng cao: B\u1eb1ng c\u00e1ch li\u00ean k\u1ebft nhi\u1ec1u \u0111\u1ecba ch\u1ec9 IP v\u1edbi m\u1ed9t t\u00ean mi\u1ec1n duy nh\u1ea5t, DNS round-robin \u0111\u1ea3m b\u1ea3o r\u1eb1ng n\u1ebfu m\u1ed9t m\u00e1y ch\u1ee7 kh\u00f4ng kh\u1ea3 d\u1ee5ng th\u00ec c\u00e1c m\u00e1y ch\u1ee7 kh\u00e1c c\u00f3 th\u1ec3 x\u1eed l\u00fd c\u00e1c y\u00eau c\u1ea7u \u0111\u1ebfn.<\/p>\n<\/li>\n

      3. \n

        C\u00e2n b\u1eb1ng t\u1ea3i \u0111\u1ecba l\u00fd: DNS round-robin c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 h\u01b0\u1edbng ng\u01b0\u1eddi d\u00f9ng \u0111\u1ebfn c\u00e1c m\u00e1y ch\u1ee7 g\u1ea7n h\u01a1n v\u1ec1 m\u1eb7t \u0111\u1ecba l\u00fd, gi\u1ea3m \u0111\u1ed9 tr\u1ec5 v\u00e0 c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t.<\/p>\n<\/li>\n<\/ol>\n

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

          Thi\u1ebfu m\u1ed1i quan h\u1ec7 phi\u00ean: T\u00ednh n\u0103ng quay v\u00f2ng c\u1ee7a DNS thi\u1ebfu m\u1ed1i quan h\u1ec7 phi\u00ean ho\u1eb7c phi\u00ean c\u1ed1 \u0111\u1ecbnh, ngh\u0129a l\u00e0 c\u00e1c y\u00eau c\u1ea7u li\u00ean ti\u1ebfp t\u1eeb c\u00f9ng m\u1ed9t m\u00e1y kh\u00e1ch c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c chuy\u1ec3n h\u01b0\u1edbng \u0111\u1ebfn c\u00e1c m\u00e1y ch\u1ee7 kh\u00e1c nhau. \u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 duy tr\u00ec phi\u00ean c\u1ee7a ng\u01b0\u1eddi d\u00f9ng, ch\u1eb3ng h\u1ea1n nh\u01b0 m\u1ea5t d\u1eef li\u1ec7u gi\u1ecf h\u00e0ng. C\u00e1c gi\u1ea3i ph\u00e1p cho v\u1ea5n \u0111\u1ec1 n\u00e0y bao g\u1ed3m tri\u1ec3n khai t\u00ednh n\u0103ng duy tr\u00ec phi\u00ean \u1edf c\u1ea5p \u0111\u1ed9 \u1ee9ng d\u1ee5ng ho\u1eb7c c\u00e2n b\u1eb1ng t\u1ea3i.<\/p>\n<\/li>\n

        2. \n

          Ph\u00e2n ph\u1ed1i t\u1ea3i kh\u00f4ng \u0111\u1ed3ng \u0111\u1ec1u: Trong tr\u01b0\u1eddng h\u1ee3p lu\u00e2n chuy\u1ec3n \u0111\u01a1n gi\u1ea3n, c\u00e1c m\u00e1y ch\u1ee7 c\u00f3 dung l\u01b0\u1ee3ng kh\u00e1c nhau s\u1ebd nh\u1eadn \u0111\u01b0\u1ee3c c\u00f9ng m\u1ed9t l\u01b0\u1ee3ng l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp, d\u1eabn \u0111\u1ebfn ph\u00e2n ph\u1ed1i t\u1ea3i kh\u00f4ng hi\u1ec7u qu\u1ea3. V\u00f2ng tr\u00f2n c\u00f3 tr\u1ecdng s\u1ed1 gi\u00fap gi\u1ea3i quy\u1ebft v\u1ea5n \u0111\u1ec1 n\u00e0y b\u1eb1ng c\u00e1ch cho ph\u00e9p qu\u1ea3n tr\u1ecb vi\u00ean ch\u1ec9 \u0111\u1ecbnh c\u00e1c tr\u1ecdng s\u1ed1 kh\u00e1c nhau cho m\u00e1y ch\u1ee7 d\u1ef1a tr\u00ean kh\u1ea3 n\u0103ng c\u1ee7a h\u1ecd.<\/p>\n<\/li>\n

        3. \n

          Gi\u00e1m s\u00e1t t\u00ecnh tr\u1ea1ng m\u00e1y ch\u1ee7: DNS round-robin kh\u00f4ng xem x\u00e9t t\u00ecnh tr\u1ea1ng s\u1ee9c kh\u1ecfe c\u1ee7a m\u00e1y ch\u1ee7. N\u1ebfu m\u00e1y ch\u1ee7 kh\u00f4ng ph\u1ea3n h\u1ed3i ho\u1eb7c ngo\u1ea1i tuy\u1ebfn, DNS s\u1ebd ti\u1ebfp t\u1ee5c \u0111\u1ecbnh tuy\u1ebfn l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp \u0111\u1ebfn m\u00e1y ch\u1ee7 \u0111\u00f3. \u0110\u1ec3 x\u1eed l\u00fd v\u1ea5n \u0111\u1ec1 n\u00e0y, h\u1ec7 th\u1ed1ng gi\u00e1m s\u00e1t v\u00e0 ki\u1ec3m tra t\u00ecnh tr\u1ea1ng b\u00ean ngo\u00e0i c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ph\u00e1t hi\u1ec7n l\u1ed7i m\u00e1y ch\u1ee7 v\u00e0 x\u00f3a \u0111\u1ecba ch\u1ec9 IP b\u1ecb \u1ea3nh h\u01b0\u1edfng kh\u1ecfi ph\u1ea3n h\u1ed3i DNS.<\/p>\n<\/li>\n<\/ol>\n

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

          DNS Round-Robin so v\u1edbi c\u00e2n b\u1eb1ng t\u1ea3i DNS<\/h3>\n

          DNS round-robin v\u00e0 c\u00e2n b\u1eb1ng t\u1ea3i DNS th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng thay th\u1ebf cho nhau, nh\u01b0ng ch\u00fang c\u00f3 nh\u1eefng kh\u00e1c bi\u1ec7t r\u00f5 r\u1ec7t. Trong khi DNS round-robin ph\u00e2n ph\u1ed1i l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp gi\u1eefa nhi\u1ec1u m\u00e1y ch\u1ee7 b\u1eb1ng c\u00e1ch duy\u1ec7t qua danh s\u00e1ch \u0111\u1ecba ch\u1ec9 IP, c\u00e2n b\u1eb1ng t\u1ea3i DNS s\u1eed d\u1ee5ng nhi\u1ec1u thu\u1eadt to\u00e1n kh\u00e1c nhau (v\u00ed d\u1ee5: round-robin, \u00edt k\u1ebft n\u1ed1i nh\u1ea5t, c\u00f3 tr\u1ecdng s\u1ed1) \u0111\u1ec3 \u0111i\u1ec1u h\u01b0\u1edbng l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp m\u1ed9t c\u00e1ch th\u00f4ng minh d\u1ef1a tr\u00ean hi\u1ec7u su\u1ea5t m\u00e1y ch\u1ee7, th\u1eddi gian ph\u1ea3n h\u1ed3i v\u00e0 s\u1ee9c kh\u1ecfe m\u00e1y ch\u1ee7. C\u00e2n b\u1eb1ng t\u1ea3i DNS th\u01b0\u1eddng d\u1ef1a v\u00e0o c\u00e1c b\u1ed9 c\u00e2n b\u1eb1ng t\u1ea3i chuy\u00ean d\u1ee5ng \u0111\u1ec3 qu\u1ea3n l\u00fd ph\u00e2n ph\u1ed1i l\u01b0u l\u01b0\u1ee3ng, cung c\u1ea5p c\u00e1c t\u00ednh n\u0103ng ph\u1ee9c t\u1ea1p h\u01a1n so v\u1edbi DNS round-robin.<\/p>\n

          DNS Round-Robin so v\u1edbi Anycast<\/h3>\n

          Anycast l\u00e0 m\u1ed9t k\u1ef9 thu\u1eadt \u0111\u1ecbnh tuy\u1ebfn m\u1ea1ng kh\u00e1c c\u00f3 nh\u1eefng \u0111i\u1ec3m t\u01b0\u01a1ng \u0111\u1ed3ng v\u1edbi DNS round-robin. Trong Anycast, nhi\u1ec1u m\u00e1y ch\u1ee7 qu\u1ea3ng c\u00e1o c\u00f9ng m\u1ed9t \u0111\u1ecba ch\u1ec9 IP t\u1eeb nhi\u1ec1u v\u1ecb tr\u00ed kh\u00e1c nhau. Khi kh\u00e1ch h\u00e0ng \u0111\u01b0a ra y\u00eau c\u1ea7u t\u1edbi \u0111\u1ecba ch\u1ec9 IP Anycast, m\u1ea1ng s\u1ebd \u0111\u1ecbnh tuy\u1ebfn y\u00eau c\u1ea7u \u0111\u00f3 \u0111\u1ebfn m\u00e1y ch\u1ee7 kh\u1ea3 d\u1ee5ng g\u1ea7n nh\u1ea5t b\u1eb1ng Giao th\u1ee9c c\u1ed5ng bi\u00ean (BGP). Kh\u00f4ng gi\u1ed1ng nh\u01b0 DNS round-robin, Anycast kh\u00f4ng li\u00ean quan \u0111\u1ebfn vi\u1ec7c quay v\u00f2ng qua c\u00e1c \u0111\u1ecba ch\u1ec9 IP; thay v\u00e0o \u0111\u00f3, c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng \u0111\u1ecbnh tuy\u1ebfn s\u1ebd \u0111\u1ea3m nhi\u1ec7m vi\u1ec7c h\u01b0\u1edbng m\u00e1y kh\u00e1ch \u0111\u1ebfn m\u00e1y ch\u1ee7 g\u1ea7n nh\u1ea5t.<\/p>\n

          C\u00e1c quan \u0111i\u1ec3m v\u00e0 c\u00f4ng ngh\u1ec7 trong t\u01b0\u01a1ng lai li\u00ean quan \u0111\u1ebfn DNS round-robin<\/h2>\n

          Khi Internet ti\u1ebfp t\u1ee5c ph\u00e1t tri\u1ec3n, DNS round-robin c\u00f3 th\u1ec3 s\u1ebd duy tr\u00ec m\u1ee9c \u0111\u1ed9 li\u00ean quan c\u1ee7a n\u00f3 nh\u01b0 m\u1ed9t k\u1ef9 thu\u1eadt c\u00e2n b\u1eb1ng t\u1ea3i \u0111\u01a1n gi\u1ea3n v\u00e0 hi\u1ec7u qu\u1ea3 v\u1ec1 m\u1eb7t chi ph\u00ed. Tuy nhi\u00ean, v\u1edbi s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a c\u00e1c d\u1ecbch v\u1ee5 d\u1ef1a tr\u00ean \u0111\u00e1m m\u00e2y v\u00e0 ki\u1ebfn tr\u00fac \u1ee9ng d\u1ee5ng ph\u1ee9c t\u1ea1p h\u01a1n, c\u00e1c t\u1ed5 ch\u1ee9c c\u00f3 th\u1ec3 ng\u00e0y c\u00e0ng l\u1ef1a ch\u1ecdn c\u00e1c gi\u1ea3i ph\u00e1p c\u00e2n b\u1eb1ng t\u1ea3i n\u00e2ng cao, ch\u1eb3ng h\u1ea1n nh\u01b0 qu\u1ea3n l\u00fd l\u01b0u l\u01b0\u1ee3ng to\u00e0n c\u1ea7u d\u1ef1a tr\u00ean DNS v\u00e0 c\u00e2n b\u1eb1ng t\u1ea3i nh\u1eadn bi\u1ebft \u1ee9ng d\u1ee5ng.<\/p>\n

          T\u1ef1 \u0111\u1ed9ng h\u00f3a v\u00e0 t\u00edch h\u1ee3p lu\u00e2n chuy\u1ec3n DNS v\u00e0o n\u1ec1n t\u1ea3ng c\u1ee7a nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 \u0111\u00e1m m\u00e2y c\u00f3 th\u1ec3 s\u1ebd \u0111\u01a1n gi\u1ea3n h\u00f3a vi\u1ec7c thi\u1ebft l\u1eadp v\u00e0 b\u1ea3o tr\u00ec, gi\u00fap ph\u1ea1m vi ng\u01b0\u1eddi d\u00f9ng r\u1ed9ng h\u01a1n c\u00f3 th\u1ec3 truy c\u1eadp d\u1ec5 d\u00e0ng h\u01a1n.<\/p>\n

          C\u00e1ch s\u1eed d\u1ee5ng ho\u1eb7c li\u00ean k\u1ebft m\u00e1y ch\u1ee7 proxy v\u1edbi DNS round-robin<\/h2>\n

          M\u00e1y ch\u1ee7 proxy v\u00e0 DNS lu\u00e2n chuy\u1ec3n c\u00f3 th\u1ec3 b\u1ed5 sung cho nhau \u0111\u1ec3 c\u1ea3i thi\u1ec7n h\u01a1n n\u1eefa hi\u1ec7u su\u1ea5t v\u00e0 \u0111\u1ed9 tin c\u1eady c\u1ee7a d\u1ecbch v\u1ee5 web. M\u00e1y ch\u1ee7 proxy \u0111\u00f3ng vai tr\u00f2 trung gian gi\u1eefa m\u00e1y kh\u00e1ch v\u00e0 m\u00e1y ch\u1ee7 web, thay m\u1eb7t m\u00e1y kh\u00e1ch l\u01b0u tr\u1eef v\u00e0 chuy\u1ec3n ti\u1ebfp c\u00e1c y\u00eau c\u1ea7u. B\u1eb1ng c\u00e1ch t\u00edch h\u1ee3p DNS round-robin v\u1edbi m\u00e1y ch\u1ee7 proxy, c\u00e1c t\u1ed5 ch\u1ee9c c\u00f3 th\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c:<\/p>\n

            \n
          1. \n

            Ph\u00e2n ph\u1ed1i t\u1ea3i: M\u00e1y ch\u1ee7 proxy c\u00f3 th\u1ec3 x\u1eed l\u00fd c\u00e1c y\u00eau c\u1ea7u \u0111\u1ebfn t\u1eeb m\u00e1y kh\u00e1ch v\u00e0 ph\u00e2n ph\u1ed1i l\u01b0u l\u01b0\u1ee3ng gi\u1eefa c\u00e1c m\u00e1y ch\u1ee7 ph\u1ee5 tr\u1ee3 \u0111\u01b0\u1ee3c \u0111\u1ecbnh c\u1ea5u h\u00ecnh b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng DNS round-robin. S\u1ef1 k\u1ebft h\u1ee3p n\u00e0y t\u0103ng c\u01b0\u1eddng kh\u1ea3 n\u0103ng c\u00e2n b\u1eb1ng t\u1ea3i.<\/p>\n<\/li>\n

          2. \n

            B\u1ed9 nh\u1edb \u0111\u1ec7m: Proxy c\u00f3 th\u1ec3 l\u01b0u v\u00e0o b\u1ed9 nh\u1edb \u0111\u1ec7m n\u1ed9i dung \u0111\u01b0\u1ee3c truy c\u1eadp th\u01b0\u1eddng xuy\u00ean, gi\u1ea3m t\u1ea3i cho m\u00e1y ch\u1ee7 ph\u1ee5 tr\u1ee3 v\u00e0 c\u1ea3i thi\u1ec7n th\u1eddi gian ph\u1ea3n h\u1ed3i cho m\u00e1y kh\u00e1ch.<\/p>\n<\/li>\n

          3. \n

            \u0110\u1ecbnh tuy\u1ebfn d\u1ef1a tr\u00ean v\u1ecb tr\u00ed \u0111\u1ecba l\u00fd: M\u00e1y ch\u1ee7 proxy c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng DNS round-robin \u0111\u1ec3 h\u01b0\u1edbng m\u00e1y kh\u00e1ch \u0111\u1ebfn c\u00e1c m\u00e1y ch\u1ee7 ph\u1ee5 tr\u1ee3 g\u1ea7n h\u01a1n v\u1ec1 m\u1eb7t \u0111\u1ecba l\u00fd, c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t t\u1ed5ng th\u1ec3.<\/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 DNS round-robin, b\u1ea1n c\u00f3 th\u1ec3 kh\u00e1m ph\u00e1 c\u00e1c t\u00e0i nguy\u00ean sau:<\/p>\n

              \n
            1. RFC 970: Tr\u00ean chuy\u1ec3n m\u1ea1ch g\u00f3i v\u1edbi b\u1ed9 nh\u1edb v\u00f4 h\u1ea1n<\/a><\/li>\n
            2. RFC 1794: H\u1ed7 tr\u1ee3 DNS \u0111\u1ec3 c\u00e2n b\u1eb1ng t\u1ea3i<\/a><\/li>\n
            3. Gi\u1edbi thi\u1ec7u v\u1ec1 c\u00e2n b\u1eb1ng t\u1ea3i DNS<\/a><\/li>\n
            4. C\u00e2n b\u1eb1ng t\u1ea3i Anycast so v\u1edbi DNS<\/a><\/li>\n<\/ol>\n

              H\u00e3y nh\u1edb r\u1eb1ng DNS round-robin ch\u1ec9 l\u00e0 m\u1ed9t trong nhi\u1ec1u k\u1ef9 thu\u1eadt c\u00e2n b\u1eb1ng t\u1ea3i c\u00f3 s\u1eb5n. T\u00f9y thu\u1ed9c v\u00e0o y\u00eau c\u1ea7u v\u00e0 tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng c\u1ee5 th\u1ec3 c\u1ee7a b\u1ea1n, c\u00e1c ph\u01b0\u01a1ng ph\u00e1p c\u00e2n b\u1eb1ng t\u1ea3i kh\u00e1c, ch\u1eb3ng h\u1ea1n nh\u01b0 b\u1ed9 c\u00e2n b\u1eb1ng t\u1ea3i d\u1ef1a tr\u00ean m\u00e1y ch\u1ee7 v\u00e0 b\u1ed9 \u0111i\u1ec1u khi\u1ec3n ph\u00e2n ph\u1ed1i \u1ee9ng d\u1ee5ng, c\u00f3 th\u1ec3 ph\u00f9 h\u1ee3p h\u01a1n. Lu\u00f4n xem x\u00e9t c\u00e1c nhu c\u1ea7u ri\u00eang bi\u1ec7t c\u1ee7a c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng v\u00e0 tham kh\u1ea3o \u00fd ki\u1ebfn c\u1ee7a c\u00e1c chuy\u00ean gia CNTT \u0111\u1ec3 tri\u1ec3n khai gi\u1ea3i ph\u00e1p t\u1ed1t nh\u1ea5t cho t\u1ed5 ch\u1ee9c c\u1ee7a b\u1ea1n.<\/p>","protected":false},"featured_media":476934,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-476933","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about DNS Round-Robin: A Comprehensive Guide<\/mark>","faq_items":[{"question":"What is DNS round-robin and how does it work?<\/strong>","answer":"

              DNS round-robin is a load balancing technique that distributes incoming network traffic across multiple servers in a rotating manner. When a client requests the IP address for a domain, DNS returns one of the IP addresses associated with the domain in a sequential order. Subsequent requests from other clients receive different IP addresses from the pool, ensuring even distribution of traffic among the servers.<\/p>"},{"question":"Where did DNS round-robin originate, and when was it first mentioned?<\/strong>","answer":"

              The concept of DNS round-robin dates back to the early days of the Internet. The first mention of DNS round-robin can be traced back to RFC 970, published in 1985, which introduced the idea of multiple IP addresses associated with a single domain.<\/p>"},{"question":"What are the main features and benefits of DNS round-robin?<\/strong>","answer":"

              DNS round-robin offers several key features:<\/p>

              1. Load Distribution:<\/strong> It evenly distributes incoming traffic among multiple servers, preventing overloading of any single server.<\/li>
              2. High Availability:<\/strong> By associating multiple servers with a domain, it ensures redundancy and fault tolerance.<\/li>
              3. Ease of Implementation:<\/strong> Setting up DNS round-robin is simple, requiring only multiple A records in the DNS zone file.<\/li>
              4. Cost-Effectiveness:<\/strong> DNS round-robin doesn't require specialized hardware or software, making it a cost-effective solution.<\/li><\/ol>"},{"question":"What are the different types of DNS round-robin?<\/strong>","answer":"

                There are two primary types of DNS round-robin:<\/p>

                1. Simple Round-Robin:<\/strong> It treats all IP addresses equally and cycles through them sequentially.<\/li>
                2. Weighted Round-Robin:<\/strong> It assigns priority to IP addresses based on weights, distributing traffic proportionally to server capacities.<\/li><\/ol>"},{"question":"How can DNS round-robin be used, and what problems may arise?<\/strong>","answer":"

                  DNS round-robin can be used for:<\/p>

                  1. Load Balancing:<\/strong> Distributing traffic across multiple servers.<\/li>
                  2. High Availability:<\/strong> Ensuring server redundancy.<\/li>
                  3. Geographic Load Balancing:<\/strong> Directing clients to nearby servers.<\/li><\/ol>

                    Common problems include:<\/p>

                    1. Lack of Session Affinity:<\/strong> Consecutive requests from the same client may reach different servers.<\/li>
                    2. Uneven Load Distribution:<\/strong> Servers with varying capacities may receive the same amount of traffic.<\/li>
                    3. Server Health Monitoring:<\/strong> Unresponsive servers may still receive traffic.<\/li><\/ol>"},{"question":"How does DNS round-robin compare to DNS load balancing and Anycast?<\/strong>","answer":"

                      DNS round-robin distributes traffic by cycling through a list of IP addresses, while DNS load balancing uses algorithms to intelligently direct traffic based on server performance. Anycast involves advertising the same IP address from multiple locations, routing clients to the nearest server using BGP.<\/p>"},{"question":"How can proxy servers be associated with DNS round-robin?<\/strong>","answer":"

                      Proxy servers can work with DNS round-robin to:<\/p>

                      1. Load Distribution:<\/strong> Handle incoming requests and distribute traffic among backend servers.<\/li>
                      2. Caching:<\/strong> Cache frequently accessed content, improving response times.<\/li>
                      3. Geolocation-based Routing:<\/strong> Use DNS round-robin to direct clients to geographically closer servers.<\/li><\/ol>"},{"question":"What can I expect in the future regarding DNS round-robin and load balancing?<\/strong>","answer":"

                        DNS round-robin is likely to maintain its relevance as a simple and cost-effective load balancing technique. However, more advanced load balancing solutions, integrated with cloud services and application-aware algorithms, may become popular for complex architectures.<\/p>"},{"question":"Where can I find more information about DNS round-robin?<\/strong>","answer":"

                        For more details, check out these resources:<\/p>

                        1. RFC 970: On Packet Switches With Infinite Storage<\/a><\/li>
                        2. RFC 1794: DNS Support for Load Balancing<\/a><\/li>
                        3. Introduction to DNS Load Balancing<\/a><\/li>
                        4. Anycast vs. DNS Load Balancing<\/a><\/li><\/ol>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/476933","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\/476933\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media\/476934"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media?parent=476933"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}