{"id":1176,"date":"2023-05-28T02:28:44","date_gmt":"2023-05-27T18:28:44","guid":{"rendered":"https:\/\/xinchewhd.com.cn\/?p=1176"},"modified":"2023-05-28T02:28:44","modified_gmt":"2023-05-27T18:28:44","slug":"kafka-%e6%a0%b8%e5%bf%83%e5%85%a8%e9%9d%a2%e6%80%bb%e7%bb%93%ef%bc%8c%e9%ab%98%e5%8f%af%e9%9d%a0%e9%ab%98%e6%80%a7%e8%83%bd%e6%a0%b8%e5%bf%83%e5%8e%9f%e7%90%86%e6%8e%a2%e7%a9%b6","status":"publish","type":"post","link":"https:\/\/xinchewhd.com.cn\/index.php\/kafka\/kafka-%e6%a0%b8%e5%bf%83%e5%85%a8%e9%9d%a2%e6%80%bb%e7%bb%93%ef%bc%8c%e9%ab%98%e5%8f%af%e9%9d%a0%e9%ab%98%e6%80%a7%e8%83%bd%e6%a0%b8%e5%bf%83%e5%8e%9f%e7%90%86%e6%8e%a2%e7%a9%b6\/","title":{"rendered":"Kafka \u6838\u5fc3\u5168\u9762\u603b\u7ed3\uff0c\u9ad8\u53ef\u9760\u9ad8\u6027\u80fd\u6838\u5fc3\u539f\u7406\u63a2\u7a76"},"content":{"rendered":"
\n
<\/mp-common-profile><\/section>\n

\u5f15\u8a00<\/span><\/h3>\n

\u5728\u63a2\u7a76 Kafka \u6838\u5fc3\u77e5\u8bc6\u4e4b\u524d\uff0c\u6211\u4eec\u5148\u601d\u8003\u4e00\u4e2a\u95ee\u9898\uff1a\u4ec0\u4e48\u573a\u666f\u4f1a\u4fc3\u4f7f\u6211\u4eec\u4f7f\u7528 Kafka?  \u8bf4\u5230\u8fd9\u91cc\uff0c\u6211\u4eec\u5934\u8111\u4e2d\u6216\u591a\u6216\u5c11\u4f1a\u8e66\u51fa<\/strong>\u5f02\u6b65\u89e3\u8026\u548c<\/strong>\u524a\u5cf0\u586b\u8c37\u7b49\u5b57\u6837\uff0c\u662f\u7684\uff0c\u8fd9\u5c31\u662f Kafka \u6700\u91cd\u8981\u7684\u843d\u5730\u573a\u666f\u3002<\/p>\n

    \n
  • \n
    \n

    \u5f02\u6b65\u89e3\u8026<\/strong>\uff1a\u540c\u6b65\u8c03\u7528\u8f6c\u6362\u6210\u5f02\u6b65\u6d88\u606f\u901a\u77e5\uff0c\u5b9e\u73b0\u751f\u4ea7\u8005\u548c\u6d88\u8d39\u8005\u7684\u89e3\u8026\u3002\u60f3\u8c61\u4e00\u4e2a\u573a\u666f\uff0c\u5728\u5546\u54c1\u4ea4\u6613\u65f6\uff0c\u5728\u8ba2\u5355\u521b\u5efa\u5b8c\u6210\u4e4b\u540e\uff0c\u9700\u8981\u89e6\u53d1\u4e00\u7cfb\u5217\u5176\u4ed6\u7684\u64cd\u4f5c\uff0c\u6bd4\u5982\u8fdb\u884c\u7528\u6237\u8ba2\u5355\u6570\u636e\u7684\u7edf\u8ba1\u3001\u7ed9\u7528\u6237\u53d1\u9001\u77ed\u4fe1\u3001\u7ed9\u7528\u6237\u53d1\u9001\u90ae\u4ef6\u7b49\u7b49\u3002\u5982\u679c\u6240\u6709\u64cd\u4f5c\u90fd\u91c7\u7528\u540c\u6b65\u65b9\u5f0f\u5b9e\u73b0\uff0c\u5c06\u4e25\u91cd\u5f71\u54cd\u7cfb\u7edf\u6027\u80fd\u3002\u9488\u5bf9\u6b64\u573a\u666f\uff0c\u6211\u4eec\u53ef\u4ee5\u5229\u7528\u6d88\u606f\u4e2d\u95f4\u4ef6\u89e3\u8026\u8ba2\u5355\u521b\u5efa\u64cd\u4f5c\u548c\u5176\u4ed6\u540e\u7eed\u884c\u4e3a\u3002<\/p>\n<\/section>\n<\/li>\n

  • \n
    \n

    \u524a\u5cf0\u586b\u8c37<\/strong>\uff1a\u5229\u7528 broker \u7f13\u51b2\u4e0a\u6e38\u751f\u4ea7\u8005\u77ac\u65f6\u7a81\u53d1\u7684\u6d41\u91cf\uff0c\u4f7f\u6d88\u8d39\u8005\u6d88\u8d39\u6d41\u91cf\u6574\u4f53\u5e73\u6ed1\u3002\u5bf9\u4e8e\u53d1\u9001\u80fd\u529b\u5f88\u5f3a\u7684\u4e0a\u6e38\u7cfb\u7edf\uff0c\u5982\u679c\u6ca1\u6709\u6d88\u606f\u4e2d\u95f4\u4ef6\u7684\u4fdd\u62a4\uff0c\u4e0b\u6e38\u7cfb\u7edf\u53ef\u80fd\u4f1a\u76f4\u63a5\u88ab\u538b\u57ae\u5bfc\u81f4\u5168\u94fe\u8def\u670d\u52a1\u96ea\u5d29\u3002\u60f3\u8c61\u79d2\u6740\u4e1a\u52a1\u573a\u666f\uff0c\u4e0a\u6e38\u4e1a\u52a1\u53d1\u8d77\u4e0b\u5355\u8bf7\u6c42\uff0c\u4e0b\u6e38\u4e1a\u52a1\u6267\u884c\u79d2\u6740\u4e1a\u52a1\uff08\u5e93\u5b58\u68c0\u67e5\uff0c\u5e93\u5b58\u51bb\u7ed3\uff0c\u4f59\u989d\u51bb\u7ed3\uff0c\u751f\u6210\u8ba2\u5355\u7b49\u7b49\uff09\uff0c\u4e0b\u6e38\u4e1a\u52a1\u5904\u7406\u7684\u903b\u8f91\u662f\u76f8\u5f53\u590d\u6742\u7684\uff0c\u5e76\u53d1\u80fd\u529b\u6709\u9650\uff0c\u5982\u679c\u4e0a\u6e38\u670d\u52a1\u4e0d\u505a\u9650\u6d41\u7b56\u7565\uff0c\u77ac\u65f6\u53ef\u80fd\u628a\u4e0b\u6e38\u670d\u52a1\u538b\u57ae\u3002\u9488\u5bf9\u6b64\u573a\u666f\uff0c\u6211\u4eec\u53ef\u4ee5\u5229\u7528 MQ \u6765\u505a\u524a\u5cf0\u586b\u8c37\uff0c\u8ba9\u9ad8\u5cf0\u6d41\u91cf\u586b\u5145\u4f4e\u8c37\u7a7a\u95f2\u8d44\u6e90\uff0c\u8fbe\u5230\u7cfb\u7edf\u8d44\u6e90\u7684\u5408\u7406\u5229\u7528\u3002<\/p>\n<\/section>\n<\/li>\n<\/ul>\n

    \u901a\u8fc7\u4e0a\u8ff0\u4f8b\u5b50\u53ef\u4ee5\u53d1\u73b0\u4ea4\u6613\u3001\u652f\u4ed8\u7b49\u573a\u666f\u5e38\u9700\u8981\u5f02\u6b65\u89e3\u8026<\/strong>\u548c\u524a\u5cf0\u586b\u8c37<\/strong>\u529f\u80fd\u89e3\u51b3\u95ee\u9898\uff0c\u800c\u4ea4\u6613\u3001\u652f\u4ed8\u7b49\u573a\u666f\u5bf9\u6027\u80fd\u3001\u53ef\u9760\u6027\u8981\u6c42\u7279\u522b\u9ad8\u3002\u90a3\u4e48\uff0c\u6211\u4eec\u672c\u6587\u7684\u4e3b\u89d2 Kafka \u80fd\u5426\u6ee1\u8db3\u76f8\u5e94\u8981\u6c42\u5462\uff1f\u4e0b\u9762\u6211\u4eec\u6765\u63a2\u8ba8\u4e0b\u3002<\/p>\n

    Kafka \u5b8f\u89c2\u8ba4\u77e5<\/h4>\n

    \u5728\u63a2\u7a76 Kafka \u7684\u9ad8\u6027\u80fd\u3001\u9ad8\u53ef\u9760\u6027\u4e4b\u524d\uff0c\u6211\u4eec\u4ece\u5b8f\u89c2\u4e0a\u6765\u770b\u4e0b Kafka \u7684\u7cfb\u7edf\u67b6\u6784\uff1a<\/p>\n

    \u5982\u4e0a\u56fe\u6240\u793a\uff0cKafka \u7531 Producer\u3001Broker\u3001Consumer \u4ee5\u53ca\u8d1f\u8d23\u96c6\u7fa4\u7ba1\u7406\u7684 ZooKeeper \u7ec4\u6210\uff0c\u5404\u90e8\u5206\u529f\u80fd\u5982\u4e0b\uff1a<\/p>\n

      \n
    • \n
      Producer<\/strong>\uff1a\u751f\u4ea7\u8005\uff0c\u8d1f\u8d23\u6d88\u606f\u7684\u521b\u5efa\u5e76\u901a\u8fc7\u4e00\u5b9a\u7684\u8def\u7531\u7b56\u7565\u53d1\u9001\u6d88\u606f\u5230\u5408\u9002\u7684 Broker\uff1b<\/section>\n<\/li>\n
    • \n
      Broker<\/strong>\uff1a\u670d\u52a1\u5b9e\u4f8b\uff0c\u8d1f\u8d23\u6d88\u606f\u7684\u6301\u4e45\u5316\u3001\u4e2d\u8f6c\u7b49\u529f\u80fd\uff1b<\/section>\n<\/li>\n
    • \n
      Consumer<\/strong> \uff1a\u6d88\u8d39\u8005\uff0c\u8d1f\u8d23\u4ece Broker \u4e2d\u62c9\u53d6\uff08Pull\uff09\u8ba2\u9605\u7684\u6d88\u606f\u5e76\u8fdb\u884c\u6d88\u8d39\uff0c\u901a\u5e38\u591a\u4e2a\u6d88\u8d39\u8005\u6784\u6210\u4e00\u4e2a\u5206\u7ec4\uff0c\u6d88\u606f\u53ea\u80fd\u88ab\u540c\u7ec4\u4e2d\u7684\u4e00\u4e2a\u6d88\u8d39\u8005\u6d88\u8d39\uff1b<\/section>\n<\/li>\n
    • \n
      ZooKeeper<\/strong>\uff1a\u8d1f\u8d23 broker\u3001consumer \u96c6\u7fa4\u5143\u6570\u636e\u7684\u7ba1\u7406\u7b49\uff1b\uff08\u6ce8\u610f\uff1aProducer \u7aef\u76f4\u63a5\u8fde\u63a5 broker\uff0c\u4e0d\u5728 zk \u4e0a\u5b58\u4efb\u4f55\u6570\u636e\uff0c\u53ea\u662f\u901a\u8fc7 ZK \u76d1\u542c broker \u548c topic \u7b49\u4fe1\u606f<\/strong>\uff09<\/section>\n<\/li>\n<\/ul>\n

      \u4e0a\u56fe\u6d88\u606f\u6d41\u8f6c\u8fc7\u7a0b\u4e2d\uff0c\u8fd8\u6709\u51e0\u4e2a\u7279\u522b\u91cd\u8981\u7684\u6982\u5ff5\u2014\u4e3b\u9898\uff08Topic\uff09\u3001\u5206\u533a\uff08Partition\uff09\u3001\u5206\u6bb5(segment)\u3001\u4f4d\u79fb\uff08offset\uff09\u3002<\/p>\n

        \n
      • \n
        topic<\/strong>\uff1a\u6d88\u606f\u4e3b\u9898\u3002Kafka \u6309 topic \u5bf9\u6d88\u606f\u8fdb\u884c\u5206\u7c7b\uff0c\u6211\u4eec\u5728\u6536\u53d1\u6d88\u606f\u65f6\u53ea\u9700\u6307\u5b9a topic\u3002<\/section>\n<\/li>\n
      • \n
        partition<\/strong>\uff1a\u5206\u533a\u3002\u4e3a\u4e86\u63d0\u5347\u7cfb\u7edf\u7684\u541e\u5410\uff0c\u4e00\u4e2a topic \u4e0b\u901a\u5e38\u6709\u591a\u4e2a partition\uff0cpartition \u5206\u5e03\u5728\u4e0d\u540c\u7684 Broker \u4e0a\uff0c\u7528\u4e8e\u5b58\u50a8 topic \u7684\u6d88\u606f\uff0c\u8fd9\u4f7f Kafka \u53ef\u4ee5\u5728\u591a\u53f0\u673a\u5668\u4e0a\u5904\u7406\u3001\u5b58\u50a8\u6d88\u606f\uff0c\u7ed9 kafka \u63d0\u4f9b\u7ed9\u4e86\u5e76\u884c\u7684\u6d88\u606f\u5904\u7406\u80fd\u529b\u548c\u6a2a\u5411\u6269\u5bb9\u80fd\u529b\u3002\u53e6\u5916\uff0c\u4e3a\u4e86\u63d0\u5347\u7cfb\u7edf\u7684\u53ef\u9760\u6027\uff0cpartition \u901a\u5e38\u4f1a\u5206\u7ec4\uff0c\u4e14\u6bcf\u7ec4\u6709\u4e00\u4e2a\u4e3b partition\u3001\u591a\u4e2a\u526f\u672c partition\uff0c\u4e14\u5206\u5e03\u5728\u4e0d\u540c\u7684 broker \u4e0a\uff0c\u4ece\u800c\u8d77\u5230\u5bb9\u707e<\/strong>\u7684\u4f5c\u7528\u3002<\/section>\n<\/li>\n
      • \n
        segment<\/strong>\uff1a\u5206\u6bb5\u3002\u5b8f\u89c2\u4e0a\u770b\uff0c\u4e00\u4e2a partition \u5bf9\u5e94\u4e00\u4e2a\u65e5\u5fd7\uff08Log\uff09\u3002\u7531\u4e8e\u751f\u4ea7\u8005\u751f\u4ea7\u7684\u6d88\u606f\u4f1a\u4e0d\u65ad\u8ffd\u52a0\u5230 log \u6587\u4ef6\u672b\u5c3e<\/strong>\uff0c\u4e3a\u9632\u6b62 log \u6587\u4ef6\u8fc7\u5927\u5bfc\u81f4\u6570\u636e\u68c0\u7d22\u6548\u7387\u4f4e\u4e0b\uff0cKafka \u91c7\u53d6\u4e86\u5206\u6bb5\u548c\u7d22\u5f15\u673a\u5236\uff0c\u5c06\u6bcf\u4e2a partition \u5206\u4e3a\u591a\u4e2a segment\uff0c\u540c\u65f6\u4e5f\u4fbf\u4e8e\u6d88\u606f\u7684\u7ef4\u62a4\u548c\u6e05\u7406<\/strong>\u3002\u6bcf\u4e2a segment \u5305\u542b\u4e00\u4e2a.log \u65e5\u5fd7\u6587\u4ef6\u3001\u4e24\u4e2a\u7d22\u5f15(.index\u3001timeindex)\u6587\u4ef6\u4ee5\u53ca\u5176\u4ed6\u53ef\u80fd\u7684\u6587\u4ef6\u3002\u6bcf\u4e2a Segment \u7684\u6570\u636e\u6587\u4ef6\u4ee5\u8be5\u6bb5\u4e2d\u6700\u5c0f\u7684 offset \u4e3a\u6587\u4ef6\u540d\uff0c\u5f53\u67e5\u627e offset \u7684 Message \u7684\u65f6\u5019\uff0c\u901a\u8fc7\u4e8c\u5206\u67e5\u627e\u5feb\u627e\u5230 Message \u6240\u5904\u4e8e\u7684 Segment \u4e2d\u3002<\/section>\n<\/li>\n
      • \n
        offset<\/strong>\uff1a\u6d88\u606f\u5728\u65e5\u5fd7\u4e2d\u7684\u4f4d\u7f6e\uff0c\u6d88\u606f\u5728\u88ab\u8ffd\u52a0\u5230\u5206\u533a\u65e5\u5fd7\u6587\u4ef6\u7684\u65f6\u5019\u90fd\u4f1a\u5206\u914d\u4e00\u4e2a\u7279\u5b9a\u7684\u504f\u79fb\u91cf\u3002offset \u662f\u6d88\u606f\u5728\u5206\u533a\u4e2d\u7684\u552f\u4e00\u6807\u8bc6\uff0c\u662f\u4e00\u4e2a\u5355\u8c03\u9012\u589e\u4e14\u4e0d\u53d8\u7684\u503c\u3002Kafka \u901a\u8fc7\u5b83\u6765\u4fdd\u8bc1\u6d88\u606f\u5728\u5206\u533a\u5185\u7684\u987a\u5e8f\u6027\uff0c\u4e0d\u8fc7 offset \u5e76\u4e0d\u8de8\u8d8a\u5206\u533a\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0cKafka \u4fdd\u8bc1\u7684\u662f\u5206\u533a\u6709\u5e8f\u800c\u4e0d\u662f\u4e3b\u9898\u6709\u5e8f<\/strong>\u3002<\/section>\n

        <\/section>\n<\/li>\n<\/ul>\n

        Kafka \u9ad8\u53ef\u9760\u6027\u3001\u9ad8\u6027\u80fd\u63a2\u7a76<\/span><\/h3>\n

        \u5728\u5bf9 Kafka \u7684\u6574\u4f53\u7cfb\u7edf\u6846\u67b6\u53ca\u76f8\u5173\u6982\u5ff5\u7b80\u5355\u4e86\u89e3\u540e\uff0c\u4e0b\u9762\u6211\u4eec\u6765\u8fdb\u4e00\u6b65\u6df1\u5165\u63a2\u8ba8\u4e0b\u9ad8\u53ef\u9760\u6027\u3001\u9ad8\u6027\u80fd\u5b9e\u73b0\u539f\u7406\u3002<\/p>\n

        Kafka \u9ad8\u53ef\u9760\u6027\u63a2\u7a76<\/h4>\n

        Kafka \u9ad8\u53ef\u9760\u6027\u7684\u6838\u5fc3\u662f\u4fdd\u8bc1\u6d88\u606f\u5728\u4f20\u9012\u8fc7\u7a0b\u4e2d\u4e0d\u4e22\u5931\uff0c\u6d89\u53ca\u5982\u4e0b\u6838\u5fc3\u73af\u8282\uff1a<\/p>\n

          \n
        • \n
          \u6d88\u606f\u4ece\u751f\u4ea7\u8005\u53ef\u9760\u5730\u53d1\u9001\u81f3 Broker\uff1b-- \u7f51\u7edc\u3001\u672c\u5730\u4e22\u6570\u636e\uff1b<\/section>\n<\/li>\n
        • \n
          \u53d1\u9001\u5230 Broker \u7684\u6d88\u606f\u53ef\u9760\u6301\u4e45\u5316\uff1b-- Pagecache \u7f13\u5b58\u843d\u76d8\u3001\u5355\u70b9\u5d29\u6e83\u3001\u4e3b\u4ece\u540c\u6b65\u8de8\u7f51\u7edc\uff1b<\/section>\n<\/li>\n
        • \n
          \u6d88\u8d39\u8005\u4ece Broker \u6d88\u8d39\u5230\u6d88\u606f\u4e14\u6700\u597d\u53ea\u6d88\u8d39\u4e00\u6b21 -- \u8de8\u7f51\u7edc\u6d88\u606f\u4f20\u8f93 \u3002<\/section>\n<\/li>\n<\/ul>\n
          \u6d88\u606f\u4ece\u751f\u4ea7\u8005\u53ef\u9760\u5730\u53d1\u9001\u81f3 Broker<\/strong><\/span><\/h5>\n

          \u4e3a\u4e86\u4fdd\u969c\u6d88\u606f\u4ece\u751f\u4ea7\u8005\u53ef\u9760\u5730\u53d1\u9001\u81f3 Broker\uff0c\u6211\u4eec\u9700\u8981\u786e\u4fdd\u4e24\u70b9\uff1b<\/p>\n

            \n
          1. \n
            Producer \u53d1\u9001\u6d88\u606f\u540e\uff0c\u80fd\u591f\u6536\u5230\u6765\u81ea Broker \u7684\u6d88\u606f\u4fdd\u5b58\u6210\u529f ack\uff1b<\/section>\n<\/li>\n
          2. \n
            Producer \u53d1\u9001\u6d88\u606f\u540e\uff0c\u80fd\u591f\u6355\u83b7\u8d85\u65f6\u3001\u5931\u8d25 ack \u7b49\u5f02\u5e38 ack \u5e76\u505a\u5904\u7406\u3002<\/section>\n<\/li>\n<\/ol>\n
            ack \u7b56\u7565<\/span><\/h6>\n

            \u9488\u5bf9\u95ee\u9898 1\uff0cKafka \u4e3a\u6211\u4eec\u63d0\u4f9b\u4e86\u4e09\u79cd ack \u7b56\u7565\uff0c<\/p>\n

              \n
            • \n
              Request.required.acks = 0\uff1a\u8bf7\u6c42\u53d1\u9001\u5373\u8ba4\u4e3a\u6210\u529f\uff0c\u4e0d\u5173\u5fc3\u6709\u6ca1\u6709\u5199\u6210\u529f\uff0c\u5e38\u7528\u4e8e\u65e5\u5fd7\u8fdb\u884c\u5206\u6790\u573a\u666f\uff1b<\/section>\n<\/li>\n
            • \n
              Request.required.acks = 1\uff1a\u5f53 leader partition \u5199\u5165\u6210\u529f\u4ee5\u540e\uff0c\u624d\u7b97\u5199\u5165\u6210\u529f\uff0c\u6709\u4e22\u6570\u636e\u7684\u53ef\u80fd\uff1b<\/section>\n<\/li>\n
            • \n
              Request.required.acks= -1\uff1aISR \u5217\u8868\u91cc\u9762\u7684\u6240\u6709\u526f\u672c\u90fd\u5199\u5b8c\u4ee5\u540e\uff0c\u8fd9\u6761\u6d88\u606f\u624d\u7b97\u5199\u5165\u6210\u529f\uff0c\u5f3a\u53ef\u9760\u6027\u4fdd\u8bc1\uff1b<\/section>\n<\/li>\n<\/ul>\n

              \u4e3a\u4e86\u5b9e\u73b0\u5f3a\u53ef\u9760\u7684 kafka \u7cfb\u7edf\uff0c\u6211\u4eec\u9700\u8981\u8bbe\u7f6e Request.required.acks= -1\uff0c\u540c\u65f6\u8fd8\u4f1a\u8bbe\u7f6e\u96c6\u7fa4\u4e2d\u5904\u4e8e\u6b63\u5e38\u540c\u6b65\u72b6\u6001\u7684\u526f\u672c follower \u6570\u91cf min.insync.replicas>2\uff0c\u53e6\u5916\uff0c\u8bbe\u7f6e unclean.leader.election.enable=false \u4f7f\u5f97\u96c6\u7fa4\u4e2d ISR \u7684 follower \u624d\u53ef\u53d8\u6210\u65b0\u7684 leader\uff0c\u907f\u514d\u7279\u6b8a\u60c5\u51b5\u4e0b\u6d88\u606f\u622a\u65ad\u7684\u51fa\u73b0\u3002<\/p>\n

              \u6d88\u606f\u53d1\u9001\u7b56\u7565<\/span><\/h6>\n

              \u9488\u5bf9\u95ee\u9898 2\uff0ckafka \u63d0\u4f9b\u4e24\u7c7b\u6d88\u606f\u53d1\u9001\u65b9\u5f0f\uff1a\u540c\u6b65\uff08sync\uff09\u53d1\u9001\u548c\u5f02\u6b65\uff08async\uff09\u53d1\u9001\uff0c\u76f8\u5173\u53c2\u6570\u5982\u4e0b\uff1a<\/p>\n

              \u4ee5 sarama \u5b9e\u73b0\u4e3a\u4f8b\uff0c\u5728\u6d88\u606f\u53d1\u9001\u7684\u8fc7\u7a0b\u4e2d\uff0c\u65e0\u8bba\u662f\u540c\u6b65\u53d1\u9001\u8fd8\u662f\u5f02\u6b65\u53d1\u9001\u90fd\u4f1a\u6d89\u53ca\u5230\u4e24\u4e2a\u534f\u7a0b--\u8d1f\u8d23\u6d88\u606f\u53d1\u9001\u7684\u4e3b\u534f\u7a0b\u548c\u8d1f\u8d23\u6d88\u606f\u5206\u53d1\u7684 dispatcher \u534f\u7a0b\u3002<\/p>\n

              \u5f02\u6b65\u53d1\u9001<\/strong><\/p>\n

              \u5bf9\u4e8e\u5f02\u6b65\u53d1\u9001(ack != 0 \u573a\u666f\uff0c\u7b49\u4e8e 0 \u65f6\u4e0d\u5173\u5fc3\u5199 kafka \u7ed3\u679c\uff0c\u540e\u6587\u8be6\u7ec6\u8bb2\u89e3)\u800c\u8a00\uff0c\u5176\u6d41\u7a0b\u5927\u6982\u5982\u4e0b\uff1a<\/p>\n

                \n
              1. \n
                \u5728\u4e3b\u534f\u7a0b<\/strong>\u4e2d\u8c03\u7528\u5f02\u6b65\u53d1\u9001 kafka \u6d88\u606f\u7684\u65f6\u5019\uff0c\u5176\u672c\u8d28\u662f\u5c06\u6d88\u606f\u4f53\u653e\u8fdb\u4e86\u4e00\u4e2a input \u7684 channel\uff0c\u53ea\u8981\u5165 channel \u6210\u529f\uff0c\u5219\u8fd9\u4e2a\u51fd\u6570\u76f4\u63a5\u8fd4\u56de\uff0c\u4e0d\u4f1a\u4ea7\u751f\u4efb\u4f55\u963b\u585e\u3002\u76f8\u53cd\uff0c\u5982\u679c\u5165 channel \u5931\u8d25\uff0c\u5219\u4f1a\u8fd4\u56de\u9519\u8bef\u4fe1\u606f\u3002\u56e0\u6b64\u8c03\u7528 async \u5199\u5165\u7684\u65f6\u5019\u8fd4\u56de\u7684\u9519\u8bef\u4fe1\u606f\u662f\u5165 channel \u7684\u9519\u8bef\u4fe1\u606f\uff0c\u81f3\u4e8e\u5177\u4f53\u6700\u7ec8\u6d88\u606f\u6709\u6ca1\u6709\u53d1\u9001\u5230 kafka \u7684 broker\uff0c\u6211\u4eec\u65e0\u6cd5\u4ece\u8fd4\u56de\u503c\u5f97\u77e5\u3002<\/section>\n<\/li>\n
              2. \n
                \u5f53\u6d88\u606f\u8fdb\u5165 input \u7684 channel \u540e\uff0c\u4f1a\u6709\u53e6\u4e00\u4e2adispatcher \u7684\u534f\u7a0b<\/strong>\u8d1f\u8d23\u904d\u5386 input\uff0c\u6765\u771f\u6b63\u53d1\u9001\u6d88\u606f\u5230\u7279\u5b9a Broker \u4e0a\u7684\u4e3b Partition \u4e0a\u3002\u53d1\u9001\u7ed3\u679c\u901a\u8fc7\u4e00\u4e2a\u5f02\u6b65\u534f\u7a0b<\/strong>\u8fdb\u884c\u76d1\u542c\uff0c\u5faa\u73af\u5904\u7406 err channel \u548c success channel\uff0c\u51fa\u73b0\u4e86 error \u5c31\u8bb0\u4e00\u4e2a\u65e5\u5fd7\u3002\u56e0\u6b64\u5f02\u6b65\u5199\u5165\u573a\u666f\u65f6\uff0c\u5199 kafka \u7684\u9519\u8bef\u4fe1\u606f\uff0c\u6211\u4eec\u6682\u65f6\u4ec5\u80fd\u591f\u4ece\u8fd9\u4e2a\u9519\u8bef\u65e5\u5fd7\u6765\u5f97\u77e5\u5177\u4f53\u53d1\u751f\u4e86\u4ec0\u4e48\u9519\uff0c\u5e76\u4e14\u4e5f\u4e0d\u652f\u6301\u6211\u4eec\u81ea\u5efa\u51fd\u6570\u8fdb\u884c\u515c\u5e95\u5904\u7406\uff0c\u8fd9\u4e00\u70b9\u5728 trpc-go \u7684\u5b98\u65b9\u4e5f\u5f97\u5230\u4e86\u627f\u8ba4\u3002<\/section>\n<\/li>\n<\/ol>\n

                \u540c\u6b65\u53d1\u9001<\/strong><\/p>\n

                \u540c\u6b65\u53d1\u9001(ack != 0 \u573a\u666f)\u662f\u5728\u5f02\u6b65\u53d1\u9001\u7684\u57fa\u7840\u4e0a\u52a0\u4ee5\u6761\u4ef6\u9650\u5236\u5b9e\u73b0\u7684\u3002\u540c\u6b65\u6d88\u606f\u53d1\u9001\u5728 newSyncProducerFromAsyncProducer \u4e2d\u5f00\u542f\u4e24\u4e2a\u5f02\u6b65\u534f\u7a0b<\/strong>\u5904\u7406\u6d88\u606f\u6210\u529f\u4e0e\u5931\u8d25\u7684\u201c\u56de\u8c03\u201d\uff0c\u5e76\u4f7f\u7528 waitGroup \u8fdb\u884c\u7b49\u5f85\uff0c\u4ece\u800c\u5c06\u5f02\u6b65\u64cd\u4f5c\u8f6c\u53d8\u4e3a\u540c\u6b65\u64cd\u4f5c\uff0c\u5176\u6d41\u7a0b\u5927\u6982\u5982\u4e0b\uff1a<\/p>\n

                \u901a\u8fc7\u4e0a\u8ff0\u5206\u6790\u53ef\u4ee5\u53d1\u73b0\uff0ckafka \u6d88\u606f\u53d1\u9001\u672c\u8d28\u4e0a\u90fd\u662f\u5f02\u6b65\u7684\uff0c\u4e0d\u8fc7\u540c\u6b65\u53d1\u9001\u901a\u8fc7 waitGroup \u5c06\u5f02\u6b65\u64cd\u4f5c\u8f6c\u53d8\u4e3a\u540c\u6b65\u64cd\u4f5c\u3002\u540c\u6b65\u53d1\u9001\u5728\u4e00\u5b9a\u7a0b\u5ea6\u4e0a\u786e\u4fdd\u4e86\u6211\u4eec\u5728\u8de8\u7f51\u7edc\u5411 Broker \u4f20\u8f93\u6d88\u606f\u65f6\uff0c\u6d88\u606f\u4e00\u5b9a\u53ef\u4ee5\u53ef\u9760\u5730\u4f20\u8f93\u5230 Broker<\/strong>\u3002\u56e0\u4e3a\u5728\u540c\u6b65\u53d1\u9001\u573a\u666f\u6211\u4eec\u53ef\u4ee5\u660e\u786e\u611f\u77e5\u6d88\u606f\u662f\u5426\u53d1\u9001\u81f3 Broker\uff0c\u82e5\u56e0\u7f51\u7edc\u6296\u52a8\u3001\u673a\u5668\u5b95\u673a\u7b49\u6545\u969c\u5bfc\u81f4\u6d88\u606f\u53d1\u9001\u5931\u8d25\u6216\u7ed3\u679c\u4e0d\u660e\uff0c\u53ef\u901a\u8fc7\u91cd\u8bd5\u7b49\u624b\u6bb5\u786e\u4fdd\u6d88\u606f\u81f3\u5c11\u4e00\u6b21\uff08at least once\uff09<\/strong> \u53d1\u9001\u5230 Broker\u3002\u53e6\u5916\uff0cKafka\uff080.11.0.0 \u7248\u672c\u540e\uff09\u8fd8\u4e3a Producer \u63d0\u4f9b\u4e24\u79cd\u673a\u5236\u6765\u5b9e\u73b0\u7cbe\u786e\u4e00\u6b21\uff08exactly once\uff09<\/strong> \u6d88\u606f\u53d1\u9001\uff1a\u5e42\u7b49\u6027\uff08Idempotence\uff09\u548c\u4e8b\u52a1\uff08Transaction\uff09\u3002<\/p>\n

                \u5c0f\u7ed3<\/span><\/h6>\n

                \u901a\u8fc7 ack \u7b56\u7565\u914d\u7f6e\u3001\u540c\u6b65\u53d1\u9001\u3001\u4e8b\u52a1\u6d88\u606f\u7ec4\u5408\u80fd\u529b\uff0c\u6211\u4eec\u53ef\u4ee5\u5b9e\u73b0exactly once \u8bed\u610f<\/strong>\u8de8\u7f51\u7edc\u5411 Broker \u4f20\u8f93\u6d88\u606f\u3002\u4f46\u662f\uff0cProducer \u6536\u5230 Broker \u7684\u6210\u529f ack\uff0c\u6d88\u606f\u4e00\u5b9a\u4e0d\u4f1a\u4e22\u5931\u5417\uff1f\u4e3a\u4e86\u641e\u6e05\u8fd9\u4e2a\u95ee\u9898\uff0c\u6211\u4eec\u9996\u5148\u8981\u641e\u660e\u767d Broker \u5728\u63a5\u6536\u5230\u6d88\u606f\u540e\u505a\u4e86\u54ea\u4e9b\u5904\u7406\u3002<\/p>\n

                \u53d1\u9001\u5230 Broker \u7684\u6d88\u606f\u53ef\u9760\u6301\u4e45\u5316<\/span><\/h5>\n

                \u4e3a\u4e86\u786e\u4fdd Producer \u6536\u5230 Broker \u7684\u6210\u529f ack \u540e\uff0c\u6d88\u606f\u4e00\u5b9a\u4e0d\u5728 Broker \u73af\u8282\u4e22\u5931\uff0c\u6211\u4eec\u6838\u5fc3\u8981\u5173\u6ce8\u4ee5\u4e0b\u51e0\u70b9\uff1a<\/p>\n

                  \n
                • \n
                  Broker \u8fd4\u56de Producer \u6210\u529f ack \u65f6\uff0c\u6d88\u606f\u662f\u5426\u5df2\u7ecf\u843d\u76d8\uff1b<\/section>\n<\/li>\n
                • \n
                  Broker \u5b95\u673a\u662f\u5426\u4f1a\u5bfc\u81f4\u6570\u636e\u4e22\u5931\uff0c\u5bb9\u707e\u673a\u5236\u662f\u4ec0\u4e48\uff1b<\/section>\n<\/li>\n
                • \n
                  Replica \u526f\u672c\u673a\u5236\u5e26\u6765\u7684\u591a\u526f\u672c\u95f4\u6570\u636e\u540c\u6b65\u4e00\u81f4\u6027\u95ee\u9898\u5982\u4f55\u89e3\u51b3\uff1b<\/section>\n<\/li>\n<\/ul>\n
                  Broker \u5f02\u6b65\u5237\u76d8\u673a\u5236<\/span><\/h6>\n

                  kafka \u4e3a\u4e86\u83b7\u5f97\u66f4\u9ad8\u541e\u5410\uff0cBroker \u63a5\u6536\u5230\u6d88\u606f\u540e\u53ea\u662f\u5c06\u6570\u636e\u5199\u5165 PageCache \u540e\u4fbf\u8ba4\u4e3a\u6d88\u606f\u5df2\u5199\u5165\u6210\u529f\uff0c\u800c PageCache \u4e2d\u7684\u6570\u636e\u901a\u8fc7 linux \u7684 flusher \u7a0b\u5e8f\u8fdb\u884c\u5f02\u6b65\u5237\u76d8\uff08\u5237\u76d8\u89e6\u53d1\u6761\uff1a\u4e3b\u52a8\u8c03\u7528 sync \u6216 fsync \u51fd\u6570\u3001\u53ef\u7528\u5185\u5b58\u4f4e\u4e8e\u9600\u503c\u3001dirty data \u65f6\u95f4\u8fbe\u5230\u9600\u503c\uff09\uff0c\u5c06\u6570\u636e\u987a\u5e8f\u5199\u5230\u78c1\u76d8\u3002\u6d88\u606f\u5904\u7406\u793a\u610f\u56fe\u5982\u4e0b\uff1a<\/p>\n

                  \u7531\u4e8e\u6d88\u606f\u662f\u5199\u5165\u5230 pageCache\uff0c\u5355\u673a\u573a\u666f\uff0c\u5982\u679c\u8fd8\u6ca1\u5237\u76d8 Broker \u5c31\u5b95\u673a\u4e86\uff0c\u90a3\u4e48 Producer \u4ea7\u751f\u7684\u8fd9\u90e8\u5206\u6570\u636e\u5c31\u53ef\u80fd\u4e22\u5931\u3002\u4e3a\u4e86\u89e3\u51b3\u5355\u673a\u6545\u969c\u53ef\u80fd\u5e26\u6765\u7684\u6570\u636e\u4e22\u5931\u95ee\u9898\uff0cKafka \u4e3a\u5206\u533a\u5f15\u5165\u4e86\u526f\u672c\u673a\u5236\u3002<\/p>\n

                  Replica \u526f\u672c\u673a\u5236<\/span><\/h6>\n

                  Kafka \u6bcf\u7ec4\u5206\u533a\u901a\u5e38\u6709\u591a\u4e2a\u526f\u672c\uff0c\u540c\u7ec4\u5206\u533a\u7684\u4e0d\u540c\u526f\u672c\u5206\u5e03\u5728\u4e0d\u540c\u7684 Broker \u4e0a\uff0c\u4fdd\u5b58\u76f8\u540c\u7684\u6d88\u606f(\u53ef\u80fd\u6709\u6ede\u540e)\u3002\u526f\u672c\u4e4b\u95f4\u662f\u201c\u4e00\u4e3b\u591a\u4ece\u201d\u7684\u5173\u7cfb\uff0c\u5176\u4e2d leader \u526f\u672c\u8d1f\u8d23\u5904\u7406\u8bfb\u5199\u8bf7\u6c42\uff0cfollower \u526f\u672c\u8d1f\u8d23\u4ece leader \u62c9\u53d6\u6d88\u606f\u8fdb\u884c\u540c\u6b65\u3002\u5206\u533a\u7684\u6240\u6709\u526f\u672c\u7edf\u79f0\u4e3a AR\uff08Assigned Replicas\uff09\uff0c\u5176\u4e2d\u6240\u6709\u4e0e leader \u526f\u672c\u4fdd\u6301\u4e00\u5b9a\u540c\u6b65\u7684\u526f\u672c\uff08\u5305\u62ec leader \u526f\u672c\u5728\u5185\uff09\u7ec4\u6210 ISR\uff08In-Sync Replicas\uff09\uff0c\u4e0e leader \u540c\u6b65\u6ede\u540e\u8fc7\u591a\u7684\u526f\u672c\u7ec4\u6210 OSR\uff08Out-of-Sync Replicas\uff09\uff0c\u7531\u6b64\u53ef\u89c1\uff0cAR=ISR+OSR\u3002<\/p>\n


                  follower \u526f\u672c\u662f\u5426\u4e0e leader \u540c\u6b65\u7684\u5224\u65ad\u6807\u51c6\u53d6\u51b3\u4e8e Broker \u7aef\u53c2\u6570 replica.lag.time.max.ms(\u9ed8\u8ba4\u4e3a 10 \u79d2)\uff0cfollower \u9ed8\u8ba4\u6bcf\u9694 500ms \u5411 leader fetch \u4e00\u6b21\u6570\u636e\uff0c\u53ea\u8981\u4e00\u4e2a Follower \u526f\u672c\u843d\u540e Leader \u526f\u672c\u7684\u65f6\u95f4\u4e0d\u8fde\u7eed\u8d85\u8fc7 10 \u79d2\uff0c\u90a3\u4e48 Kafka \u5c31\u8ba4\u4e3a\u8be5 Follower \u526f\u672c\u4e0e leader \u662f\u540c\u6b65\u7684\u3002\u5728\u6b63\u5e38\u60c5\u51b5\u4e0b\uff0c\u6240\u6709\u7684 follower \u526f\u672c\u90fd\u5e94\u8be5\u4e0e leader \u526f\u672c\u4fdd\u6301\u4e00\u5b9a\u7a0b\u5ea6\u7684\u540c\u6b65\uff0c\u5373 AR=ISR\uff0cOSR \u96c6\u5408\u4e3a\u7a7a\u3002<\/p>\n

                  \u5f53 leader \u526f\u672c\u6240\u5728 Broker \u5b95\u673a\u65f6\uff0cKafka \u4f1a\u501f\u52a9 ZK \u4ece follower \u526f\u672c\u4e2d\u9009\u4e3e\u65b0\u7684 leader \u7ee7\u7eed\u5bf9\u5916\u63d0\u4f9b\u670d\u52a1\uff0c\u5b9e\u73b0\u6545\u969c\u7684\u81ea\u52a8\u8f6c\u79fb\uff0c\u4fdd\u8bc1\u670d\u52a1\u53ef\u7528\u3002\u4e3a\u4e86\u4f7f\u9009\u4e3e\u7684\u65b0 leader \u548c\u65e7 leader \u6570\u636e\u5c3d\u53ef\u80fd\u4e00\u81f4\uff0c\u5f53 leader \u526f\u672c\u53d1\u751f\u6545\u969c\u65f6\uff0c\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u53ea\u6709\u5728 ISR \u96c6\u5408\u4e2d\u7684\u526f\u672c\u624d\u6709\u8d44\u683c\u88ab\u9009\u4e3e\u4e3a\u65b0\u7684 leader\uff0c\u800c\u5728 OSR \u96c6\u5408\u4e2d\u7684\u526f\u672c\u5219\u6ca1\u6709\u4efb\u4f55\u673a\u4f1a\uff08\u53ef\u901a\u8fc7\u8bbe\u7f6e unclean.leader.election.enable \u6539\u53d8\uff09\u3002<\/p>\n

                  \u5f53 Kafka \u901a\u8fc7\u591a\u526f\u672c\u673a\u5236\u89e3\u51b3\u5355\u673a\u6545\u969c\u95ee\u9898\u65f6\uff0c\u540c\u65f6\u4e5f\u5e26\u6765\u4e86\u591a\u526f\u672c\u95f4\u6570\u636e\u540c\u6b65\u4e00\u81f4\u6027\u95ee\u9898\u3002Kafka \u901a\u8fc7\u9ad8\u6c34\u4f4d\u66f4\u65b0\u673a\u5236\u3001\u526f\u672c\u540c\u6b65\u673a\u5236\u3001 Leader Epoch \u7b49\u591a\u79cd\u63aa\u65bd\u89e3\u51b3\u4e86\u591a\u526f\u672c\u95f4\u6570\u636e\u540c\u6b65\u4e00\u81f4\u6027\u95ee\u9898\uff0c\u4e0b\u9762\u6211\u4eec\u6765\u4f9d\u6b21\u770b\u4e0b\u8fd9\u51e0\u5927\u63aa\u65bd\u3002<\/p>\n

                  HW \u548c LEO<\/strong><\/p>\n

                  \u9996\u5148\uff0c\u6211\u4eec\u6765\u770b\u4e0b\u4e24\u4e2a\u548c Kafka \u4e2d\u65e5\u5fd7\u76f8\u5173\u7684\u91cd\u8981\u6982\u5ff5 HW \u548c LEO\uff1a<\/p>\n

                    \n
                  • \n
                    HW<\/strong>: High Watermark\uff0c\u9ad8\u6c34\u4f4d\uff0c\u8868\u793a\u5df2\u7ecf\u63d0\u4ea4(commit)\u7684\u6700\u5927\u65e5\u5fd7\u504f\u79fb\u91cf\uff0cKafka \u4e2d\u67d0\u6761\u65e5\u5fd7\u201c\u5df2\u63d0\u4ea4\u201d\u7684\u610f\u601d\u662f ISR \u4e2d\u6240\u6709\u8282\u70b9\u90fd\u5305\u542b\u4e86\u6b64\u6761\u65e5\u5fd7\uff0c\u5e76\u4e14\u6d88\u8d39\u8005\u53ea\u80fd\u6d88\u8d39 HW \u4e4b\u524d\u7684\u6570\u636e\uff1b<\/section>\n<\/li>\n
                  • \n
                    LEO<\/strong>: Log End Offset\uff0c\u8868\u793a\u5f53\u524d log \u6587\u4ef6\u4e2d\u4e0b\u4e00\u6761\u5f85\u5199\u5165\u6d88\u606f\u7684 offset\uff1b<\/section>\n<\/li>\n<\/ul>\n

                    \u5982\u4e0a\u56fe\u6240\u793a\uff0c\u5b83\u4ee3\u8868\u4e00\u4e2a\u65e5\u5fd7\u6587\u4ef6\uff0c\u8fd9\u4e2a\u65e5\u5fd7\u6587\u4ef6\u4e2d\u6709 8 \u6761\u6d88\u606f\uff0c0 \u81f3 5 \u4e4b\u95f4\u7684\u6d88\u606f\u4e3a\u5df2\u63d0\u4ea4\u6d88\u606f\uff0c5 \u81f3 7 \u7684\u6d88\u606f\u4e3a\u672a\u63d0\u4ea4\u6d88\u606f\u3002\u65e5\u5fd7\u6587\u4ef6\u7684 HW \u4e3a 6\uff0c\u8868\u793a\u6d88\u8d39\u8005\u53ea\u80fd\u62c9\u53d6\u5230 5 \u4e4b\u524d\u7684\u6d88\u606f\uff0c\u800c offset \u4e3a 5 \u7684\u6d88\u606f\u5bf9\u6d88\u8d39\u8005\u800c\u8a00\u662f\u4e0d\u53ef\u89c1\u7684\u3002\u65e5\u5fd7\u6587\u4ef6\u7684 LEO \u4e3a 8\uff0c\u4e0b\u4e00\u6761\u6d88\u606f\u5c06\u5728\u6b64\u5904\u5199\u5165\u3002<\/p>\n

                    \u6ce8\u610f\uff1a\u6240\u6709\u526f\u672c\u90fd\u6709\u5bf9\u5e94\u7684 HW \u548c LEO\uff0c\u53ea\u4e0d\u8fc7 Leader \u526f\u672c\u6bd4\u8f83\u7279\u6b8a\uff0cKafka \u4f7f\u7528 Leader \u526f\u672c\u7684\u9ad8\u6c34\u4f4d\u6765\u5b9a\u4e49\u6240\u5728\u5206\u533a\u7684\u9ad8\u6c34\u4f4d\u3002\u6362\u53e5\u8bdd\u8bf4\uff0c\u5206\u533a\u7684\u9ad8\u6c34\u4f4d\u5c31\u662f\u5176 Leader \u526f\u672c\u7684\u9ad8\u6c34\u4f4d\u3002Leader \u526f\u672c\u548c Follower \u526f\u672c\u7684 HW \u6709\u5982\u4e0b\u7279\u70b9\uff1a<\/p>\n

                      \n
                    • \n
                      Leader HW<\/strong>\uff1amin\uff08\u6240\u6709\u526f\u672c LEO\uff09\uff0c\u4e3a\u6b64 Leader \u526f\u672c\u4e0d\u4ec5\u8981\u4fdd\u5b58\u81ea\u5df1\u7684 HW \u548c LEO\uff0c\u8fd8\u8981\u4fdd\u5b58 follower \u526f\u672c\u7684 HW \u548c LEO\uff0c\u800c follower \u526f\u672c\u53ea\u9700\u4fdd\u5b58\u81ea\u5df1\u7684 HW \u548c LEO\uff1b<\/section>\n<\/li>\n
                    • \n
                      Follower HW<\/strong>\uff1amin(follower \u81ea\u8eab LEO\uff0cleader HW)\u3002<\/section>\n<\/li>\n<\/ul>\n

                      \u6ce8\u610f\uff1a\u4e3a\u65b9\u4fbf\u63cf\u8ff0\uff0c\u4e0b\u9762Leader HW\u7b80\u8bb0\u4e3aHW<\/span>L<\/sub>\uff0cFollower HW\u7b80\u8bb0\u4e3a<\/span>F<\/sub>\uff0cLeader LEO\u7b80\u8bb0\u4e3aLEO<\/span>L<\/sub> \uff0cFollower LEO\u7b80\u8bb0\u4e3aLEO<\/span>F<\/sub>\u3002<\/span><\/p>\n

                      \u4e0b\u9762\u6211\u4eec\u6f14\u793a\u4e00\u6b21\u5b8c\u6574\u7684 HW \/ LEO \u66f4\u65b0\u6d41\u7a0b\uff1a<\/p>\n

                        \n
                      1. \n
                        \u521d\u59cb\u72b6\u6001<\/section>\n<\/li>\n<\/ol>\n

                        HW<\/span>L<\/sub>=0\uff0cLEO<\/span>L<\/sub>=0\uff0cHW<\/span>F<\/sub>=0\uff0cLEO<\/span>F<\/sub>=0\u3002<\/span><\/p>\n

                          \n
                        1. \n
                          Follower \u7b2c\u4e00\u6b21 fetch<\/section>\n<\/li>\n<\/ol>\n
                            \n
                          • \n
                            Leader\u6536\u5230Producer\u53d1\u6765\u7684\u4e00\u6761\u6d88\u606f\u5b8c\u6210\u5b58\u50a8, \u66f4\u65b0LEO<\/span>L<\/sub>=1;<\/span><\/span><\/section>\n<\/li>\n
                          • \n
                            Follower\u4eceLeader fetch\u6570\u636e,  Leader\u6536\u5230\u8bf7\u6c42\uff0c\u8bb0\u5f55follower\u7684LEO<\/span>F<\/sub> =0\uff0c\u5e76\u4e14\u5c1d\u8bd5\u66f4\u65b0HW<\/span>L<\/sub> =min(\u5168\u90e8\u526f\u672cLEO)=0\uff1b<\/span><\/span><\/section>\n
                            \n

                            eade\u8fd4\u56deHWL<\/sub>=0\u548cLEOL<\/sub>=1\u7ed9Follower\uff0cFollower\u5b58\u50a8\u6d88\u606f\u5e76\u66f4\u65b0LEOF<\/sub> =1, HW=min(LEOF<\/sub>\uff0cHWL<\/sub>)=0\u3002<\/span><\/p>\n<\/section>\n


                            <\/section>\n

                              \n
                            1. \n
                              Follower \u7b2c\u4e8c\u6b21 fetch<\/span><\/section>\n<\/li>\n<\/ol>\n
                                \n
                              • \n
                                \n

                                Follower\u518d\u6b21\u4eceLeader fetch\u6570\u636e,  Leader\u6536\u5230\u8bf7\u6c42\uff0c\u8bb0\u5f55follower\u7684LEO<\/span>F<\/sub> =1\uff0c\u5e76\u4e14\u5c1d\u8bd5\u66f4\u65b0HW<\/span>L<\/sub> =min(\u5168\u90e8\u526f\u672cLEO)=1\uff1b<\/span><\/span><\/p>\n<\/section>\n<\/li>\n

                              • \n
                                \n

                                leade\u8fd4\u56deHW<\/span>L<\/sub>=1\u548cLEO<\/span>L<\/sub>=1\u7ed9Follower\uff0cLeader\u6536\u5230\u8bf7\u6c42\uff0c\u66f4\u65b0\u81ea\u5df1\u7684 HW=min(LEO<\/span>F<\/sub>\uff0cHW<\/span>L<\/sub>)=1\u3002<\/span><\/span><\/p>\n<\/section>\n


                                <\/section>\n<\/li>\n<\/ul>\n

                                \u4e0a\u8ff0\u66f4\u65b0\u6d41\u7a0b\u4e2d Follower \u548c Leader \u7684 HW \u66f4\u65b0\u6709\u65f6\u95f4 GAP\u3002\u5982\u679c Leader \u8282\u70b9\u5728\u6b64\u671f\u95f4\u53d1\u751f\u6545\u969c\uff0c\u5219 Follower \u7684 HW \u548c Leader \u7684 HW \u53ef\u80fd\u4f1a\u5904\u4e8e\u4e0d\u4e00\u81f4\u72b6\u6001\uff0c\u5982\u679c Followe \u88ab\u9009\u4e3a\u65b0\u7684 Leader \u5e76\u4e14\u4ee5\u81ea\u5df1\u7684 HW \u4e3a\u51c6\u5bf9\u5916\u63d0\u4f9b\u670d\u52a1\uff0c\u5219\u53ef\u80fd\u5e26\u6765\u6570\u636e\u4e22\u5931\u6216\u6570\u636e\u9519\u4e71\u95ee\u9898\u3002<\/p>\n

                                KIP-101 \u95ee\u9898\uff1a\u6570\u636e\u4e22\u5931&\u6570\u636e\u9519\u4e71 ^\u53c2 5^<\/strong><\/p>\n

                                \u6570\u636e\u4e22\u5931<\/strong><\/p>\n

                                \u7b2c 1 \u6b65:<\/p>\n

                                  \n
                                1. \n
                                  \u526f\u672c B \u4f5c\u4e3a leader \u6536\u5230 producer \u7684 m2 \u6d88\u606f\u5e76\u5199\u5165\u672c\u5730\u6587\u4ef6\uff0c\u7b49\u5f85\u526f\u672c A \u62c9\u53d6\u3002<\/section>\n<\/li>\n
                                2. \n
                                  \u526f\u672c A \u53d1\u8d77\u6d88\u606f\u62c9\u53d6\u8bf7\u6c42\uff0c\u8bf7\u6c42\u4e2d\u643a\u5e26\u81ea\u5df1\u7684\u6700\u65b0\u7684\u65e5\u5fd7 offset\uff08LEO=1\uff09\uff0cB \u6536\u5230\u540e\u66f4\u65b0\u81ea\u5df1\u7684 HW \u4e3a 1\uff0c\u5e76\u5c06 HW=1 \u7684\u4fe1\u606f\u4ee5\u53ca\u6d88\u606f m2 \u8fd4\u56de\u7ed9 A\u3002<\/section>\n<\/li>\n
                                3. \n
                                  A \u6536\u5230\u62c9\u53d6\u7ed3\u679c\u540e\u66f4\u65b0\u672c\u5730\u7684 HW \u4e3a 1\uff0c\u5e76\u5c06 m2 \u5199\u5165\u672c\u5730\u6587\u4ef6\u3002\u53d1\u8d77\u65b0\u4e00\u8f6e\u62c9\u53d6\u8bf7\u6c42\uff08LEO=2\uff09\uff0cB \u6536\u5230 A \u62c9\u53d6\u8bf7\u6c42\u540e\u66f4\u65b0\u81ea\u5df1\u7684 HW \u4e3a 2\uff0c\u6ca1\u6709\u65b0\u6570\u636e\u53ea\u5c06 HW=2 \u7684\u4fe1\u606f\u8fd4\u56de\u7ed9 A\uff0c\u5e76\u4e14\u56de\u590d\u7ed9 producer \u5199\u5165\u6210\u529f\u3002\u6b64\u5904\u7684\u72b6\u6001\u5c31\u662f\u56fe\u4e2d\u7b2c\u4e00\u6b65\u7684\u72b6\u6001\u3002<\/section>\n<\/li>\n<\/ol>\n

                                  \u7b2c 2 \u6b65\uff1a<\/p>\n

                                  \u6b64\u65f6\uff0c\u5982\u679c\u6ca1\u6709\u5f02\u5e38\uff0cA \u4f1a\u6536\u5230 B \u7684\u56de\u590d\uff0c\u5f97\u77e5\u76ee\u524d\u7684 HW \u4e3a 2\uff0c\u7136\u540e\u66f4\u65b0\u81ea\u8eab\u7684 HW \u4e3a 2\u3002\u4f46\u5728\u6b64\u65f6 A \u91cd\u542f\u4e86\uff0c\u6ca1\u6709\u6765\u5f97\u53ca\u6536\u5230 B \u7684\u56de\u590d\uff0c\u6b64\u65f6 B \u4ecd\u7136\u662f leader\u3002A \u91cd\u542f\u4e4b\u540e\u4f1a\u4ee5 HW \u4e3a\u6807\u51c6\u622a\u65ad\u81ea\u5df1\u7684\u65e5\u5fd7\uff0c\u56e0\u4e3a A \u4f5c\u4e3a follower \u4e0d\u77e5\u9053\u591a\u51fa\u7684\u65e5\u5fd7\u662f\u5426\u662f\u88ab\u63d0\u4ea4\u8fc7\u7684\uff0c\u9632\u6b62\u6570\u636e\u4e0d\u4e00\u81f4\u4ece\u800c\u622a\u65ad\u591a\u4f59\u7684\u6570\u636e\u5e76\u5c1d\u8bd5\u4ece leader \u90a3\u91cc\u91cd\u65b0\u540c\u6b65\u3002<\/strong><\/p>\n

                                  \u7b2c 3 \u6b65\uff1a<\/p>\n

                                  B \u5d29\u6e83\u4e86\uff0cmin.isr \u8bbe\u7f6e\u7684\u662f 1\uff0c\u6240\u4ee5 zookeeper \u4f1a\u4ece ISR \u4e2d\u518d\u9009\u62e9\u4e00\u4e2a\u4f5c\u4e3a leader\uff0c\u4e5f\u5c31\u662f A\uff0c\u4f46\u662f A \u7684\u6570\u636e\u4e0d\u662f\u5b8c\u6574\u7684\uff0c\u4ece\u800c\u51fa\u73b0\u4e86\u6570\u636e\u4e22\u5931\u73b0\u8c61\u3002<\/p>\n

                                  \u95ee\u9898\u5728\u54ea\u91cc\uff1f\u5728\u4e8e A \u91cd\u542f\u4e4b\u540e\u4ee5 HW \u4e3a\u6807\u51c6\u622a\u65ad\u4e86\u591a\u4f59\u7684\u65e5\u5fd7\u3002\u4e0d\u622a\u65ad\u884c\u4e0d\u884c\uff1f\u4e0d\u884c\uff0c\u56e0\u4e3a\u8fd9\u4e2a\u65e5\u5fd7\u53ef\u80fd\u6ca1\u88ab\u63d0\u4ea4\u8fc7\uff08\u4e5f\u5c31\u662f\u6ca1\u6709\u88ab ISR \u4e2d\u7684\u6240\u6709\u8282\u70b9\u5199\u5165\u8fc7\uff09\uff0c\u5982\u679c\u4fdd\u7559\u4f1a\u5bfc\u81f4\u65e5\u5fd7\u9519\u4e71\u3002<\/p>\n

                                  \u6570\u636e\u9519\u4e71<\/strong><\/p>\n

                                  \u5728\u5206\u6790\u65e5\u5fd7\u9519\u4e71\u7684\u95ee\u9898\u4e4b\u524d\uff0c\u6211\u4eec\u9700\u8981\u4e86\u89e3\u5230 kafka \u7684\u526f\u672c\u53ef\u9760\u6027\u4fdd\u8bc1\u6709\u4e00\u4e2a\u524d\u63d0\uff1a\u5728 ISR \u4e2d\u81f3\u5c11\u6709\u4e00\u4e2a\u8282\u70b9\u3002\u5982\u679c\u8282\u70b9\u5747\u5b95\u673a\u7684\u60c5\u51b5\u4e0b\uff0c\u662f\u4e0d\u4fdd\u8bc1\u53ef\u9760\u6027\u7684\uff0c\u5728\u8fd9\u79cd\u60c5\u51b5\u4f1a\u51fa\u73b0\u6570\u636e\u4e22\u5931\uff0c\u6570\u636e\u4e22\u5931\u662f\u53ef\u63a5\u53d7\u7684\u3002\u8fd9\u91cc\u6211\u4eec\u5206\u6790\u7684\u95ee\u9898\u6bd4\u6570\u636e\u4e22\u5931\u66f4\u52a0\u69fd\u7cd5\uff0c\u4f1a\u5f15\u53d1\u65e5\u5fd7\u9519\u4e71\u751a\u81f3\u5bfc\u81f4\u6574\u4e2a\u7cfb\u7edf\u5f02\u5e38\uff0c\u800c\u8fd9\u662f\u4e0d\u53ef\u63a5\u53d7\u7684\u3002<\/p>\n

                                  \u7b2c 1 \u6b65\uff1a<\/p>\n

                                    \n
                                  1. \n
                                    A \u548c B \u5747\u4e3a ISR \u4e2d\u7684\u8282\u70b9\u3002\u526f\u672c A \u4f5c\u4e3a leader\uff0c\u6536\u5230 producer \u7684\u6d88\u606f m2 \u7684\u8bf7\u6c42\u540e\u5199\u5165 PageCache \u5e76\u5728\u67d0\u4e2a\u65f6\u523b\u5237\u65b0\u5230\u672c\u5730\u78c1\u76d8\u3002<\/section>\n<\/li>\n
                                  2. \n
                                    \u526f\u672c B \u62c9\u53d6\u5230 m2 \u540e\u5199\u5165 PageCage \u540e\uff08\u5c1a\u672a\u5237\u76d8\uff09<\/strong>\u518d\u6b21\u53bb A \u4e2d\u62c9\u53d6\u65b0\u6d88\u606f\u5e76\u544a\u77e5 A \u81ea\u5df1\u7684 LEO=2\uff0cA \u6536\u5230\u66f4\u65b0\u81ea\u5df1\u7684 HW \u4e3a 1 \u5e76\u56de\u590d\u7ed9 producer \u6210\u529f\u3002<\/section>\n<\/li>\n
                                  3. \n
                                    \u6b64\u65f6 A \u548c B \u540c\u65f6\u5b95\u673a\uff0cB \u7684 m2 \u7531\u4e8e\u5c1a\u672a\u5237\u76d8\uff0c\u6240\u4ee5 m2 \u6d88\u606f\u4e22\u5931<\/strong>\u3002\u6b64\u65f6\u7684\u72b6\u6001\u5c31\u662f\u7b2c 1 \u6b65\u7684\u72b6\u6001\u3002<\/section>\n<\/li>\n<\/ol>\n

                                    \u7b2c 2 \u6b65\uff1a<\/p>\n

                                    \u7531\u4e8e A \u548c B \u5747\u5b95\u673a\uff0c\u800c min.isr=1 \u5e76\u4e14 unclean.leader.election.enable=true\uff08\u5173\u95ed unclean \u9009\u62e9\u7b56\u7565\uff09\uff0c\u6240\u4ee5 Kafka \u4f1a\u7b49\u5230\u7b2c\u4e00\u4e2a ISR \u4e2d\u7684\u8282\u70b9\u6062\u590d\u5e76\u9009\u4e3a leader\uff0c\u8fd9\u91cc\u4e0d\u5e78\u7684\u662f B \u88ab\u9009\u4e3a leader\uff0c\u800c\u4e14\u8fd8\u63a5\u6536\u5230 producer \u53d1\u6765\u7684\u65b0\u6d88\u606f m3\u3002\u6ce8\u610f\uff0c\u8fd9\u91cc\u4e22\u5931 m2 \u6d88\u606f\u662f\u53ef\u63a5\u53d7\u7684\uff0c\u6bd5\u7adf\u6240\u6709\u8282\u70b9\u90fd\u5b95\u673a\u4e86\u3002<\/strong><\/p>\n

                                    \u7b2c 3 \u6b65\uff1a<\/p>\n

                                    A \u6062\u590d\u91cd\u542f\u540e\u53d1\u73b0\u81ea\u5df1\u662f follower\uff0c\u800c\u4e14 HW \u4e3a 2\uff0c\u5e76\u6ca1\u6709\u591a\u4f59\u7684\u6570\u636e\u9700\u8981\u622a\u65ad\uff0c\u6240\u4ee5\u5f00\u59cb\u548c B \u8fdb\u884c\u65b0\u4e00\u8f6e\u7684\u540c\u6b65\u3002\u4f46\u6b64\u65f6 A \u548c B \u5747\u6ca1\u6709\u610f\u8bc6\u5230\uff0coffset \u4e3a 1 \u7684\u6d88\u606f\u4e0d\u4e00\u81f4\u4e86\u3002<\/p>\n

                                    \u95ee\u9898\u5728\u54ea\u91cc\uff1f\u5728\u4e8e\u65e5\u5fd7\u7684\u5199\u5165\u662f\u5f02\u6b65\u7684\uff0c\u4e0a\u9762\u4e5f\u63d0\u5230 Kafka \u7684\u526f\u672c\u7b56\u7565\u7684\u4e00\u4e2a\u8bbe\u8ba1\u662f\u6d88\u606f\u7684\u6301\u4e45\u5316\u662f\u5f02\u6b65\u7684\uff0c\u8fd9\u5c31\u4f1a\u5bfc\u81f4\u5728\u573a\u666f\u4e8c\u7684\u60c5\u51b5\u4e0b\u88ab\u9009\u51fa\u7684 leader \u4e0d\u4e00\u5b9a\u5305\u542b\u6240\u6709\u6570\u636e\uff0c\u4ece\u800c\u5f15\u53d1\u65e5\u5fd7\u9519\u4e71\u7684\u95ee\u9898\u3002<\/p>\n

                                    Leader Epoch<\/strong><\/p>\n

                                    \u4e3a\u4e86\u89e3\u51b3\u4e0a\u8ff0\u7f3a\u9677\uff0cKafka \u5f15\u5165\u4e86 Leader Epoch \u7684\u6982\u5ff5\u3002leader epoch \u548c raft \u4e2d\u7684\u4efb\u671f\u53f7\u7684\u6982\u5ff5\u5f88\u7c7b\u4f3c\uff0c\u6bcf\u6b21\u91cd\u65b0\u9009\u62e9 leader \u7684\u65f6\u5019\uff0c\u7528\u4e00\u4e2a\u4e25\u683c\u5355\u8c03\u9012\u589e\u7684 id \u6765\u6807\u5fd7\uff0c\u53ef\u4ee5\u8ba9\u6240\u6709 follower \u610f\u8bc6\u5230 leader \u7684\u53d8\u5316\u3002\u800c follower \u4e5f\u4e0d\u518d\u4ee5 HW \u4e3a\u51c6\uff0c\u6bcf\u6b21\u5954\u6e83\u91cd\u542f\u540e\u90fd\u9700\u8981\u53bb leader \u90a3\u8fb9\u786e\u8ba4\u4e0b\u5f53\u524d leader \u7684\u65e5\u5fd7\u662f\u4ece\u54ea\u4e2a offset \u5f00\u59cb\u7684\u3002\u4e0b\u9762\u770b\u4e0b Leader Epoch \u662f\u5982\u4f55\u89e3\u51b3\u4e0a\u9762\u4e24\u4e2a\u95ee\u9898\u7684\u3002<\/p>\n

                                    \u6570\u636e\u4e22\u5931\u89e3\u51b3<\/strong><\/p>\n

                                    \u8fd9\u91cc\u7684\u5173\u952e\u70b9\u5728\u4e8e\u526f\u672c A \u91cd\u542f\u540e\u4f5c\u4e3a follower\uff0c\u4e0d\u662f\u5fd9\u7740\u4ee5 HW \u4e3a\u51c6\u622a\u65ad\u81ea\u5df1\u7684\u65e5\u5fd7\uff0c\u800c\u662f\u5148\u53d1\u8d77 LeaderEpochRequest \u8be2\u95ee\u526f\u672c B \u7b2c 0 \u4ee3\u7684\u6700\u65b0\u7684\u504f\u79fb\u91cf\u662f\u591a\u5c11\uff0c\u526f\u672c B \u4f1a\u8fd4\u56de\u81ea\u5df1\u7684 LEO \u4e3a 2 \u7ed9\u526f\u672c A\uff0cA \u6b64\u65f6\u5c31\u77e5\u9053\u6d88\u606f m2 \u4e0d\u80fd\u88ab\u622a\u65ad\uff0c\u6240\u4ee5 m2 \u5f97\u5230\u4e86\u4fdd\u7559\u3002\u5f53 A \u9009\u4e3a leader \u7684\u65f6\u5019\u5c31\u4fdd\u7559\u4e86\u6240\u6709\u5df2\u63d0\u4ea4\u7684\u65e5\u5fd7\uff0c\u65e5\u5fd7\u4e22\u5931\u7684\u95ee\u9898\u5f97\u5230\u89e3\u51b3\u3002<\/p>\n

                                    \u5982\u679c\u53d1\u8d77 LeaderEpochRequest \u7684\u65f6\u5019\u5c31\u5df2\u7ecf\u6302\u4e86\u600e\u4e48\u529e\uff1f\u8fd9\u79cd\u573a\u666f\u4e0b\uff0c\u4e0d\u4f1a\u51fa\u73b0\u65e5\u5fd7\u4e22\u5931\uff0c\u56e0\u4e3a\u526f\u672c A \u88ab\u9009\u4e3a leader \u540e\u4e0d\u4f1a\u622a\u65ad\u81ea\u5df1\u7684\u65e5\u5fd7\uff0c\u65e5\u5fd7\u622a\u65ad\u53ea\u4f1a\u53d1\u751f\u5728 follower \u8eab\u4e0a\u3002<\/p>\n

                                    \u6570\u636e\u9519\u4e71\u89e3\u51b3<\/strong><\/p>\n

                                    \u8fd9\u91cc\u7684\u5173\u952e\u70b9\u8fd8\u662f\u5728\u7b2c 3 \u6b65\uff0c\u526f\u672c A \u91cd\u542f\u4f5c\u4e3a follower \u7684\u7b2c\u4e00\u6b65\u8fd8\u662f\u9700\u8981\u53d1\u8d77 LeaderEpochRequest \u8be2\u95ee leader \u5f53\u524d\u7b2c 0 \u4ee3\u6700\u65b0\u7684\u504f\u79fb\u91cf\u662f\u591a\u5c11\uff0c\u7531\u4e8e\u526f\u672c B \u5df2\u7ecf\u7ecf\u8fc7\u6362\u4ee3\uff0c\u6240\u4ee5\u4f1a\u8fd4\u56de\u7ed9 A \u7b2c 1 \u4ee3\u7684\u8d77\u59cb\u504f\u79fb\uff08\u4e5f\u5c31\u662f 1\uff09\uff0cA \u53d1\u73b0\u51b2\u7a81\u540e\u4f1a\u622a\u65ad\u81ea\u5df1\u504f\u79fb\u91cf\u4e3a 1 \u7684\u65e5\u5fd7\uff0c\u5e76\u91cd\u65b0\u5f00\u59cb\u548c leader \u540c\u6b65\u3002\u526f\u672c A \u548c\u526f\u672c B \u7684\u65e5\u5fd7\u8fbe\u5230\u4e86\u4e00\u81f4\uff0c\u89e3\u51b3\u4e86\u65e5\u5fd7\u9519\u4e71\u3002<\/p>\n

                                    \u5c0f\u7ed3<\/span><\/h6>\n

                                    Broker \u63a5\u6536\u5230\u6d88\u606f\u540e\u53ea\u662f\u5c06\u6570\u636e\u5199\u5165 PageCache \u540e\u4fbf\u8ba4\u4e3a\u6d88\u606f\u5df2\u5199\u5165\u6210\u529f\uff0c\u4f46\u662f\uff0c\u901a\u8fc7\u526f\u672c\u673a\u5236\u5e76\u7ed3\u5408 ACK \u7b56\u7565\u53ef\u4ee5\u5927\u6982\u7387\u89c4\u907f\u5355\u673a\u5b95\u673a\u5e26\u6765\u7684\u6570\u636e\u4e22\u5931\u95ee\u9898\uff0c\u5e76\u901a\u8fc7 HW\u3001\u526f\u672c\u540c\u6b65\u673a\u5236\u3001 Leader Epoch \u7b49\u591a\u79cd\u63aa\u65bd\u89e3\u51b3\u4e86\u591a\u526f\u672c\u95f4\u6570\u636e\u540c\u6b65\u4e00\u81f4\u6027\u95ee\u9898\uff0c\u6700\u7ec8\u5b9e\u73b0\u4e86 Broker \u6570\u636e\u7684\u53ef\u9760\u6301\u4e45\u5316\u3002<\/p>\n

                                    \u6d88\u8d39\u8005\u4ece Broker \u6d88\u8d39\u5230\u6d88\u606f\u4e14\u6700\u597d\u53ea\u6d88\u8d39\u4e00\u6b21<\/span><\/h5>\n

                                    Consumer \u5728\u6d88\u8d39\u6d88\u606f\u7684\u8fc7\u7a0b\u4e2d\u9700\u8981\u5411 Kafka \u6c47\u62a5\u81ea\u5df1\u7684\u4f4d\u79fb\u6570\u636e\uff0c\u53ea\u6709\u5f53 Consumer \u5411 Kafka \u6c47\u62a5\u4e86\u6d88\u606f\u4f4d\u79fb\uff0c\u8be5\u6761\u6d88\u606f\u624d\u4f1a\u88ab Broker \u8ba4\u4e3a\u5df2\u7ecf\u88ab\u6d88\u8d39\u3002\u56e0\u6b64\uff0cConsumer \u7aef\u6d88\u606f\u7684\u53ef\u9760\u6027\u4e3b\u8981\u548c offset \u63d0\u4ea4\u65b9\u5f0f\u6709\u5173\uff0cKafka \u6d88\u8d39\u7aef\u63d0\u4f9b\u4e86\u4e24\u79cd\u6d88\u606f\u63d0\u4ea4\u65b9\u5f0f\uff1a<\/p>\n


                                    <\/section>\n

                                    \u6b63\u5e38\u60c5\u51b5\u4e0b\u6211\u4eec\u5f88\u96be\u5b9e\u73b0 exactly once \u8bed\u610f\u7684\u6d88\u606f\uff0c\u901a\u5e38\u662f\u901a\u8fc7\u624b\u52a8\u63d0\u4ea4+\u5e42\u7b49\u5b9e\u73b0\u6d88\u606f\u7684\u53ef\u9760\u6d88\u8d39\u3002<\/p>\n


                                    <\/p>\n

                                    Kafka \u9ad8\u6027\u80fd\u63a2\u7a76<\/span><\/h3>\n

                                    Kafka \u9ad8\u6027\u80fd\u7684\u6838\u5fc3\u662f\u4fdd\u969c\u7cfb\u7edf\u4f4e\u5ef6\u8fdf\u3001\u9ad8\u541e\u5410\u5730\u5904\u7406\u6d88\u606f\uff0c\u4e3a\u6b64\uff0cKafaka \u91c7\u7528\u4e86\u8bb8\u591a\u7cbe\u5999\u7684\u8bbe\u8ba1\uff1a<\/p>\n

                                      \n
                                    • \n
                                      \u5f02\u6b65\u53d1\u9001<\/section>\n<\/li>\n
                                    • \n
                                      \u6279\u91cf\u53d1\u9001<\/section>\n<\/li>\n
                                    • \n
                                      \u538b\u7f29\u6280\u672f<\/section>\n<\/li>\n
                                    • \n
                                      Pagecache \u673a\u5236&\u987a\u5e8f\u8ffd\u52a0\u843d\u76d8<\/section>\n<\/li>\n
                                    • \n
                                      \u96f6\u62f7\u8d1d<\/section>\n<\/li>\n
                                    • \n
                                      \u7a00\u758f\u7d22\u5f15<\/section>\n<\/li>\n
                                    • \n
                                      broker & \u6570\u636e\u5206\u533a<\/section>\n<\/li>\n
                                    • \n
                                      \u591a reactor \u591a\u7ebf\u7a0b\u7f51\u7edc\u6a21\u578b<\/section>\n<\/li>\n<\/ul>\n

                                      \u5f02\u6b65\u53d1\u9001<\/h4>\n

                                      \u5982\u4e0a\u6587\u6240\u8ff0\uff0cKafka \u63d0\u4f9b\u4e86\u5f02\u6b65\u548c\u540c\u6b65\u4e24\u79cd\u6d88\u606f\u53d1\u9001\u65b9\u5f0f\u3002\u5728\u5f02\u6b65\u53d1\u9001\u4e2d\uff0c\u6574\u4e2a\u6d41\u7a0b\u90fd\u662f\u5f02\u6b65\u7684\u3002\u8c03\u7528\u5f02\u6b65\u53d1\u9001\u65b9\u6cd5\u540e\uff0c\u6d88\u606f\u4f1a\u88ab\u5199\u5165 channel\uff0c\u7136\u540e\u7acb\u5373\u8fd4\u56de\u6210\u529f\u3002Dispatcher \u534f\u7a0b\u4f1a\u4ece channel \u8f6e\u8be2\u6d88\u606f\uff0c\u5c06\u5176\u53d1\u9001\u5230 Broker\uff0c\u540c\u65f6\u4f1a\u6709\u53e6\u4e00\u4e2a\u5f02\u6b65\u534f\u7a0b\u8d1f\u8d23\u5904\u7406 Broker \u8fd4\u56de\u7684\u7ed3\u679c\u3002\u540c\u6b65\u53d1\u9001\u672c\u8d28\u4e0a\u4e5f\u662f\u5f02\u6b65\u7684\uff0c\u4f46\u662f\u5728\u5904\u7406\u7ed3\u679c\u65f6\uff0c\u540c\u6b65\u53d1\u9001\u901a\u8fc7 waitGroup \u5c06\u5f02\u6b65\u64cd\u4f5c\u8f6c\u6362\u4e3a\u540c\u6b65\u3002\u4f7f\u7528\u5f02\u6b65\u53d1\u9001\u53ef\u4ee5\u6700\u5927\u5316\u63d0\u9ad8\u6d88\u606f\u53d1\u9001\u7684\u541e\u5410\u80fd\u529b\u3002<\/p>\n

                                      \u6279\u91cf\u53d1\u9001<\/h4>\n

                                      Kafka \u652f\u6301\u6279\u91cf\u53d1\u9001\u6d88\u606f\uff0c\u5c06\u591a\u4e2a\u6d88\u606f\u6253\u5305\u6210\u4e00\u4e2a\u6279\u6b21\u8fdb\u884c\u53d1\u9001\uff0c\u4ece\u800c\u51cf\u5c11\u7f51\u7edc\u4f20\u8f93\u7684\u5f00\u9500\uff0c\u63d0\u9ad8\u7f51\u7edc\u4f20\u8f93\u7684\u6548\u7387\u548c\u541e\u5410\u91cf\u3002Kafka \u7684\u6279\u91cf\u53d1\u9001\u6d88\u606f\u662f\u901a\u8fc7\u4ee5\u4e0b\u4e24\u4e2a\u53c2\u6570\u6765\u63a7\u5236\u7684\uff1a<\/p>\n

                                        \n
                                      1. \n
                                        batch.size\uff1a\u63a7\u5236\u6279\u91cf\u53d1\u9001\u6d88\u606f\u7684\u5927\u5c0f\uff0c\u9ed8\u8ba4\u503c\u4e3a 16KB\uff0c\u53ef\u9002\u5f53\u589e\u52a0 batch.size \u53c2\u6570\u503c\u63d0\u5347\u541e\u5410\u3002\u4f46\u662f\uff0c\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u5982\u679c\u6279\u91cf\u53d1\u9001\u7684\u5927\u5c0f\u8bbe\u7f6e\u5f97\u8fc7\u5927\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u6d88\u606f\u53d1\u9001\u7684\u5ef6\u8fdf\u589e\u52a0\uff0c\u56e0\u6b64\u9700\u8981\u6839\u636e\u5b9e\u9645\u60c5\u51b5\u8fdb\u884c\u8c03\u6574<\/strong>\u3002<\/section>\n<\/li>\n
                                      2. \n
                                        linger.ms\uff1a\u63a7\u5236\u6d88\u606f\u5728\u6279\u91cf\u53d1\u9001\u524d\u7684\u7b49\u5f85\u65f6\u95f4\uff0c\u9ed8\u8ba4\u503c\u4e3a 0\u3002\u5f53 linger.ms \u5927\u4e8e 0 \u65f6\uff0c\u5982\u679c\u6709\u6d88\u606f\u53d1\u9001\uff0cKafka \u4f1a\u7b49\u5f85\u6307\u5b9a\u7684\u65f6\u95f4\uff0c\u5982\u679c\u7b49\u5f85\u65f6\u95f4\u5230\u8fbe\u6216\u8005\u6279\u91cf\u5927\u5c0f\u8fbe\u5230 batch.size\uff0c\u5c31\u4f1a\u5c06\u6d88\u606f\u6253\u5305\u6210\u4e00\u4e2a\u6279\u6b21\u8fdb\u884c\u53d1\u9001\u3002\u53ef\u9002\u5f53\u589e\u52a0 linger.ms \u53c2\u6570\u503c\u63d0\u5347\u541e\u5410\uff0c\u6bd4\u5982 10 \uff5e 100\u3002<\/section>\n<\/li>\n<\/ol>\n

                                        \u5728 Kafka \u7684\u751f\u4ea7\u8005\u5ba2\u6237\u7aef\u4e2d\uff0c\u5f53\u53d1\u9001\u6d88\u606f\u65f6\uff0c\u5982\u679c\u542f\u7528\u4e86\u6279\u91cf\u53d1\u9001\uff0cKafka \u4f1a\u5c06\u6d88\u606f\u7f13\u5b58\u5230\u7f13\u51b2\u533a\u4e2d\u3002\u5f53\u7f13\u51b2\u533a\u4e2d\u7684\u6d88\u606f\u5927\u5c0f\u8fbe\u5230 batch.size \u6216\u8005\u7b49\u5f85\u65f6\u95f4\u5230\u8fbe linger.ms \u65f6\uff0cKafka \u4f1a\u5c06\u7f13\u51b2\u533a\u4e2d\u7684\u6d88\u606f\u6253\u5305\u6210\u4e00\u4e2a\u6279\u6b21\u8fdb\u884c\u53d1\u9001\u3002\u5982\u679c\u5728\u7b49\u5f85\u65f6\u95f4\u5185\u6ca1\u6709\u8fbe\u5230 batch.size\uff0cKafka \u4e5f\u4f1a\u5c06\u7f13\u51b2\u533a\u4e2d\u7684\u6d88\u606f\u53d1\u9001\u51fa\u53bb\uff0c\u4ece\u800c\u907f\u514d\u6d88\u606f\u79ef\u538b\u3002<\/p>\n

                                        \u538b\u7f29\u6280\u672f<\/h4>\n

                                        Kafka \u652f\u6301\u538b\u7f29\u6280\u672f\uff0c\u901a\u8fc7\u5c06\u6d88\u606f\u8fdb\u884c\u538b\u7f29\u540e\u518d\u8fdb\u884c\u4f20\u8f93\uff0c\u4ece\u800c\u51cf\u5c11\u7f51\u7edc\u4f20\u8f93\u7684\u5f00\u9500(\u538b\u7f29\u548c\u89e3\u538b\u7f29\u7684\u8fc7\u7a0b\u4f1a\u6d88\u8017\u4e00\u5b9a\u7684 CPU \u8d44\u6e90\uff0c\u56e0\u6b64\u9700\u8981\u6839\u636e\u5b9e\u9645\u60c5\u51b5\u8fdb\u884c\u8c03\u6574\u3002)\uff0c\u63d0\u9ad8\u7f51\u7edc\u4f20\u8f93\u7684\u6548\u7387\u548c\u541e\u5410\u91cf\u3002Kafka \u652f\u6301\u591a\u79cd\u538b\u7f29\u7b97\u6cd5\uff0c\u5728 Kafka2.1.0 \u7248\u672c\u4e4b\u524d\uff0c\u4ec5\u652f\u6301 GZIP\uff0cSnappy \u548c LZ4\uff0c2.1.0 \u540e\u8fd8\u652f\u6301 Zstandard \u7b97\u6cd5\uff08Facebook \u5f00\u6e90\uff0c\u80fd\u591f\u63d0\u4f9b\u8d85\u9ad8\u538b\u7f29\u6bd4\uff09\u3002\u8fd9\u4e9b\u538b\u7f29\u7b97\u6cd5\u6027\u80fd\u5bf9\u6bd4\uff08\u4e24\u6307\u6807\u90fd\u662f\u8d8a\u9ad8\u8d8a\u597d\uff09\u5982\u4e0b\uff1a<\/p>\n

                                          \n
                                        • \n
                                          \u541e\u5410\u91cf\uff1aLZ4>Snappy>zstd \u548c GZIP\uff0c\u538b\u7f29\u6bd4\uff1azstd>LZ4>GZIP>Snappy\u3002<\/section>\n<\/li>\n<\/ul>\n

                                          \u5728 Kafka \u4e2d\uff0c\u538b\u7f29\u6280\u672f\u662f\u901a\u8fc7\u4ee5\u4e0b\u4e24\u4e2a\u53c2\u6570\u6765\u63a7\u5236\u7684\uff1a<\/p>\n

                                            \n
                                          1. \n
                                            compression.type\uff1a\u63a7\u5236\u538b\u7f29\u7b97\u6cd5\u7684\u7c7b\u578b\uff0c\u9ed8\u8ba4\u503c\u4e3a none\uff0c\u8868\u793a\u4e0d\u8fdb\u884c\u538b\u7f29\u3002<\/section>\n<\/li>\n
                                          2. \n
                                            compression.level\uff1a\u63a7\u5236\u538b\u7f29\u7684\u7ea7\u522b\uff0c\u53d6\u503c\u8303\u56f4\u4e3a 0-9\uff0c\u9ed8\u8ba4\u503c\u4e3a-1\u3002\u5f53\u503c\u4e3a-1 \u65f6\uff0c\u8868\u793a\u4f7f\u7528\u9ed8\u8ba4\u7684\u538b\u7f29\u7ea7\u522b\u3002<\/section>\n<\/li>\n<\/ol>\n

                                            \u5728 Kafka \u7684\u751f\u4ea7\u8005\u5ba2\u6237\u7aef\u4e2d\uff0c\u5f53\u53d1\u9001\u6d88\u606f\u65f6\uff0c\u5982\u679c\u542f\u7528\u4e86\u538b\u7f29\u6280\u672f\uff0cKafka \u4f1a\u5c06\u6d88\u606f\u8fdb\u884c\u538b\u7f29\u540e\u518d\u8fdb\u884c\u4f20\u8f93\u3002\u5728\u6d88\u8d39\u8005\u5ba2\u6237\u7aef\u4e2d\uff0c\u5982\u679c\u6d88\u606f\u8fdb\u884c\u4e86\u538b\u7f29\uff0cKafka \u4f1a\u5728\u6d88\u8d39\u6d88\u606f\u65f6\u5c06\u5176\u89e3\u538b\u7f29\u3002\u6ce8\u610f\uff1aBroker \u5982\u679c\u8bbe\u7f6e\u4e86\u548c\u751f\u4ea7\u8005\u4e0d\u901a\u7684\u538b\u7f29\u7b97\u6cd5\uff0c\u63a5\u6536\u6d88\u606f\u540e\u4f1a\u89e3\u538b\u540e\u91cd\u65b0\u538b\u7f29\u4fdd\u5b58\u3002Broker \u5982\u679c\u5b58\u5728\u6d88\u606f\u7248\u672c\u517c\u5bb9\u4e5f\u4f1a\u89e6\u53d1\u89e3\u538b\u540e\u518d\u538b\u7f29\u3002<\/p>\n

                                            Pagecache \u673a\u5236&\u987a\u5e8f\u8ffd\u52a0\u843d\u76d8<\/h4>\n

                                            kafka \u4e3a\u4e86\u63d0\u5347\u7cfb\u7edf\u541e\u5410\u3001\u964d\u4f4e\u65f6\u5ef6\uff0cBroker \u63a5\u6536\u5230\u6d88\u606f\u540e\u53ea\u662f\u5c06\u6570\u636e\u5199\u5165PageCache<\/strong>\u540e\u4fbf\u8ba4\u4e3a\u6d88\u606f\u5df2\u5199\u5165\u6210\u529f\uff0c\u800c PageCache \u4e2d\u7684\u6570\u636e\u901a\u8fc7 linux \u7684 flusher \u7a0b\u5e8f\u8fdb\u884c\u5f02\u6b65\u5237\u76d8\uff08\u907f\u514d\u4e86\u540c\u6b65\u5237\u76d8\u7684\u5de8\u5927\u7cfb\u7edf\u5f00\u9500\uff09\uff0c\u5c06\u6570\u636e\u987a\u5e8f\u8ffd\u52a0\u5199<\/strong>\u5230\u78c1\u76d8\u65e5\u5fd7\u6587\u4ef6\u4e2d\u3002\u7531\u4e8e pagecache \u662f\u5728\u5185\u5b58\u4e2d\u8fdb\u884c\u7f13\u5b58\uff0c\u56e0\u6b64\u8bfb\u5199\u901f\u5ea6\u975e\u5e38\u5feb\uff0c\u53ef\u4ee5\u5927\u5927\u63d0\u9ad8\u8bfb\u5199\u6548\u7387\u3002\u987a\u5e8f\u8ffd\u52a0\u5199\u5145\u5206\u5229\u7528\u987a\u5e8f I\/O \u5199\u64cd\u4f5c\uff0c\u907f\u514d\u4e86\u7f13\u6162\u7684\u968f\u673a I\/O \u64cd\u4f5c\uff0c\u53ef\u6709\u6548\u63d0\u5347 Kafka \u541e\u5410\u3002<\/p>\n

                                            \u5982\u4e0a\u56fe\u6240\u793a\uff0c\u6d88\u606f\u88ab\u987a\u5e8f\u8ffd\u52a0\u5230\u6bcf\u4e2a\u5206\u533a\u65e5\u5fd7\u6587\u4ef6\u7684\u5c3e\u90e8\u3002<\/p>\n

                                            \u96f6\u62f7\u8d1d<\/h4>\n

                                            Kafka \u4e2d\u5b58\u5728\u5927\u91cf\u7684\u7f51\u7edc\u6570\u636e\u6301\u4e45\u5316\u5230\u78c1\u76d8\uff08Producer \u5230 Broker\uff09\u548c\u78c1\u76d8\u6587\u4ef6\u901a\u8fc7\u7f51\u7edc\u53d1\u9001\uff08Broker \u5230 Consumer\uff09\u7684\u8fc7\u7a0b\uff0c\u8fd9\u4e00\u8fc7\u7a0b\u7684\u6027\u80fd\u76f4\u63a5\u5f71\u54cd Kafka \u7684\u6574\u4f53\u541e\u5410\u91cf\u3002\u4f20\u7edf\u7684 IO \u64cd\u4f5c\u5b58\u5728\u591a\u6b21\u6570\u636e\u62f7\u8d1d\u548c\u4e0a\u4e0b\u6587\u5207\u6362\uff0c\u6027\u80fd\u6bd4\u8f83\u4f4e\u3002Kafka \u5229\u7528\u96f6\u62f7\u8d1d\u6280\u672f\u63d0\u5347\u4e0a\u8ff0\u8fc7\u7a0b\u6027\u80fd\uff0c\u5176\u4e2d\u7f51\u7edc\u6570\u636e\u6301\u4e45\u5316\u78c1\u76d8\u4e3b\u8981\u7528 mmap \u6280\u672f\uff0c\u7f51\u7edc\u6570\u636e\u4f20\u8f93\u73af\u8282\u4e3b\u8981\u4f7f\u7528 sendfile \u6280\u672f\u3002<\/p>\n

                                            \u7d22\u5f15\u52a0\u901f\u4e4b mmap<\/span><\/h5>\n

                                            \u4f20\u7edf\u6a21\u5f0f\u4e0b\uff0c\u6570\u636e\u4ece\u7f51\u7edc\u4f20\u8f93\u5230\u6587\u4ef6\u9700\u8981 4 \u6b21\u6570\u636e\u62f7\u8d1d\u30014 \u6b21\u4e0a\u4e0b\u6587\u5207\u6362\u548c\u4e24\u6b21\u7cfb\u7edf\u8c03\u7528\u3002\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/p>\n

                                            \u4e3a\u4e86\u51cf\u5c11\u4e0a\u4e0b\u6587\u5207\u6362\u4ee5\u53ca\u6570\u636e\u62f7\u8d1d\u5e26\u6765\u7684\u6027\u80fd\u5f00\u9500\uff0cKafka\u4f7f\u7528mmap\u6765\u5904\u7406\u5176\u7d22\u5f15\u6587\u4ef6\u3002Kafka\u4e2d\u7684\u7d22\u5f15\u6587\u4ef6\u7528\u4e8e\u5728\u63d0\u53d6\u65e5\u5fd7\u6587\u4ef6\u4e2d\u7684\u6d88\u606f\u65f6\u8fdb\u884c\u9ad8\u6548\u67e5\u627e\u3002\u8fd9\u4e9b\u7d22\u5f15\u6587\u4ef6\u88ab\u7ef4\u62a4\u4e3a\u5185\u5b58\u6620\u5c04\u6587\u4ef6\uff0c\u8fd9\u5141\u8bb8Kafka\u5feb\u901f\u8bbf\u95ee\u548c\u641c\u7d22\u5185\u5b58\u4e2d\u7684\u7d22\u5f15\uff0c\u4ece\u800c\u52a0\u901f\u5728\u65e5\u5fd7\u6587\u4ef6\u4e2d\u5b9a\u4f4d\u6d88\u606f\u7684\u8fc7\u7a0b\u3002mmap \u5c06\u5185\u6838\u4e2d\u8bfb\u7f13\u51b2\u533a\uff08read buffer\uff09\u7684\u5730\u5740\u4e0e\u7528\u6237\u7a7a\u95f4\u7684\u7f13\u51b2\u533a\uff08user buffer\uff09\u8fdb\u884c\u6620\u5c04\uff0c\u4ece\u800c\u5b9e\u73b0\u5185\u6838\u7f13\u51b2\u533a\u4e0e\u5e94\u7528\u7a0b\u5e8f\u5185\u5b58\u7684\u5171\u4eab\uff0c\u7701\u53bb\u4e86\u5c06\u6570\u636e\u4ece\u5185\u6838\u8bfb\u7f13\u51b2\u533a\uff08read buffer\uff09\u62f7\u8d1d\u5230\u7528\u6237\u7f13\u51b2\u533a\uff08user buffer\uff09\u7684\u8fc7\u7a0b\uff0c\u6574\u4e2a\u62f7\u8d1d\u8fc7\u7a0b\u4f1a\u53d1\u751f 4 \u6b21\u4e0a\u4e0b\u6587\u5207\u6362\uff0c1 \u6b21CPU \u62f7\u8d1d\u548c 2\u6b21 DMA \u62f7\u8d1d\u3002<\/span><\/p>\n

                                            <\/span><\/p>\n

                                            <\/figure>\n
                                            \u7f51\u7edc\u6570\u636e\u4f20\u8f93\u4e4b sendfile<\/span><\/h5>\n

                                            \u4f20\u7edf\u65b9\u5f0f\u5b9e\u73b0\uff1a\u5148\u8bfb\u53d6\u78c1\u76d8\u3001\u518d\u7528 socket \u53d1\u9001\uff0c\u5b9e\u9645\u4e5f\u662f\u8fdb\u8fc7\u56db\u6b21 copy\u3002\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/p>\n

                                            \u4e3a\u4e86\u51cf\u5c11\u4e0a\u4e0b\u6587\u5207\u6362\u4ee5\u53ca\u6570\u636e\u62f7\u8d1d\u5e26\u6765\u7684\u6027\u80fd\u5f00\u9500\uff0cKafka \u5728 Consumer \u4ece Broker \u8bfb\u6570\u636e\u8fc7\u7a0b\u4e2d\u4f7f\u7528\u4e86 sendfile \u6280\u672f\u3002\u5177\u4f53\u5728\u8fd9\u91cc\u91c7\u7528\u7684\u65b9\u6848\u662f\u901a\u8fc7 NIO \u7684 transferTo\/transferFrom<\/code> \u8c03\u7528\u64cd\u4f5c\u7cfb\u7edf\u7684 sendfile \u5b9e\u73b0\u96f6\u62f7\u8d1d\u3002\u603b\u5171\u53d1\u751f 2 \u6b21\u5185\u6838\u6570\u636e\u62f7\u8d1d\u30012 \u6b21\u4e0a\u4e0b\u6587\u5207\u6362\u548c\u4e00\u6b21\u7cfb\u7edf\u8c03\u7528\uff0c\u6d88\u9664\u4e86 CPU \u6570\u636e\u62f7\u8d1d\uff0c\u5982\u4e0b\uff1a<\/p>\n

                                            \u7a00\u758f\u7d22\u5f15<\/h4>\n

                                            \u4e3a\u4e86\u65b9\u4fbf\u5bf9\u65e5\u5fd7\u8fdb\u884c\u68c0\u7d22\u548c\u8fc7\u671f\u6e05\u7406\uff0ckafka \u65e5\u5fd7\u6587\u4ef6\u9664\u4e86\u6709\u7528\u4e8e\u5b58\u50a8\u65e5\u5fd7\u7684.log \u6587\u4ef6\uff0c\u8fd8\u6709\u4e00\u4e2a\u4f4d\u79fb\u7d22\u5f15\u6587\u4ef6.index<\/strong>\u548c\u4e00\u4e2a\u65f6\u95f4\u6233\u7d22\u5f15\u6587\u4ef6.timeindex \u6587\u4ef6<\/strong>\uff0c\u5e76\u4e14\u4e09\u6587\u4ef6\u7684\u540d\u5b57\u5b8c\u5168\u76f8\u540c\uff0c\u5982\u4e0b\uff1a<\/p>\n

                                            Kafka \u7684\u7d22\u5f15\u6587\u4ef6\u662f\u6309\u7167\u7a00\u758f\u7d22\u5f15\u7684\u601d\u60f3\u8fdb\u884c\u8bbe\u8ba1\u7684\u3002\u7a00\u758f\u7d22\u5f15\u7684\u6838\u5fc3\u662f\u4e0d\u4f1a\u4e3a\u6bcf\u4e2a\u8bb0\u5f55\u90fd\u4fdd\u5b58\u7d22\u5f15\uff0c\u800c\u662f\u5199\u5165\u4e00\u5b9a\u7684\u8bb0\u5f55\u4e4b\u540e\u624d\u4f1a\u589e\u52a0\u4e00\u4e2a\u7d22\u5f15\u503c<\/strong>\uff0c\u5177\u4f53\u8fd9\u4e2a\u95f4\u9694\u6709\u591a\u5927\u5219\u901a\u8fc7 log.index.interval.bytes \u53c2\u6570\u8fdb\u884c\u63a7\u5236\uff0c\u9ed8\u8ba4\u5927\u5c0f\u4e3a 4 KB\uff0c\u610f\u5473\u7740 Kafka \u81f3\u5c11\u5199\u5165 4KB \u6d88\u606f\u6570\u636e\u4e4b\u540e\uff0c\u624d\u4f1a\u5728\u7d22\u5f15\u6587\u4ef6\u4e2d\u589e\u52a0\u4e00\u4e2a\u7d22\u5f15\u9879\u3002\u53ef\u89c1\uff0c\u5355\u6761\u6d88\u606f\u5927\u5c0f\u4f1a\u5f71\u54cd Kakfa \u7d22\u5f15\u7684\u63d2\u5165\u9891\u7387\uff0c\u56e0\u6b64 log.index.interval.bytes \u4e5f\u662f Kafka \u8c03\u4f18\u4e00\u4e2a\u91cd\u8981\u53c2\u6570\u503c\u3002\u7531\u4e8e\u7d22\u5f15\u6587\u4ef6\u4e5f\u662f\u6309\u7167\u6d88\u606f\u7684\u987a\u5e8f\u6027\u8fdb\u884c\u589e\u52a0\u7d22\u5f15\u9879\u7684\uff0c\u56e0\u6b64 Kafka \u53ef\u4ee5\u5229\u7528\u4e8c\u5206\u67e5\u627e\u7b97\u6cd5\u6765\u641c\u7d22\u76ee\u6807\u7d22\u5f15\u9879\uff0c\u628a\u65f6\u95f4\u590d\u6742\u5ea6\u964d\u5230\u4e86 O(lgN)\uff0c\u5927\u5927\u51cf\u5c11\u4e86\u67e5\u627e\u7684\u65f6\u95f4\u3002<\/p>\n

                                            \u4f4d\u79fb\u7d22\u5f15\u6587\u4ef6.index<\/strong><\/p>\n

                                            \u4f4d\u79fb\u7d22\u5f15\u6587\u4ef6\u7684\u7d22\u5f15\u9879\u7ed3\u6784\u5982\u4e0b\uff1a<\/p>\n

                                            \u76f8\u5bf9\u4f4d\u79fb<\/strong>\uff1a\u4fdd\u5b58\u4e8e\u7d22\u5f15\u6587\u4ef6\u540d\u5b57\u4e0a\u9762\u7684\u8d77\u59cb\u4f4d\u79fb\u7684\u5dee\u503c\uff0c\u5047\u8bbe\u4e00\u4e2a\u7d22\u5f15\u6587\u4ef6\u4e3a\uff1a00000000000000000100.index\uff0c\u90a3\u4e48\u8d77\u59cb\u4f4d\u79fb\u503c\u5373 100\uff0c\u5f53\u5b58\u50a8\u4f4d\u79fb\u4e3a 150 \u7684\u6d88\u606f\u7d22\u5f15\u65f6\uff0c\u5728\u7d22\u5f15\u6587\u4ef6\u4e2d\u7684\u76f8\u5bf9\u4f4d\u79fb\u5219\u4e3a 150 - 100 = 50\uff0c\u8fd9\u4e48\u505a\u7684\u597d\u5904\u662f\u4f7f\u7528 4 \u5b57\u8282\u4fdd\u5b58\u4f4d\u79fb\u5373\u53ef\uff0c\u53ef\u4ee5\u8282\u7701\u975e\u5e38\u591a\u7684\u78c1\u76d8\u7a7a\u95f4<\/strong>\u3002<\/p>\n

                                            \u6587\u4ef6\u7269\u7406\u4f4d\u7f6e<\/strong>\uff1a\u6d88\u606f\u5728 log \u6587\u4ef6\u4e2d\u4fdd\u5b58\u7684\u4f4d\u7f6e\uff0c\u4e5f\u5c31\u662f\u8bf4 Kafka \u53ef\u6839\u636e\u6d88\u606f\u4f4d\u79fb\uff0c\u901a\u8fc7\u4f4d\u79fb\u7d22\u5f15\u6587\u4ef6\u5feb\u901f\u627e\u5230\u6d88\u606f\u5728 log \u6587\u4ef6\u4e2d\u7684\u7269\u7406\u4f4d\u7f6e\uff0c\u6709\u4e86\u8be5\u7269\u7406\u4f4d\u7f6e\u7684\u503c\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u5feb\u901f\u5730\u4ece log \u6587\u4ef6\u4e2d\u627e\u5230\u5bf9\u5e94\u7684\u6d88\u606f\u4e86\u3002\u4e0b\u9762\u6211\u7528\u56fe\u6765\u8868\u793a Kafka \u662f\u5982\u4f55\u5feb\u901f\u68c0\u7d22\u6d88\u606f\uff1a<\/p>\n

                                            \u5047\u8bbe Kafka \u9700\u8981\u627e\u51fa\u4f4d\u79fb\u4e3a 3550 \u7684\u6d88\u606f\uff0c\u90a3\u4e48 Kafka \u9996\u5148\u4f1a\u4f7f\u7528\u4e8c\u5206\u67e5\u627e\u7b97\u6cd5\u627e\u5230\u5c0f\u4e8e 3550 \u7684\u6700\u5927\u7d22\u5f15\u9879\uff1a[3528, 2310272]\uff0c\u5f97\u5230\u7d22\u5f15\u9879\u4e4b\u540e\uff0cKafka \u4f1a\u6839\u636e\u8be5\u7d22\u5f15\u9879\u7684\u6587\u4ef6\u7269\u7406\u4f4d\u7f6e\u5728 log \u6587\u4ef6\u4e2d\u4ece\u4f4d\u7f6e 2310272 \u5f00\u59cb\u987a\u5e8f\u67e5\u627e\uff0c\u76f4\u81f3\u627e\u5230\u4f4d\u79fb\u4e3a 3550 \u7684\u6d88\u606f\u8bb0\u5f55\u4e3a\u6b62\u3002<\/p>\n

                                            \u65f6\u95f4\u6233\u7d22\u5f15\u6587\u4ef6.timeindex<\/strong><\/p>\n

                                            Kafka \u5728 0.10.0.0 \u4ee5\u540e\u7684\u7248\u672c\u5f53\u4e2d\uff0c\u6d88\u606f\u4e2d\u589e\u52a0\u4e86\u65f6\u95f4\u6233\u4fe1\u606f\uff0c\u4e3a\u4e86\u6ee1\u8db3\u7528\u6237\u9700\u8981\u6839\u636e\u65f6\u95f4\u6233\u67e5\u8be2\u6d88\u606f\u8bb0\u5f55\uff0cKafka \u589e\u52a0\u4e86\u65f6\u95f4\u6233\u7d22\u5f15\u6587\u4ef6\uff0c\u65f6\u95f4\u6233\u7d22\u5f15\u6587\u4ef6\u7684\u7d22\u5f15\u9879\u7ed3\u6784\u5982\u4e0b\uff1a<\/p>\n

                                            \u65f6\u95f4\u6233\u7d22\u5f15\u6587\u4ef6\u7684\u68c0\u7d22\u4e0e\u4f4d\u79fb\u7d22\u5f15\u6587\u4ef6\u7c7b\u4f3c\uff0c\u5982\u4e0b\u5feb\u901f\u68c0\u7d22\u6d88\u606f\u793a\u610f\u56fe\uff1a<\/p>\n

                                            broker & \u6570\u636e\u5206\u533a<\/span><\/h5>\n

                                            Kafka \u96c6\u7fa4\u5305\u542b\u591a\u4e2a broker\u3002\u4e00\u4e2a topic \u4e0b\u901a\u5e38\u6709\u591a\u4e2a partition\uff0cpartition \u5206\u5e03\u5728\u4e0d\u540c\u7684 Broker \u4e0a\uff0c\u7528\u4e8e\u5b58\u50a8 topic \u7684\u6d88\u606f\uff0c\u8fd9\u4f7f Kafka \u53ef\u4ee5\u5728\u591a\u53f0\u673a\u5668\u4e0a\u5904\u7406\u3001\u5b58\u50a8\u6d88\u606f\uff0c\u7ed9 kafka \u63d0\u4f9b\u7ed9\u4e86\u5e76\u884c\u7684\u6d88\u606f\u5904\u7406\u80fd\u529b\u548c\u6a2a\u5411\u6269\u5bb9\u80fd\u529b\u3002<\/p>\n

                                            \u591a reactor \u591a\u7ebf\u7a0b\u7f51\u7edc\u6a21\u578b<\/span><\/h5>\n

                                            \u591a Reactor \u591a\u7ebf\u7a0b\u7f51\u7edc\u6a21\u578b \u662f\u4e00\u79cd\u9ad8\u6548\u7684\u7f51\u7edc\u901a\u4fe1\u6a21\u578b\uff0c\u53ef\u4ee5\u5145\u5206\u5229\u7528\u591a\u6838 CPU \u7684\u6027\u80fd\uff0c\u63d0\u9ad8\u7cfb\u7edf\u7684\u541e\u5410\u91cf\u548c\u54cd\u5e94\u901f\u5ea6\u3002Kafka \u4e3a\u4e86\u63d0\u5347\u7cfb\u7edf\u7684\u541e\u5410\uff0c\u5728 Broker \u7aef\u5904\u7406\u6d88\u606f\u65f6\u91c7\u7528\u4e86\u8be5\u6a21\u578b\uff0c\u793a\u610f\u5982\u4e0b\uff1a<\/p>\n

                                            SocketServer<\/strong>\u548cKafkaRequestHandlerPool<\/strong>\u662f\u5176\u4e2d\u6700\u91cd\u8981\u7684\u4e24\u4e2a\u7ec4\u4ef6\uff1a<\/p>\n

                                              \n
                                            • \n
                                              SocketServer\uff1a\u5b9e\u73b0 Reactor \u6a21\u5f0f\uff0c\u7528\u4e8e\u5904\u7406\u591a\u4e2a Client\uff08\u5305\u62ec\u5ba2\u6237\u7aef\u548c\u5176\u4ed6 broker \u8282\u70b9\uff09\u7684\u5e76\u53d1\u8bf7\u6c42\uff0c\u5e76\u5c06\u5904\u7406\u7ed3\u679c\u8fd4\u56de\u7ed9 Client<\/section>\n<\/li>\n
                                            • \n
                                              KafkaRequestHandlerPool\uff1aReactor \u6a21\u5f0f\u4e2d\u7684 Worker \u7ebf\u7a0b\u6c60\uff0c\u91cc\u9762\u5b9a\u4e49\u4e86\u591a\u4e2a\u5de5\u4f5c\u7ebf\u7a0b\uff0c\u7528\u4e8e\u5904\u7406\u5b9e\u9645\u7684 I\/O \u8bf7\u6c42\u903b\u8f91\u3002<\/section>\n<\/li>\n<\/ul>\n

                                              \u6574\u4e2a\u670d\u52a1\u7aef\u5904\u7406\u8bf7\u6c42\u7684\u6d41\u7a0b\u5927\u81f4\u5206\u4e3a\u4ee5\u4e0b\u51e0\u4e2a\u6b65\u9aa4\uff1a<\/strong><\/p>\n

                                                \n
                                              1. \n
                                                Acceptor \u63a5\u6536\u5ba2\u6237\u7aef\u53d1\u6765\u7684\u8bf7\u6c42<\/section>\n<\/li>\n
                                              2. \n
                                                \u8f6e\u8be2\u5206\u53d1\u7ed9 Processor \u7ebf\u7a0b\u5904\u7406<\/section>\n<\/li>\n
                                              3. \n
                                                Processor \u5c06\u8bf7\u6c42\u5c01\u88c5\u6210 Request \u5bf9\u8c61\uff0c\u653e\u5230 RequestQueue \u961f\u5217<\/section>\n<\/li>\n
                                              4. \n
                                                KafkaRequestHandlerPool \u5206\u914d\u5de5\u4f5c\u7ebf\u7a0b\uff0c\u5904\u7406 RequestQueue \u4e2d\u7684\u8bf7\u6c42<\/section>\n<\/li>\n
                                              5. \n
                                                KafkaRequestHandler \u7ebf\u7a0b\u5904\u7406\u5b8c\u8bf7\u6c42\u540e\uff0c\u5c06\u54cd\u5e94 Response \u8fd4\u56de\u7ed9 Processor \u7ebf\u7a0b<\/section>\n<\/li>\n
                                              6. \n
                                                Processor \u7ebf\u7a0b\u5c06\u54cd\u5e94\u8fd4\u56de\u7ed9\u5ba2\u6237\u7aef<\/section>\n<\/li>\n<\/ol>\n

                                                <\/section>\n

                                                \u5176\u4ed6\u77e5\u8bc6\u63a2\u7a76<\/span><\/h3>\n

                                                \u8d1f\u8f7d\u5747\u8861<\/h4>\n

                                                \u751f\u4ea7\u8005\u8d1f\u8f7d\u5747\u8861<\/span><\/h5>\n

                                                Kafka \u751f\u4ea7\u7aef\u7684\u8d1f\u8f7d\u5747\u8861\u4e3b\u8981\u6307\u5982\u4f55\u5c06\u6d88\u606f\u53d1\u9001\u5230\u5408\u9002\u7684\u5206\u533a\u3002Kafka \u751f\u4ea7\u8005\u751f\u4ea7\u6d88\u606f\u65f6\uff0c\u6839\u636e\u5206\u533a\u5668\u5c06\u6d88\u606f\u6295\u9012\u5230\u6307\u5b9a\u7684\u5206\u533a\u4e2d\uff0c\u6240\u4ee5 Kafka \u7684\u8d1f\u8f7d\u5747\u8861\u5f88\u5927\u7a0b\u5ea6\u4e0a\u4f9d\u8d56\u4e8e\u5206\u533a\u5668\u3002Kafka \u9ed8\u8ba4\u7684\u5206\u533a\u5668\u662f Kafka \u63d0\u4f9b\u7684 DefaultPartitioner\u3002\u5b83\u7684\u5206\u533a\u7b56\u7565\u662f\u6839\u636e Key \u503c\u8fdb\u884c\u5206\u533a\u5206\u914d\u7684\uff1a<\/p>\n

                                                  \n
                                                • \n
                                                  \u5982\u679c key \u4e0d\u4e3a null<\/strong>\uff1a\u5bf9 Key \u503c\u8fdb\u884c Hash \u8ba1\u7b97\uff0c\u4ece\u6240\u6709\u5206\u533a<\/strong>\u4e2d\u6839\u636e Key \u7684 Hash \u503c\u8ba1\u7b97\u51fa\u4e00\u4e2a\u5206\u533a\u53f7\uff1b\u62e5\u6709\u76f8\u540c Key \u503c\u7684\u6d88\u606f\u88ab\u5199\u5165\u540c\u4e00\u4e2a\u5206\u533a\uff0c\u987a\u5e8f\u6d88\u606f\u5b9e\u73b0\u7684\u5173\u952e<\/strong>\uff1b<\/section>\n<\/li>\n
                                                • \n
                                                  \u5982\u679c key \u4e3a null<\/strong>\uff1a\u6d88\u606f\u5c06\u4ee5\u8f6e\u8be2<\/strong>\u7684\u65b9\u5f0f\uff0c\u5728\u6240\u6709\u53ef\u7528\u5206\u533a<\/strong>\u4e2d\u5206\u522b\u5199\u5165\u6d88\u606f\u3002\u5982\u679c\u4e0d\u60f3\u4f7f\u7528 Kafka \u9ed8\u8ba4\u7684\u5206\u533a\u5668\uff0c\u7528\u6237\u53ef\u4ee5\u5b9e\u73b0 Partitioner \u63a5\u53e3\uff0c\u81ea\u884c\u5b9e\u73b0\u5206\u533a\u65b9\u6cd5\u3002<\/section>\n<\/li>\n<\/ul>\n
                                                  \u6d88\u8d39\u8005\u8d1f\u8f7d\u5747\u8861<\/span><\/h5>\n

                                                  \u5728 Kafka \u4e2d\uff0c\u6bcf\u4e2a\u5206\u533a\uff08Partition\uff09\u53ea\u80fd\u7531\u4e00\u4e2a\u6d88\u8d39\u8005\u7ec4\u4e2d\u7684\u4e00\u4e2a\u6d88\u8d39\u8005\u6d88\u8d39\u3002\u5f53\u6d88\u8d39\u8005\u7ec4\u4e2d\u6709\u591a\u4e2a\u6d88\u8d39\u8005\u65f6\uff0cKafka \u4f1a\u81ea\u52a8\u8fdb\u884c\u8d1f\u8f7d\u5747\u8861\uff0c\u5c06\u5206\u533a\u5747\u5300\u5730\u5206\u914d\u7ed9\u6bcf\u4e2a\u6d88\u8d39\u8005\u3002\u5728 Kafka \u4e2d\uff0c\u6d88\u8d39\u8005\u8d1f\u8f7d\u5747\u8861\u7b97\u6cd5\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u6d88\u8d39\u8005\u7ec4\u7684 partition.assignment.strategy \u53c2\u6570\u6765\u9009\u62e9\u3002\u76ee\u524d\u4e3b\u6d41\u7684\u5206\u533a\u5206\u914d\u7b56\u7565\u4ee5\u4e0b\u51e0\u79cd\uff1a<\/p>\n

                                                    \n
                                                  • \n
                                                    range:<\/strong> \u5728\u4fdd\u8bc1\u5747\u8861\u7684\u524d\u63d0\u4e0b\uff0c\u5c06\u8fde\u7eed\u7684\u5206\u533a\u5206\u914d\u7ed9\u6d88\u8d39\u8005\uff0c\u5bf9\u5e94\u7684\u5b9e\u73b0\u662f RangeAssignor\uff1b<\/section>\n<\/li>\n
                                                  • \n
                                                    round-robin\uff1a<\/strong>\u5728\u4fdd\u8bc1\u5747\u8861\u7684\u524d\u63d0\u4e0b\uff0c\u8f6e\u8be2\u5206\u914d\uff0c\u5bf9\u5e94\u7684\u5b9e\u73b0\u662f RoundRobinAssignor\uff1b<\/section>\n<\/li>\n
                                                  • \n
                                                    0.11.0.0 \u7248\u672c\u5f15\u5165\u4e86\u4e00\u79cd\u65b0\u7684\u5206\u533a\u5206\u914d\u7b56\u7565 StickyAssignor\uff0c\u5176\u4f18\u52bf\u5728\u4e8e\u80fd\u591f\u4fdd\u8bc1\u5206\u533a\u5747\u8861\u7684\u524d\u63d0\u4e0b\u5c3d\u91cf\u4fdd\u6301\u539f\u6709\u7684\u5206\u533a\u5206\u914d\u7ed3\u679c\uff0c\u4ece\u800c\u907f\u514d\u8bb8\u591a\u5197\u4f59\u7684\u5206\u533a\u5206\u914d\u64cd\u4f5c\uff0c\u51cf\u5c11\u5206\u533a\u518d\u5206\u914d\u7684\u6267\u884c\u65f6\u95f4\u3002<\/section>\n<\/li>\n<\/ul>\n

                                                    \u96c6\u7fa4\u7ba1\u7406<\/h4>\n

                                                    Kafka \u501f\u52a9 ZooKeeper \u8fdb\u884c\u96c6\u7fa4\u7ba1\u7406\u3002Kafka \u4e2d\u5f88\u591a\u4fe1\u606f\u90fd\u5728 ZK \u4e2d\u7ef4\u62a4\uff0c\u5982 broker \u96c6\u7fa4\u4fe1\u606f\u3001consumer \u96c6\u7fa4\u4fe1\u606f\u3001 topic \u76f8\u5173\u4fe1\u606f\u3001 partition \u4fe1\u606f\u7b49\u3002Kafka \u7684\u5f88\u591a\u529f\u80fd\u4e5f\u662f\u57fa\u4e8e ZK \u5b9e\u73b0\u7684\uff0c\u5982 partition \u9009\u4e3b\u3001broker \u96c6\u7fa4\u7ba1\u7406\u3001consumer \u8d1f\u8f7d\u5747\u8861\u7b49\uff0c\u9650\u4e8e\u7bc7\u5e45\u672c\u6587\u5c06\u4e0d\u5c55\u5f00\u9648\u8ff0\uff0c\u8fd9\u91cc\u5148\u9644\u4e00\u5f20\u7f51\u4e0a\u622a\u56fe\u5927\u5bb6\u611f\u53d7\u4e0b\uff1a<\/p>\n

                                                    \u53c2\u8003\u6587\u732e<\/strong><\/p>\n

                                                      \n
                                                    1. \n
                                                      https:\/\/www.cnblogs.com\/arvinhuang\/p\/16437948.html<\/span><\/section>\n<\/li>\n
                                                    2. \n
                                                      https:\/\/segmentfault.com\/a\/1190000039133960<\/span><\/section>\n<\/li>\n
                                                    3. \n
                                                      http:\/\/matt33.com\/2018\/11\/04\/kafka-transaction\/<\/span><\/section>\n<\/li>\n
                                                    4. \n
                                                      https:\/\/blog.51cto.com\/u_14020077\/5836698<\/span><\/section>\n<\/li>\n
                                                    5. \n
                                                      https:\/\/t1mek1ller.github.io\/2020\/02\/15\/kafka-leader-epoch\/<\/span><\/section>\n<\/li>\n
                                                    6. \n
                                                      https:\/\/cwiki.apache.org\/confluence\/display\/KAFKA\/KIP-101+-+Alter+Replication+Protocol+to+use+Leader+Epoch+rather+than+High+Watermark+for+Truncation<\/span><\/section>\n<\/li>\n
                                                    7. \n
                                                      https:\/\/xie.infoq.cn\/article\/c06fea629926e2b6a8073e2f0<\/span><\/section>\n<\/li>\n
                                                    8. \n
                                                      https:\/\/xie.infoq.cn\/article\/8191412c8da131e78cbfa6600<\/span><\/section>\n<\/li>\n
                                                    9. \n
                                                      https:\/\/mp.weixin.qq.com\/s\/iEk0loXsKsMO_OCVlUsk2Q<\/span><\/section>\n<\/li>\n
                                                    10. \n
                                                      https:\/\/cloud.tencent.com\/developer\/article\/1657649<\/span><\/section>\n<\/li>\n
                                                    11. \n
                                                      https:\/\/www.cnblogs.com\/vivotech\/p\/16347074.html<\/span><\/section>\n<\/li>\n<\/ol>\n
                                                      <\/mp-common-profile><\/section>\n
                                                      \u5982\u559c\u6b22\u672c\u6587\uff0c\u8bf7\u70b9\u51fb\u53f3\u4e0a\u89d2\uff0c\u628a\u6587\u7ae0\u5206\u4eab\u5230\u670b\u53cb\u5708
                                                      <\/span><\/p>
                                                      \u56e0\u516c\u4f17\u53f7\u66f4\u6539\u63a8\u9001\u89c4\u5219\uff0c\u8bf7\u70b9\u201c\u5728\u770b\u201d\u5e76\u52a0\u201c\u661f\u6807\u201d\u7b2c\u4e00\u65f6\u95f4\u83b7\u53d6\u7cbe\u5f69\u6280\u672f\u5206\u4eab<\/span><\/span><\/strong><\/p>
                                                      \u00b7END\u00b7<\/strong><\/p><\/pre>\n
                                                      <\/mp-style-type><\/p>\n
                                                      \n
                                                      \u672c\u7bc7\u6587\u7ae0\u6765\u6e90\u4e8e\u5fae\u4fe1\u516c\u4f17\u53f7:                 IT\u725b\u5ba2              <\/p>\n<\/blockquote>\n<\/div>\n","raw":"","protected":false},"excerpt":{"rendered":"
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