{"id":615,"date":"2020-04-21T18:18:43","date_gmt":"2020-04-21T10:18:43","guid":{"rendered":"https:\/\/www.aiqinqin.info\/?p=615"},"modified":"2020-04-24T16:35:14","modified_gmt":"2020-04-24T08:35:14","slug":"kafka-%e6%a6%82%e8%bf%b0%ef%bc%9a%e6%b7%b1%e5%85%a5%e7%90%86%e8%a7%a3%e6%9e%b6%e6%9e%84%e8%bd%ac%e8%bd%bd","status":"publish","type":"post","link":"https:\/\/www.aiqinqin.info\/?p=615","title":{"rendered":"Kafka \u6982\u8ff0\uff1a\u6df1\u5165\u7406\u89e3\u67b6\u6784[\u8f6c\u8f7d]"},"content":{"rendered":"

\n \u539f\u5730\u5740\uff1a https:\/\/juejin.im\/post\/5e217c3fe51d450200787f23\n<\/p><\/blockquote>\n

\u2003\u2003\u672c\u6587\u4e3b\u8981\u8bb2\u89e3 Kafka \u662f\u4ec0\u4e48\u3001Kafka \u7684\u67b6\u6784\u5305\u62ec\u5de5\u4f5c\u6d41\u7a0b\u548c\u5b58\u50a8\u673a\u5236\uff0c\u4ee5\u53ca\u751f\u4ea7\u8005\u548c\u6d88\u8d39\u8005\uff0c\u6700\u7ec8\u5927\u5bb6\u4f1a\u638c\u63e1 Kafka \u4e2d\u6700\u91cd\u8981\u7684\u6982\u5ff5\uff0c\u5206\u522b\u662f broker\u3001producer\u3001consumer\u3001consumer group\u3001topic\u3001partition\u3001replica\u3001leader\u3001follower\uff0c\u8fd9\u662f\u5b66\u4f1a\u548c\u7406\u89e3 Kafka \u7684\u57fa\u7840\u548c\u5fc5\u5907\u5185\u5bb9\u3002<\/p>\n

\u5b9a\u4e49<\/h5>\n

\u2003\u2003Kafka \u662f\u4e00\u4e2a\u5206\u5e03\u5f0f\u7684\u57fa\u4e8e\u53d1\u5e03\/\u8ba2\u9605\u6a21\u5f0f\u7684\u6d88\u606f\u961f\u5217\uff08Message Queue\uff09\uff0c\u4e3b\u8981\u5e94\u7528\u4e0e\u5927\u6570\u636e\u5b9e\u65f6\u5904\u7406\u9886\u57df\u3002<\/p>\n

\u6d88\u606f\u961f\u5217<\/h6>\n

\u2003\u2003Kafka \u672c\u8d28\u4e0a\u662f\u4e00\u4e2a MQ\uff08Message Queue\uff09\uff0c\u4f7f\u7528\u6d88\u606f\u961f\u5217\u7684\u597d\u5904\uff1f \uff08\u9762\u8bd5\u4f1a\u95ee\uff09<\/p>\n

    \n
  1. \u89e3\u8026\uff1a\u5141\u8bb8\u6211\u4eec\u72ec\u7acb\u7684\u6269\u5c55\u6216\u4fee\u6539\u961f\u5217\u4e24\u8fb9\u7684\u5904\u7406\u8fc7\u7a0b\u3002<\/li>\n
  2. \u53ef\u6062\u590d\u6027\uff1a\u5373\u4f7f\u4e00\u4e2a\u5904\u7406\u6d88\u606f\u7684\u8fdb\u7a0b\u6302\u6389\uff0c\u52a0\u5165\u961f\u5217\u4e2d\u7684\u6d88\u606f\u4ecd\u7136\u53ef\u4ee5\u5728\u7cfb\u7edf\u6062\u590d\u540e\u88ab\u5904\u7406\u3002<\/li>\n
  3. \u7f13\u51b2\uff1a\u6709\u52a9\u4e8e\u89e3\u51b3\u751f\u4ea7\u6d88\u606f\u548c\u6d88\u8d39\u6d88\u606f\u7684\u5904\u7406\u901f\u5ea6\u4e0d\u4e00\u81f4\u7684\u60c5\u51b5\u3002<\/li>\n
  4. \u7075\u6d3b\u6027&\u5cf0\u503c\u5904\u7406\u80fd\u529b\uff1a\u4e0d\u4f1a\u56e0\u4e3a\u7a81\u53d1\u7684\u8d85\u8d1f\u8377\u7684\u8bf7\u6c42\u800c\u5b8c\u5168\u5d29\u6e83\uff0c\u6d88\u606f\u961f\u5217\u80fd\u591f\u4f7f\u5173\u952e\u7ec4\u4ef6\u9876\u4f4f\u7a81\u53d1\u7684\u8bbf\u95ee\u538b\u529b\u3002<\/li>\n
  5. \u5f02\u6b65\u901a\u4fe1\uff1a\u6d88\u606f\u961f\u5217\u5141\u8bb8\u7528\u6237\u628a\u6d88\u606f\u653e\u5165\u961f\u5217\u4f46\u4e0d\u7acb\u5373\u5904\u7406\u5b83\u3002<\/li>\n<\/ol>\n
    \u53d1\u5e03\/\u8ba2\u9605\u6a21\u5f0f<\/h6>\n

    \"\"
    \n\u2003\u2003\u4e00\u5bf9\u591a\uff0c\u751f\u4ea7\u8005\u5c06\u6d88\u606f\u53d1\u5e03\u5230 topic \u4e2d\uff0c\u6709\u591a\u4e2a\u6d88\u8d39\u8005\u8ba2\u9605\u8be5\u4e3b\u9898\uff0c\u53d1\u5e03\u5230 topic \u7684\u6d88\u606f\u4f1a\u88ab\u6240\u6709\u8ba2\u9605\u8005\u6d88\u8d39\uff0c\u88ab\u6d88\u8d39\u7684\u6570\u636e\u4e0d\u4f1a\u7acb\u5373\u4ece topic \u6e05\u9664\u3002<\/p>\n

    \u67b6\u6784<\/h5>\n

    \"\"
    \n\u2003\u2003Kafka \u5b58\u50a8\u7684\u6d88\u606f\u6765\u81ea\u4efb\u610f\u591a\u88ab\u79f0\u4e3a Producer \u751f\u4ea7\u8005\u7684\u8fdb\u7a0b\u3002\u6570\u636e\u4ece\u800c\u53ef\u4ee5\u88ab\u53d1\u5e03\u5230\u4e0d\u540c\u7684 Topic \u4e3b\u9898\u4e0b\u7684\u4e0d\u540c Partition \u5206\u533a\u3002\u5728\u4e00\u4e2a\u5206\u533a\u5185\uff0c\u8fd9\u4e9b\u6d88\u606f\u88ab\u7d22\u5f15\u5e76\u8fde\u540c\u65f6\u95f4\u6233\u5b58\u50a8\u5728\u4e00\u8d77\u3002\u5176\u5b83\u88ab\u79f0\u4e3a Consumer \u6d88\u8d39\u8005\u7684\u8fdb\u7a0b\u53ef\u4ee5\u4ece\u5206\u533a\u8ba2\u9605\u6d88\u606f\u3002Kafka \u8fd0\u884c\u5728\u4e00\u4e2a\u7531\u4e00\u53f0\u6216\u591a\u53f0\u670d\u52a1\u5668\u7ec4\u6210\u7684\u96c6\u7fa4\u4e0a\uff0c\u5e76\u4e14\u5206\u533a\u53ef\u4ee5\u8de8\u96c6\u7fa4\u7ed3\u70b9\u5206\u5e03\u3002\u4e0b\u9762\u7ed9\u51fa Kafka \u4e00\u4e9b\u91cd\u8981\u6982\u5ff5\uff0c\u8ba9\u5927\u5bb6\u5bf9 Kafka \u6709\u4e2a\u6574\u4f53\u7684\u8ba4\u8bc6\u548c\u611f\u77e5\uff0c\u540e\u9762\u8fd8\u4f1a\u8be6\u7ec6\u7684\u89e3\u6790\u6bcf\u4e00\u4e2a\u6982\u5ff5\u7684\u4f5c\u7528\u4ee5\u53ca\u66f4\u6df1\u5165\u7684\u539f\u7406\u3002<\/p>\n

      \n
    • Producer\uff1a \u6d88\u606f\u751f\u4ea7\u8005\uff0c\u5411 Kafka Broker \u53d1\u6d88\u606f\u7684\u5ba2\u6237\u7aef\u3002<\/li>\n
    • Consumer\uff1a \u6d88\u606f\u6d88\u8d39\u8005\uff0c\u4ece Kafka Broker \u53d6\u6d88\u606f\u7684\u5ba2\u6237\u7aef\u3002<\/li>\n
    • Consumer Group\uff1a \u6d88\u8d39\u8005\u7ec4\uff08CG\uff09\uff0c\u6d88\u8d39\u8005\u7ec4\u5185\u6bcf\u4e2a\u6d88\u8d39\u8005\u8d1f\u8d23\u6d88\u8d39\u4e0d\u540c\u5206\u533a\u7684\u6570\u636e\uff0c\u63d0\u9ad8\u6d88\u8d39\u80fd\u529b\u3002\u4e00\u4e2a\u5206\u533a\u53ea\u80fd\u7531\u7ec4\u5185\u4e00\u4e2a\u6d88\u8d39\u8005\u6d88\u8d39\uff0c\u6d88\u8d39\u8005\u7ec4\u4e4b\u95f4\u4e92\u4e0d\u5f71\u54cd\u3002\u6240\u6709\u7684\u6d88\u8d39\u8005\u90fd\u5c5e\u4e8e\u67d0\u4e2a\u6d88\u8d39\u8005\u7ec4\uff0c\u5373\u6d88\u8d39\u8005\u7ec4\u662f\u903b\u8f91\u4e0a\u7684\u4e00\u4e2a\u8ba2\u9605\u8005\u3002<\/li>\n
    • Broker\uff1a \u4e00\u53f0 Kafka \u673a\u5668\u5c31\u662f\u4e00\u4e2a broker\u3002\u4e00\u4e2a\u96c6\u7fa4\u7531\u591a\u4e2a broker \u7ec4\u6210\u3002\u4e00\u4e2a broker \u53ef\u4ee5\u5bb9\u7eb3\u591a\u4e2a topic\u3002<\/li>\n
    • Topic\uff1a \u53ef\u4ee5\u7406\u89e3\u4e3a\u4e00\u4e2a\u961f\u5217\uff0ctopic \u5c06\u6d88\u606f\u5206\u7c7b\uff0c\u751f\u4ea7\u8005\u548c\u6d88\u8d39\u8005\u9762\u5411\u7684\u662f\u540c\u4e00\u4e2a topic\u3002<\/li>\n
    • Partition\uff1a \u4e3a\u4e86\u5b9e\u73b0\u6269\u5c55\u6027\uff0c\u63d0\u9ad8\u5e76\u53d1\u80fd\u529b\uff0c\u4e00\u4e2a\u975e\u5e38\u5927\u7684 topic \u53ef\u4ee5\u5206\u5e03\u5230\u591a\u4e2a broker \uff08\u5373\u670d\u52a1\u5668\uff09\u4e0a\uff0c\u4e00\u4e2a topic \u53ef\u4ee5\u5206\u4e3a\u591a\u4e2a partition\uff0c\u6bcf\u4e2a partition \u662f\u4e00\u4e2a \u6709\u5e8f\u7684\u961f\u5217\u3002<\/li>\n
    • Replica\uff1a \u526f\u672c\uff0c\u4e3a\u5b9e\u73b0\u5907\u4efd\u7684\u529f\u80fd\uff0c\u4fdd\u8bc1\u96c6\u7fa4\u4e2d\u7684\u67d0\u4e2a\u8282\u70b9\u53d1\u751f\u6545\u969c\u65f6\uff0c\u8be5\u8282\u70b9\u4e0a\u7684 partition \u6570\u636e\u4e0d\u4e22\u5931\uff0c\u4e14 Kafka \u4ecd\u7136\u80fd\u591f\u7ee7\u7eed\u5de5\u4f5c\uff0cKafka \u63d0\u4f9b\u4e86\u526f\u672c\u673a\u5236\uff0c\u4e00\u4e2a topic \u7684\u6bcf\u4e2a\u5206\u533a\u90fd\u6709\u82e5\u5e72\u4e2a\u526f\u672c\uff0c\u4e00\u4e2a leader \u548c\u82e5\u5e72\u4e2a follower\u3002<\/li>\n
    • Leader\uff1a \u6bcf\u4e2a\u5206\u533a\u591a\u4e2a\u526f\u672c\u7684\u201c\u4e3b\u201d\u526f\u672c\uff0c\u751f\u4ea7\u8005\u53d1\u9001\u6570\u636e\u7684\u5bf9\u8c61\uff0c\u4ee5\u53ca\u6d88\u8d39\u8005\u6d88\u8d39\u6570\u636e\u7684\u5bf9\u8c61\uff0c\u90fd\u662f leader\u3002<\/li>\n
    • Follower\uff1a \u6bcf\u4e2a\u5206\u533a\u591a\u4e2a\u526f\u672c\u7684\u201c\u4ece\u201d\u526f\u672c\uff0c\u5b9e\u65f6\u4ece leader \u4e2d\u540c\u6b65\u6570\u636e\uff0c\u4fdd\u6301\u548c leader \u6570\u636e\u7684\u540c\u6b65\u3002leader \u53d1\u751f\u6545\u969c\u65f6\uff0c\u67d0\u4e2a follower \u8fd8\u4f1a\u6210\u4e3a\u65b0\u7684 leader\u3002<\/li>\n
    • offset\uff1a \u6d88\u8d39\u8005\u6d88\u8d39\u7684\u4f4d\u7f6e\u4fe1\u606f\uff0c\u76d1\u63a7\u6570\u636e\u6d88\u8d39\u5230\u4ec0\u4e48\u4f4d\u7f6e\uff0c\u5f53\u6d88\u8d39\u8005\u6302\u6389\u518d\u91cd\u65b0\u6062\u590d\u7684\u65f6\u5019\uff0c\u53ef\u4ee5\u4ece\u6d88\u8d39\u4f4d\u7f6e\u7ee7\u7eed\u6d88\u8d39\u3002<\/li>\n
    • Zookeeper\uff1a Kafka \u96c6\u7fa4\u80fd\u591f\u6b63\u5e38\u5de5\u4f5c\uff0c\u9700\u8981\u4f9d\u8d56\u4e8e zookeeper\uff0czookeeper \u5e2e\u52a9 Kafka \u5b58\u50a8\u548c\u7ba1\u7406\u96c6\u7fa4\u4fe1\u606f\u3002<\/li>\n<\/ul>\n
      \u5de5\u4f5c\u6d41\u7a0b<\/h5>\n

      \u2003\u2003Kafka\u96c6\u7fa4\u5c06 Record \u6d41\u5b58\u50a8\u5728\u79f0\u4e3a topic \u7684\u7c7b\u522b\u4e2d\uff0c\u6bcf\u4e2a\u8bb0\u5f55\u7531\u4e00\u4e2a\u952e\u3001\u4e00\u4e2a\u503c\u548c\u4e00\u4e2a\u65f6\u95f4\u6233\u7ec4\u6210\u3002Kafka \u662f\u4e00\u4e2a\u5206\u5e03\u5f0f\u6d41\u5e73\u53f0\uff0c\u8fd9\u5230\u5e95\u662f\u4ec0\u4e48\u610f\u601d\uff1f<\/p>\n

        \n
      • \u53d1\u5e03\u548c\u8ba2\u9605\u8bb0\u5f55\u6d41\uff0c\u7c7b\u4f3c\u4e8e\u6d88\u606f\u961f\u5217\u6216\u4f01\u4e1a\u6d88\u606f\u4f20\u9012\u7cfb\u7edf\u3002<\/li>\n
      • \u4ee5\u5bb9\u9519\u7684\u6301\u4e45\u65b9\u5f0f\u5b58\u50a8\u8bb0\u5f55\u6d41\u3002<\/li>\n
      • \u5904\u7406\u8bb0\u5f55\u6d41\u3002
        \n\"\"
        \n\u2003\u2003Kafka \u4e2d\u6d88\u606f\u662f\u4ee5 topic \u8fdb\u884c\u5206\u7c7b\u7684\uff0c\u751f\u4ea7\u8005\u751f\u4ea7\u6d88\u606f\uff0c\u6d88\u8d39\u8005\u6d88\u8d39\u6d88\u606f\uff0c\u9762\u5411\u7684\u90fd\u662f\u540c\u4e00\u4e2a topic\u3002topic \u662f\u903b\u8f91\u4e0a\u7684\u6982\u5ff5\uff0c\u800c partition \u662f\u7269\u7406\u4e0a\u7684\u6982\u5ff5\uff0c\u6bcf\u4e2a partition \u5bf9\u5e94\u4e8e\u4e00\u4e2a log \u6587\u4ef6\uff0c\u8be5 log \u6587\u4ef6\u4e2d\u5b58\u50a8\u7684\u5c31\u662f Producer \u751f\u4ea7\u7684\u6570\u636e\u3002Producer \u751f\u4ea7\u7684\u6570\u636e\u4f1a\u4e0d\u65ad\u8ffd\u52a0\u5230\u8be5 log \u6587\u4ef6\u672b\u7aef\uff0c\u4e14\u6bcf\u6761\u6570\u636e\u90fd\u6709\u81ea\u5df1\u7684 offset\u3002\u6d88\u8d39\u8005\u7ec4\u4e2d\u7684\u6bcf\u4e2a\u6d88\u8d39\u8005\uff0c\u90fd\u4f1a\u5b9e\u65f6\u8bb0\u5f55\u81ea\u5df1\u6d88\u8d39\u5230\u4e86\u54ea\u4e2a offset\uff0c\u4ee5\u4fbf\u51fa\u9519\u6062\u590d\u65f6\uff0c\u4ece\u4e0a\u6b21\u7684\u4f4d\u7f6e\u7ee7\u7eed\u6d88\u8d39\u3002<\/li>\n<\/ul>\n
        \u5b58\u50a8\u673a\u5236<\/h5>\n

        \"\"
        \n\u2003\u2003\u7531\u4e8e\u751f\u4ea7\u8005\u751f\u4ea7\u7684\u6d88\u606f\u4f1a\u4e0d\u65ad\u8ffd\u52a0\u5230 log \u6587\u4ef6\u672b\u5c3e\uff0c\u4e3a\u9632\u6b62 log \u6587\u4ef6\u8fc7\u5927\u5bfc\u81f4\u6570\u636e\u5b9a\u4f4d\u6548\u7387\u4f4e\u4e0b\uff0cKafka \u91c7\u53d6\u4e86\u5206\u7247\u548c\u7d22\u5f15\u673a\u5236\uff0c\u5c06\u6bcf\u4e2a partition \u5206\u4e3a\u591a\u4e2a segment\uff0c\u6bcf\u4e2a segment \u5bf9\u5e94\u4e24\u4e2a\u6587\u4ef6\uff1a\u201c.index\u201d \u7d22\u5f15\u6587\u4ef6\u548c \u201c.log\u201d \u6570\u636e\u6587\u4ef6\u3002\u8fd9\u4e9b\u6587\u4ef6\u4f4d\u4e8e\u540c\u4e00\u6587\u4ef6\u4e0b\uff0c\u8be5\u6587\u4ef6\u5939\u7684\u547d\u540d\u89c4\u5219\u4e3a\uff1atopic \u540d-\u5206\u533a\u53f7\u3002\u4f8b\u5982\uff0cfirst \u8fd9\u4e2a topic \u6709\u4e09\u5206\u5206\u533a\uff0c\u5219\u5176\u5bf9\u5e94\u7684\u6587\u4ef6\u5939\u4e3a first-0\uff0cfirst-1\uff0cfirst-2\u3002index \u548c log \u6587\u4ef6\u4ee5\u5f53\u524d segment \u7684\u7b2c\u4e00\u6761\u6d88\u606f\u7684 offset \u547d\u540d\u3002\u4e0b\u56fe\u4e3a index \u6587\u4ef6 \u548c log \u6587\u4ef6\u7684\u7ed3\u6784\u793a\u610f\u56fe\u3002
        \n\"\"
        \n\u2003\u2003\u201c.index\u201d \u6587\u4ef6\u5b58\u50a8\u5927\u91cf\u7684\u7d22\u5f15\u4fe1\u606f\uff0c\u201c.log\u201d \u6587\u4ef6\u5b58\u50a8\u5927\u91cf\u7684\u6570\u636e\uff0c\u7d22\u5f15\u6587\u4ef6\u4e2d\u7684\u5143\u6570\u636e\u6307\u5411\u5bf9\u5e94\u6570\u636e\u6587\u4ef6\u4e2d message \u7684\u7269\u7406\u504f\u79fb\u91cf\u3002<\/p>\n

        \u751f\u4ea7\u8005<\/h4>\n

        \u5206\u533a\u7b56\u7565<\/h5>\n
        \u5206\u533a\u539f\u56e0<\/h6>\n
          \n
        • \u65b9\u4fbf\u5728\u96c6\u7fa4\u4e2d\u6269\u5c55\uff0c\u6bcf\u4e2a partition \u53ef\u4ee5\u901a\u8fc7\u8c03\u6574\u4ee5\u9002\u5e94\u5b83\u6240\u5728\u7684\u673a\u5668\uff0c\u800c\u4e00\u4e2a topic \u53c8\u53ef\u4ee5\u6709\u591a\u4e2a partition \u7ec4\u6210\uff0c\u56e0\u6b64\u53ef\u4ee5\u4ee5 partition \u4e3a\u5355\u4f4d\u8bfb\u5199\u4e86\u3002<\/li>\n
        • \u53ef\u4ee5\u63d0\u9ad8\u5e76\u53d1\uff0c\u56e0\u6b64\u53ef\u4ee5\u4ee5 partition \u4e3a\u5355\u4f4d\u8bfb\u5199\u4e86\u3002<\/li>\n<\/ul>\n
          \u5206\u533a\u539f\u5219<\/h6>\n

          \u2003\u2003\u6211\u4eec\u9700\u8981\u5c06 Producer \u53d1\u9001\u7684\u6570\u636e\u5c01\u88c5\u6210\u4e00\u4e2a ProducerRecord \u5bf9\u8c61\u3002\u8be5\u5bf9\u8c61\u9700\u8981\u6307\u5b9a\u4e00\u4e9b\u53c2\u6570\uff1a<\/p>\n

            \n
          • topic\uff1astring \u7c7b\u578b\uff0cNotNull<\/li>\n
          • partition\uff1aint \u7c7b\u578b\uff0c\u53ef\u9009<\/li>\n
          • timestamp\uff1along \u7c7b\u578b\uff0c\u53ef\u9009<\/li>\n
          • key\uff1astring\u7c7b\u578b\uff0c\u53ef\u9009<\/li>\n
          • value\uff1astring \u7c7b\u578b\uff0c\u53ef\u9009<\/li>\n
          • headers\uff1aarray \u7c7b\u578b\uff0cNullable<\/li>\n<\/ul>\n
              \n
            1. \u6307\u660e partition \u7684\u60c5\u51b5\u4e0b\uff0c\u76f4\u63a5\u5c06\u7ed9\u5b9a\u7684 value \u4f5c\u4e3a partition \u7684\u503c\u3002<\/li>\n
            2. \u6ca1\u6709\u6307\u660e partition \u4f46\u6709 key \u7684\u60c5\u51b5\u4e0b\uff0c\u5c06 key \u7684 hash \u503c\u4e0e\u5206\u533a\u6570\u53d6\u4f59\u5f97\u5230 partition \u503c\u3002<\/li>\n
            3. \u65e2\u6ca1\u6709 partition \u6709\u6ca1\u6709 key \u7684\u60c5\u51b5\u4e0b\uff0c\u7b2c\u4e00\u6b21\u8c03\u7528\u65f6\u968f\u673a\u751f\u6210\u4e00\u4e2a\u6574\u6570\uff08\u540e\u9762\u6bcf\u6b21\u8c03\u7528\u90fd\u5728\u8fd9\u4e2a\u6574\u6570\u4e0a\u81ea\u589e\uff09\uff0c\u5c06\u8fd9\u4e2a\u503c\u4e0e\u53ef\u7528\u7684\u5206\u533a\u6570\u53d6\u4f59\uff0c\u5f97\u5230 partition \u503c\uff0c\u4e5f\u5c31\u662f\u5e38\u8bf4\u7684 round-robin \u8f6e\u8be2\u7b97\u6cd5\u3002<\/li>\n<\/ol>\n
              \u6570\u636e\u53ef\u9760\u6027\u4fdd\u8bc1<\/h5>\n

              \u2003\u2003\u4e3a\u4fdd\u8bc1 producer \u53d1\u9001\u7684\u6570\u636e\uff0c\u80fd\u53ef\u9760\u5730\u53d1\u9001\u5230\u6307\u5b9a\u7684 topic\uff0ctopic \u7684\u6bcf\u4e2a partition \u6536\u5230 producer \u53d1\u9001\u7684\u6570\u636e\u540e\uff0c\u90fd\u9700\u8981\u5411 producer \u53d1\u9001 ack\uff08acknowledge \u786e\u8ba4\u6536\u5230\uff09\uff0c\u5982\u679c producer \u6536\u5230 ack\uff0c\u5c31\u4f1a\u8fdb\u884c\u4e0b\u4e00\u8f6e\u7684\u53d1\u9001\uff0c\u5426\u5219\u91cd\u65b0\u53d1\u9001\u6570\u636e\u3002
              \n\"\"<\/p>\n

              \u526f\u672c\u6570\u636e\u540c\u6b65\u7b56\u7565<\/h6>\n
                \n
              1. \u4f55\u65f6\u53d1\u9001 ack\uff1f\u786e\u4fdd\u6709 follower \u4e0e leader \u540c\u6b65\u5b8c\u6210\uff0cleader \u518d\u53d1\u9001 ack\uff0c\u8fd9\u6837\u624d\u80fd\u4fdd\u8bc1 leader \u6302\u6389\u4e4b\u540e\uff0c\u80fd\u5728 follower \u4e2d\u9009\u4e3e\u51fa\u65b0\u7684 leader \u800c\u4e0d\u4e22\u6570\u636e\u3002<\/li>\n
              2. \u591a\u5c11\u4e2a follower \u540c\u6b65\u5b8c\u6210\u540e\u53d1\u9001 ack\uff1f\u5168\u90e8 follower \u540c\u6b65\u5b8c\u6210\uff0c\u518d\u53d1\u9001 ack\u3002
                \n\"\"<\/li>\n<\/ol>\n
                ISR<\/h6>\n

                \u2003\u2003\u91c7\u7528\u7b2c\u4e8c\u79cd\u65b9\u6848\uff0c\u6240\u6709 follower \u5b8c\u6210\u540c\u6b65\uff0cproducer \u624d\u80fd\u7ee7\u7eed\u53d1\u9001\u6570\u636e\uff0c\u8bbe\u60f3\u6709\u4e00\u4e2a follower \u56e0\u4e3a\u67d0\u79cd\u539f\u56e0\u51fa\u73b0\u6545\u969c\uff0c\u90a3 leader \u5c31\u8981\u4e00\u76f4\u7b49\u5230\u5b83\u5b8c\u6210\u540c\u6b65\u3002\u8fd9\u4e2a\u95ee\u9898\u600e\u4e48\u89e3\u51b3\uff1fleader\u7ef4\u62a4\u4e86\u4e00\u4e2a\u52a8\u6001\u7684 in-sync replica set\uff08ISR\uff09\uff1a\u548c leader \u4fdd\u6301\u540c\u6b65\u7684 follower \u96c6\u5408\u3002\u5f53 ISR \u96c6\u5408\u4e2d\u7684 follower \u5b8c\u6210\u6570\u636e\u7684\u540c\u6b65\u4e4b\u540e\uff0cleader \u5c31\u4f1a\u7ed9 follower \u53d1\u9001 ack\u3002\u5982\u679c follower \u957f\u65f6\u95f4\u672a\u5411 leader \u540c\u6b65\u6570\u636e\uff0c\u5219\u8be5 follower \u5c06\u88ab\u8e22\u51fa ISR \u96c6\u5408\uff0c\u8be5\u65f6\u95f4\u9608\u503c\u7531 replica.lag.time.max.ms \u53c2\u6570\u8bbe\u5b9a\u3002leader \u53d1\u751f\u6545\u969c\u540e\uff0c\u5c31\u4f1a\u4ece ISR \u4e2d\u9009\u4e3e\u51fa\u65b0\u7684 leader\u3002<\/p>\n

                ack \u5e94\u7b54\u673a\u5236<\/h6>\n

                \u2003\u2003\u5bf9\u4e8e\u67d0\u4e9b\u4e0d\u592a\u91cd\u8981\u7684\u6570\u636e\uff0c\u5bf9\u6570\u636e\u7684\u53ef\u9760\u6027\u8981\u6c42\u4e0d\u662f\u5f88\u9ad8\uff0c\u80fd\u591f\u5bb9\u5fcd\u6570\u636e\u7684\u5c11\u91cf\u4e22\u5931\uff0c\u6240\u4ee5\u6ca1\u5fc5\u8981\u7b49 ISR \u4e2d\u7684 follower \u5168\u90e8\u63a5\u53d7\u6210\u529f\u3002\u6240\u4ee5 Kafka \u4e3a\u7528\u6237\u63d0\u4f9b\u4e86\u4e09\u79cd\u53ef\u9760\u6027\u7ea7\u522b\uff0c\u7528\u6237\u6839\u636e\u53ef\u9760\u6027\u548c\u5ef6\u8fdf\u7684\u8981\u6c42\u8fdb\u884c\u6743\u8861\uff0c\u9009\u62e9\u4ee5\u4e0b\u7684\u914d\u7f6e\u3002<\/p>\n

                  \n
                • 0\uff1aproducer \u4e0d\u7b49\u5f85 broker \u7684 ack\uff0c\u8fd9\u63d0\u4f9b\u4e86\u6700\u4f4e\u5ef6\u8fdf\uff0cbroker \u4e00\u6536\u5230\u6570\u636e\u8fd8\u6ca1\u6709\u5199\u5165\u78c1\u76d8\u5c31\u5df2\u7ecf\u8fd4\u56de\uff0c\u5f53 broker \u6545\u969c\u65f6\u6709\u53ef\u80fd\u4e22\u5931\u6570\u636e\u3002<\/li>\n
                • 1\uff1aproducer \u7b49\u5f85 broker \u7684 ack\uff0cpartition \u7684 leader \u843d\u76d8\u6210\u529f\u540e\u8fd4\u56de ack\uff0c\u5982\u679c\u5728 follower \u540c\u6b65\u6210\u529f\u4e4b\u524d leader \u6545\u969c\uff0c\u90a3\u4e48\u5c06\u4f1a\u4e22\u5931\u6570\u636e\u3002<\/li>\n
                • -1\uff08all\uff09\uff1aproducer \u7b49\u5f85 broker \u7684 ack\uff0cpartition \u7684 leader \u548c follower \u5168\u90e8\u843d\u76d8\u6210\u529f\u540e\u624d\u8fd4\u56de ack\u3002\u4f46\u662f\u5728 broker \u53d1\u9001 ack \u65f6\uff0cleader \u53d1\u751f\u6545\u969c\uff0c\u5219\u4f1a\u9020\u6210\u6570\u636e\u91cd\u590d\u3002
                  \n\"\"<\/li>\n<\/ul>\n
                  \u6545\u969c\u5904\u7406\u7ec6\u8282<\/h6>\n

                  \"\"
                  \n\u2003\u2003HW\uff0cHighWatermark\uff0c\u9ad8\u6c34\u4f4d\uff0c\u8868\u793a Consumer \u53ef\u4ee5\u6d88\u8d39\u5230\u7684\u6700\u9ad8 Partition \u504f\u79fb\u91cf\u3002HW \u4fdd\u8bc1\u4e86 Kafka \u96c6\u7fa4\u4e2d\u6d88\u606f\u7684\u4e00\u81f4\u6027\u3002\u786e\u5207\u5730\u8bf4\uff0c\u662f\u4fdd\u8bc1\u4e86 Partition \u7684 Follower \u4e0e Leader \u95f4\u6570 \u636e\u7684\u4e00\u81f4\u6027\u3002LEO\uff0cLog End Offset\uff0c\u65e5\u5fd7\u6700\u540e\u6d88\u606f\u7684\u504f\u79fb\u91cf\u3002\u6d88\u606f\u662f\u88ab\u5199\u5165\u5230 Kafka \u7684\u65e5\u5fd7\u6587\u4ef6\u4e2d\u7684\uff0c \u8fd9\u662f\u5f53\u524d\u6700\u540e\u4e00\u4e2a\u5199\u5165\u7684\u6d88\u606f\u5728 Partition \u4e2d\u7684\u504f\u79fb\u91cf\u3002\u5bf9\u4e8e Leader \u65b0\u5199\u5165\u7684\u6d88\u606f\uff0cConsumer \u662f\u4e0d\u80fd\u7acb\u523b\u6d88\u8d39\u7684\u3002Leader \u4f1a\u7b49\u5f85\u8be5\u6d88\u606f\u88ab\u6240\u6709 ISR \u4e2d\u7684 Partition Follower \u540c\u6b65\u540e\u624d\u4f1a\u66f4\u65b0 HW\uff0c\u6b64\u65f6\u6d88\u606f\u624d\u80fd\u88ab Consumer \u6d88\u8d39\u3002ISR \u961f\u5217\u4e2d\u6700\u5c0f\u7684 LEO\u3002
                  \n  Coordinator\uff1a\u4e00\u822c\u6307\u7684\u662f\u8fd0\u884c\u5728\u6bcf\u4e2a Broker \u4e0a\u7684 Group Coordinator \u8fdb\u7a0b\uff0c\u7528\u4e8e\u7ba1\u7406 Consumer Group \u4e2d\u7684\u5404\u4e2a\u6210\u5458\uff0c\u4e3b\u8981\u7528\u4e8e Offset \u4f4d\u79fb\u7ba1\u7406\u548c Rebalance\u3002\u4e00\u4e2a Coordinator \u53ef\u4ee5\u540c\u65f6\u7ba1\u7406\u591a\u4e2a\u6d88\u8d39\u8005\u7ec4\u3002Rebalance\uff1a\u5f53\u6d88\u8d39\u8005\u7ec4\u4e2d\u7684\u6570\u91cf\u53d1\u751f\u53d8\u5316\uff0c\u6216\u8005 Topic \u4e2d\u7684 Partition \u6570\u91cf\u53d1\u751f\u4e86\u53d8\u5316\u65f6\uff0cPartition \u7684\u6240\u6709\u6743\u4f1a\u5728\u6d88\u8d39\u8005\u95f4\u8f6c\u79fb\uff0c\u5373 Partition \u4f1a\u91cd\u65b0\u5206\u914d\uff0c\u8fd9\u4e2a\u8fc7\u7a0b\u79f0\u4e3a\u518d\u5747\u8861 Rebalance\u3002\u518d\u5747\u8861\u80fd\u591f\u7ed9\u6d88\u8d39\u8005\u7ec4\u53ca Broker \u5e26\u6765\u9ad8\u6027\u80fd\u3001\u9ad8\u53ef\u7528\u6027\u548c\u4f38\u7f29\uff0c\u4f46\u5728\u518d\u5747\u8861\u671f\u95f4\u6d88\u8d39\u8005\u662f\u65e0\u6cd5\u8bfb\u53d6\u6d88\u606f\u7684\uff0c\u5373\u6574\u4e2a Broker \u96c6\u7fa4\u6709\u5c0f\u4e00\u6bb5\u65f6\u95f4\u662f\u4e0d\u53ef\u7528\u7684\u3002\u56e0\u6b64\u8981\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u518d\u5747\u8861\u3002Offset Commit\uff1aConsumer \u4ece Broker \u4e2d\u53d6\u4e00\u6279\u6d88\u606f\u5199\u5165 Buffer \u8fdb\u884c\u6d88\u8d39\uff0c\u5728\u89c4\u5b9a\u7684\u65f6\u95f4\u5185\u6d88\u8d39\u5b8c\u6d88\u606f\u540e\uff0c\u4f1a\u81ea\u52a8\u5c06\u5176\u6d88\u8d39\u6d88\u606f\u7684 Offset \u63d0\u4ea4\u7ed9 Broker\uff0c\u4ee5\u8bb0\u5f55\u4e0b\u54ea\u4e9b\u6d88\u606f\u662f\u6d88\u8d39\u8fc7\u7684\u3002\u5f53\u7136\uff0c\u82e5\u5728\u65f6\u9650\u5185\u6ca1\u6709\u6d88\u8d39\u5b8c\u6bd5\uff0c\u5176\u662f\u4e0d\u4f1a\u63d0\u4ea4 Offset \u7684\u3002<\/p>\n

                    \n
                  1. Follower \u6545\u969c\uff1bfollower \u53d1\u751f\u6545\u969c\u540e\u4f1a\u88ab\u4e34\u65f6\u8e22\u51fa ISR \u96c6\u5408\uff0c\u5f85\u8be5 follower \u6062\u590d\u540e\uff0cfollower \u4f1a \u8bfb\u53d6\u672c\u5730\u78c1\u76d8\u8bb0\u5f55\u7684\u4e0a\u6b21\u7684 HW\uff0c\u5e76\u5c06 log \u6587\u4ef6\u9ad8\u4e8e HW \u7684\u90e8\u5206\u622a\u53d6\u6389\uff0c\u4ece HW \u5f00\u59cb\u5411 leader \u8fdb\u884c\u540c\u6b65\u6570\u636e\u64cd\u4f5c\u3002\u7b49\u8be5 follower \u7684 LEO \u5927\u4e8e\u7b49\u4e8e\u8be5 partition \u7684 HW\uff0c\u5373 follower \u8ffd\u4e0a leader \u540e\uff0c\u5c31\u53ef\u4ee5\u91cd\u65b0\u52a0\u5165 ISR \u4e86\u3002<\/li>\n
                  2. Leader \u6545\u969c\uff1bleader \u53d1\u751f\u6545\u969c\u540e\uff0c\u4f1a\u4ece ISR \u4e2d\u9009\u51fa\u4e00\u4e2a\u65b0\u7684 leader\uff0c\u4e4b\u540e\uff0c\u4e3a\u4fdd\u8bc1\u591a\u4e2a\u526f\u672c\u4e4b\u95f4\u7684\u6570\u636e\u4e00\u81f4\u6027\uff0c\u5176\u4f59\u7684 follower \u4f1a\u5148\u5c06\u5404\u81ea\u7684 log \u6587\u4ef6\u9ad8\u4e8e HW \u7684\u90e8\u5206\u622a\u6389\uff0c\u7136\u540e\u4ece\u65b0\u7684 leader \u540c\u6b65\u6570\u636e\u3002\u6ce8\u610f\uff1a\u8fd9\u53ea\u80fd\u4fdd\u8bc1\u526f\u672c\u4e4b\u95f4\u7684\u6570\u636e\u4e00\u81f4\u6027\uff0c\u5e76\u4e0d\u80fd\u4fdd\u8bc1\u6570\u636e\u4e0d\u4e22\u5931\u6216\u8005\u4e0d\u91cd\u590d\u3002<\/li>\n<\/ol>\n
                    Exactly Once \u8bed\u4e49<\/h5>\n

                    \u2003\u2003\u5c06\u670d\u52a1\u5668\u7684 ACK \u7ea7\u522b\u8bbe\u7f6e\u4e3a-1\uff0c\u53ef\u4ee5\u4fdd\u8bc1 producer \u5230 server \u4e4b\u95f4\u4e0d\u4f1a\u4e22\u5931\u6570\u636e\uff0c\u5373 At Least Once \u8bed\u4e49\u3002\u76f8\u5bf9\u7684\uff0c\u5c06\u670d\u52a1\u5668 ACK \u7ea7\u522b\u8bbe\u7f6e\u4e3a0\uff0c\u53ef\u4ee5\u4fdd\u8bc1\u751f\u4ea7\u8005\u6bcf\u6761\u6d88\u606f\u53ea\u4f1a\u88ab\u53d1\u9001\u4e00\u6b21\uff0c\u5373At Most Once \u8bed\u4e49\u3002At Least Once \u53ef\u4ee5\u4fdd\u8bc1\u6570\u636e\u4e0d\u4e22\u5931\uff0c\u4f46\u662f\u4e0d\u80fd\u4fdd\u8bc1\u6570\u636e\u4e0d\u91cd\u590d\uff1b\u76f8\u5bf9\u7684\uff0cAt Most Once \u53ef\u4ee5\u4fdd\u8bc1\u6570\u636e\u4e0d\u91cd\u590d\uff0c\u4f46\u662f\u4e0d\u80fd\u4fdd\u8bc1\u6570\u636e\u4e0d\u4e22\u5931\u3002\u4f46\u662f\uff0c\u5bf9\u4e8e\u4e00\u4e9b\u975e\u5e38\u91cd\u8981\u7684\u4fe1\u606f\uff0c\u6bd4\u5982\u4ea4\u6613\u6570\u636e\uff0c\u4e0b\u6e38\u6570\u636e\u6d88\u8d39\u8005\u8981\u6c42\u6570\u636e\u65e2\u4e0d\u91cd\u590d\u4e5f\u4e0d\u4e22\u5931\uff0c\u5373 Exactly Once \u8bed\u4e49\u30020.11\u7248\u672c\u7684 Kafka\uff0c\u5f15\u5165\u4e86\u5e42\u7b49\u6027\uff1aproducer \u4e0d\u8bba\u5411 server \u53d1\u9001\u591a\u5c11\u91cd\u590d\u6570\u636e\uff0cserver \u7aef\u90fd\u53ea\u4f1a\u6301\u4e45\u5316\u4e00\u6761\u3002\u5373\uff1a<\/p>\n

                    At Least Once + \u5e42\u7b49\u6027 = Exactly Once\n<\/code><\/pre>\n
                    \u2003\u2003\u8981\u542f\u7528\u5e42\u7b49\u6027\uff0c\u53ea\u9700\u8981\u5c06 producer \u7684\u53c2\u6570\u4e2d enable.idompotence \u8bbe\u7f6e\u4e3a true \u5373\u53ef\u3002 \u5982\u679c\u542f\u7528\u4e86\u5e42\u7b49\u6027\uff0c\u5219ack\u9ed8\u8ba4\u5c31\u662f-1\u3002\u5f00\u542f\u5e42\u7b49\u6027\u7684 producer \u5728\u521d\u59cb\u5316\u65f6\u4f1a\u88ab\u5206\u914d\u4e00\u4e2a PID\uff0c\u53d1\u5f80\u540c\u4e00 partition \u7684\u6d88\u606f\u4f1a\u9644\u5e26 Sequence Number\u3002\u800c borker \u7aef\u4f1a\u5bf9 <PID,Partition,SeqNumber> \u505a\u7f13\u5b58\uff0c\u5f53\u5177\u6709\u76f8\u540c\u4e3b\u952e\u7684\u6d88\u606f\u63d0\u4ea4\u65f6\uff0cbroker \u53ea\u4f1a\u6301\u4e45\u5316\u4e00\u6761\u3002\u4f46\u662f PID \u91cd\u542f\u540e\u5c31\u4f1a\u53d8\u5316\uff0c\u540c\u65f6\u4e0d\u540c\u7684 partition \u4e5f\u5177\u6709\u4e0d\u540c\u4e3b\u952e\uff0c\u6240\u4ee5\u5e42\u7b49\u6027\u65e0\u6cd5\u4fdd\u8bc1\u8de8\u5206\u533a\u4f1a\u8bdd\u7684 Exactly Once\u3002<\/p>\n
                    \u6d88\u8d39\u8005<\/h4>\n
                    \u6d88\u8d39\u65b9\u5f0f<\/h5>\n
                    \u2003\u2003consumer \u91c7\u7528 pull\uff08\u62c9\u53d6\uff09\u6a21\u5f0f\u4ece broker \u4e2d\u8bfb\u53d6\u6570\u636e\u3002consumer \u91c7\u7528 push\uff08\u63a8\u9001\uff09\u6a21\u5f0f\uff0cbroker \u7ed9 consumer \u63a8\u9001\u6d88\u606f\u7684\u901f\u7387\u662f\u7531 broker \u51b3\u5b9a\u7684\uff0c\u5f88\u96be\u9002\u5e94\u6d88\u8d39\u901f\u7387\u4e0d\u540c\u7684\u6d88\u8d39\u8005\u3002\u5b83\u7684\u76ee\u6807\u662f\u5c3d\u53ef\u80fd\u4ee5\u6700\u5feb\u901f\u5ea6\u4f20\u9012\u6d88\u606f\uff0c\u4f46\u662f\u8fd9\u6837\u5f88\u5bb9\u6613\u9020\u6210 consumer \u6765\u4e0d\u53ca\u5904\u7406\u6d88\u606f\uff0c\u5178\u578b\u7684\u8868\u73b0\u5c31\u662f\u62d2\u7edd\u670d\u52a1\u4ee5\u53ca\u7f51\u7edc\u62e5\u585e\u3002\u800c pull \u6a21\u5f0f\u5219\u53ef\u4ee5\u6839\u636e consumer \u7684\u6d88\u8d39\u80fd\u529b\u4ee5\u9002\u5f53\u7684\u901f\u7387\u6d88\u8d39\u6d88\u606f\u3002pull \u6a21\u5f0f\u4e0d\u8db3\u4e4b\u5904\u662f\uff0c\u5982\u679c Kafka \u6ca1\u6709\u6570\u636e\uff0c\u6d88\u8d39\u8005\u53ef\u80fd\u4f1a\u9677\u5165\u5faa\u73af\u4e2d\uff0c\u4e00\u76f4\u8fd4\u56de\u7a7a\u6570\u636e\u3002\u56e0\u4e3a\u6d88\u8d39\u8005\u4ece broker \u4e3b\u52a8\u62c9\u53d6\u6570\u636e\uff0c\u9700\u8981\u7ef4\u62a4\u4e00\u4e2a\u957f\u8f6e\u8be2\uff0c\u9488\u5bf9\u8fd9\u4e00\u70b9\uff0c Kafka \u7684\u6d88\u8d39\u8005\u5728\u6d88\u8d39\u6570\u636e\u65f6\u4f1a\u4f20\u5165\u4e00\u4e2a\u65f6\u957f\u53c2\u6570 timeout\uff0c\u5982\u679c\u5f53\u524d\u6ca1\u6709\u6570\u636e\u53ef\u4f9b\u6d88\u8d39\uff0cconsumer \u4f1a\u7b49\u5f85\u4e00\u6bb5\u65f6\u95f4\u4e4b\u540e\u518d\u8fd4\u56de\uff0c\u8fd9\u6bb5\u65f6\u957f\u5373\u4e3a timeout\u3002<\/p>\n
                    \u5206\u533a\u5206\u914d\u7b56\u7565<\/h5>\n
                    \u2003\u2003\u4e00\u4e2a consumer group \u4e2d\u6709\u591a\u4e2a consumer\uff0c\u4e00\u4e2a topic \u6709\u591a\u4e2a partition\uff0c\u6240\u4ee5\u5fc5\u7136\u4f1a\u6d89\u53ca\u5230 partition \u7684\u5206\u914d\u95ee\u9898\uff0c\u5373\u786e\u5b9a\u54ea\u4e2a partition \u7531\u54ea\u4e2a consumer \u6765\u6d88\u8d39\u3002Kafka \u6709\u4e24\u79cd\u5206\u914d\u7b56\u7565\uff0c\u4e00\u4e2a\u662f RoundRobin\uff0c\u4e00\u4e2a\u662f Range\uff0c\u9ed8\u8ba4\u4e3arange\uff0c\u5f53\u6d88\u8d39\u8005\u7ec4\u5185\u6d88\u8d39\u8005\u53d1\u751f\u53d8\u5316\u65f6\uff0c\u4f1a\u89e6\u53d1\u5206\u533a\u5206\u914d\u7b56\u7565\uff08\u65b9\u6cd5\u91cd\u65b0\u5206\u914d\uff09\u3002<\/p>\n
                    RoundRobin<\/h6>\n
                    \"\"
                    \n\u2003\u2003RoundRobin \u8f6e\u8be2\u65b9\u5f0f\u5c06\u5206\u533a\u6240\u6709\u4f5c\u4e3a\u4e00\u4e2a\u6574\u4f53\u8fdb\u884c hash \u6392\u5e8f\uff0c\u6d88\u8d39\u8005\u7ec4\u5185\u5206\u914d\u5206\u533a\u4e2a\u6570\u6700\u5927\u5dee\u522b\u4e3a1\uff0c\u662f\u6309\u7167\u7ec4\u6765\u5206\u7684\uff0c\u53ef\u4ee5\u89e3\u51b3\u591a\u4e2a\u6d88\u8d39\u8005\u6d88\u8d39\u6570\u636e\u4e0d\u5747\u8861\u7684\u95ee\u9898\u3002\u4f46\u662f\uff0c\u5f53\u6d88\u8d39\u8005\u7ec4\u5185\u8ba2\u9605\u4e0d\u540c\u4e3b\u9898\u65f6\uff0c\u53ef\u80fd\u9020\u6210\u6d88\u8d39\u6df7\u4e71\uff0c\u5982\u4e0b\u56fe\u6240\u793a\uff0cconsumer0 \u8ba2\u9605\u4e3b\u9898A\uff0cconsumer1 \u8ba2\u9605\u4e3b\u9898B\uff0c\u5c06 A\u3001B\u4e3b\u9898\u7684\u5206\u533a\u6392\u5e8f\u540e\u5206\u914d\u7ed9\u6d88\u8d39\u8005\u7ec4\uff0cTopicB \u5206\u533a\u4e2d\u7684\u6570\u636e\u53ef\u80fd\u5206\u914d\u5230 consumer0 \u4e2d\u3002
                    \n\"\"<\/p>\n
                    Range<\/h6>\n
                    \"\"
                    \n\u2003\u2003range \u65b9\u5f0f\u662f\u6309\u7167\u4e3b\u9898\u6765\u5206\u7684\uff0c\u4e0d\u4f1a\u4ea7\u751f\u8f6e\u8be2\u65b9\u5f0f\u7684\u6d88\u8d39\u6df7\u4e71\u95ee\u9898\u3002\u4f46\u662f\uff0c\u5982\u4e0b\u56fe\u6240\u793a\uff0cconsumer0\u3001consumer1 \u540c\u65f6\u8ba2\u9605\u4e86\u4e3b\u9898A\u548cB\uff0c\u53ef\u80fd\u9020\u6210\u6d88\u606f\u5206\u914d\u4e0d\u5bf9\u7b49\u95ee\u9898\uff0c\u5f53\u6d88\u8d39\u8005\u7ec4\u5185\u8ba2\u9605\u7684\u4e3b\u9898\u8d8a\u591a\uff0c\u5206\u533a\u5206\u914d\u53ef\u80fd\u8d8a\u4e0d\u5747\u8861\u3002
                    \n\"\"<\/p>\n
                    offset \u7684\u7ef4\u62a4<\/h5>\n
                    \u2003\u2003\u7531\u4e8e consumer \u5728\u6d88\u8d39\u8fc7\u7a0b\u4e2d\u53ef\u80fd\u4f1a\u51fa\u73b0\u65ad\u7535\u5b95\u673a\u7b49\u6545\u969c\uff0cconsumer \u6062\u590d\u540e\uff0c\u9700\u8981\u4ece\u6545\u969c\u524d\u7684\u4f4d\u7f6e\u7ee7\u7eed\u6d88\u8d39\uff0c\u6240\u4ee5 consumer \u9700\u8981\u5b9e\u65f6\u8bb0\u5f55\u81ea\u5df1\u6d88\u8d39\u5230\u4e86\u54ea\u4e2a offset\uff0c\u4ee5\u4fbf\u6545\u969c\u6062\u590d\u540e\u7ee7\u7eed\u6d88\u8d39\u3002Kafka 0.9 \u7248\u672c\u4e4b\u524d\uff0cconsumer \u9ed8\u8ba4\u5c06 offset \u4fdd\u5b58\u5728 Zookeeper \u4e2d\uff0c\u4ece 0.9 \u7248\u672c\u5f00\u59cb\uff0cconsumer \u9ed8\u8ba4\u5c06 offset \u4fdd\u5b58\u5728 Kafka \u4e00\u4e2a\u5185\u7f6e\u7684 topic \u4e2d\uff0c\u8be5 topic \u4e3a __consumer_offsets\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
                    \u539f\u5730\u5740\uff1a https:\/\/juejin.im\/post\/5e217c3fe51d450200787f23 \u2003\u2003 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-615","post","type-post","status-publish","format-standard","hentry","category-linux"],"_links":{"self":[{"href":"https:\/\/www.aiqinqin.info\/index.php?rest_route=\/wp\/v2\/posts\/615","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.aiqinqin.info\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.aiqinqin.info\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.aiqinqin.info\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.aiqinqin.info\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=615"}],"version-history":[{"count":7,"href":"https:\/\/www.aiqinqin.info\/index.php?rest_route=\/wp\/v2\/posts\/615\/revisions"}],"predecessor-version":[{"id":636,"href":"https:\/\/www.aiqinqin.info\/index.php?rest_route=\/wp\/v2\/posts\/615\/revisions\/636"}],"wp:attachment":[{"href":"https:\/\/www.aiqinqin.info\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=615"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.aiqinqin.info\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=615"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.aiqinqin.info\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=615"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}