{"id":1534,"date":"2020-06-08T17:23:25","date_gmt":"2020-06-08T09:23:25","guid":{"rendered":"http:\/\/39.97.231.10\/?p=1534"},"modified":"2020-06-08T17:23:25","modified_gmt":"2020-06-08T09:23:25","slug":"kafka%e9%ab%98%e5%8f%af%e7%94%a8%e5%ae%9e%e7%8e%b0%e5%8e%9f%e7%90%86","status":"publish","type":"post","link":"http:\/\/www.weijing.co\/?p=1534","title":{"rendered":"Kafka\u9ad8\u53ef\u7528\u5b9e\u73b0\u539f\u7406"},"content":{"rendered":"<p><strong>1 \u6982\u8ff0 \u00a0\u00a0<\/strong><br \/>\nKafka\u4e0e\u4f20\u7edf\u6d88\u606f\u7cfb\u7edf\u76f8\u6bd4\uff0c\u6709\u4ee5\u4e0b\u4e0d\u540c\uff1a<\/p>\n<ul class=\\\" list-paddingleft-2\\\">\n<li>\u5b83\u88ab\u8bbe\u8ba1\u4e3a\u4e00\u4e2a\u5206\u5e03\u5f0f\u7cfb\u7edf\uff0c\u6613\u4e8e\u5411\u5916\u6269\u5c55\uff1b<\/li>\n<li>\u5b83\u540c\u65f6\u4e3a\u53d1\u5e03\u548c\u8ba2\u9605\u63d0\u4f9b\u9ad8\u541e\u5410\u91cf\uff1b<\/li>\n<li>\u5b83\u652f\u6301\u591a\u8ba2\u9605\u8005\uff0c\u5f53\u5931\u8d25\u65f6\u80fd\u81ea\u52a8\u5e73\u8861\u6d88\u8d39\u8005\uff1b<\/li>\n<li>\u5b83\u5c06\u6d88\u606f\u6301\u4e45\u5316\u5230\u78c1\u76d8\uff0c\u56e0\u6b64\u53ef\u7528\u4e8e\u6279\u91cf\u6d88\u8d39\uff0c\u4f8b\u5982ETL\u4ee5\u53ca\u5b9e\u65f6\u5e94\u7528\u7a0b\u5e8f\u3002<\/li>\n<\/ul>\n<p>Kafka\u51ed\u501f\u7740\u81ea\u8eab\u7684\u4f18\u52bf\uff0c\u8d8a\u6765\u8d8a\u53d7\u5230\u4e92\u8054\u7f51\u4f01\u4e1a\u7684\u9752\u7750\uff0c\u552f\u54c1\u4f1a\u4e5f\u91c7\u7528Kafka\u4f5c\u4e3a\u5176\u5185\u90e8\u6838\u5fc3\u6d88\u606f\u5f15\u64ce\u4e4b\u4e00\u3002Kafka\u4f5c\u4e3a\u4e00\u4e2a\u5546\u4e1a\u7ea7\u6d88\u606f\u4e2d\u95f4\u4ef6\uff0c\u6d88\u606f\u53ef\u9760\u6027\u7684\u91cd\u8981\u6027\u53ef\u60f3\u800c\u77e5\u3002\u5982\u4f55\u786e\u4fdd\u6d88\u606f\u7684\u7cbe\u786e\u4f20\u8f93\uff1f\u5982\u4f55\u786e\u4fdd\u6d88\u606f\u7684\u51c6\u786e\u5b58\u50a8\uff1f\u5982\u4f55\u786e\u4fdd\u6d88\u606f\u7684\u6b63\u786e\u6d88\u8d39\uff1f\u8fd9\u4e9b\u90fd\u662f\u9700\u8981\u8003\u8651\u7684\u95ee\u9898\u3002\u672c\u6587\u9996\u5148\u4eceKafka\u7684\u67b6\u6784\u7740\u624b\uff0c\u5148\u4e86\u89e3\u4e0bKafka\u7684\u57fa\u672c\u539f\u7406\uff0c\u7136\u540e\u901a\u8fc7\u5bf9kakfa\u7684\u5b58\u50a8\u673a\u5236\u3001\u590d\u5236\u539f\u7406\u3001\u540c\u6b65\u539f\u7406\u3001\u53ef\u9760\u6027\u548c\u6301\u4e45\u6027\u4fdd\u8bc1\u7b49\u7b49\u4e00\u6b65\u6b65\u5bf9\u5176\u53ef\u9760\u6027\u8fdb\u884c\u5206\u6790\uff0c\u6700\u540e\u901a\u8fc7benchmark\u6765\u589e\u5f3a\u5bf9Kafka\u9ad8\u53ef\u9760\u6027\u7684\u8ba4\u77e5\u3002<\/p>\n<hr \/>\n<section>2 Kafka\u4f53\u7cfb\u67b6\u6784\u00a0\u00a0<\/section>\n<p><img class=\\\"\\\" src=\\\"https:\/\/notecdn.yiban.io\/cloud_res\/521685660\/imgs\/20-6-8_09:16:18.873_32854.jpeg\\\" width=\\\"100%\\\" \/><br \/>\n\u5982\u4e0a\u56fe\u6240\u793a\uff0c\u4e00\u4e2a\u5178\u578b\u7684Kafka\u4f53\u7cfb\u67b6\u6784\u5305\u62ec\u82e5\u5e72Producer\uff08\u53ef\u4ee5\u662f\u670d\u52a1\u5668\u65e5\u5fd7\uff0c\u4e1a\u52a1\u6570\u636e\uff0c\u9875\u9762\u524d\u7aef\u4ea7\u751f\u7684page view\u7b49\u7b49\uff09\uff0c\u82e5\u5e72broker\uff08Kafka\u652f\u6301\u6c34\u5e73\u6269\u5c55\uff0c\u4e00\u822cbroker\u6570\u91cf\u8d8a\u591a\uff0c\u96c6\u7fa4\u541e\u5410\u7387\u8d8a\u9ad8\uff09\uff0c\u82e5\u5e72Consumer (Group)\uff0c\u4ee5\u53ca\u4e00\u4e2aZookeeper\u96c6\u7fa4\u3002Kafka\u901a\u8fc7Zookeeper\u7ba1\u7406\u96c6\u7fa4\u914d\u7f6e\uff0c\u9009\u4e3eleader\uff0c\u4ee5\u53ca\u5728consumer group\u53d1\u751f\u53d8\u5316\u65f6\u8fdb\u884crebalance\u3002Producer\u4f7f\u7528push(\u63a8)\u6a21\u5f0f\u5c06\u6d88\u606f\u53d1\u5e03\u5230broker\uff0cConsumer\u4f7f\u7528pull(\u62c9)\u6a21\u5f0f\u4ecebroker\u8ba2\u9605\u5e76\u6d88\u8d39\u6d88\u606f\u3002<br \/>\n<strong>\u540d\u8bcd\u89e3\u91ca\uff1a<\/strong><\/p>\n<table width=\\\"668\\\">\n<thead>\n<tr class=\\\"firstRow\\\">\n<th align=\\\"center\\\" width=\\\"110\\\">\u540d\u79f0<\/th>\n<th align=\\\"center\\\" width=\\\"414\\\">\u89e3\u91ca<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td width=\\\"110\\\">Broker<\/td>\n<td width=\\\"414\\\">\u6d88\u606f\u4e2d\u95f4\u4ef6\u5904\u7406\u8282\u70b9\uff0c\u4e00\u4e2aKafka\u8282\u70b9\u5c31\u662f\u4e00\u4e2abroker\uff0c\u4e00\u4e2a\u6216\u8005\u591a\u4e2aBroker\u53ef\u4ee5\u7ec4\u6210\u4e00\u4e2aKafka\u96c6\u7fa4<\/td>\n<\/tr>\n<tr>\n<td width=\\\"110\\\">Topic<\/td>\n<td width=\\\"414\\\">Kafka\u6839\u636etopic\u5bf9\u6d88\u606f\u8fdb\u884c\u5f52\u7c7b\uff0c\u53d1\u5e03\u5230Kafka\u96c6\u7fa4\u7684\u6bcf\u6761\u6d88\u606f\u90fd\u9700\u8981\u6307\u5b9a\u4e00\u4e2atopic<\/td>\n<\/tr>\n<tr>\n<td width=\\\"110\\\">Producer<\/td>\n<td width=\\\"414\\\">\u6d88\u606f\u751f\u4ea7\u8005\uff0c\u5411Broker\u53d1\u9001\u6d88\u606f\u7684\u5ba2\u6237\u7aef<\/td>\n<\/tr>\n<tr>\n<td width=\\\"110\\\">Consumer<\/td>\n<td width=\\\"414\\\">\u6d88\u606f\u6d88\u8d39\u8005\uff0c\u4eceBroker\u8bfb\u53d6\u6d88\u606f\u7684\u5ba2\u6237\u7aef<\/td>\n<\/tr>\n<tr>\n<td width=\\\"110\\\">ConsumerGroup<\/td>\n<td width=\\\"414\\\">\u6bcf\u4e2aConsumer\u5c5e\u4e8e\u4e00\u4e2a\u7279\u5b9a\u7684Consumer Group\uff0c\u4e00\u6761\u6d88\u606f\u53ef\u4ee5\u53d1\u9001\u5230\u591a\u4e2a\u4e0d\u540c\u7684Consumer Group\uff0c\u4f46\u662f\u4e00\u4e2aConsumer Group\u4e2d\u53ea\u80fd\u6709\u4e00\u4e2aConsumer\u80fd\u591f\u6d88\u8d39\u8be5\u6d88\u606f<\/td>\n<\/tr>\n<tr>\n<td width=\\\"110\\\">Partition<\/td>\n<td width=\\\"414\\\">\u7269\u7406\u4e0a\u7684\u6982\u5ff5\uff0c\u4e00\u4e2atopic\u53ef\u4ee5\u5206\u4e3a\u591a\u4e2apartition\uff0c\u6bcf\u4e2apartition\u5185\u90e8\u662f\u6709\u5e8f\u7684<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<section>\n<section>2.1 Topic &amp; Partition<br \/>\n<\/section>\n<p>\u00a0\u4e00\u4e2atopic\u53ef\u4ee5\u8ba4\u4e3a\u4e00\u4e2a\u4e00\u7c7b\u6d88\u606f\uff0c\u6bcf\u4e2atopic\u5c06\u88ab\u5206\u6210\u591a\u4e2apartition\uff0c\u6bcf\u4e2apartition\u5728\u5b58\u50a8\u5c42\u9762\u662fappend log\u6587\u4ef6\u3002\u4efb\u4f55\u53d1\u5e03\u5230\u6b64partition\u7684\u6d88\u606f\u90fd\u4f1a\u88ab\u8ffd\u52a0\u5230log\u6587\u4ef6\u7684\u5c3e\u90e8\uff0c\u6bcf\u6761\u6d88\u606f\u5728\u6587\u4ef6\u4e2d\u7684\u4f4d\u7f6e\u79f0\u4e3aoffset(\u504f\u79fb\u91cf)\uff0coffset\u4e3a\u4e00\u4e2along\u578b\u7684\u6570\u5b57\uff0c\u5b83\u552f\u4e00\u6807\u8bb0\u4e00\u6761\u6d88\u606f\u3002\u6bcf\u6761\u6d88\u606f\u90fd\u88abappend\u5230partition\u4e2d\uff0c\u662f\u987a\u5e8f\u5199\u78c1\u76d8\uff0c\u56e0\u6b64\u6548\u7387\u975e\u5e38\u9ad8\uff08\u7ecf\u9a8c\u8bc1\uff0c\u987a\u5e8f\u5199\u78c1\u76d8\u6548\u7387\u6bd4\u968f\u673a\u5199\u5185\u5b58\u8fd8\u8981\u9ad8\uff0c\u8fd9\u662fKafka\u9ad8\u541e\u5410\u7387\u7684\u4e00\u4e2a\u5f88\u91cd\u8981\u7684\u4fdd\u8bc1\uff09\u3002<br \/>\n<\/section>\n<p><img class=\\\"\\\" src=\\\"https:\/\/notecdn.yiban.io\/cloud_res\/521685660\/imgs\/20-6-8_09:16:18.906_77672.png\\\" width=\\\"100%\\\" \/><br \/>\n\u6bcf\u4e00\u6761\u6d88\u606f\u88ab\u53d1\u9001\u5230broker\u4e2d\uff0c\u4f1a\u6839\u636epartition\u89c4\u5219\u9009\u62e9\u88ab\u5b58\u50a8\u5230\u54ea\u4e00\u4e2apartition\u3002\u5982\u679cpartition\u89c4\u5219\u8bbe\u7f6e\u7684\u5408\u7406\uff0c\u6240\u6709\u6d88\u606f\u53ef\u4ee5\u5747\u5300\u5206\u5e03\u5230\u4e0d\u540c\u7684partition\u91cc\uff0c\u8fd9\u6837\u5c31\u5b9e\u73b0\u4e86\u6c34\u5e73\u6269\u5c55\u3002\uff08\u5982\u679c\u4e00\u4e2atopic\u5bf9\u5e94\u4e00\u4e2a\u6587\u4ef6\uff0c\u90a3\u8fd9\u4e2a\u6587\u4ef6\u6240\u5728\u7684\u673a\u5668I\/O\u5c06\u4f1a\u6210\u4e3a\u8fd9\u4e2atopic\u7684\u6027\u80fd\u74f6\u9888\uff0c\u800cpartition\u89e3\u51b3\u4e86\u8fd9\u4e2a\u95ee\u9898\uff09\u3002\u5728\u521b\u5efatopic\u65f6\u53ef\u4ee5\u5728$KAFKA_HOME\/config\/server.properties\u4e2d\u6307\u5b9a\u8fd9\u4e2apartition\u7684\u6570\u91cf\uff08\u5982\u4e0b\u6240\u793a\uff09\uff0c\u5f53\u7136\u53ef\u4ee5\u5728topic\u521b\u5efa\u4e4b\u540e\u53bb\u4fee\u6539partition\u7684\u6570\u91cf\u3002<\/p>\n<pre># The default number of log partitions per topic. More partitions allow greater\n# parallelism for consumption, but this will also result in more files across\n# the brokers.\nnum.partitions=3<\/pre>\n<p>\u5728\u53d1\u9001\u4e00\u6761\u6d88\u606f\u65f6\uff0c\u53ef\u4ee5\u6307\u5b9a\u8fd9\u4e2a\u6d88\u606f\u7684key\uff0cproducer\u6839\u636e\u8fd9\u4e2akey\u548cpartition\u673a\u5236\u6765\u5224\u65ad\u8fd9\u4e2a\u6d88\u606f\u53d1\u9001\u5230\u54ea\u4e2apartition\u3002partition\u673a\u5236\u53ef\u4ee5\u901a\u8fc7\u6307\u5b9aproducer\u7684partition.class\u8fd9\u4e00\u53c2\u6570\u6765\u6307\u5b9a\uff0c\u8be5class\u5fc5\u987b\u5b9e\u73b0kafka.producer.Partitioner\u63a5\u53e3\u3002<br \/>\n\u6709\u5173Topic\u4e0ePartition\u7684\u66f4\u591a\u7ec6\u8282\uff0c\u53ef\u4ee5\u53c2\u8003\u4e0b\u9762\u7684\u201cKafka\u6587\u4ef6\u5b58\u50a8\u673a\u5236\u201d\u8fd9\u4e00\u8282\u3002<\/p>\n<section>3 \u9ad8\u53ef\u9760\u6027\u5b58\u50a8\u5206\u6790\u00a0 \u00a0<\/section>\n<p>Kafka\u7684\u9ad8\u53ef\u9760\u6027\u7684\u4fdd\u969c\u6765\u6e90\u4e8e\u5176\u5065\u58ee\u7684\u526f\u672c\uff08replication\uff09\u7b56\u7565\u3002\u901a\u8fc7\u8c03\u8282\u5176\u526f\u672c\u76f8\u5173\u53c2\u6570\uff0c\u53ef\u4ee5\u4f7f\u5f97Kafka\u5728\u6027\u80fd\u548c\u53ef\u9760\u6027\u4e4b\u95f4\u8fd0\u8f6c\u7684\u6e38\u5203\u6709\u4f59\u3002Kafka\u4ece0.8.x\u7248\u672c\u5f00\u59cb\u63d0\u4f9bpartition\u7ea7\u522b\u7684\u590d\u5236,replication\u7684\u6570\u91cf\u53ef\u4ee5\u5728$KAFKA_HOME\/config\/server.properties\u4e2d\u914d\u7f6e\uff08default.replication.refactor\uff09\u3002<br \/>\n\u8fd9\u91cc\u5148\u4eceKafka\u6587\u4ef6\u5b58\u50a8\u673a\u5236\u5165\u624b\uff0c\u4ece\u6700\u5e95\u5c42\u4e86\u89e3Kafka\u7684\u5b58\u50a8\u7ec6\u8282\uff0c\u8fdb\u800c\u5bf9\u5176\u7684\u5b58\u50a8\u6709\u4e2a\u5fae\u89c2\u7684\u8ba4\u77e5\u3002\u4e4b\u540e\u901a\u8fc7Kafka\u590d\u5236\u539f\u7406\u548c\u540c\u6b65\u65b9\u5f0f\u6765\u9610\u8ff0\u5b8f\u89c2\u5c42\u9762\u7684\u6982\u5ff5\u3002\u6700\u540e\u4eceISR\uff0cHW\uff0cleader\u9009\u4e3e\u4ee5\u53ca\u6570\u636e\u53ef\u9760\u6027\u548c\u6301\u4e45\u6027\u4fdd\u8bc1\u7b49\u7b49\u5404\u4e2a\u7ef4\u5ea6\u6765\u4e30\u5bcc\u5bf9Kafka\u76f8\u5173\u77e5\u8bc6\u70b9\u7684\u8ba4\u77e5\u3002<\/p>\n<section>3.1 Kafka\u6587\u4ef6\u5b58\u50a8\u673a\u5236\u00a0 \u00a0<\/section>\n<p>Kafka\u4e2d\u6d88\u606f\u662f\u4ee5topic\u8fdb\u884c\u5206\u7c7b\u7684\uff0c\u751f\u4ea7\u8005\u901a\u8fc7topic\u5411Kafka broker\u53d1\u9001\u6d88\u606f\uff0c\u6d88\u8d39\u8005\u901a\u8fc7topic\u8bfb\u53d6\u6570\u636e\u3002\u7136\u800ctopic\u5728\u7269\u7406\u5c42\u9762\u53c8\u80fd\u4ee5partition\u4e3a\u5206\u7ec4\uff0c\u4e00\u4e2atopic\u53ef\u4ee5\u5206\u6210\u82e5\u5e72\u4e2apartition\uff0c\u90a3\u4e48topic\u4ee5\u53capartition\u53c8\u662f\u600e\u4e48\u5b58\u50a8\u7684\u5462\uff1fpartition\u8fd8\u53ef\u4ee5\u7ec6\u5206\u4e3asegment\uff0c\u4e00\u4e2apartition\u7269\u7406\u4e0a\u7531\u591a\u4e2asegment\u7ec4\u6210\uff0c\u90a3\u4e48\u8fd9\u4e9bsegment\u53c8\u662f\u4ec0\u4e48\u5462\uff1f\u4e0b\u9762\u6211\u4eec\u6765\u4e00\u4e00\u63ed\u6653\u3002<br \/>\n\u4e3a\u4e86\u4fbf\u4e8e\u8bf4\u660e\u95ee\u9898\uff0c\u5047\u8bbe\u8fd9\u91cc\u53ea\u6709\u4e00\u4e2aKafka\u96c6\u7fa4\uff0c\u4e14\u8fd9\u4e2a\u96c6\u7fa4\u53ea\u6709\u4e00\u4e2aKafka broker\uff0c\u5373\u53ea\u6709\u4e00\u53f0\u7269\u7406\u673a\u3002\u5728\u8fd9\u4e2aKafka broker\u4e2d\u914d\u7f6e\uff08$KAFKA_HOME\/config\/server.properties\u4e2d\uff09log.dirs=\/tmp\/kafka-logs\uff0c\u4ee5\u6b64\u6765\u8bbe\u7f6eKafka\u6d88\u606f\u6587\u4ef6\u5b58\u50a8\u76ee\u5f55\uff0c\u4e0e\u6b64\u540c\u65f6\u521b\u5efa\u4e00\u4e2atopic\uff1atopic_vms_test\uff0cpartition\u7684\u6570\u91cf\u4e3a4\uff08$KAFKA_HOME\/bin\/kafka-topics.sh &#8211;create &#8211;zookeeper localhost:2181 &#8211;partitions 4 &#8211;topic topic_vms_test &#8211;replication-factor 4\uff09\u3002\u90a3\u4e48\u6211\u4eec\u6b64\u65f6\u53ef\u4ee5\u5728\/tmp\/kafka-logs\u76ee\u5f55\u4e2d\u53ef\u4ee5\u770b\u5230\u751f\u6210\u4e864\u4e2a\u76ee\u5f55\uff1a<\/p>\n<pre>drwxr-xr-x 2 root root 4096 Apr 10 16:10 topic_vms_test-0\ndrwxr-xr-x 2 root root 4096 Apr 10 16:10 topic_vms_test-1\ndrwxr-xr-x 2 root root 4096 Apr 10 16:10 topic_vms_test-2\ndrwxr-xr-x 2 root root 4096 Apr 10 16:10 topic_vms_test-3<\/pre>\n<p>\u5728Kafka\u6587\u4ef6\u5b58\u50a8\u4e2d\uff0c\u540c\u4e00\u4e2atopic\u4e0b\u6709\u591a\u4e2a\u4e0d\u540c\u7684partition\uff0c\u6bcf\u4e2apartiton\u4e3a\u4e00\u4e2a\u76ee\u5f55\uff0cpartition\u7684\u540d\u79f0\u89c4\u5219\u4e3a\uff1atopic\u540d\u79f0+\u6709\u5e8f\u5e8f\u53f7\uff0c\u7b2c\u4e00\u4e2a\u5e8f\u53f7\u4ece0\u5f00\u59cb\u8ba1\uff0c\u6700\u5927\u7684\u5e8f\u53f7\u4e3apartition\u6570\u91cf\u51cf1\uff0cpartition\u662f\u5b9e\u9645\u7269\u7406\u4e0a\u7684\u6982\u5ff5\uff0c\u800ctopic\u662f\u903b\u8f91\u4e0a\u7684\u6982\u5ff5\u3002<br \/>\n\u4e0a\u9762\u63d0\u5230partition\u8fd8\u53ef\u4ee5\u7ec6\u5206\u4e3asegment\uff0c\u8fd9\u4e2asegment\u53c8\u662f\u4ec0\u4e48\uff1f\u5982\u679c\u5c31\u4ee5partition\u4e3a\u6700\u5c0f\u5b58\u50a8\u5355\u4f4d\uff0c\u6211\u4eec\u53ef\u4ee5\u60f3\u8c61\u5f53Kafka producer\u4e0d\u65ad\u53d1\u9001\u6d88\u606f\uff0c\u5fc5\u7136\u4f1a\u5f15\u8d77partition\u6587\u4ef6\u7684\u65e0\u9650\u6269\u5f20\uff0c\u8fd9\u6837\u5bf9\u4e8e\u6d88\u606f\u6587\u4ef6\u7684\u7ef4\u62a4\u4ee5\u53ca\u5df2\u7ecf\u88ab\u6d88\u8d39\u7684\u6d88\u606f\u7684\u6e05\u7406\u5e26\u6765\u4e25\u91cd\u7684\u5f71\u54cd\uff0c\u6240\u4ee5\u8fd9\u91cc\u4ee5segment\u4e3a\u5355\u4f4d\u53c8\u5c06partition\u7ec6\u5206\u3002\u6bcf\u4e2apartition(\u76ee\u5f55)\u76f8\u5f53\u4e8e\u4e00\u4e2a\u5de8\u578b\u6587\u4ef6\u88ab\u5e73\u5747\u5206\u914d\u5230\u591a\u4e2a\u5927\u5c0f\u76f8\u7b49\u7684segment(\u6bb5)\u6570\u636e\u6587\u4ef6\u4e2d\uff08\u6bcf\u4e2asegment \u6587\u4ef6\u4e2d\u6d88\u606f\u6570\u91cf\u4e0d\u4e00\u5b9a\u76f8\u7b49\uff09\u8fd9\u79cd\u7279\u6027\u4e5f\u65b9\u4fbfold segment\u7684\u5220\u9664\uff0c\u5373\u65b9\u4fbf\u5df2\u88ab\u6d88\u8d39\u7684\u6d88\u606f\u7684\u6e05\u7406\uff0c\u63d0\u9ad8\u78c1\u76d8\u7684\u5229\u7528\u7387\u3002\u6bcf\u4e2apartition\u53ea\u9700\u8981\u652f\u6301\u987a\u5e8f\u8bfb\u5199\u5c31\u884c\uff0csegment\u7684\u6587\u4ef6\u751f\u547d\u5468\u671f\u7531\u670d\u52a1\u7aef\u914d\u7f6e\u53c2\u6570\uff08log.segment.bytes\uff0clog.roll.{ms,hours}\u7b49\u82e5\u5e72\u53c2\u6570\uff09\u51b3\u5b9a\u3002<br \/>\nsegment\u6587\u4ef6\u7531\u4e24\u90e8\u5206\u7ec4\u6210\uff0c\u5206\u522b\u4e3a\u201c.index\u201d\u6587\u4ef6\u548c\u201c.log\u201d\u6587\u4ef6\uff0c\u5206\u522b\u8868\u793a\u4e3asegment\u7d22\u5f15\u6587\u4ef6\u548c\u6570\u636e\u6587\u4ef6\u3002\u8fd9\u4e24\u4e2a\u6587\u4ef6\u7684\u547d\u4ee4\u89c4\u5219\u4e3a\uff1apartition\u5168\u5c40\u7684\u7b2c\u4e00\u4e2asegment\u4ece0\u5f00\u59cb\uff0c\u540e\u7eed\u6bcf\u4e2asegment\u6587\u4ef6\u540d\u4e3a\u4e0a\u4e00\u4e2asegment\u6587\u4ef6\u6700\u540e\u4e00\u6761\u6d88\u606f\u7684offset\u503c\uff0c\u6570\u503c\u5927\u5c0f\u4e3a64\u4f4d\uff0c20\u4f4d\u6570\u5b57\u5b57\u7b26\u957f\u5ea6\uff0c\u6ca1\u6709\u6570\u5b57\u75280\u586b\u5145\uff0c\u5982\u4e0b\uff1a<\/p>\n<pre>00000000000000000000.index\n00000000000000000000.log\n00000000000000170410.index\n00000000000000170410.log\n00000000000000239430.index\n00000000000000239430.log<\/pre>\n<p>\u4ee5\u4e0a\u9762\u7684segment\u6587\u4ef6\u4e3a\u4f8b\uff0c\u5c55\u793a\u51fasegment\uff1a00000000000000170410\u7684\u201c.index\u201d\u6587\u4ef6\u548c\u201c.log\u201d\u6587\u4ef6\u7684\u5bf9\u5e94\u7684\u5173\u7cfb\uff0c\u5982\u4e0b\u56fe\uff1a<br \/>\n<img class=\\\"\\\" src=\\\"https:\/\/notecdn.yiban.io\/cloud_res\/521685660\/imgs\/20-6-8_09:16:18.896_55428.png\\\" width=\\\"100%\\\" \/><br \/>\n\u5982\u4e0a\u56fe\uff0c\u201c.index\u201d\u7d22\u5f15\u6587\u4ef6\u5b58\u50a8\u5927\u91cf\u7684\u5143\u6570\u636e\uff0c\u201c.log\u201d\u6570\u636e\u6587\u4ef6\u5b58\u50a8\u5927\u91cf\u7684\u6d88\u606f\uff0c\u7d22\u5f15\u6587\u4ef6\u4e2d\u7684\u5143\u6570\u636e\u6307\u5411\u5bf9\u5e94\u6570\u636e\u6587\u4ef6\u4e2dmessage\u7684\u7269\u7406\u504f\u79fb\u5730\u5740\u3002\u5176\u4e2d\u4ee5\u201c.index\u201d\u7d22\u5f15\u6587\u4ef6\u4e2d\u7684\u5143\u6570\u636e[3, 348]\u4e3a\u4f8b\uff0c\u5728\u201c.log\u201d\u6570\u636e\u6587\u4ef6\u8868\u793a\u7b2c3\u4e2a\u6d88\u606f\uff0c\u5373\u5728\u5168\u5c40partition\u4e2d\u8868\u793a170410+3=170413\u4e2a\u6d88\u606f\uff0c\u8be5\u6d88\u606f\u7684\u7269\u7406\u504f\u79fb\u5730\u5740\u4e3a348\u3002<br \/>\n\u90a3\u4e48\u5982\u4f55\u4ecepartition\u4e2d\u901a\u8fc7offset\u67e5\u627emessage\u5462\uff1f\u4ee5\u4e0a\u56fe\u4e3a\u4f8b\uff0c\u8bfb\u53d6offset=170418\u7684\u6d88\u606f\uff0c\u9996\u5148\u67e5\u627esegment\u6587\u4ef6\uff0c\u5176\u4e2d00000000000000000000.index\u4e3a\u6700\u5f00\u59cb\u7684\u6587\u4ef6\uff0c\u7b2c\u4e8c\u4e2a\u6587\u4ef6\u4e3a00000000000000170410.index\uff08\u8d77\u59cb\u504f\u79fb\u4e3a170410+1=170411\uff09\uff0c\u800c\u7b2c\u4e09\u4e2a\u6587\u4ef6\u4e3a00000000000000239430.index\uff08\u8d77\u59cb\u504f\u79fb\u4e3a239430+1=239431\uff09\uff0c\u6240\u4ee5\u8fd9\u4e2aoffset=170418\u5c31\u843d\u5230\u4e86\u7b2c\u4e8c\u4e2a\u6587\u4ef6\u4e4b\u4e2d\u3002\u5176\u4ed6\u540e\u7eed\u6587\u4ef6\u53ef\u4ee5\u4f9d\u6b21\u7c7b\u63a8\uff0c\u4ee5\u5176\u5b9e\u504f\u79fb\u91cf\u547d\u540d\u5e76\u6392\u5217\u8fd9\u4e9b\u6587\u4ef6\uff0c\u7136\u540e\u6839\u636e\u4e8c\u5206\u67e5\u627e\u6cd5\u5c31\u53ef\u4ee5\u5feb\u901f\u5b9a\u4f4d\u5230\u5177\u4f53\u6587\u4ef6\u4f4d\u7f6e\u3002\u5176\u6b21\u6839\u636e00000000000000170410.index\u6587\u4ef6\u4e2d\u7684[8,1325]\u5b9a\u4f4d\u523000000000000000170410.log\u6587\u4ef6\u4e2d\u76841325\u7684\u4f4d\u7f6e\u8fdb\u884c\u8bfb\u53d6\u3002<\/p>\n<blockquote><p>\u8981\u662f\u8bfb\u53d6offset=170418\u7684\u6d88\u606f\uff0c\u4ece00000000000000170410.log\u6587\u4ef6\u4e2d\u76841325\u7684\u4f4d\u7f6e\u8fdb\u884c\u8bfb\u53d6\uff0c\u90a3\u4e48\u600e\u4e48\u77e5\u9053\u4f55\u65f6\u8bfb\u5b8c\u672c\u6761\u6d88\u606f\uff0c\u5426\u5219\u5c31\u8bfb\u5230\u4e0b\u4e00\u6761\u6d88\u606f\u7684\u5185\u5bb9\u4e86\uff1f\u8fd9\u4e2a\u5c31\u9700\u8981\u8054\u7cfb\u5230\u6d88\u606f\u7684\u7269\u7406\u7ed3\u6784\u4e86\uff0c\u6d88\u606f\u90fd\u5177\u6709\u56fa\u5b9a\u7684\u7269\u7406\u7ed3\u6784\uff0c\u5305\u62ec\uff1aoffset\uff088 Bytes\uff09\u3001\u6d88\u606f\u4f53\u7684\u5927\u5c0f\uff084 Bytes\uff09\u3001crc32\uff084 Bytes\uff09\u3001magic\uff081 Byte\uff09\u3001attributes\uff081 Byte\uff09\u3001key length\uff084 Bytes\uff09\u3001key\uff08K Bytes\uff09\u3001payload(N Bytes)\u7b49\u7b49\u5b57\u6bb5\uff0c\u53ef\u4ee5\u786e\u5b9a\u4e00\u6761\u6d88\u606f\u7684\u5927\u5c0f\uff0c\u5373\u8bfb\u53d6\u5230\u54ea\u91cc\u622a\u6b62\u3002<\/p><\/blockquote>\n<section>3.2 \u590d\u5236\u539f\u7406\u548c\u540c\u6b65\u65b9\u5f0f\u00a0 \u00a0<\/section>\n<p>Kafka\u4e2dtopic\u7684\u6bcf\u4e2apartition\u6709\u4e00\u4e2a\u9884\u5199\u5f0f\u7684\u65e5\u5fd7\u6587\u4ef6\uff0c\u867d\u7136partition\u53ef\u4ee5\u7ee7\u7eed\u7ec6\u5206\u4e3a\u82e5\u5e72\u4e2asegment\u6587\u4ef6\uff0c\u4f46\u662f\u5bf9\u4e8e\u4e0a\u5c42\u5e94\u7528\u6765\u8bf4\u53ef\u4ee5\u5c06partition\u770b\u6210\u6700\u5c0f\u7684\u5b58\u50a8\u5355\u5143\uff08\u4e00\u4e2a\u6709\u591a\u4e2asegment\u6587\u4ef6\u62fc\u63a5\u7684\u201c\u5de8\u578b\u201d\u6587\u4ef6\uff09\uff0c\u6bcf\u4e2apartition\u90fd\u7531\u4e00\u4e9b\u5217\u6709\u5e8f\u7684\u3001\u4e0d\u53ef\u53d8\u7684\u6d88\u606f\u7ec4\u6210\uff0c\u8fd9\u4e9b\u6d88\u606f\u88ab\u8fde\u7eed\u7684\u8ffd\u52a0\u5230partition\u4e2d\u3002<br \/>\n<img class=\\\"\\\" src=\\\"https:\/\/notecdn.yiban.io\/cloud_res\/521685660\/imgs\/20-6-8_09:16:18.838_916.png\\\" width=\\\"100%\\\" \/><br \/>\n\u4e0a\u56fe\u4e2d\u6709\u4e24\u4e2a\u65b0\u540d\u8bcd\uff1aHW\u548cLEO\u3002\u8fd9\u91cc\u5148\u4ecb\u7ecd\u4e0bLEO\uff0cLogEndOffset\u7684\u7f29\u5199\uff0c\u8868\u793a\u6bcf\u4e2apartition\u7684log\u6700\u540e\u4e00\u6761Message\u7684\u4f4d\u7f6e\u3002HW\u662fHighWatermark\u7684\u7f29\u5199\uff0c\u662f\u6307consumer\u80fd\u591f\u770b\u5230\u7684\u6b64partition\u7684\u4f4d\u7f6e\uff0c\u8fd9\u4e2a\u6d89\u53ca\u5230\u591a\u526f\u672c\u7684\u6982\u5ff5\uff0c\u8fd9\u91cc\u5148\u63d0\u53ca\u4e00\u4e0b\uff0c\u4e0b\u8282\u518d\u8be6\u8868\u3002<br \/>\n\u8a00\u5f52\u6b63\u4f20\uff0c\u4e3a\u4e86\u63d0\u9ad8\u6d88\u606f\u7684\u53ef\u9760\u6027\uff0cKafka\u6bcf\u4e2atopic\u7684partition\u6709N\u4e2a\u526f\u672c\uff08replicas\uff09\uff0c\u5176\u4e2dN(\u5927\u4e8e\u7b49\u4e8e1)\u662ftopic\u7684\u590d\u5236\u56e0\u5b50\uff08replica fator\uff09\u7684\u4e2a\u6570\u3002Kafka\u901a\u8fc7\u591a\u526f\u672c\u673a\u5236\u5b9e\u73b0\u6545\u969c\u81ea\u52a8\u8f6c\u79fb\uff0c\u5f53Kafka\u96c6\u7fa4\u4e2d\u4e00\u4e2abroker\u5931\u6548\u60c5\u51b5\u4e0b\u4ecd\u7136\u4fdd\u8bc1\u670d\u52a1\u53ef\u7528\u3002\u5728Kafka\u4e2d\u53d1\u751f\u590d\u5236\u65f6\u786e\u4fddpartition\u7684\u65e5\u5fd7\u80fd\u6709\u5e8f\u5730\u5199\u5230\u5176\u4ed6\u8282\u70b9\u4e0a\uff0cN\u4e2areplicas\u4e2d\uff0c\u5176\u4e2d\u4e00\u4e2areplica\u4e3aleader\uff0c\u5176\u4ed6\u90fd\u4e3afollower, leader\u5904\u7406partition\u7684\u6240\u6709\u8bfb\u5199\u8bf7\u6c42\uff0c\u4e0e\u6b64\u540c\u65f6\uff0cfollower\u4f1a\u88ab\u52a8\u5b9a\u671f\u5730\u53bb\u590d\u5236leader\u4e0a\u7684\u6570\u636e\u3002<br \/>\n\u5982\u4e0b\u56fe\u6240\u793a\uff0cKafka\u96c6\u7fa4\u4e2d\u67094\u4e2abroker, \u67d0topic\u67093\u4e2apartition,\u4e14\u590d\u5236\u56e0\u5b50\u5373\u526f\u672c\u4e2a\u6570\u4e5f\u4e3a3\uff1a<br \/>\n<img class=\\\"\\\" src=\\\"https:\/\/notecdn.yiban.io\/cloud_res\/521685660\/imgs\/20-6-8_09:16:18.863_53505.jpeg\\\" width=\\\"100%\\\" \/><br \/>\nKafka\u63d0\u4f9b\u4e86\u6570\u636e\u590d\u5236\u7b97\u6cd5\u4fdd\u8bc1\uff0c\u5982\u679cleader\u53d1\u751f\u6545\u969c\u6216\u6302\u6389\uff0c\u4e00\u4e2a\u65b0leader\u88ab\u9009\u4e3e\u5e76\u88ab\u63a5\u53d7\u5ba2\u6237\u7aef\u7684\u6d88\u606f\u6210\u529f\u5199\u5165\u3002Kafka\u786e\u4fdd\u4ece\u540c\u6b65\u526f\u672c\u5217\u8868\u4e2d\u9009\u4e3e\u4e00\u4e2a\u526f\u672c\u4e3aleader\uff0c\u6216\u8005\u8bf4follower\u8ffd\u8d76leader\u6570\u636e\u3002leader\u8d1f\u8d23\u7ef4\u62a4\u548c\u8ddf\u8e2aISR(In-Sync Replicas\u7684\u7f29\u5199\uff0c\u8868\u793a\u526f\u672c\u540c\u6b65\u961f\u5217\uff0c\u5177\u4f53\u53ef\u53c2\u8003\u4e0b\u8282)\u4e2d\u6240\u6709follower\u6ede\u540e\u7684\u72b6\u6001\u3002\u5f53producer\u53d1\u9001\u4e00\u6761\u6d88\u606f\u5230broker\u540e\uff0cleader\u5199\u5165\u6d88\u606f\u5e76\u590d\u5236\u5230\u6240\u6709follower\u3002\u6d88\u606f\u63d0\u4ea4\u4e4b\u540e\u624d\u88ab\u6210\u529f\u590d\u5236\u5230\u6240\u6709\u7684\u540c\u6b65\u526f\u672c\u3002\u6d88\u606f\u590d\u5236\u5ef6\u8fdf\u53d7\u6700\u6162\u7684follower\u9650\u5236\uff0c\u91cd\u8981\u7684\u662f\u5feb\u901f\u68c0\u6d4b\u6162\u526f\u672c\uff0c\u5982\u679cfollower\u201c\u843d\u540e\u201d\u592a\u591a\u6216\u8005\u5931\u6548\uff0cleader\u5c06\u4f1a\u628a\u5b83\u4eceISR\u4e2d\u5220\u9664\u3002<\/p>\n<section>3.3 ISR\u00a0 \u00a0<\/section>\n<p>\u4e0a\u8282\u6211\u4eec\u6d89\u53ca\u5230ISR (In-Sync Replicas)\uff0c\u8fd9\u4e2a\u662f\u6307\u526f\u672c\u540c\u6b65\u961f\u5217\u3002\u526f\u672c\u6570\u5bf9Kafka\u7684\u541e\u5410\u7387\u662f\u6709\u4e00\u5b9a\u7684\u5f71\u54cd\uff0c\u4f46\u6781\u5927\u7684\u589e\u5f3a\u4e86\u53ef\u7528\u6027\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0bKafka\u7684replica\u6570\u91cf\u4e3a1\uff0c\u5373\u6bcf\u4e2apartition\u90fd\u6709\u4e00\u4e2a\u552f\u4e00\u7684leader\uff0c\u4e3a\u4e86\u786e\u4fdd\u6d88\u606f\u7684\u53ef\u9760\u6027\uff0c\u901a\u5e38\u5e94\u7528\u4e2d\u5c06\u5176\u503c(\u7531broker\u7684\u53c2\u6570offsets.topic.replication.factor\u6307\u5b9a)\u5927\u5c0f\u8bbe\u7f6e\u4e3a\u5927\u4e8e1\uff0c\u6bd4\u59823\u3002 \u6240\u6709\u7684\u526f\u672c\uff08replicas\uff09\u7edf\u79f0\u4e3aAssigned Replicas\uff0c\u5373AR\u3002<br \/>\nISR\u662fAR\u4e2d\u7684\u4e00\u4e2a\u5b50\u96c6\uff0c\u7531leader\u7ef4\u62a4ISR\u5217\u8868\uff0cfollower\u4eceleader\u540c\u6b65\u6570\u636e\u6709\u4e00\u4e9b\u5ef6\u8fdf\uff08\u5305\u62ec\u5ef6\u8fdf\u65f6\u95f4replica.lag.time.max.ms\u548c\u5ef6\u8fdf\u6761\u6570replica.lag.max.messages\u4e24\u4e2a\u7ef4\u5ea6, \u5f53\u524d\u6700\u65b0\u7684\u7248\u672c0.10.x\u4e2d\u53ea\u652f\u6301replica.lag.time.max.ms\u8fd9\u4e2a\u7ef4\u5ea6\uff09\uff0c\u4efb\u610f\u4e00\u4e2a\u8d85\u8fc7\u9608\u503c\u90fd\u4f1a\u628afollower\u5254\u9664\u51faISR, \u5b58\u5165OSR\uff08Outof-Sync Replicas\uff09\u5217\u8868\uff0c\u65b0\u52a0\u5165\u7684follower\u4e5f\u4f1a\u5148\u5b58\u653e\u5728OSR\u4e2d\u3002AR=ISR+OSR\u3002<br \/>\nKafka 0.10.x\u7248\u672c\u540e\u79fb\u9664\u4e86replica.lag.max.messages\u53c2\u6570\uff0c\u53ea\u4fdd\u7559\u4e86replica.lag.time.max.ms\u4f5c\u4e3aISR\u4e2d\u526f\u672c\u7ba1\u7406\u7684\u53c2\u6570\u3002\u4e3a\u4ec0\u4e48\u8fd9\u6837\u505a\u5462\uff1freplica.lag.max.messages\u8868\u793a\u5f53\u524d\u67d0\u4e2a\u526f\u672c\u843d\u540eleaeder\u7684\u6d88\u606f\u6570\u91cf\u8d85\u8fc7\u4e86\u8fd9\u4e2a\u53c2\u6570\u7684\u503c\uff0c\u90a3\u4e48leader\u5c31\u4f1a\u628afollower\u4eceISR\u4e2d\u5220\u9664\u3002\u5047\u8bbe\u8bbe\u7f6ereplica.lag.max.messages=4\uff0c\u90a3\u4e48\u5982\u679cproducer\u4e00\u6b21\u4f20\u9001\u81f3broker\u7684\u6d88\u606f\u6570\u91cf\u90fd\u5c0f\u4e8e4\u6761\u65f6\uff0c\u56e0\u4e3a\u5728leader\u63a5\u53d7\u5230producer\u53d1\u9001\u7684\u6d88\u606f\u4e4b\u540e\u800cfollower\u526f\u672c\u5f00\u59cb\u62c9\u53d6\u8fd9\u4e9b\u6d88\u606f\u4e4b\u524d\uff0cfollower\u843d\u540eleader\u7684\u6d88\u606f\u6570\u4e0d\u4f1a\u8d85\u8fc74\u6761\u6d88\u606f\uff0c\u6545\u6b64\u6ca1\u6709follower\u79fb\u51faISR\uff0c\u6240\u4ee5\u8fd9\u65f6\u5019replica.lag.max.message\u7684\u8bbe\u7f6e\u4f3c\u4e4e\u662f\u5408\u7406\u7684\u3002<br \/>\n\u4f46\u662fproducer\u53d1\u8d77\u77ac\u65f6\u9ad8\u5cf0\u6d41\u91cf\uff0cproducer\u4e00\u6b21\u53d1\u9001\u7684\u6d88\u606f\u8d85\u8fc74\u6761\u65f6\uff0c\u4e5f\u5c31\u662f\u8d85\u8fc7replica.lag.max.messages\uff0c\u6b64\u65f6follower\u90fd\u4f1a\u88ab\u8ba4\u4e3a\u662f\u4e0eleader\u526f\u672c\u4e0d\u540c\u6b65\u4e86\uff0c\u4ece\u800c\u88ab\u8e22\u51fa\u4e86ISR\u3002\u4f46\u5b9e\u9645\u4e0a\u8fd9\u4e9bfollower\u90fd\u662f\u5b58\u6d3b\u72b6\u6001\u7684\u4e14\u6ca1\u6709\u6027\u80fd\u95ee\u9898\u3002\u90a3\u4e48\u5728\u4e4b\u540e\u8ffd\u4e0aleader,\u5e76\u88ab\u91cd\u65b0\u52a0\u5165\u4e86ISR\u3002\u4e8e\u662f\u5c31\u4f1a\u51fa\u73b0\u5b83\u4eec\u4e0d\u65ad\u5730\u5254\u51faISR\u7136\u540e\u91cd\u65b0\u56de\u5f52ISR\uff0c\u8fd9\u65e0\u7591\u589e\u52a0\u4e86\u65e0\u8c13\u7684\u6027\u80fd\u635f\u8017\u3002\u800c\u4e14\u8fd9\u4e2a\u53c2\u6570\u662fbroker\u5168\u5c40\u7684\u3002\u8bbe\u7f6e\u592a\u5927\u4e86\uff0c\u5f71\u54cd\u771f\u6b63\u201c\u843d\u540e\u201dfollower\u7684\u79fb\u9664\uff1b\u8bbe\u7f6e\u7684\u592a\u5c0f\u4e86\uff0c\u5bfc\u81f4follower\u7684\u9891\u7e41\u8fdb\u51fa\u3002\u65e0\u6cd5\u7ed9\u5b9a\u4e00\u4e2a\u5408\u9002\u7684replica.lag.max.messages\u7684\u503c\uff0c\u6545\u6b64\uff0c\u65b0\u7248\u672c\u7684Kafka\u79fb\u9664\u4e86\u8fd9\u4e2a\u53c2\u6570\u3002<\/p>\n<blockquote><p>\u6ce8\uff1aISR\u4e2d\u5305\u62ec\uff1aleader\u548cfollower\u3002<\/p><\/blockquote>\n<p>\u4e0a\u9762\u4e00\u8282\u8fd8\u6d89\u53ca\u5230\u4e00\u4e2a\u6982\u5ff5\uff0c\u5373HW\u3002HW\u4fd7\u79f0\u9ad8\u6c34\u4f4d\uff0cHighWatermark\u7684\u7f29\u5199\uff0c\u53d6\u4e00\u4e2apartition\u5bf9\u5e94\u7684ISR\u4e2d\u6700\u5c0f\u7684LEO\u4f5c\u4e3aHW\uff0cconsumer\u6700\u591a\u53ea\u80fd\u6d88\u8d39\u5230HW\u6240\u5728\u7684\u4f4d\u7f6e\u3002\u53e6\u5916\u6bcf\u4e2areplica\u90fd\u6709HW,leader\u548cfollower\u5404\u81ea\u8d1f\u8d23\u66f4\u65b0\u81ea\u5df1\u7684HW\u7684\u72b6\u6001\u3002\u5bf9\u4e8eleader\u65b0\u5199\u5165\u7684\u6d88\u606f\uff0cconsumer\u4e0d\u80fd\u7acb\u523b\u6d88\u8d39\uff0cleader\u4f1a\u7b49\u5f85\u8be5\u6d88\u606f\u88ab\u6240\u6709ISR\u4e2d\u7684replicas\u540c\u6b65\u540e\u66f4\u65b0HW\uff0c\u6b64\u65f6\u6d88\u606f\u624d\u80fd\u88abconsumer\u6d88\u8d39\u3002\u8fd9\u6837\u5c31\u4fdd\u8bc1\u4e86\u5982\u679cleader\u6240\u5728\u7684broker\u5931\u6548\uff0c\u8be5\u6d88\u606f\u4ecd\u7136\u53ef\u4ee5\u4ece\u65b0\u9009\u4e3e\u7684leader\u4e2d\u83b7\u53d6\u3002\u5bf9\u4e8e\u6765\u81ea\u5185\u90e8broKer\u7684\u8bfb\u53d6\u8bf7\u6c42\uff0c\u6ca1\u6709HW\u7684\u9650\u5236\u3002<br \/>\n\u4e0b\u56fe\u8be6\u7ec6\u7684\u8bf4\u660e\u4e86\u5f53producer\u751f\u4ea7\u6d88\u606f\u81f3broker\u540e\uff0cISR\u4ee5\u53caHW\u548cLEO\u7684\u6d41\u8f6c\u8fc7\u7a0b\uff1a<br \/>\n<img class=\\\"\\\" src=\\\"https:\/\/notecdn.yiban.io\/cloud_res\/521685660\/imgs\/20-6-8_09:16:18.894_2171.jpeg\\\" width=\\\"100%\\\" \/><br \/>\n\u7531\u6b64\u53ef\u89c1\uff0cKafka\u7684\u590d\u5236\u673a\u5236\u65e2\u4e0d\u662f\u5b8c\u5168\u7684\u540c\u6b65\u590d\u5236\uff0c\u4e5f\u4e0d\u662f\u5355\u7eaf\u7684\u5f02\u6b65\u590d\u5236\u3002\u4e8b\u5b9e\u4e0a\uff0c\u540c\u6b65\u590d\u5236\u8981\u6c42\u6240\u6709\u80fd\u5de5\u4f5c\u7684follower\u90fd\u590d\u5236\u5b8c\uff0c\u8fd9\u6761\u6d88\u606f\u624d\u4f1a\u88abcommit\uff0c\u8fd9\u79cd\u590d\u5236\u65b9\u5f0f\u6781\u5927\u7684\u5f71\u54cd\u4e86\u541e\u5410\u7387\u3002\u800c\u5f02\u6b65\u590d\u5236\u65b9\u5f0f\u4e0b\uff0cfollower\u5f02\u6b65\u7684\u4eceleader\u590d\u5236\u6570\u636e\uff0c\u6570\u636e\u53ea\u8981\u88ableader\u5199\u5165log\u5c31\u88ab\u8ba4\u4e3a\u5df2\u7ecfcommit\uff0c\u8fd9\u79cd\u60c5\u51b5\u4e0b\u5982\u679cfollower\u90fd\u8fd8\u6ca1\u6709\u590d\u5236\u5b8c\uff0c\u843d\u540e\u4e8eleader\u65f6\uff0c\u7a81\u7136leader\u5b95\u673a\uff0c\u5219\u4f1a\u4e22\u5931\u6570\u636e\u3002\u800cKafka\u7684\u8fd9\u79cd\u4f7f\u7528ISR\u7684\u65b9\u5f0f\u5219\u5f88\u597d\u7684\u5747\u8861\u4e86\u786e\u4fdd\u6570\u636e\u4e0d\u4e22\u5931\u4ee5\u53ca\u541e\u5410\u7387\u3002<br \/>\nKafka\u7684ISR\u7684\u7ba1\u7406\u6700\u7ec8\u90fd\u4f1a\u53cd\u9988\u5230Zookeeper\u8282\u70b9\u4e0a\u3002\u5177\u4f53\u4f4d\u7f6e\u4e3a\uff1a\/brokers\/topics\/[topic]\/partitions\/[partition]\/state\u3002\u76ee\u524d\u6709\u4e24\u4e2a\u5730\u65b9\u4f1a\u5bf9\u8fd9\u4e2aZookeeper\u7684\u8282\u70b9\u8fdb\u884c\u7ef4\u62a4\uff1a<\/p>\n<ol class=\\\" list-paddingleft-2\\\">\n<li>Controller\u6765\u7ef4\u62a4\uff1aKafka\u96c6\u7fa4\u4e2d\u7684\u5176\u4e2d\u4e00\u4e2aBroker\u4f1a\u88ab\u9009\u4e3e\u4e3aController\uff0c\u4e3b\u8981\u8d1f\u8d23Partition\u7ba1\u7406\u548c\u526f\u672c\u72b6\u6001\u7ba1\u7406\uff0c\u4e5f\u4f1a\u6267\u884c\u7c7b\u4f3c\u4e8e\u91cd\u5206\u914dpartition\u4e4b\u7c7b\u7684\u7ba1\u7406\u4efb\u52a1\u3002\u5728\u7b26\u5408\u67d0\u4e9b\u7279\u5b9a\u6761\u4ef6\u4e0b\uff0cController\u4e0b\u7684LeaderSelector\u4f1a\u9009\u4e3e\u65b0\u7684leader\uff0cISR\u548c\u65b0\u7684leader_epoch\u53cacontroller_epoch\u5199\u5165Zookeeper\u7684\u76f8\u5173\u8282\u70b9\u4e2d\u3002\u540c\u65f6\u53d1\u8d77LeaderAndIsrRequest\u901a\u77e5\u6240\u6709\u7684replicas\u3002<\/li>\n<li>leader\u6765\u7ef4\u62a4\uff1aleader\u6709\u5355\u72ec\u7684\u7ebf\u7a0b\u5b9a\u671f\u68c0\u6d4bISR\u4e2dfollower\u662f\u5426\u8131\u79bbISR, \u5982\u679c\u53d1\u73b0ISR\u53d8\u5316\uff0c\u5219\u4f1a\u5c06\u65b0\u7684ISR\u7684\u4fe1\u606f\u8fd4\u56de\u5230Zookeeper\u7684\u76f8\u5173\u8282\u70b9\u4e2d\u3002<\/li>\n<\/ol>\n<section>3.4 \u6570\u636e\u53ef\u9760\u6027\u548c\u6301\u4e45\u6027\u4fdd\u8bc1\u00a0 \u00a0<\/section>\n<p>\u5f53producer\u5411leader\u53d1\u9001\u6570\u636e\u65f6\uff0c\u53ef\u4ee5\u901a\u8fc7request.required.acks\u53c2\u6570\u6765\u8bbe\u7f6e\u6570\u636e\u53ef\u9760\u6027\u7684\u7ea7\u522b\uff1a<\/p>\n<ul class=\\\" list-paddingleft-2\\\">\n<li>1\uff08\u9ed8\u8ba4\uff09\uff1a\u8fd9\u610f\u5473\u7740producer\u5728ISR\u4e2d\u7684leader\u5df2\u6210\u529f\u6536\u5230\u7684\u6570\u636e\u5e76\u5f97\u5230\u786e\u8ba4\u540e\u53d1\u9001\u4e0b\u4e00\u6761message\u3002\u5982\u679cleader\u5b95\u673a\u4e86\uff0c\u5219\u4f1a\u4e22\u5931\u6570\u636e\u3002<\/li>\n<li>0\uff1a\u8fd9\u610f\u5473\u7740producer\u65e0\u9700\u7b49\u5f85\u6765\u81eabroker\u7684\u786e\u8ba4\u800c\u7ee7\u7eed\u53d1\u9001\u4e0b\u4e00\u6279\u6d88\u606f\u3002\u8fd9\u79cd\u60c5\u51b5\u4e0b\u6570\u636e\u4f20\u8f93\u6548\u7387\u6700\u9ad8\uff0c\u4f46\u662f\u6570\u636e\u53ef\u9760\u6027\u786e\u662f\u6700\u4f4e\u7684\u3002<\/li>\n<li>-1\uff1aproducer\u9700\u8981\u7b49\u5f85ISR\u4e2d\u7684\u6240\u6709follower\u90fd\u786e\u8ba4\u63a5\u6536\u5230\u6570\u636e\u540e\u624d\u7b97\u4e00\u6b21\u53d1\u9001\u5b8c\u6210\uff0c\u53ef\u9760\u6027\u6700\u9ad8\u3002\u4f46\u662f\u8fd9\u6837\u4e5f\u4e0d\u80fd\u4fdd\u8bc1\u6570\u636e\u4e0d\u4e22\u5931\uff0c\u6bd4\u5982\u5f53ISR\u4e2d\u53ea\u6709leader\u65f6\uff08\u524d\u9762ISR\u90a3\u4e00\u8282\u8bb2\u5230\uff0cISR\u4e2d\u7684\u6210\u5458\u7531\u4e8e\u67d0\u4e9b\u60c5\u51b5\u4f1a\u589e\u52a0\u4e5f\u4f1a\u51cf\u5c11\uff0c\u6700\u5c11\u5c31\u53ea\u5269\u4e00\u4e2aleader\uff09\uff0c\u8fd9\u6837\u5c31\u53d8\u6210\u4e86acks=1\u7684\u60c5\u51b5\u3002<\/li>\n<\/ul>\n<p>\u5982\u679c\u8981\u63d0\u9ad8\u6570\u636e\u7684\u53ef\u9760\u6027\uff0c\u5728\u8bbe\u7f6erequest.required.acks=-1\u7684\u540c\u65f6\uff0c\u4e5f\u8981min.insync.replicas\u8fd9\u4e2a\u53c2\u6570(\u53ef\u4ee5\u5728broker\u6216\u8005topic\u5c42\u9762\u8fdb\u884c\u8bbe\u7f6e)\u7684\u914d\u5408\uff0c\u8fd9\u6837\u624d\u80fd\u53d1\u6325\u6700\u5927\u7684\u529f\u6548\u3002min.insync.replicas\u8fd9\u4e2a\u53c2\u6570\u8bbe\u5b9aISR\u4e2d\u7684\u6700\u5c0f\u526f\u672c\u6570\u662f\u591a\u5c11\uff0c\u9ed8\u8ba4\u503c\u4e3a1\uff0c\u5f53\u4e14\u4ec5\u5f53request.required.acks\u53c2\u6570\u8bbe\u7f6e\u4e3a-1\u65f6\uff0c\u6b64\u53c2\u6570\u624d\u751f\u6548\u3002\u5982\u679cISR\u4e2d\u7684\u526f\u672c\u6570\u5c11\u4e8emin.insync.replicas\u914d\u7f6e\u7684\u6570\u91cf\u65f6\uff0c\u5ba2\u6237\u7aef\u4f1a\u8fd4\u56de\u5f02\u5e38\uff1aorg.apache.kafka.common.errors.NotEnoughReplicasExceptoin: Messages are rejected since there are fewer in-sync replicas than required\u3002<br \/>\n\u63a5\u4e0b\u6765\u5bf9acks=1\u548c-1\u7684\u4e24\u79cd\u60c5\u51b5\u8fdb\u884c\u8be6\u7ec6\u5206\u6790\uff1a<br \/>\n<strong>1. request.required.acks=1<\/strong><br \/>\nproducer\u53d1\u9001\u6570\u636e\u5230leader\uff0cleader\u5199\u672c\u5730\u65e5\u5fd7\u6210\u529f\uff0c\u8fd4\u56de\u5ba2\u6237\u7aef\u6210\u529f\uff1b\u6b64\u65f6ISR\u4e2d\u7684\u526f\u672c\u8fd8\u6ca1\u6709\u6765\u5f97\u53ca\u62c9\u53d6\u8be5\u6d88\u606f\uff0cleader\u5c31\u5b95\u673a\u4e86\uff0c\u90a3\u4e48\u6b64\u6b21\u53d1\u9001\u7684\u6d88\u606f\u5c31\u4f1a\u4e22\u5931\u3002<br \/>\n<strong>2. request.required.acks=-1<\/strong><br \/>\n\u540c\u6b65\uff08Kafka\u9ed8\u8ba4\u4e3a\u540c\u6b65\uff0c\u5373producer.type=sync\uff09\u7684\u53d1\u9001\u6a21\u5f0f\uff0creplication.factor&gt;=2\u4e14min.insync.replicas&gt;=2\u7684\u60c5\u51b5\u4e0b\uff0c\u4e0d\u4f1a\u4e22\u5931\u6570\u636e\u3002<br \/>\n\u6709\u4e24\u79cd\u5178\u578b\u60c5\u51b5\u3002acks=-1\u7684\u60c5\u51b5\u4e0b\uff08\u5982\u65e0\u7279\u6b8a\u8bf4\u660e\uff0c\u4ee5\u4e0backs\u90fd\u8868\u793a\u4e3a\u53c2\u6570request.required.acks\uff09\uff0c\u6570\u636e\u53d1\u9001\u5230leader, ISR\u7684follower\u5168\u90e8\u5b8c\u6210\u6570\u636e\u540c\u6b65\u540e\uff0cleader\u6b64\u65f6\u6302\u6389\uff0c\u90a3\u4e48\u4f1a\u9009\u4e3e\u51fa\u65b0\u7684leader\uff0c\u6570\u636e\u4e0d\u4f1a\u4e22\u5931\u3002<br \/>\nacks=-1\u7684\u60c5\u51b5\u4e0b\uff0c\u6570\u636e\u53d1\u9001\u5230leader\u540e \uff0c\u90e8\u5206ISR\u7684\u526f\u672c\u540c\u6b65\uff0cleader\u6b64\u65f6\u6302\u6389\u3002\u6bd4\u5982follower1h\u548cfollower2\u90fd\u6709\u53ef\u80fd\u53d8\u6210\u65b0\u7684leader, producer\u7aef\u4f1a\u5f97\u5230\u8fd4\u56de\u5f02\u5e38\uff0cproducer\u7aef\u4f1a\u91cd\u65b0\u53d1\u9001\u6570\u636e\uff0c\u6570\u636e\u53ef\u80fd\u4f1a\u91cd\u590d\u3002<br \/>\n\u5f53\u7136\u4e0a\u56fe\u4e2d\u5982\u679c\u5728leader crash\u7684\u65f6\u5019\uff0cfollower2\u8fd8\u6ca1\u6709\u540c\u6b65\u5230\u4efb\u4f55\u6570\u636e\uff0c\u800c\u4e14follower2\u88ab\u9009\u4e3e\u4e3a\u65b0\u7684leader\u7684\u8bdd\uff0c\u8fd9\u6837\u6d88\u606f\u5c31\u4e0d\u4f1a\u91cd\u590d\u3002<\/p>\n<blockquote><p>\u6ce8\uff1aKafka\u53ea\u5904\u7406fail\/recover\u95ee\u9898,\u4e0d\u5904\u7406Byzantine\u95ee\u9898\u3002<\/p><\/blockquote>\n<section>3.5 \u5173\u4e8eHW\u7684\u8fdb\u4e00\u6b65\u63a2\u8ba8\u00a0 \u00a0<\/section>\n<p>\u8003\u8651\u4e0a\u56fe\uff08\u5373acks=-1,\u90e8\u5206ISR\u526f\u672c\u540c\u6b65\uff09\u4e2d\u7684\u53e6\u4e00\u79cd\u60c5\u51b5\uff0c\u5982\u679c\u5728Leader\u6302\u6389\u7684\u65f6\u5019\uff0cfollower1\u540c\u6b65\u4e86\u6d88\u606f4,5\uff0cfollower2\u540c\u6b65\u4e86\u6d88\u606f4\uff0c\u4e0e\u6b64\u540c\u65f6follower2\u88ab\u9009\u4e3e\u4e3aleader\uff0c\u90a3\u4e48\u6b64\u65f6follower1\u4e2d\u7684\u591a\u51fa\u7684\u6d88\u606f5\u8be5\u505a\u5982\u4f55\u5904\u7406\u5462\uff1f<br \/>\n\u8fd9\u91cc\u5c31\u9700\u8981HW\u7684\u534f\u540c\u914d\u5408\u4e86\u3002\u5982\u524d\u6240\u8ff0\uff0c\u4e00\u4e2apartition\u4e2d\u7684ISR\u5217\u8868\u4e2d\uff0cleader\u7684HW\u662f\u6240\u6709ISR\u5217\u8868\u91cc\u526f\u672c\u4e2d\u6700\u5c0f\u7684\u90a3\u4e2a\u7684LEO\u3002\u7c7b\u4f3c\u4e8e\u6728\u6876\u539f\u7406\uff0c\u6c34\u4f4d\u53d6\u51b3\u4e8e\u6700\u4f4e\u90a3\u5757\u77ed\u677f\u3002<br \/>\n\u5982\u4e0a\u56fe\uff0c\u67d0\u4e2atopic\u7684\u67d0partition\u6709\u4e09\u4e2a\u526f\u672c\uff0c\u5206\u522b\u4e3aA\u3001B\u3001C\u3002A\u4f5c\u4e3aleader\u80af\u5b9a\u662fLEO\u6700\u9ad8\uff0cB\u7d27\u968f\u5176\u540e\uff0cC\u673a\u5668\u7531\u4e8e\u914d\u7f6e\u6bd4\u8f83\u4f4e\uff0c\u7f51\u7edc\u6bd4\u8f83\u5dee\uff0c\u6545\u800c\u540c\u6b65\u6700\u6162\u3002\u8fd9\u4e2a\u65f6\u5019A\u673a\u5668\u5b95\u673a\uff0c\u8fd9\u65f6\u5019\u5982\u679cB\u6210\u4e3aleader\uff0c\u5047\u5982\u6ca1\u6709HW\uff0c\u5728A\u91cd\u65b0\u6062\u590d\u4e4b\u540e\u4f1a\u505a\u540c\u6b65(makeFollower)\u64cd\u4f5c\uff0c\u5728\u5b95\u673a\u65f6log\u6587\u4ef6\u4e4b\u540e\u76f4\u63a5\u505a\u8ffd\u52a0\u64cd\u4f5c\uff0c\u800c\u5047\u5982B\u7684LEO\u5df2\u7ecf\u8fbe\u5230\u4e86A\u7684LEO\uff0c\u4f1a\u4ea7\u751f\u6570\u636e\u4e0d\u4e00\u81f4\u7684\u60c5\u51b5\uff0c\u6240\u4ee5\u4f7f\u7528HW\u6765\u907f\u514d\u8fd9\u79cd\u60c5\u51b5\u3002A\u5728\u505a\u540c\u6b65\u64cd\u4f5c\u7684\u65f6\u5019\uff0c\u5148\u5c06log\u6587\u4ef6\u622a\u65ad\u5230\u4e4b\u524d\u81ea\u5df1\u7684HW\u7684\u4f4d\u7f6e\uff0c\u53733\uff0c\u4e4b\u540e\u518d\u4eceB\u4e2d\u62c9\u53d6\u6d88\u606f\u8fdb\u884c\u540c\u6b65\u3002<br \/>\n\u5982\u679c\u5931\u8d25\u7684follower\u6062\u590d\u8fc7\u6765\uff0c\u5b83\u9996\u5148\u5c06\u81ea\u5df1\u7684log\u6587\u4ef6\u622a\u65ad\u5230\u4e0a\u6b21checkpointed\u65f6\u523b\u7684HW\u7684\u4f4d\u7f6e\uff0c\u4e4b\u540e\u518d\u4eceleader\u4e2d\u540c\u6b65\u6d88\u606f\u3002leader\u6302\u6389\u4f1a\u91cd\u65b0\u9009\u4e3e\uff0c\u65b0\u7684leader\u4f1a\u53d1\u9001\u201c\u6307\u4ee4\u201d\u8ba9\u5176\u4f59\u7684follower\u622a\u65ad\u81f3\u81ea\u8eab\u7684HW\u7684\u4f4d\u7f6e\u7136\u540e\u518d\u62c9\u53d6\u65b0\u7684\u6d88\u606f\u3002<\/p>\n<blockquote><p>\u5f53ISR\u4e2d\u7684\u4e2a\u526f\u672c\u7684LEO\u4e0d\u4e00\u81f4\u65f6\uff0c\u5982\u679c\u6b64\u65f6leader\u6302\u6389\uff0c\u9009\u4e3e\u65b0\u7684leader\u65f6\u5e76\u4e0d\u662f\u6309\u7167LEO\u7684\u9ad8\u4f4e\u8fdb\u884c\u9009\u4e3e\uff0c\u800c\u662f\u6309\u7167ISR\u4e2d\u7684\u987a\u5e8f\u9009\u4e3e\u3002<\/p><\/blockquote>\n<section>3.6 Leader\u9009\u4e3e\u00a0 \u00a0<\/section>\n<p>\u4e00\u6761\u6d88\u606f\u53ea\u6709\u88abISR\u4e2d\u7684\u6240\u6709follower\u90fd\u4eceleader\u590d\u5236\u8fc7\u53bb\u624d\u4f1a\u88ab\u8ba4\u4e3a\u5df2\u63d0\u4ea4\u3002\u8fd9\u6837\u5c31\u907f\u514d\u4e86\u90e8\u5206\u6570\u636e\u88ab\u5199\u8fdb\u4e86leader\uff0c\u8fd8\u6ca1\u6765\u5f97\u53ca\u88ab\u4efb\u4f55follower\u590d\u5236\u5c31\u5b95\u673a\u4e86\uff0c\u800c\u9020\u6210\u6570\u636e\u4e22\u5931\u3002\u800c\u5bf9\u4e8eproducer\u800c\u8a00\uff0c\u5b83\u53ef\u4ee5\u9009\u62e9\u662f\u5426\u7b49\u5f85\u6d88\u606fcommit\uff0c\u8fd9\u53ef\u4ee5\u901a\u8fc7request.required.acks\u6765\u8bbe\u7f6e\u3002\u8fd9\u79cd\u673a\u5236\u786e\u4fdd\u4e86\u53ea\u8981ISR\u4e2d\u6709\u4e00\u4e2a\u6216\u8005\u4ee5\u4e0a\u7684follower\uff0c\u4e00\u6761\u88abcommit\u7684\u6d88\u606f\u5c31\u4e0d\u4f1a\u4e22\u5931\u3002<br \/>\n\u6709\u4e00\u4e2a\u5f88\u91cd\u8981\u7684\u95ee\u9898\u662f\u5f53leader\u5b95\u673a\u4e86\uff0c\u600e\u6837\u5728follower\u4e2d\u9009\u4e3e\u51fa\u65b0\u7684leader\uff0c\u56e0\u4e3afollower\u53ef\u80fd\u843d\u540e\u5f88\u591a\u6216\u8005\u76f4\u63a5crash\u4e86\uff0c\u6240\u4ee5\u5fc5\u987b\u786e\u4fdd\u9009\u62e9\u201c\u6700\u65b0\u201d\u7684follower\u4f5c\u4e3a\u65b0\u7684leader\u3002\u4e00\u4e2a\u57fa\u672c\u7684\u539f\u5219\u5c31\u662f\uff0c\u5982\u679cleader\u4e0d\u5728\u4e86\uff0c\u65b0\u7684leader\u5fc5\u987b\u62e5\u6709\u539f\u6765\u7684leader commit\u7684\u6240\u6709\u6d88\u606f\u3002\u8fd9\u5c31\u9700\u8981\u505a\u4e00\u4e2a\u6298\u4e2d\uff0c\u5982\u679cleader\u5728\u8868\u540d\u4e00\u4e2a\u6d88\u606f\u88abcommit\u524d\u7b49\u5f85\u66f4\u591a\u7684follower\u786e\u8ba4\uff0c\u90a3\u4e48\u5728\u5b83\u6302\u6389\u4e4b\u540e\u5c31\u6709\u66f4\u591a\u7684follower\u53ef\u4ee5\u6210\u4e3a\u65b0\u7684leader\uff0c\u4f46\u8fd9\u4e5f\u4f1a\u9020\u6210\u541e\u5410\u7387\u7684\u4e0b\u964d\u3002<br \/>\n\u4e00\u79cd\u975e\u5e38\u5e38\u7528\u7684\u9009\u4e3eleader\u7684\u65b9\u5f0f\u662f\u201c\u5c11\u6570\u670d\u4ece\u591a\u6570\u201d\uff0cKafka\u5e76\u4e0d\u662f\u91c7\u7528\u8fd9\u79cd\u65b9\u5f0f\u3002\u8fd9\u79cd\u6a21\u5f0f\u4e0b\uff0c\u5982\u679c\u6211\u4eec\u67092f+1\u4e2a\u526f\u672c\uff0c\u90a3\u4e48\u5728commit\u4e4b\u524d\u5fc5\u987b\u4fdd\u8bc1\u6709f+1\u4e2areplica\u590d\u5236\u5b8c\u6d88\u606f\uff0c\u540c\u65f6\u4e3a\u4e86\u4fdd\u8bc1\u80fd\u6b63\u786e\u9009\u4e3e\u51fa\u65b0\u7684leader\uff0c\u5931\u8d25\u7684\u526f\u672c\u6570\u4e0d\u80fd\u8d85\u8fc7f\u4e2a\u3002\u8fd9\u79cd\u65b9\u5f0f\u6709\u4e2a\u5f88\u5927\u7684\u4f18\u52bf\uff0c\u7cfb\u7edf\u7684\u5ef6\u8fdf\u53d6\u51b3\u4e8e\u6700\u5feb\u7684\u51e0\u53f0\u673a\u5668\uff0c\u4e5f\u5c31\u662f\u8bf4\u6bd4\u5982\u526f\u672c\u6570\u4e3a3\uff0c\u90a3\u4e48\u5ef6\u8fdf\u5c31\u53d6\u51b3\u4e8e\u6700\u5feb\u7684\u90a3\u4e2afollower\u800c\u4e0d\u662f\u6700\u6162\u7684\u90a3\u4e2a\u3002<br \/>\n\u201c\u5c11\u6570\u670d\u4ece\u591a\u6570\u201d\u7684\u65b9\u5f0f\u4e5f\u6709\u4e00\u4e9b\u52a3\u52bf\uff0c\u4e3a\u4e86\u4fdd\u8bc1leader\u9009\u4e3e\u7684\u6b63\u5e38\u8fdb\u884c\uff0c\u5b83\u6240\u80fd\u5bb9\u5fcd\u7684\u5931\u8d25\u7684follower\u6570\u6bd4\u8f83\u5c11\uff0c\u5982\u679c\u8981\u5bb9\u5fcd1\u4e2afollower\u6302\u6389\uff0c\u90a3\u4e48\u81f3\u5c11\u89813\u4e2a\u4ee5\u4e0a\u7684\u526f\u672c\uff0c\u5982\u679c\u8981\u5bb9\u5fcd2\u4e2afollower\u6302\u6389\uff0c\u5fc5\u987b\u8981\u67095\u4e2a\u4ee5\u4e0a\u7684\u526f\u672c\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u5728\u751f\u4ea7\u73af\u5883\u4e0b\u4e3a\u4e86\u4fdd\u8bc1\u8f83\u9ad8\u7684\u5bb9\u9519\u7387\uff0c\u5fc5\u987b\u8981\u6709\u5927\u91cf\u7684\u526f\u672c\uff0c\u800c\u5927\u91cf\u7684\u526f\u672c\u53c8\u4f1a\u5728\u5927\u6570\u636e\u91cf\u4e0b\u5bfc\u81f4\u6027\u80fd\u7684\u6025\u5267\u4e0b\u964d\u3002\u8fd9\u79cd\u7b97\u6cd5\u66f4\u591a\u7528\u5728Zookeeper\u8fd9\u79cd\u5171\u4eab\u96c6\u7fa4\u914d\u7f6e\u7684\u7cfb\u7edf\u4e2d\u800c\u5f88\u5c11\u5728\u9700\u8981\u5927\u91cf\u6570\u636e\u7684\u7cfb\u7edf\u4e2d\u4f7f\u7528\u7684\u539f\u56e0\u3002HDFS\u7684HA\u529f\u80fd\u4e5f\u662f\u57fa\u4e8e\u201c\u5c11\u6570\u670d\u4ece\u591a\u6570\u201d\u7684\u65b9\u5f0f\uff0c\u4f46\u662f\u5176\u6570\u636e\u5b58\u50a8\u5e76\u4e0d\u662f\u91c7\u7528\u8fd9\u6837\u7684\u65b9\u5f0f\u3002<br \/>\n\u5b9e\u9645\u4e0a\uff0cleader\u9009\u4e3e\u7684\u7b97\u6cd5\u975e\u5e38\u591a\uff0c\u6bd4\u5982Zookeeper\u7684Zab\u3001Raft\u4ee5\u53caViewstamped Replication\u3002\u800cKafka\u6240\u4f7f\u7528\u7684leader\u9009\u4e3e\u7b97\u6cd5\u66f4\u50cf\u662f\u5fae\u8f6f\u7684PacificA\u7b97\u6cd5\u3002<br \/>\nKafka\u5728Zookeeper\u4e2d\u4e3a\u6bcf\u4e00\u4e2apartition\u52a8\u6001\u7684\u7ef4\u62a4\u4e86\u4e00\u4e2aISR\uff0c\u8fd9\u4e2aISR\u91cc\u7684\u6240\u6709replica\u90fd\u8ddf\u4e0a\u4e86leader\uff0c\u53ea\u6709ISR\u91cc\u7684\u6210\u5458\u624d\u80fd\u6709\u88ab\u9009\u4e3aleader\u7684\u53ef\u80fd\uff08unclean.leader.election.enable=false\uff09\u3002\u5728\u8fd9\u79cd\u6a21\u5f0f\u4e0b\uff0c\u5bf9\u4e8ef+1\u4e2a\u526f\u672c\uff0c\u4e00\u4e2aKafka topic\u80fd\u5728\u4fdd\u8bc1\u4e0d\u4e22\u5931\u5df2\u7ecfcommit\u6d88\u606f\u7684\u524d\u63d0\u4e0b\u5bb9\u5fcdf\u4e2a\u526f\u672c\u7684\u5931\u8d25\uff0c\u5728\u5927\u591a\u6570\u4f7f\u7528\u573a\u666f\u4e0b\uff0c\u8fd9\u79cd\u6a21\u5f0f\u662f\u5341\u5206\u6709\u5229\u7684\u3002\u4e8b\u5b9e\u4e0a\uff0c\u4e3a\u4e86\u5bb9\u5fcdf\u4e2a\u526f\u672c\u7684\u5931\u8d25\uff0c\u201c\u5c11\u6570\u670d\u4ece\u591a\u6570\u201d\u7684\u65b9\u5f0f\u548cISR\u5728commit\u524d\u9700\u8981\u7b49\u5f85\u7684\u526f\u672c\u7684\u6570\u91cf\u662f\u4e00\u6837\u7684\uff0c\u4f46\u662fISR\u9700\u8981\u7684\u603b\u7684\u526f\u672c\u7684\u4e2a\u6570\u51e0\u4e4e\u662f\u201c\u5c11\u6570\u670d\u4ece\u591a\u6570\u201d\u7684\u65b9\u5f0f\u7684\u4e00\u534a\u3002<br \/>\n\u4e0a\u6587\u63d0\u5230\uff0c\u5728ISR\u4e2d\u81f3\u5c11\u6709\u4e00\u4e2afollower\u65f6\uff0cKafka\u53ef\u4ee5\u786e\u4fdd\u5df2\u7ecfcommit\u7684\u6570\u636e\u4e0d\u4e22\u5931\uff0c\u4f46\u5982\u679c\u67d0\u4e00\u4e2apartition\u7684\u6240\u6709replica\u90fd\u6302\u4e86\uff0c\u5c31\u65e0\u6cd5\u4fdd\u8bc1\u6570\u636e\u4e0d\u4e22\u5931\u4e86\u3002\u8fd9\u79cd\u60c5\u51b5\u4e0b\u6709\u4e24\u79cd\u53ef\u884c\u7684\u65b9\u6848\uff1a<\/p>\n<ol class=\\\" list-paddingleft-2\\\">\n<li>\u7b49\u5f85ISR\u4e2d\u4efb\u610f\u4e00\u4e2areplica\u201c\u6d3b\u201d\u8fc7\u6765\uff0c\u5e76\u4e14\u9009\u5b83\u4f5c\u4e3aleader<\/li>\n<li>\u9009\u62e9\u7b2c\u4e00\u4e2a\u201c\u6d3b\u201d\u8fc7\u6765\u7684replica\uff08\u5e76\u4e0d\u4e00\u5b9a\u662f\u5728ISR\u4e2d\uff09\u4f5c\u4e3aleader<\/li>\n<\/ol>\n<p>\u8fd9\u5c31\u9700\u8981\u5728\u53ef\u7528\u6027\u548c\u4e00\u81f4\u6027\u5f53\u4e2d\u4f5c\u51fa\u4e00\u4e2a\u7b80\u5355\u7684\u6289\u62e9\u3002\u5982\u679c\u4e00\u5b9a\u8981\u7b49\u5f85ISR\u4e2d\u7684replica\u201c\u6d3b\u201d\u8fc7\u6765\uff0c\u90a3\u4e0d\u53ef\u7528\u7684\u65f6\u95f4\u5c31\u53ef\u80fd\u4f1a\u76f8\u5bf9\u8f83\u957f\u3002\u800c\u4e14\u5982\u679cISR\u4e2d\u6240\u6709\u7684replica\u90fd\u65e0\u6cd5\u201c\u6d3b\u201d\u8fc7\u6765\u4e86\uff0c\u6216\u8005\u6570\u636e\u4e22\u5931\u4e86\uff0c\u8fd9\u4e2apartition\u5c06\u6c38\u8fdc\u4e0d\u53ef\u7528\u3002\u9009\u62e9\u7b2c\u4e00\u4e2a\u201c\u6d3b\u201d\u8fc7\u6765\u7684replica\u4f5c\u4e3aleader,\u800c\u8fd9\u4e2areplica\u4e0d\u662fISR\u4e2d\u7684replica,\u90a3\u5373\u4f7f\u5b83\u5e76\u4e0d\u4fdd\u969c\u5df2\u7ecf\u5305\u542b\u4e86\u6240\u6709\u5df2commit\u7684\u6d88\u606f\uff0c\u5b83\u4e5f\u4f1a\u6210\u4e3aleader\u800c\u4f5c\u4e3aconsumer\u7684\u6570\u636e\u6e90\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0cKafka\u91c7\u7528\u7b2c\u4e8c\u79cd\u7b56\u7565\uff0c\u5373unclean.leader.election.enable=true\uff0c\u4e5f\u53ef\u4ee5\u5c06\u6b64\u53c2\u6570\u8bbe\u7f6e\u4e3afalse\u6765\u542f\u7528\u7b2c\u4e00\u79cd\u7b56\u7565\u3002<br \/>\nunclean.leader.election.enable\u8fd9\u4e2a\u53c2\u6570\u5bf9\u4e8eleader\u7684\u9009\u4e3e\u3001\u7cfb\u7edf\u7684\u53ef\u7528\u6027\u4ee5\u53ca\u6570\u636e\u7684\u53ef\u9760\u6027\u90fd\u6709\u81f3\u5173\u91cd\u8981\u7684\u5f71\u54cd\u3002\u4e0b\u9762\u6211\u4eec\u6765\u5206\u6790\u4e0b\u51e0\u79cd\u5178\u578b\u7684\u573a\u666f\u3002<br \/>\n\u5982\u679c\u4e0a\u56fe\u6240\u793a\uff0c\u5047\u8bbe\u67d0\u4e2apartition\u4e2d\u7684\u526f\u672c\u6570\u4e3a3\uff0creplica-0, replica-1, replica-2\u5206\u522b\u5b58\u653e\u5728broker0, broker1\u548cbroker2\u4e2d\u3002AR=(0,1,2)\uff0cISR=(0,1)\u3002\u8bbe\u7f6erequest.required.acks=-1, min.insync.replicas=2\uff0cunclean.leader.election.enable=false\u3002\u8fd9\u91cc\u8bb2broker0\u4e2d\u7684\u526f\u672c\u4e5f\u79f0\u4e4b\u4e3abroker0\u8d77\u521dbroker0\u4e3aleader\uff0cbroker1\u4e3afollower\u3002<\/p>\n<ul class=\\\" list-paddingleft-2\\\">\n<li>\u5f53ISR\u4e2d\u7684replica-0\u51fa\u73b0crash\u7684\u60c5\u51b5\u65f6\uff0cbroker1\u9009\u4e3e\u4e3a\u65b0\u7684leader[ISR=(1)]\uff0c\u56e0\u4e3a\u53d7min.insync.replicas=2\u5f71\u54cd\uff0cwrite\u4e0d\u80fd\u670d\u52a1\uff0c\u4f46\u662fread\u80fd\u7ee7\u7eed\u6b63\u5e38\u670d\u52a1\u3002\u6b64\u79cd\u60c5\u51b5\u6062\u590d\u65b9\u6848\uff1a\n<ol class=\\\" list-paddingleft-2\\\">\n<li>\u5c1d\u8bd5\u6062\u590d(\u91cd\u542f)replica-0\uff0c\u5982\u679c\u80fd\u8d77\u6765\uff0c\u7cfb\u7edf\u6b63\u5e38\uff1b<\/li>\n<li>\u5982\u679creplica-0\u4e0d\u80fd\u6062\u590d\uff0c\u9700\u8981\u5c06min.insync.replicas\u8bbe\u7f6e\u4e3a1\uff0c\u6062\u590dwrite\u529f\u80fd\u3002<\/li>\n<\/ol>\n<\/li>\n<li>\u5f53ISR\u4e2d\u7684replica-0\u51fa\u73b0crash\uff0c\u7d27\u63a5\u7740replica-1\u4e5f\u51fa\u73b0\u4e86crash, \u6b64\u65f6[ISR=(1),leader=-1],\u4e0d\u80fd\u5bf9\u5916\u63d0\u4f9b\u670d\u52a1\uff0c\u6b64\u79cd\u60c5\u51b5\u6062\u590d\u65b9\u6848\uff1a\n<ol class=\\\" list-paddingleft-2\\\">\n<li>\u5c1d\u8bd5\u6062\u590dreplica-0\u548creplica-1\uff0c\u5982\u679c\u90fd\u80fd\u8d77\u6765\uff0c\u5219\u7cfb\u7edf\u6062\u590d\u6b63\u5e38\uff1b<\/li>\n<li>\u5982\u679creplica-0\u8d77\u6765\uff0c\u800creplica-1\u4e0d\u80fd\u8d77\u6765\uff0c\u8fd9\u65f6\u5019\u4ecd\u7136\u4e0d\u80fd\u9009\u51faleader\uff0c\u56e0\u4e3a\u5f53\u8bbe\u7f6eunclean.leader.election.enable=false\u65f6\uff0cleader\u53ea\u80fd\u4eceISR\u4e2d\u9009\u4e3e\uff0c\u5f53ISR\u4e2d\u6240\u6709\u526f\u672c\u90fd\u5931\u6548\u4e4b\u540e\uff0c\u9700\u8981ISR\u4e2d\u6700\u540e\u5931\u6548\u7684\u90a3\u4e2a\u526f\u672c\u80fd\u6062\u590d\u4e4b\u540e\u624d\u80fd\u9009\u4e3eleader, \u5373replica-0\u5148\u5931\u6548\uff0creplica-1\u540e\u5931\u6548\uff0c\u9700\u8981replica-1\u6062\u590d\u540e\u624d\u80fd\u9009\u4e3eleader\u3002\u4fdd\u5b88\u7684\u65b9\u6848\u5efa\u8bae\u628aunclean.leader.election.enable\u8bbe\u7f6e\u4e3atrue,\u4f46\u662f\u8fd9\u6837\u4f1a\u6709\u4e22\u5931\u6570\u636e\u7684\u60c5\u51b5\u53d1\u751f\uff0c\u8fd9\u6837\u53ef\u4ee5\u6062\u590dread\u670d\u52a1\u3002\u540c\u6837\u9700\u8981\u5c06min.insync.replicas\u8bbe\u7f6e\u4e3a1\uff0c\u6062\u590dwrite\u529f\u80fd\uff1b<\/li>\n<li>replica-1\u6062\u590d\uff0creplica-0\u4e0d\u80fd\u6062\u590d\uff0c\u8fd9\u4e2a\u60c5\u51b5\u4e0a\u9762\u9047\u5230\u8fc7\uff0cread\u670d\u52a1\u53ef\u7528\uff0c\u9700\u8981\u5c06min.insync.replicas\u8bbe\u7f6e\u4e3a1\uff0c\u6062\u590dwrite\u529f\u80fd\uff1b<\/li>\n<li>replica-0\u548creplica-1\u90fd\u4e0d\u80fd\u6062\u590d\uff0c\u8fd9\u79cd\u60c5\u51b5\u53ef\u4ee5\u53c2\u8003\u60c5\u5f622.<\/li>\n<\/ol>\n<\/li>\n<li>\u5f53ISR\u4e2d\u7684replica-0, replica-1\u540c\u65f6\u5b95\u673a,\u6b64\u65f6[ISR=(0,1)],\u4e0d\u80fd\u5bf9\u5916\u63d0\u4f9b\u670d\u52a1\uff0c\u6b64\u79cd\u60c5\u51b5\u6062\u590d\u65b9\u6848\uff1a\u5c1d\u8bd5\u6062\u590dreplica-0\u548creplica-1\uff0c\u5f53\u5176\u4e2d\u4efb\u610f\u4e00\u4e2a\u526f\u672c\u6062\u590d\u6b63\u5e38\u65f6\uff0c\u5bf9\u5916\u53ef\u4ee5\u63d0\u4f9bread\u670d\u52a1\u3002\u76f4\u52302\u4e2a\u526f\u672c\u6062\u590d\u6b63\u5e38\uff0cwrite\u529f\u80fd\u624d\u80fd\u6062\u590d\uff0c\u6216\u8005\u5c06\u5c06min.insync.replicas\u8bbe\u7f6e\u4e3a1\u3002<\/li>\n<\/ul>\n<section>3.7 Kafka\u7684\u53d1\u9001\u6a21\u5f0f\u00a0 \u00a0<\/section>\n<p>Kafka\u7684\u53d1\u9001\u6a21\u5f0f\u7531producer\u7aef\u7684\u914d\u7f6e\u53c2\u6570producer.type\u6765\u8bbe\u7f6e\uff0c\u8fd9\u4e2a\u53c2\u6570\u6307\u5b9a\u4e86\u5728\u540e\u53f0\u7ebf\u7a0b\u4e2d\u6d88\u606f\u7684\u53d1\u9001\u65b9\u5f0f\u662f\u540c\u6b65\u7684\u8fd8\u662f\u5f02\u6b65\u7684\uff0c\u9ed8\u8ba4\u662f\u540c\u6b65\u7684\u65b9\u5f0f\uff0c\u5373producer.type=sync\u3002\u5982\u679c\u8bbe\u7f6e\u6210\u5f02\u6b65\u7684\u6a21\u5f0f\uff0c\u5373producer.type=async\uff0c\u53ef\u4ee5\u662fproducer\u4ee5batch\u7684\u5f62\u5f0fpush\u6570\u636e\uff0c\u8fd9\u6837\u4f1a\u6781\u5927\u7684\u63d0\u9ad8broker\u7684\u6027\u80fd\uff0c\u4f46\u662f\u8fd9\u6837\u4f1a\u589e\u52a0\u4e22\u5931\u6570\u636e\u7684\u98ce\u9669\u3002\u5982\u679c\u9700\u8981\u786e\u4fdd\u6d88\u606f\u7684\u53ef\u9760\u6027\uff0c\u5fc5\u987b\u8981\u5c06producer.type\u8bbe\u7f6e\u4e3async\u3002<br \/>\n\u5bf9\u4e8e\u5f02\u6b65\u6a21\u5f0f\uff0c\u8fd8\u67094\u4e2a\u914d\u5957\u7684\u53c2\u6570\uff0c\u5982\u4e0b\uff1a<\/p>\n<table width=\\\"668\\\">\n<thead>\n<tr class=\\\"firstRow\\\">\n<th align=\\\"center\\\" width=\\\"113\\\">Property<\/th>\n<th align=\\\"center\\\" width=\\\"395\\\">Description<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td width=\\\"101\\\">queue.buffering.max.ms<\/td>\n<td width=\\\"395\\\">\u9ed8\u8ba4\u503c\uff1a5000\u3002\u542f\u7528\u5f02\u6b65\u6a21\u5f0f\u65f6\uff0cproducer\u7f13\u5b58\u6d88\u606f\u7684\u65f6\u95f4\u3002\u6bd4\u5982\u6211\u4eec\u8bbe\u7f6e\u62101000\u65f6\uff0c\u5b83\u4f1a\u7f13\u5b581s\u7684\u6570\u636e\u518d\u4e00\u6b21\u53d1\u9001\u51fa\u53bb\uff0c\u8fd9\u6837\u53ef\u4ee5\u6781\u5927\u7684\u589e\u52a0broker\u541e\u5410\u91cf\uff0c\u4f46\u4e5f\u4f1a\u9020\u6210\u65f6\u6548\u6027\u7684\u964d\u4f4e\u3002<\/td>\n<\/tr>\n<tr>\n<td width=\\\"101\\\">queue.buffering.max.messages<\/td>\n<td width=\\\"395\\\">\u9ed8\u8ba4\u503c\uff1a10000\u3002\u542f\u7528\u5f02\u6b65\u6a21\u5f0f\u65f6\uff0cproducer\u7f13\u5b58\u961f\u5217\u91cc\u6700\u5927\u7f13\u5b58\u7684\u6d88\u606f\u6570\u91cf\uff0c\u5982\u679c\u8d85\u8fc7\u8fd9\u4e2a\u503c\uff0cproducer\u5c31\u4f1a\u963b\u585e\u6216\u8005\u4e22\u6389\u6d88\u606f\u3002<\/td>\n<\/tr>\n<tr>\n<td width=\\\"101\\\">queue.enqueue.timeout.ms<\/td>\n<td width=\\\"395\\\">\u9ed8\u8ba4\u503c\uff1a-1\u3002\u5f53\u8fbe\u5230\u4e0a\u9762\u53c2\u6570\u65f6producer\u4f1a\u963b\u585e\u7b49\u5f85\u7684\u65f6\u95f4\u3002\u5982\u679c\u8bbe\u7f6e\u4e3a0\uff0cbuffer\u961f\u5217\u6ee1\u65f6producer\u4e0d\u4f1a\u963b\u585e\uff0c\u6d88\u606f\u76f4\u63a5\u88ab\u4e22\u6389\uff1b\u82e5\u8bbe\u7f6e\u4e3a-1\uff0cproducer\u4f1a\u88ab\u963b\u585e\uff0c\u4e0d\u4f1a\u4e22\u6d88\u606f\u3002<\/td>\n<\/tr>\n<tr>\n<td width=\\\"101\\\">batch.num.messages<\/td>\n<td width=\\\"395\\\">\u9ed8\u8ba4\u503c\uff1a200\u3002\u542f\u7528\u5f02\u6b65\u6a21\u5f0f\u65f6\uff0c\u4e00\u4e2abatch\u7f13\u5b58\u7684\u6d88\u606f\u6570\u91cf\u3002\u8fbe\u5230\u8fd9\u4e2a\u6570\u503c\u65f6\uff0cproducer\u624d\u4f1a\u53d1\u9001\u6d88\u606f\u3002\uff08\u6bcf\u6b21\u6279\u91cf\u53d1\u9001\u7684\u6570\u91cf\uff09<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<blockquote><p>\u4ee5batch\u7684\u65b9\u5f0f\u63a8\u9001\u6570\u636e\u53ef\u4ee5\u6781\u5927\u7684\u63d0\u9ad8\u5904\u7406\u6548\u7387\uff0ckafka producer\u53ef\u4ee5\u5c06\u6d88\u606f\u5728\u5185\u5b58\u4e2d\u7d2f\u8ba1\u5230\u4e00\u5b9a\u6570\u91cf\u540e\u4f5c\u4e3a\u4e00\u4e2abatch\u53d1\u9001\u8bf7\u6c42\u3002batch\u7684\u6570\u91cf\u5927\u5c0f\u53ef\u4ee5\u901a\u8fc7producer\u7684\u53c2\u6570\uff08batch.num.messages\uff09\u63a7\u5236\u3002\u901a\u8fc7\u589e\u52a0batch\u7684\u5927\u5c0f\uff0c\u53ef\u4ee5\u51cf\u5c11\u7f51\u7edc\u8bf7\u6c42\u548c\u78c1\u76d8IO\u7684\u6b21\u6570\uff0c\u5f53\u7136\u5177\u4f53\u53c2\u6570\u8bbe\u7f6e\u9700\u8981\u5728\u6548\u7387\u548c\u65f6\u6548\u6027\u65b9\u9762\u505a\u4e00\u4e2a\u6743\u8861\u3002\u5728\u6bd4\u8f83\u65b0\u7684\u7248\u672c\u4e2d\u8fd8\u6709batch.size\u8fd9\u4e2a\u53c2\u6570\u3002<\/p><\/blockquote>\n<section>4 \u9ad8\u53ef\u9760\u6027\u4f7f\u7528\u5206\u6790\u00a0\u00a0<\/section>\n<section>4.1 \u6d88\u606f\u4f20\u8f93\u4fdd\u969c\u00a0 \u00a0<\/section>\n<p>\u524d\u9762\u5df2\u7ecf\u4ecb\u7ecd\u4e86Kafka\u5982\u4f55\u8fdb\u884c\u6709\u6548\u7684\u5b58\u50a8\uff0c\u4ee5\u53ca\u4e86\u89e3\u4e86producer\u548cconsumer\u5982\u4f55\u5de5\u4f5c\u3002\u63a5\u4e0b\u6765\u8ba8\u8bba\u7684\u662fKafka\u5982\u4f55\u786e\u4fdd\u6d88\u606f\u5728producer\u548cconsumer\u4e4b\u95f4\u4f20\u8f93\u3002\u6709\u4ee5\u4e0b\u4e09\u79cd\u53ef\u80fd\u7684\u4f20\u8f93\u4fdd\u969c\uff08delivery guarantee\uff09:<\/p>\n<ul class=\\\" list-paddingleft-2\\\">\n<li>At most once: \u6d88\u606f\u53ef\u80fd\u4f1a\u4e22\uff0c\u4f46\u7edd\u4e0d\u4f1a\u91cd\u590d\u4f20\u8f93<\/li>\n<li>At least once\uff1a\u6d88\u606f\u7edd\u4e0d\u4f1a\u4e22\uff0c\u4f46\u53ef\u80fd\u4f1a\u91cd\u590d\u4f20\u8f93<\/li>\n<li>Exactly once\uff1a\u6bcf\u6761\u6d88\u606f\u80af\u5b9a\u4f1a\u88ab\u4f20\u8f93\u4e00\u6b21\u4e14\u4ec5\u4f20\u8f93\u4e00\u6b21<\/li>\n<\/ul>\n<p>Kafka\u7684\u6d88\u606f\u4f20\u8f93\u4fdd\u969c\u673a\u5236\u975e\u5e38\u76f4\u89c2\u3002\u5f53producer\u5411broker\u53d1\u9001\u6d88\u606f\u65f6\uff0c\u4e00\u65e6\u8fd9\u6761\u6d88\u606f\u88abcommit\uff0c\u7531\u4e8e\u526f\u672c\u673a\u5236\uff08replication\uff09\u7684\u5b58\u5728\uff0c\u5b83\u5c31\u4e0d\u4f1a\u4e22\u5931\u3002\u4f46\u662f\u5982\u679cproducer\u53d1\u9001\u6570\u636e\u7ed9broker\u540e\uff0c\u9047\u5230\u7684\u7f51\u7edc\u95ee\u9898\u800c\u9020\u6210\u901a\u4fe1\u4e2d\u65ad\uff0c\u90a3producer\u5c31\u65e0\u6cd5\u5224\u65ad\u8be5\u6761\u6d88\u606f\u662f\u5426\u5df2\u7ecf\u63d0\u4ea4\uff08commit\uff09\u3002\u867d\u7136Kafka\u65e0\u6cd5\u786e\u5b9a\u7f51\u7edc\u6545\u969c\u671f\u95f4\u53d1\u751f\u4e86\u4ec0\u4e48\uff0c\u4f46\u662fproducer\u53ef\u4ee5retry\u591a\u6b21\uff0c\u786e\u4fdd\u6d88\u606f\u5df2\u7ecf\u6b63\u786e\u4f20\u8f93\u5230broker\u4e2d\uff0c\u6240\u4ee5\u76ee\u524dKafka\u5b9e\u73b0\u7684\u662fat least once\u3002<br \/>\nconsumer\u4ecebroker\u4e2d\u8bfb\u53d6\u6d88\u606f\u540e\uff0c\u53ef\u4ee5\u9009\u62e9commit\uff0c\u8be5\u64cd\u4f5c\u4f1a\u5728Zookeeper\u4e2d\u5b58\u4e0b\u8be5consumer\u5728\u8be5partition\u4e0b\u8bfb\u53d6\u7684\u6d88\u606f\u7684offset\u3002\u8be5consumer\u4e0b\u4e00\u6b21\u518d\u8bfb\u8be5partition\u65f6\u4f1a\u4ece\u4e0b\u4e00\u6761\u5f00\u59cb\u8bfb\u53d6\u3002\u5982\u672acommit\uff0c\u4e0b\u4e00\u6b21\u8bfb\u53d6\u7684\u5f00\u59cb\u4f4d\u7f6e\u4f1a\u8ddf\u4e0a\u4e00\u6b21commit\u4e4b\u540e\u7684\u5f00\u59cb\u4f4d\u7f6e\u76f8\u540c\u3002\u5f53\u7136\u4e5f\u53ef\u4ee5\u5c06consumer\u8bbe\u7f6e\u4e3aautocommit\uff0c\u5373consumer\u4e00\u65e6\u8bfb\u53d6\u5230\u6570\u636e\u7acb\u5373\u81ea\u52a8commit\u3002\u5982\u679c\u53ea\u8ba8\u8bba\u8fd9\u4e00\u8bfb\u53d6\u6d88\u606f\u7684\u8fc7\u7a0b\uff0c\u90a3Kafka\u662f\u786e\u4fdd\u4e86exactly once, \u4f46\u662f\u5982\u679c\u7531\u4e8e\u524d\u9762producer\u4e0ebroker\u4e4b\u95f4\u7684\u67d0\u79cd\u539f\u56e0\u5bfc\u81f4\u6d88\u606f\u7684\u91cd\u590d\uff0c\u90a3\u4e48\u8fd9\u91cc\u5c31\u662fat least once\u3002<br \/>\n\u8003\u8651\u8fd9\u6837\u4e00\u79cd\u60c5\u51b5\uff0c\u5f53consumer\u8bfb\u5b8c\u6d88\u606f\u4e4b\u540e\u5148commit\u518d\u5904\u7406\u6d88\u606f\uff0c\u5728\u8fd9\u79cd\u6a21\u5f0f\u4e0b\uff0c\u5982\u679cconsumer\u5728commit\u540e\u8fd8\u6ca1\u6765\u5f97\u53ca\u5904\u7406\u6d88\u606f\u5c31crash\u4e86\uff0c\u4e0b\u6b21\u91cd\u65b0\u5f00\u59cb\u5de5\u4f5c\u540e\u5c31\u65e0\u6cd5\u8bfb\u5230\u521a\u521a\u5df2\u63d0\u4ea4\u800c\u672a\u5904\u7406\u7684\u6d88\u606f\uff0c\u8fd9\u5c31\u5bf9\u5e94\u4e8eat most once\u4e86\u3002<br \/>\n\u8bfb\u5b8c\u6d88\u606f\u5148\u5904\u7406\u518dcommit\u3002\u8fd9\u79cd\u6a21\u5f0f\u4e0b\uff0c\u5982\u679c\u5904\u7406\u5b8c\u4e86\u6d88\u606f\u5728commit\u4e4b\u524dconsumer crash\u4e86\uff0c\u4e0b\u6b21\u91cd\u65b0\u5f00\u59cb\u5de5\u4f5c\u65f6\u8fd8\u4f1a\u5904\u7406\u521a\u521a\u672acommit\u7684\u6d88\u606f\uff0c\u5b9e\u9645\u4e0a\u8be5\u6d88\u606f\u5df2\u7ecf\u88ab\u5904\u7406\u8fc7\u4e86\uff0c\u8fd9\u5c31\u5bf9\u5e94\u4e8eat least once\u3002<br \/>\n\u8981\u505a\u5230exactly once\u5c31\u9700\u8981\u5f15\u5165\u6d88\u606f\u53bb\u91cd\u673a\u5236\u3002<\/p>\n<section>4.2 \u6d88\u606f\u53bb\u91cd\u00a0 \u00a0<\/section>\n<p>\u5982\u4e0a\u4e00\u8282\u6240\u8ff0\uff0cKafka\u5728producer\u7aef\u548cconsumer\u7aef\u90fd\u4f1a\u51fa\u73b0\u6d88\u606f\u7684\u91cd\u590d\uff0c\u8fd9\u5c31\u9700\u8981\u53bb\u91cd\u5904\u7406\u3002<br \/>\nKafka\u6587\u6863\u4e2d\u63d0\u53caGUID(Globally Unique Identifier)\u7684\u6982\u5ff5\uff0c\u901a\u8fc7\u5ba2\u6237\u7aef\u751f\u6210\u7b97\u6cd5\u5f97\u5230\u6bcf\u4e2a\u6d88\u606f\u7684unique id\uff0c\u540c\u65f6\u53ef\u6620\u5c04\u81f3broker\u4e0a\u5b58\u50a8\u7684\u5730\u5740\uff0c\u5373\u901a\u8fc7GUID\u4fbf\u53ef\u67e5\u8be2\u63d0\u53d6\u6d88\u606f\u5185\u5bb9\uff0c\u4e5f\u4fbf\u4e8e\u53d1\u9001\u65b9\u7684\u5e42\u7b49\u6027\u4fdd\u8bc1\uff0c\u9700\u8981\u5728broker\u4e0a\u63d0\u4f9b\u6b64\u53bb\u91cd\u5904\u7406\u6a21\u5757\uff0c\u76ee\u524d\u7248\u672c\u5c1a\u4e0d\u652f\u6301\u3002<br \/>\n\u9488\u5bf9GUID, \u5982\u679c\u4ece\u5ba2\u6237\u7aef\u7684\u89d2\u5ea6\u53bb\u91cd\uff0c\u90a3\u4e48\u9700\u8981\u5f15\u5165\u96c6\u4e2d\u5f0f\u7f13\u5b58\uff0c\u5fc5\u7136\u4f1a\u589e\u52a0\u4f9d\u8d56\u590d\u6742\u5ea6\uff0c\u53e6\u5916\u7f13\u5b58\u7684\u5927\u5c0f\u96be\u4ee5\u754c\u5b9a\u3002<br \/>\n\u4e0d\u53ea\u662fKafka, \u7c7b\u4f3cRabbitMQ\u4ee5\u53caRocketMQ\u8fd9\u7c7b\u5546\u4e1a\u7ea7\u4e2d\u95f4\u4ef6\u4e5f\u53ea\u4fdd\u969cat least once, \u4e14\u4e5f\u65e0\u6cd5\u4ece\u81ea\u8eab\u53bb\u8fdb\u884c\u6d88\u606f\u53bb\u91cd\u3002\u6240\u4ee5\u6211\u4eec\u5efa\u8bae\u4e1a\u52a1\u65b9\u6839\u636e\u81ea\u8eab\u7684\u4e1a\u52a1\u7279\u70b9\u8fdb\u884c\u53bb\u91cd\uff0c\u6bd4\u5982\u4e1a\u52a1\u6d88\u606f\u672c\u8eab\u5177\u5907\u5e42\u7b49\u6027\uff0c\u6216\u8005\u501f\u52a9Redis\u7b49\u5176\u4ed6\u4ea7\u54c1\u8fdb\u884c\u53bb\u91cd\u5904\u7406\u3002<\/p>\n<section>4.3 \u9ad8\u53ef\u9760\u6027\u914d\u7f6e\u00a0 \u00a0<\/section>\n<p>Kafka\u63d0\u4f9b\u4e86\u5f88\u9ad8\u7684\u6570\u636e\u5197\u4f59\u5f39\u6027\uff0c\u5bf9\u4e8e\u9700\u8981\u6570\u636e\u9ad8\u53ef\u9760\u6027\u7684\u573a\u666f\uff0c\u6211\u4eec\u53ef\u4ee5\u589e\u52a0\u6570\u636e\u5197\u4f59\u5907\u4efd\u6570\uff08replication.factor\uff09\uff0c\u8c03\u9ad8\u6700\u5c0f\u5199\u5165\u526f\u672c\u6570\u7684\u4e2a\u6570\uff08min.insync.replicas\uff09\u7b49\u7b49\uff0c\u4f46\u662f\u8fd9\u6837\u4f1a\u5f71\u54cd\u6027\u80fd\u3002\u53cd\u4e4b\uff0c\u6027\u80fd\u63d0\u9ad8\u800c\u53ef\u9760\u6027\u5219\u964d\u4f4e\uff0c\u7528\u6237\u9700\u8981\u81ea\u8eab\u4e1a\u52a1\u7279\u6027\u5728\u5f7c\u6b64\u4e4b\u95f4\u505a\u4e00\u4e9b\u6743\u8861\u6027\u9009\u62e9\u3002<br \/>\n\u8981\u4fdd\u8bc1\u6570\u636e\u5199\u5165\u5230Kafka\u662f\u5b89\u5168\u7684\uff0c\u9ad8\u53ef\u9760\u7684\uff0c\u9700\u8981\u5982\u4e0b\u7684\u914d\u7f6e\uff1a<\/p>\n<ul class=\\\" list-paddingleft-2\\\">\n<li>topic\u7684\u914d\u7f6e\uff1areplication.factor&gt;=3,\u5373\u526f\u672c\u6570\u81f3\u5c11\u662f3\u4e2a\uff1b2&lt;=min.insync.replicas&lt;=replication.factor<\/li>\n<li>broker\u7684\u914d\u7f6e\uff1aleader\u7684\u9009\u4e3e\u6761\u4ef6unclean.leader.election.enable=false<\/li>\n<li>producer\u7684\u914d\u7f6e\uff1arequest.required.acks=-1(all)\uff0cproducer.type=sync<\/li>\n<\/ul>\n<section>5 BenchMark\u00a0 \u00a0<\/section>\n<p>Kafka\u5728\u552f\u54c1\u4f1a\u6709\u7740\u5f88\u6df1\u7684\u5386\u53f2\u6e0a\u6e90\uff0c\u6839\u636e\u552f\u54c1\u4f1a\u6d88\u606f\u4e2d\u95f4\u4ef6\u56e2\u961f\uff08VMS\u56e2\u961f\uff09\u6240\u638c\u63e1\u7684\u8d44\u6599\u663e\u793a\uff0c\u5728VMS\u56e2\u961f\u8fd0\u8f6c\u7684Kafka\u96c6\u7fa4\u4e2d\u6240\u652f\u6491\u7684topic\u6570\u5df2\u63a5\u8fd12000\uff0c\u6bcf\u5929\u7684\u8bf7\u6c42\u91cf\u4e5f\u5df2\u8fbe\u767e\u4ebf\u7ea7\u3002\u8fd9\u91cc\u5c31\u4ee5Kafka\u7684\u9ad8\u53ef\u9760\u6027\u4e3a\u57fa\u51c6\u70b9\u6765\u63a2\u7a76\u51e0\u79cd\u4e0d\u540c\u573a\u666f\u4e0b\u7684\u884c\u4e3a\u8868\u73b0\uff0c\u4ee5\u6b64\u6765\u52a0\u6df1\u5bf9Kafka\u7684\u8ba4\u77e5\uff0c\u4e3a\u5927\u5bb6\u5728\u4ee5\u540e\u9ad8\u6548\u7684\u4f7f\u7528Kafka\u65f6\u63d0\u4f9b\u4e00\u4efd\u4f9d\u636e\u3002<\/p>\n<section>5.1 \u6d4b\u8bd5\u73af\u5883\u00a0 \u00a0<\/section>\n<p>Kafka broker\u7528\u5230\u4e864\u53f0\u673a\u5668\uff0c\u5206\u522b\u4e3abroker[0\/1\/2\/3]\u914d\u7f6e\u5982\u4e0b\uff1a<\/p>\n<ul class=\\\" list-paddingleft-2\\\">\n<li>CPU: 24core\/2.6GHZ<\/li>\n<li>Memory: 62G<\/li>\n<li>Network: 4000Mb<\/li>\n<li>OS\/kernel: CentOs release 6.6 (Final)<\/li>\n<li>Disk: 1089G<\/li>\n<li>Kafka\u7248\u672c\uff1a0.10.1.0<\/li>\n<\/ul>\n<p>broker\u7aefJVM\u53c2\u6570\u8bbe\u7f6e\uff1a-Xmx8G -Xms8G -server -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -XX:+CMSClassUnloadingEnabled -XX:+CMSScavengeBeforeRemark -XX:+DisableExplicitGC -Djava.awt.headless=true -Xloggc:\/apps\/service\/kafka\/bin\/..\/logs\/kafkaServer-gc.log -verbose:gc -XX:+PrintGCDetails -XX:+PrintGCDateStamps -XX:+PrintGCTimeStamps -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.port=9999<br \/>\n\u5ba2\u6237\u7aef\u673a\u5668\u914d\u7f6e\uff1a<\/p>\n<ul class=\\\" list-paddingleft-2\\\">\n<li>CPU: 24core\/2.6GHZ<\/li>\n<li>Memory: 3G<\/li>\n<li>Network: 1000Mb<\/li>\n<li>OS\/kernel: CentOs release 6.3 (Final)<\/li>\n<li>Disk: 240G<\/li>\n<\/ul>\n<section>5.2 \u4e0d\u540c\u573a\u666f\u6d4b\u8bd5\u00a0 \u00a0<\/section>\n<p><strong>\u573a\u666f1\uff1a\u6d4b\u8bd5\u4e0d\u540c\u7684\u526f\u672c\u6570\u3001min.insync.replicas\u7b56\u7565\u4ee5\u53carequest.required.acks\u7b56\u7565\uff08\u4ee5\u4e0b\u7b80\u79f0acks\u7b56\u7565\uff09\u5bf9\u4e8e\u53d1\u9001\u901f\u5ea6\uff08TPS\uff09\u7684\u5f71\u54cd\u3002<\/strong><br \/>\n\u5177\u4f53\u914d\u7f6e\uff1a\u4e00\u4e2aproducer\uff1b\u53d1\u9001\u65b9\u5f0f\u4e3async\uff1b\u6d88\u606f\u4f53\u5927\u5c0f\u4e3a1kB\uff1bpartition\u6570\u4e3a12\u3002\u526f\u672c\u6570\u4e3a\uff1a1\/2\/4\uff1bmin.insync.replicas\u5206\u522b\u4e3a1\/2\/4\uff1backs\u5206\u522b\u4e3a-1\uff08all\uff09\/1\/0\u3002<br \/>\n\u5177\u4f53\u6d4b\u8bd5\u6570\u636e\u5982\u4e0b\u8868\uff08min.insync.replicas\u53ea\u5728acks=-1\u65f6\u6709\u6548\uff09\uff1a<\/p>\n<table width=\\\"668\\\">\n<thead>\n<tr class=\\\"firstRow\\\">\n<th align=\\\"center\\\" width=\\\"92\\\">acks<\/th>\n<th align=\\\"center\\\" width=\\\"99\\\">replicas<\/th>\n<th align=\\\"center\\\" width=\\\"95\\\">min.insync.replicas<\/th>\n<th align=\\\"center\\\" width=\\\"68\\\">retries<\/th>\n<th align=\\\"center\\\" width=\\\"85\\\">TPS<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td width=\\\"93\\\">-1<\/td>\n<td width=\\\"99\\\">1<\/td>\n<td width=\\\"95\\\">1<\/td>\n<td width=\\\"69\\\">0<\/td>\n<td width=\\\"85\\\">28511.3<\/td>\n<\/tr>\n<tr>\n<td width=\\\"94\\\">-1<\/td>\n<td width=\\\"99\\\">2<\/td>\n<td width=\\\"95\\\">1<\/td>\n<td width=\\\"70\\\">0<\/td>\n<td width=\\\"85\\\">22359.5<\/td>\n<\/tr>\n<tr>\n<td width=\\\"95\\\">-1<\/td>\n<td width=\\\"99\\\">2<\/td>\n<td width=\\\"95\\\">2<\/td>\n<td width=\\\"71\\\">0<\/td>\n<td width=\\\"85\\\">22927.4<\/td>\n<\/tr>\n<tr>\n<td width=\\\"95\\\">-1<\/td>\n<td width=\\\"99\\\">4<\/td>\n<td width=\\\"95\\\">1<\/td>\n<td width=\\\"71\\\">0<\/td>\n<td width=\\\"85\\\">16193.9<\/td>\n<\/tr>\n<tr>\n<td width=\\\"95\\\">-1<\/td>\n<td width=\\\"99\\\">4<\/td>\n<td width=\\\"95\\\">2<\/td>\n<td width=\\\"71\\\">0<\/td>\n<td width=\\\"85\\\">16599.9<\/td>\n<\/tr>\n<tr>\n<td width=\\\"95\\\">-1<\/td>\n<td width=\\\"99\\\">4<\/td>\n<td width=\\\"95\\\">4<\/td>\n<td width=\\\"71\\\">0<\/td>\n<td width=\\\"85\\\">16680.3<\/td>\n<\/tr>\n<tr>\n<td width=\\\"95\\\">0<\/td>\n<td width=\\\"99\\\">1<\/td>\n<td width=\\\"95\\\">N\/A<\/td>\n<td width=\\\"71\\\">0<\/td>\n<td width=\\\"85\\\">45353.8<\/td>\n<\/tr>\n<tr>\n<td width=\\\"95\\\">0<\/td>\n<td width=\\\"99\\\">2<\/td>\n<td width=\\\"95\\\">N\/A<\/td>\n<td width=\\\"71\\\">0<\/td>\n<td width=\\\"85\\\">46426.5<\/td>\n<\/tr>\n<tr>\n<td width=\\\"95\\\">0<\/td>\n<td width=\\\"99\\\">4<\/td>\n<td width=\\\"95\\\">N\/A<\/td>\n<td width=\\\"71\\\">0<\/td>\n<td width=\\\"85\\\">46764.2<\/td>\n<\/tr>\n<tr>\n<td width=\\\"95\\\">1<\/td>\n<td width=\\\"99\\\">1<\/td>\n<td width=\\\"95\\\">N\/A<\/td>\n<td width=\\\"71\\\">0<\/td>\n<td width=\\\"85\\\">33950.3<\/td>\n<\/tr>\n<tr>\n<td width=\\\"95\\\">1<\/td>\n<td width=\\\"99\\\">2<\/td>\n<td width=\\\"95\\\">N\/A<\/td>\n<td width=\\\"71\\\">0<\/td>\n<td width=\\\"85\\\">32192.2<\/td>\n<\/tr>\n<tr>\n<td width=\\\"95\\\">1<\/td>\n<td width=\\\"99\\\">4<\/td>\n<td width=\\\"95\\\">N\/A<\/td>\n<td width=\\\"71\\\">0<\/td>\n<td width=\\\"85\\\">32275.9<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u6d4b\u8bd5\u7ed3\u679c\u5206\u6790\uff1a<\/p>\n<ul class=\\\" list-paddingleft-2\\\">\n<li>\u5ba2\u6237\u7aef\u7684acks\u7b56\u7565\u5bf9\u53d1\u9001\u7684TPS\u6709\u8f83\u5927\u7684\u5f71\u54cd\uff0cTPS\uff1aacks_0 &gt; acks_1 &gt; ack_-1;<\/li>\n<li>\u526f\u672c\u6570\u8d8a\u9ad8\uff0cTPS\u8d8a\u4f4e\uff1b\u526f\u672c\u6570\u4e00\u81f4\u65f6\uff0cmin.insync.replicas\u4e0d\u5f71\u54cdTPS\uff1b<\/li>\n<li>acks=0\/1\u65f6\uff0cTPS\u4e0emin.insync.replicas\u53c2\u6570\u4ee5\u53ca\u526f\u672c\u6570\u65e0\u5173\uff0c\u4ec5\u53d7acks\u7b56\u7565\u7684\u5f71\u54cd\u3002<\/li>\n<\/ul>\n<p>\u4e0b\u9762\u5c06partition\u7684\u4e2a\u6570\u8bbe\u7f6e\u4e3a1\uff0c\u6765\u8fdb\u4e00\u6b65\u786e\u8ba4\u4e0b\u4e0d\u540c\u7684acks\u7b56\u7565\u3001\u4e0d\u540c\u7684min.insync.replicas\u7b56\u7565\u4ee5\u53ca\u4e0d\u540c\u7684\u526f\u672c\u6570\u5bf9\u4e8e\u53d1\u9001\u901f\u5ea6\u7684\u5f71\u54cd\uff0c\u8be6\u7ec6\u8bf7\u770b\u60c5\u666f2\u548c\u60c5\u666f3\u3002<br \/>\n<strong>\u573a\u666f2\uff1a\u5728partition\u4e2a\u6570\u56fa\u5b9a\u4e3a1\uff0c\u6d4b\u8bd5\u4e0d\u540c\u7684\u526f\u672c\u6570\u548cmin.insync.replicas\u7b56\u7565\u5bf9\u53d1\u9001\u901f\u5ea6\u7684\u5f71\u54cd\u3002<\/strong><br \/>\n\u5177\u4f53\u914d\u7f6e\uff1a\u4e00\u4e2aproducer\uff1b\u53d1\u9001\u65b9\u5f0f\u4e3async\uff1b\u6d88\u606f\u4f53\u5927\u5c0f\u4e3a1kB\uff1bproducer\u7aefacks=-1(all)\u3002\u53d8\u6362\u526f\u672c\u6570\uff1a2\/3\/4\uff1b min.insync.replicas\u8bbe\u7f6e\u4e3a\uff1a1\/2\/4\u3002<br \/>\n\u6d4b\u8bd5\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n<table width=\\\"668\\\">\n<thead>\n<tr class=\\\"firstRow\\\">\n<th align=\\\"center\\\" width=\\\"154\\\">replicas<\/th>\n<th align=\\\"center\\\" width=\\\"170\\\">min.insync.replicas<\/th>\n<th align=\\\"center\\\" width=\\\"177\\\">TPS<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td width=\\\"139\\\">2<\/td>\n<td width=\\\"170\\\">1<\/td>\n<td width=\\\"176\\\">9738.8<\/td>\n<\/tr>\n<tr>\n<td width=\\\"139\\\">2<\/td>\n<td width=\\\"170\\\">2<\/td>\n<td width=\\\"176\\\">9701.6<\/td>\n<\/tr>\n<tr>\n<td width=\\\"139\\\">3<\/td>\n<td width=\\\"170\\\">1<\/td>\n<td width=\\\"176\\\">8999.7<\/td>\n<\/tr>\n<tr>\n<td width=\\\"139\\\">3<\/td>\n<td width=\\\"170\\\">2<\/td>\n<td width=\\\"176\\\">9243.1<\/td>\n<\/tr>\n<tr>\n<td width=\\\"139\\\">4<\/td>\n<td width=\\\"170\\\">1<\/td>\n<td width=\\\"176\\\">9005.8<\/td>\n<\/tr>\n<tr>\n<td width=\\\"139\\\">4<\/td>\n<td width=\\\"170\\\">2<\/td>\n<td width=\\\"176\\\">8216.9<\/td>\n<\/tr>\n<tr>\n<td width=\\\"139\\\">4<\/td>\n<td width=\\\"170\\\">4<\/td>\n<td width=\\\"176\\\">9092.4<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u6d4b\u8bd5\u7ed3\u679c\u5206\u6790\uff1a\u526f\u672c\u6570\u8d8a\u9ad8\uff0cTPS\u8d8a\u4f4e\uff08\u8fd9\u70b9\u4e0e\u573a\u666f1\u7684\u6d4b\u8bd5\u7ed3\u8bba\u543b\u5408\uff09\uff0c\u4f46\u662f\u5f53partition\u6570\u4e3a1\u65f6\u5dee\u8ddd\u751a\u5fae\u3002min.insync.replicas\u4e0d\u5f71\u54cdTPS\u3002<br \/>\n<strong>\u573a\u666f3\uff1a\u5728partition\u4e2a\u6570\u56fa\u5b9a\u4e3a1\uff0c\u6d4b\u8bd5\u4e0d\u540c\u7684acks\u7b56\u7565\u548c\u526f\u672c\u6570\u5bf9\u53d1\u9001\u901f\u5ea6\u7684\u5f71\u54cd\u3002<\/strong><br \/>\n\u5177\u4f53\u914d\u7f6e\uff1a\u4e00\u4e2aproducer\uff1b\u53d1\u9001\u65b9\u5f0f\u4e3async\uff1b\u6d88\u606f\u4f53\u5927\u5c0f\u4e3a1kB\uff1bmin.insync.replicas=1\u3002topic\u526f\u672c\u6570\u4e3a\uff1a1\/2\/4\uff1backs\uff1a 0\/1\/-1\u3002<br \/>\n\u6d4b\u8bd5\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n<table width=\\\"668\\\">\n<thead>\n<tr class=\\\"firstRow\\\">\n<th align=\\\"center\\\" width=\\\"141\\\">replicas<\/th>\n<th align=\\\"center\\\" width=\\\"169\\\">acks<\/th>\n<th align=\\\"center\\\" width=\\\"184\\\">TPS<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td width=\\\"126\\\">1<\/td>\n<td width=\\\"168\\\">0<\/td>\n<td width=\\\"181\\\">76696<\/td>\n<\/tr>\n<tr>\n<td width=\\\"126\\\">2<\/td>\n<td width=\\\"168\\\">0<\/td>\n<td width=\\\"181\\\">57503<\/td>\n<\/tr>\n<tr>\n<td width=\\\"126\\\">4<\/td>\n<td width=\\\"168\\\">0<\/td>\n<td width=\\\"181\\\">59367<\/td>\n<\/tr>\n<tr>\n<td width=\\\"126\\\">1<\/td>\n<td width=\\\"168\\\">1<\/td>\n<td width=\\\"181\\\">19489<\/td>\n<\/tr>\n<tr>\n<td width=\\\"126\\\">2<\/td>\n<td width=\\\"168\\\">1<\/td>\n<td width=\\\"181\\\">20404<\/td>\n<\/tr>\n<tr>\n<td width=\\\"126\\\">4<\/td>\n<td width=\\\"168\\\">1<\/td>\n<td width=\\\"181\\\">18365<\/td>\n<\/tr>\n<tr>\n<td width=\\\"126\\\">1<\/td>\n<td width=\\\"168\\\">-1<\/td>\n<td width=\\\"181\\\">18641<\/td>\n<\/tr>\n<tr>\n<td width=\\\"126\\\">2<\/td>\n<td width=\\\"168\\\">-1<\/td>\n<td width=\\\"181\\\">9739<\/td>\n<\/tr>\n<tr>\n<td width=\\\"126\\\">4<\/td>\n<td width=\\\"168\\\">-1<\/td>\n<td width=\\\"181\\\">9006<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u6d4b\u8bd5\u7ed3\u679c\u5206\u6790\uff08\u4e0e\u60c5\u666f1\u4e00\u81f4\uff09\uff1a<\/p>\n<ul class=\\\" list-paddingleft-2\\\">\n<li>\u526f\u672c\u6570\u8d8a\u591a\uff0cTPS\u8d8a\u4f4e\uff1b<\/li>\n<li>\u5ba2\u6237\u7aef\u7684acks\u7b56\u7565\u5bf9\u53d1\u9001\u7684TPS\u6709\u8f83\u5927\u7684\u5f71\u54cd\uff0cTPS\uff1aacks_0 &gt; acks_1 &gt; ack_-1\u3002<\/li>\n<\/ul>\n<p><strong>\u573a\u666f4\uff1a\u6d4b\u8bd5\u4e0d\u540cpartition\u6570\u5bf9\u53d1\u9001\u901f\u7387\u7684\u5f71\u54cd<\/strong><br \/>\n\u5177\u4f53\u914d\u7f6e\uff1a\u4e00\u4e2aproducer\uff1b\u6d88\u606f\u4f53\u5927\u5c0f\u4e3a1KB\uff1b\u53d1\u9001\u65b9\u5f0f\u4e3async\uff1btopic\u526f\u672c\u6570\u4e3a2\uff1bmin.insync.replicas=2\uff1backs=-1\u3002partition\u6570\u91cf\u8bbe\u7f6e\u4e3a1\/2\/4\/8\/12\u3002<br \/>\n\u6d4b\u8bd5\u7ed3\u679c\uff1a<br \/>\n<img class=\\\"\\\" src=\\\"https:\/\/notecdn.yiban.io\/cloud_res\/521685660\/imgs\/20-6-8_09:16:18.839_33911.png\\\" width=\\\"100%\\\" \/><br \/>\n\u6d4b\u8bd5\u7ed3\u679c\u5206\u6790\uff1apartition\u7684\u4e0d\u540c\u4f1a\u5f71\u54cdTPS\uff0c\u968f\u7740partition\u7684\u4e2a\u6570\u7684\u589e\u957fTPS\u4f1a\u6709\u6240\u589e\u957f\uff0c\u4f46\u5e76\u4e0d\u662f\u4e00\u76f4\u6210\u6b63\u6bd4\u5173\u7cfb\uff0c\u5230\u8fbe\u4e00\u5b9a\u4e34\u754c\u503c\u65f6\uff0cpartition\u6570\u91cf\u7684\u589e\u52a0\u53cd\u800c\u4f1a\u4f7fTPS\u7565\u5fae\u964d\u4f4e\u3002<br \/>\n<strong>\u573a\u666f5\uff1a\u901a\u8fc7\u5c06\u96c6\u7fa4\u4e2d\u90e8\u5206broker\u8bbe\u7f6e\u6210\u4e0d\u53ef\u670d\u52a1\u72b6\u6001\uff0c\u6d4b\u8bd5\u5bf9\u5ba2\u6237\u7aef\u4ee5\u53ca\u6d88\u606f\u843d\u76d8\u7684\u5f71\u54cd\u3002<\/strong><br \/>\n\u5177\u4f53\u914d\u7f6e\uff1a\u4e00\u4e2aproducer\uff1b\u6d88\u606f\u4f53\u5927\u5c0f1KB;\u53d1\u9001\u65b9\u5f0f\u4e3async\uff1btopic\u526f\u672c\u6570\u4e3a4\uff1bmin.insync.replicas\u8bbe\u7f6e\u4e3a2\uff1backs=-1\uff1bretries=0\/100000000\uff1bpartition\u6570\u4e3a12\u3002<br \/>\n\u5177\u4f53\u6d4b\u8bd5\u6570\u636e\u5982\u4e0b\u8868\uff1a<\/p>\n<table width=\\\"668\\\">\n<thead>\n<tr class=\\\"firstRow\\\">\n<th align=\\\"center\\\" width=\\\"35\\\">acks<\/th>\n<th align=\\\"center\\\" width=\\\"38\\\">replicas<\/th>\n<th align=\\\"center\\\" width=\\\"48\\\">min.insync.replicas<\/th>\n<th align=\\\"center\\\" width=\\\"52\\\">retries<\/th>\n<th align=\\\"center\\\" width=\\\"54\\\">\u6d4b\u8bd5\u65b9\u6cd5<\/th>\n<th align=\\\"center\\\" width=\\\"46\\\">TPS<\/th>\n<th align=\\\"center\\\" width=\\\"46\\\">\u6570\u636e\u843d\u76d8<\/th>\n<th align=\\\"center\\\" width=\\\"64\\\">\u51fa\u73b0\u9519\u8bef<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td width=\\\"22\\\">-1<\/td>\n<td width=\\\"38\\\">4<\/td>\n<td width=\\\"48\\\">2<\/td>\n<td width=\\\"51\\\">0<\/td>\n<td width=\\\"53\\\">\u53d1\u9001\u8fc7\u7a0b\u4e2dkill\u4e24\u53f0broker<\/td>\n<td width=\\\"46\\\">12840<\/td>\n<td width=\\\"46\\\">\u4e00\u81f4\uff08\u90e8\u5206\u6570\u636e\u53ef\u843d\u76d8\uff0c\u90e8\u5206\u5931\u8d25\uff09<\/td>\n<td width=\\\"60\\\">\u9519\u8bef1<\/td>\n<\/tr>\n<tr>\n<td width=\\\"22\\\">-1<\/td>\n<td width=\\\"38\\\">4<\/td>\n<td width=\\\"48\\\">2<\/td>\n<td width=\\\"51\\\">100000000<\/td>\n<td width=\\\"53\\\">\u53d1\u9001\u8fc7\u7a0b\u4e2dkill\u4e24\u53f0broker<\/td>\n<td width=\\\"46\\\">13870<\/td>\n<td width=\\\"46\\\">\u4e00\u81f4\uff08\u6d88\u606f\u6709\u91cd\u590d\u843d\u76d8\uff09<\/td>\n<td width=\\\"61\\\">\u9519\u8bef2<\/td>\n<\/tr>\n<tr>\n<td width=\\\"22\\\">-1<\/td>\n<td width=\\\"38\\\">4<\/td>\n<td width=\\\"48\\\">2<\/td>\n<td width=\\\"51\\\">100000000<\/td>\n<td width=\\\"53\\\">\u53d1\u9001\u8fc7\u7a0b\u4e2dkill\u4e09\u53f0broker\uff0c\u4e4b\u540e\u91cd\u542f<\/td>\n<td width=\\\"46\\\">N\/A<\/td>\n<td width=\\\"46\\\">\u4e00\u81f4\uff08\u6d88\u606f\u6709\u91cd\u590d\u843d\u76d8\uff09<\/td>\n<td width=\\\"62\\\">\u9519\u8bef2\u30013\u30014<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u51fa\u9519\u4fe1\u606f\uff1a<\/p>\n<ul class=\\\" list-paddingleft-2\\\">\n<li>\u9519\u8bef1\uff1a\u5ba2\u6237\u7aef\u8fd4\u56de\u5f02\u5e38\uff0c\u90e8\u5206\u6570\u636e\u53ef\u843d\u76d8\uff0c\u90e8\u5206\u5931\u8d25\uff1aorg.apache.kafka.common.errors.NetworkException: The server disconnected before a response was received.<\/li>\n<li>\u9519\u8bef2\uff1a[WARN]internals.Sender &#8211; Got error produce response with correlation id 19369 on topic-partition default_channel_replicas_4_1-3, retrying (999999999 attempts left). Error: NETWORK_EXCEPTION<\/li>\n<li>\u9519\u8bef3\uff1a [WARN]internals.Sender &#8211; Got error produce response with correlation id 77890 on topic-partition default_channel_replicas_4_1-8, retrying (999999859 attempts left). Error: NOT_ENOUGH_REPLICAS<\/li>\n<li>\u9519\u8bef4\uff1a [WARN]internals.Sender &#8211; Got error produce response with correlation id 77705 on topic-partition default_channel_replicas_4_1-3, retrying (999999999 attempts left). Error: NOT_ENOUGH_REPLICAS_AFTER_APPEND<\/li>\n<\/ul>\n<p>\u6d4b\u8bd5\u7ed3\u679c\u5206\u6790\uff1a<\/p>\n<ul class=\\\" list-paddingleft-2\\\">\n<li>kill\u4e24\u53f0broker\u540e\uff0c\u5ba2\u6237\u7aef\u53ef\u4ee5\u7ee7\u7eed\u53d1\u9001\u3002broker\u51cf\u5c11\u540e\uff0cpartition\u7684leader\u5206\u5e03\u5728\u5269\u4f59\u7684\u4e24\u53f0broker\u4e0a\uff0c\u9020\u6210\u4e86TPS\u7684\u51cf\u5c0f\uff1b<\/li>\n<li>kill\u4e09\u53f0broker\u540e\uff0c\u5ba2\u6237\u7aef\u65e0\u6cd5\u7ee7\u7eed\u53d1\u9001\u3002Kafka\u7684\u81ea\u52a8\u91cd\u8bd5\u529f\u80fd\u5f00\u59cb\u8d77\u4f5c\u7528\uff0c\u5f53\u5927\u4e8e\u7b49\u4e8emin.insync.replicas\u6570\u91cf\u7684broker\u6062\u590d\u540e\uff0c\u53ef\u4ee5\u7ee7\u7eed\u53d1\u9001\uff1b<\/li>\n<li>\u5f53retries\u4e0d\u4e3a0\u65f6\uff0c\u6d88\u606f\u6709\u91cd\u590d\u843d\u76d8\uff1b\u5ba2\u6237\u7aef\u6210\u529f\u8fd4\u56de\u7684\u6d88\u606f\u90fd\u6210\u529f\u843d\u76d8\uff0c\u5f02\u5e38\u65f6\u90e8\u5206\u6d88\u606f\u53ef\u4ee5\u843d\u76d8\u3002<\/li>\n<\/ul>\n<p><strong>\u573a\u666f6\uff1a\u6d4b\u8bd5\u5355\u4e2aproducer\u7684\u53d1\u9001\u5ef6\u8fdf\uff0c\u4ee5\u53ca\u7aef\u5230\u7aef\u7684\u5ef6\u8fdf\u3002<\/strong><br \/>\n\u5177\u4f53\u914d\u7f6e\uff1a\uff1a\u4e00\u4e2aproducer\uff1b\u6d88\u606f\u4f53\u5927\u5c0f1KB\uff1b\u53d1\u9001\u65b9\u5f0f\u4e3async\uff1btopic\u526f\u672c\u6570\u4e3a4\uff1bmin.insync.replicas\u8bbe\u7f6e\u4e3a2\uff1backs=-1\uff1bpartition\u6570\u4e3a12\u3002<br \/>\n\u6d4b\u8bd5\u6570\u636e\u53ca\u7ed3\u679c\uff08\u5355\u4f4d\u4e3ams\uff09\uff1a<\/p>\n<table width=\\\"668\\\">\n<thead>\n<tr class=\\\"firstRow\\\">\n<th align=\\\"center\\\">\u53d1\u9001\u7aef(avg)<\/th>\n<th align=\\\"center\\\">\u53d1\u9001\u7aef(min)<\/th>\n<th align=\\\"center\\\">\u53d1\u9001\u7aef(max)<\/th>\n<th align=\\\"center\\\">\u53d1\u9001\u7aef(99%)<\/th>\n<th align=\\\"center\\\">\u53d1\u9001\u7aef(99.99%)<\/th>\n<th align=\\\"center\\\">\u6d88\u8d39\u7aef(avg)<\/th>\n<th align=\\\"center\\\">\u6d88\u8d39\u7aef(min)<\/th>\n<th align=\\\"center\\\">\u6d88\u8d39\u7aef(max)<\/th>\n<th align=\\\"center\\\">\u6d88\u8d39\u7aef(99%)<\/th>\n<th align=\\\"center\\\" width=\\\"47\\\">\u6d88\u8d39\u7aef(99.99%)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>1.715<\/td>\n<td>1<\/td>\n<td>157<\/td>\n<td>3<\/td>\n<td>29<\/td>\n<td>1.646<\/td>\n<td>1<\/td>\n<td>288<\/td>\n<td>4<\/td>\n<td width=\\\"2\\\">72<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><strong>\u5404\u573a\u666f\u6d4b\u8bd5\u603b\u7ed3<\/strong>\uff1a<\/p>\n<ul class=\\\" list-paddingleft-2\\\">\n<li>\u5f53acks=-1\u65f6\uff0cKafka\u53d1\u9001\u7aef\u7684TPS\u53d7\u9650\u4e8etopic\u7684\u526f\u672c\u6570\u91cf\uff08ISR\u4e2d\uff09\uff0c\u526f\u672c\u8d8a\u591aTPS\u8d8a\u4f4e\uff1b<\/li>\n<li>acks=0\u65f6\uff0cTPS\u6700\u9ad8\uff0c\u5176\u6b21\u4e3a1\uff0c\u6700\u5dee\u4e3a-1\uff0c\u5373TPS\uff1aacks_0 &gt; acks_1 &gt; ack_-1\uff1b<\/li>\n<li>min.insync.replicas\u53c2\u6570\u4e0d\u5f71\u54cdTPS\uff1b<\/li>\n<li>partition\u7684\u4e0d\u540c\u4f1a\u5f71\u54cdTPS\uff0c\u968f\u7740partition\u7684\u4e2a\u6570\u7684\u589e\u957fTPS\u4f1a\u6709\u6240\u589e\u957f\uff0c\u4f46\u5e76\u4e0d\u662f\u4e00\u76f4\u6210\u6b63\u6bd4\u5173\u7cfb\uff0c\u5230\u8fbe\u4e00\u5b9a\u4e34\u754c\u503c\u65f6\uff0cpartition\u6570\u91cf\u7684\u589e\u52a0\u53cd\u800c\u4f1a\u4f7fTPS\u7565\u5fae\u964d\u4f4e\uff1b<\/li>\n<li>Kafka\u5728acks=-1,min.insync.replicas&gt;=1\u65f6\uff0c\u5177\u6709\u9ad8\u53ef\u9760\u6027\uff0c\u6240\u6709\u6210\u529f\u8fd4\u56de\u7684\u6d88\u606f\u90fd\u53ef\u4ee5\u843d\u76d8\u3002<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>1 \u6982\u8ff0 \u00a0\u00a0 Kafka\u4e0e\u4f20\u7edf\u6d88\u606f\u7cfb\u7edf\u76f8\u6bd4\uff0c\u6709\u4ee5\u4e0b\u4e0d\u540c\uff1a \u5b83\u88ab\u8bbe\u8ba1\u4e3a\u4e00\u4e2a\u5206\u5e03\u5f0f\u7cfb\u7edf\uff0c\u6613\u4e8e\u5411\u5916\u6269\u5c55\uff1b \u5b83\u540c\u65f6\u4e3a &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"http:\/\/www.weijing.co\/?p=1534\"> <span class=\"screen-reader-text\">Kafka\u9ad8\u53ef\u7528\u5b9e\u73b0\u539f\u7406<\/span> \u67e5\u770b\u5168\u6587 &raquo;<\/a><\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":""},"categories":[127,118],"tags":[],"uagb_featured_image_src":{"full":false,"thumbnail":false,"medium":false,"medium_large":false,"large":false,"1536x1536":false,"2048x2048":false,"mailpoet_newsletter_max":false,"woocommerce_thumbnail":false,"woocommerce_single":false,"woocommerce_gallery_thumbnail":false,"shop_catalog":false,"shop_single":false,"shop_thumbnail":false},"uagb_author_info":{"display_name":"weijing","author_link":"http:\/\/www.weijing.co\/?author=4"},"uagb_comment_info":0,"uagb_excerpt":"1 \u6982\u8ff0 \u00a0\u00a0 Kafka\u4e0e\u4f20\u7edf\u6d88\u606f\u7cfb\u7edf\u76f8\u6bd4\uff0c\u6709\u4ee5\u4e0b\u4e0d\u540c\uff1a \u5b83\u88ab\u8bbe\u8ba1\u4e3a\u4e00\u4e2a\u5206\u5e03\u5f0f\u7cfb\u7edf\uff0c\u6613\u4e8e\u5411\u5916\u6269\u5c55\uff1b \u5b83\u540c\u65f6\u4e3a&hellip;","_links":{"self":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/posts\/1534"}],"collection":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1534"}],"version-history":[{"count":0,"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/posts\/1534\/revisions"}],"wp:attachment":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1534"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1534"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1534"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}