{"id":1770,"date":"2020-07-01T04:39:22","date_gmt":"2020-06-30T20:39:22","guid":{"rendered":"http:\/\/39.97.231.10\/?p=1770"},"modified":"2020-07-01T04:39:22","modified_gmt":"2020-06-30T20:39:22","slug":"kafak%e8%ae%be%e8%ae%a1%e5%8e%9f%e7%90%86","status":"publish","type":"post","link":"http:\/\/www.weijing.co\/?p=1770","title":{"rendered":"Kafak\u8bbe\u8ba1\u539f\u7406"},"content":{"rendered":"<div>\n<div>\n\u4e00\u3001Kafka\u7b80\u4ecb<br \/>\nKafka\u662f\u4e00\u79cd\u9ad8\u541e\u5410\u91cf\u3001\u5206\u5e03\u5f0f\u3001\u57fa\u4e8e\u53d1\u5e03\/\u8ba2\u9605\u7684\u6d88\u606f\u7cfb\u7edf\uff0c\u6700\u521d\u7531LinkedIn\u516c\u53f8\u5f00\u53d1\uff0c\u4f7f\u7528Scala\u8bed\u8a00\u7f16\u5199\uff0c\u76ee\u524d\u662fApache\u7684\u5f00\u6e90\u9879\u76ee\u3002<br 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data-original-src=\\\"\/\/upload-images.jianshu.io\/upload_images\/4556922-e47f778bb0650b8c.png\\\" data-original-width=\\\"353\\\" data-original-height=\\\"234\\\" data-original-format=\\\"image\/png\\\" data-original-filesize=\\\"53705\\\" data-image-index=\\\"1\\\" \/><\/div>\n<\/div>\n<div><\/div>\n<\/div>\n<p>\u7d22\u5f15\u6587\u4ef6\u4e2d\u5305\u542b\u82e5\u5e72\u4e2a\u7d22\u5f15\u6761\u76ee\uff0c\u6bcf\u4e2a\u6761\u76ee\u8868\u793a\u6570\u636e\u6587\u4ef6\u4e2d\u4e00\u6761Message\u7684\u7d22\u5f15\u3002\u7d22\u5f15\u5305\u542b\u4e24\u4e2a\u90e8\u5206\uff0c\u5206\u522b\u4e3a\u76f8\u5bf9offset\u548cposition\u3002<br 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src=\\\"\/\/upload-images.jianshu.io\/upload_images\/4556922-5f7e057bde157e87.png?imageMogr2\/auto-orient\/strip|imageView2\/2\/w\/663\/format\/webp\\\" data-original-src=\\\"\/\/upload-images.jianshu.io\/upload_images\/4556922-5f7e057bde157e87.png\\\" data-original-width=\\\"663\\\" data-original-height=\\\"370\\\" data-original-format=\\\"image\/png\\\" data-original-filesize=\\\"168106\\\" data-image-index=\\\"2\\\" \/><\/div>\n<\/div>\n<div><\/div>\n<\/div>\n<p>\u603b\u7ed3<br 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\/>\n\u7531\u4e8e\u6d88\u606f\u5728partition\u7684segment\u6570\u636e\u6587\u4ef6\u4e2d\u662f\u987a\u5e8f\u8bfb\u5199\u7684\uff0c\u4e14\u6d88\u606f\u6d88\u8d39\u540e\u4e0d\u4f1a\u5220\u9664\uff08\u5220\u9664\u7b56\u7565\u662f\u9488\u5bf9\u8fc7\u671f\u7684segment\u6587\u4ef6\uff09\uff0c\u8fd9\u79cd\u987a\u5e8f\u78c1\u76d8IO\u5b58\u50a8\u8bbe\u8ba1\u662fKafka\u9ad8\u6027\u80fd\u5f88\u91cd\u8981\u7684\u539f\u56e0\u3002<br \/>\n3.2 \u751f\u4ea7\u8005\u8bbe\u8ba1<\/p>\n<div>\n<div>\n<div><\/div>\n<div data-width=\\\"825\\\" data-height=\\\"408\\\"><img src=\\\"\/\/upload-images.jianshu.io\/upload_images\/4556922-288726ae0822fb28.png?imageMogr2\/auto-orient\/strip|imageView2\/2\/w\/825\/format\/webp\\\" data-original-src=\\\"\/\/upload-images.jianshu.io\/upload_images\/4556922-288726ae0822fb28.png\\\" data-original-width=\\\"825\\\" data-original-height=\\\"408\\\" data-original-format=\\\"image\/png\\\" data-original-filesize=\\\"84093\\\" data-image-index=\\\"3\\\" \/><\/div>\n<\/div>\n<div><\/div>\n<\/div>\n<p>\u8d1f\u8f7d\u5747\u8861\uff1a\u7531\u4e8e\u6d88\u606ftopic\u7531\u591a\u4e2apartition\u7ec4\u6210\uff0c\u4e14partition\u4f1a\u5747\u8861\u5206\u5e03\u5230\u4e0d\u540cbroker\u4e0a\uff0c\u56e0\u6b64\uff0c\u4e3a\u4e86\u6709\u6548\u5229\u7528broker\u96c6\u7fa4\u7684\u6027\u80fd\uff0c\u63d0\u9ad8\u6d88\u606f\u7684\u541e\u5410\u91cf\uff0cproducer\u53ef\u4ee5\u901a\u8fc7\u968f\u673a\u6216\u8005hash\u7b49\u65b9\u5f0f\uff0c\u5c06\u6d88\u606f\u5e73\u5747\u53d1\u9001\u5230\u591a\u4e2apartition\u4e0a\uff0c\u4ee5\u5b9e\u73b0\u8d1f\u8f7d\u5747\u8861\u3002<br \/>\n\u6279\u91cf\u53d1\u9001\uff1a\u662f\u63d0\u9ad8\u6d88\u606f\u541e\u5410\u91cf\u91cd\u8981\u7684\u65b9\u5f0f\uff0cProducer\u7aef\u53ef\u4ee5\u5728\u5185\u5b58\u4e2d\u5408\u5e76\u591a\u6761\u6d88\u606f\u540e\uff0c\u4ee5\u4e00\u6b21\u8bf7\u6c42\u7684\u65b9\u5f0f\u53d1\u9001\u4e86\u6279\u91cf\u7684\u6d88\u606f\u7ed9broker\uff0c\u4ece\u800c\u5927\u5927\u51cf\u5c11broker\u5b58\u50a8\u6d88\u606f\u7684IO\u64cd\u4f5c\u6b21\u6570\u3002\u4f46\u4e5f\u4e00\u5b9a\u7a0b\u5ea6\u4e0a\u5f71\u54cd\u4e86\u6d88\u606f\u7684\u5b9e\u65f6\u6027\uff0c\u76f8\u5f53\u4e8e\u4ee5\u65f6\u5ef6\u4ee3\u4ef7\uff0c\u6362\u53d6\u66f4\u597d\u7684\u541e\u5410\u91cf\u3002<br \/>\n3.3 \u6d88\u8d39\u8005\u8bbe\u8ba1<\/p>\n<div>\n<div>\n<div><\/div>\n<div data-width=\\\"829\\\" data-height=\\\"516\\\"><img src=\\\"\/\/upload-images.jianshu.io\/upload_images\/4556922-3a62a2fdf8166671.png?imageMogr2\/auto-orient\/strip|imageView2\/2\/w\/829\/format\/webp\\\" data-original-src=\\\"\/\/upload-images.jianshu.io\/upload_images\/4556922-3a62a2fdf8166671.png\\\" data-original-width=\\\"829\\\" data-original-height=\\\"516\\\" data-original-format=\\\"image\/png\\\" data-original-filesize=\\\"102900\\\" data-image-index=\\\"4\\\" \/><\/div>\n<\/div>\n<div><\/div>\n<\/div>\n<p>\u4efb\u4f55Consumer\u5fc5\u987b\u5c5e\u4e8e\u4e00\u4e2aConsumer Group<br \/>\n\u540c\u4e00Consumer Group\u4e2d\u7684\u591a\u4e2aConsumer\u5b9e\u4f8b\uff0c\u4e0d\u540c\u65f6\u6d88\u8d39\u540c\u4e00\u4e2apartition\uff0c\u7b49\u6548\u4e8e\u961f\u5217\u6a21\u5f0f\u3002\u5982\u56fe\uff0cConsumer Group 1\u7684\u4e09\u4e2aConsumer\u5b9e\u4f8b\u5206\u522b\u6d88\u8d39\u4e0d\u540c\u7684partition\u7684\u6d88\u606f\uff0c\u5373\uff0cTopicA-part0\u3001TopicA-part1\u3001TopicA-part2\u3002<br \/>\n\u4e0d\u540cConsumer Group\u7684Consumer\u5b9e\u4f8b\u53ef\u4ee5\u540c\u65f6\u6d88\u8d39\u540c\u4e00\u4e2apartition\uff0c\u7b49\u6548\u4e8e\u53d1\u5e03\u8ba2\u9605\u6a21\u5f0f\u3002\u5982\u56fe\uff0cConsumer Group 1\u7684Consumer1\u548cConsumer Group 2\u7684Consumer4\uff0c\u540c\u65f6\u6d88\u8d39TopicA-part0\u7684\u6d88\u606f\u3002<br \/>\npartition\u5185\u6d88\u606f\u662f\u6709\u5e8f\u7684\uff0cConsumer\u901a\u8fc7pull\u65b9\u5f0f\u6d88\u8d39\u6d88\u606f\u3002<br \/>\nKafka\u4e0d\u5220\u9664\u5df2\u6d88\u8d39\u7684\u6d88\u606f<br \/>\n\u961f\u5217\u6a21\u5f0f<br \/>\n\u961f\u5217\u6a21\u5f0f\uff0c\u6307\u6bcf\u6761\u6d88\u606f\u53ea\u4f1a\u6709\u4e00\u4e2aConsumer\u6d88\u8d39\u5230\u3002Kafka\u4fdd\u8bc1\u540c\u4e00Consumer Group\u4e2d\u53ea\u6709\u4e00\u4e2aConsumer\u4f1a\u6d88\u8d39\u67d0\u6761\u6d88\u606f\u3002<br \/>\n\u5728Consumer Group\u7a33\u5b9a\u72b6\u6001\u4e0b\uff0c\u6bcf\u4e00\u4e2aConsumer\u5b9e\u4f8b\u53ea\u4f1a\u6d88\u8d39\u67d0\u4e00\u4e2a\u6216\u591a\u4e2a\u7279\u5b9apartition\u7684\u6570\u636e\uff0c\u800c\u67d0\u4e2apartition\u7684\u6570\u636e\u53ea\u4f1a\u88ab\u67d0\u4e00\u4e2a\u7279\u5b9a\u7684Consumer\u5b9e\u4f8b\u6240\u6d88\u8d39\uff0c\u4e5f\u5c31\u662f\u8bf4Kafka\u5bf9\u6d88\u606f\u7684\u5206\u914d\u662f\u4ee5partition\u4e3a\u5355\u4f4d\u5206\u914d\u7684\uff0c\u800c\u975e\u4ee5\u6bcf\u4e00\u6761\u6d88\u606f\u4f5c\u4e3a\u5206\u914d\u5355\u5143\uff1b<br \/>\n\u540c\u4e00Consumer Group\u4e2d\uff0c\u5982\u679cConsumer\u5b9e\u4f8b\u6570\u91cf\u5c11\u4e8epartition\u6570\u91cf\uff0c\u5219\u81f3\u5c11\u6709\u4e00\u4e2aConsumer\u4f1a\u6d88\u8d39\u591a\u4e2apartition\u7684\u6570\u636e\uff1b\u5982\u679cConsumer\u7684\u6570\u91cf\u4e0epartition\u6570\u91cf\u76f8\u540c\uff0c\u5219\u6b63\u597d\u4e00\u4e2aConsumer\u6d88\u8d39\u4e00\u4e2apartition\u7684\u6570\u636e\uff1b\u800c\u5982\u679cConsumer\u7684\u6570\u91cf\u591a\u4e8epartition\u7684\u6570\u91cf\u65f6\uff0c\u4f1a\u6709\u90e8\u5206Consumer\u65e0\u6cd5\u6d88\u8d39\u8be5Topic\u4e0b\u4efb\u4f55\u4e00\u6761\u6d88\u606f\uff1b<br \/>\n\u8bbe\u8ba1\u7684\u4f18\u52bf\u662f\uff1a\u6bcf\u4e2aConsumer\u4e0d\u7528\u90fd\u8ddf\u5927\u91cf\u7684broker\u901a\u4fe1\uff0c\u51cf\u5c11\u901a\u4fe1\u5f00\u9500\uff0c\u540c\u65f6\u4e5f\u964d\u4f4e\u4e86\u5206\u914d\u96be\u5ea6\uff0c\u5b9e\u73b0\u4e5f\u66f4\u7b80\u5355\uff1b\u53ef\u4ee5\u4fdd\u8bc1\u6bcf\u4e2apartition\u91cc\u7684\u6570\u636e\u53ef\u4ee5\u88abConsumer\u6709\u5e8f\u6d88\u8d39\u3002<br \/>\n\u8bbe\u8ba1\u7684\u52a3\u52bf\u662f\uff1a\u65e0\u6cd5\u4fdd\u8bc1\u540c\u4e00\u4e2aConsumer Group\u91cc\u7684Consumer\u5747\u5300\u6d88\u8d39\u6570\u636e\uff0c\u4e14\u5728Consumer\u5b9e\u4f8b\u591a\u4e8epartition\u4e2a\u6570\u65f6\u5bfc\u81f4\u6709\u4e9bConsumer\u4f1a\u997f\u6b7b\u3002<br \/>\n\u5982\u679c\u6709partition\u6216\u8005Consumer\u7684\u589e\u51cf\uff0c\u4e3a\u4e86\u4fdd\u8bc1\u5747\u8861\u6d88\u8d39\uff0c\u9700\u8981\u5b9e\u73b0Consumer Rebalance\uff0c\u5206\u914d\u7b97\u6cd5\u5982\u4e0b\uff1a<\/p>\n<div>\n<div>\n<div><\/div>\n<div data-width=\\\"732\\\" data-height=\\\"217\\\"><img src=\\\"\/\/upload-images.jianshu.io\/upload_images\/4556922-35f468ce66af8ee2.png?imageMogr2\/auto-orient\/strip|imageView2\/2\/w\/732\/format\/webp\\\" data-original-src=\\\"\/\/upload-images.jianshu.io\/upload_images\/4556922-35f468ce66af8ee2.png\\\" data-original-width=\\\"732\\\" data-original-height=\\\"217\\\" data-original-format=\\\"image\/png\\\" data-original-filesize=\\\"83857\\\" data-image-index=\\\"5\\\" \/><\/div>\n<\/div>\n<div><\/div>\n<\/div>\n<p>broker\u5bf9Consumer\u8bbe\u8ba1\u539f\u7406\uff1a<br \/>\n\u5bf9\u4e8e\u6bcf\u4e2aConsumer Group\uff0c\u9009\u4e3e\u51fa\u4e00\u4e2aBroker\u4f5c\u4e3aCoordinator\uff080.9\u7248\u672c\u4ee5\u4e0a\uff09\uff0c\u7531\u5b83Watch Zookeeper\uff0c\u4ece\u800c\u76d1\u63a7\u5224\u65ad\u662f\u5426\u6709partition\u6216\u8005Consumer\u7684\u589e\u51cf\uff0c\u7136\u540e\u751f\u6210Rebalance\u547d\u4ee4\uff0c\u6309\u7167\u4ee5\u4e0a\u7b97\u6cd5\u91cd\u65b0\u5206\u914d\u3002<br \/>\n\u5f53Consumer Group\u7b2c\u4e00\u6b21\u88ab\u521d\u59cb\u5316\u65f6\uff0cConsumer\u901a\u5e38\u4f1a\u8bfb\u53d6\u6bcf\u4e2apartition\u7684\u6700\u65e9\u6216\u6700\u8fd1\u7684offset\uff08Zookeeper\u8bb0\u5f55\uff09\uff0c\u7136\u540e\u987a\u5e8f\u5730\u8bfb\u53d6\u6bcf\u4e2apartition log\u7684\u6d88\u606f\uff0c\u5728Consumer\u8bfb\u53d6\u8fc7\u7a0b\u4e2d\uff0c\u5b83\u4f1a\u63d0\u4ea4\u5df2\u7ecf\u6210\u529f\u5904\u7406\u7684\u6d88\u606f\u7684offsets\uff08\u7531Zookeeper\u8bb0\u5f55\uff09\u3002<br \/>\n\u5f53\u4e00\u4e2apartition\u88ab\u91cd\u65b0\u5206\u914d\u7ed9Consumer Group\u4e2d\u7684\u5176\u4ed6Consumer\uff0c\u65b0\u7684Consumer\u6d88\u8d39\u7684\u521d\u59cb\u4f4d\u7f6e\u4f1a\u8bbe\u7f6e\u4e3a(\u539f\u6765Consumer)\u6700\u8fd1\u63d0\u4ea4\u7684offset\u3002<\/p>\n<div>\n<div>\n<div><\/div>\n<div data-width=\\\"640\\\" data-height=\\\"219\\\"><img src=\\\"\/\/upload-images.jianshu.io\/upload_images\/4556922-414aac4b7ab20af7.png?imageMogr2\/auto-orient\/strip|imageView2\/2\/w\/640\/format\/webp\\\" data-original-src=\\\"\/\/upload-images.jianshu.io\/upload_images\/4556922-414aac4b7ab20af7.png\\\" data-original-width=\\\"640\\\" data-original-height=\\\"219\\\" data-original-format=\\\"image\/png\\\" data-original-filesize=\\\"46535\\\" data-image-index=\\\"6\\\" \/><\/div>\n<\/div>\n<div><\/div>\n<\/div>\n<p>\u5982\u56fe\uff0cLast Commited Offset\u6307Consumer\u6700\u8fd1\u4e00\u6b21\u63d0\u4ea4\u7684\u6d88\u8d39\u8bb0\u5f55offset\uff0cCurrent Position\u662f\u5f53\u524d\u6d88\u8d39\u7684\u4f4d\u7f6e\uff0cHigh Watermark\u662f\u6210\u529f\u62f7\u8d1d\u5230log\u7684\u6240\u6709\u526f\u672c\u8282\u70b9\uff08partition\u7684\u6240\u6709ISR\u8282\u70b9\uff0c\u4e0b\u6587\u4ecb\u7ecd\uff09\u7684\u6700\u8fd1\u6d88\u606f\u7684offset\uff0cLog End Offset\u662f\u5199\u5165log\u4e2d\u6700\u540e\u4e00\u6761\u6d88\u606f\u7684offset+1\u3002<br \/>\n\u4eceConsumer\u7684\u89d2\u5ea6\u6765\u770b\uff0c\u6700\u591a\u53ea\u80fd\u8bfb\u53d6\u5230High watermark\u7684\u4f4d\u7f6e\uff0c\u540e\u9762\u7684\u6d88\u606f\u5bf9\u6d88\u8d39\u8005\u4e0d\u53ef\u89c1\uff0c\u56e0\u4e3a\u672a\u5b8c\u5168\u590d\u5236\u7684\u6570\u636e\u8fd8\u6ca1\u53ef\u9760\u5b58\u50a8\uff0c\u6709\u4e22\u5931\u53ef\u80fd\u3002<br \/>\n\u53d1\u5e03\u8ba2\u9605\u6a21\u5f0f<br \/>\n\u53d1\u5e03\u8ba2\u9605\u6a21\u5f0f\uff0c\u53c8\u6307\u5e7f\u64ad\u6a21\u5f0f\uff0cKafka\u4fdd\u8bc1topic\u7684\u6bcf\u6761\u6d88\u606f\u4f1a\u88ab\u6240\u6709Consumer Group\u6d88\u8d39\u5230\uff0c\u800c\u5bf9\u4e8e\u540c\u4e00\u4e2aConsumer Group\uff0c\u8fd8\u662f\u4fdd\u8bc1\u53ea\u6709\u4e00\u4e2aConsumer\u5b9e\u4f8b\u6d88\u8d39\u5230\u8fd9\u6761\u6d88\u606f\u3002<br \/>\n3.4 Replication\u8bbe\u8ba1<br \/>\n\u4f5c\u4e3a\u6d88\u606f\u4e2d\u95f4\u4ef6\uff0c\u6570\u636e\u7684\u53ef\u9760\u6027\u4ee5\u53ca\u7cfb\u7edf\u7684\u53ef\u7528\u6027\uff0c\u5fc5\u7136\u4f9d\u8d56\u6570\u636e\u526f\u672c\u7684\u8bbe\u8ba1\u3002<br \/>\nKafka\u7684replica\u526f\u672c\u5355\u5143\u662ftopic\u7684partition\uff0c\u4e00\u4e2apartition\u7684replica\u6570\u91cf\u4e0d\u80fd\u8d85\u8fc7broker\u7684\u6570\u91cf\uff0c\u56e0\u4e3a\u4e00\u4e2abroker\u6700\u591a\u53ea\u4f1a\u5b58\u50a8\u8fd9\u4e2apartition\u7684\u4e00\u4e2a\u526f\u672c\u3002\u6240\u6709\u6d88\u606f\u751f\u4ea7\u3001\u6d88\u8d39\u8bf7\u6c42\u90fd\u662f\u7531partition\u7684leader replica\u6765\u5904\u7406\uff0c\u5176\u4ed6follower replica\u8d1f\u8d23\u4eceleader\u590d\u5236\u6570\u636e\u8fdb\u884c\u5907\u4efd\u3002<br \/>\nReplica\u5747\u5300\u5206\u5e03\u5230\u6574\u4e2a\u96c6\u7fa4\uff0cReplica\u7684\u7b97\u6cd5\u5982\u4e0b\uff1a<br \/>\n\u5c06\u6240\u6709Broker\uff08\u5047\u8bbe\u5171n\u4e2aBroker\uff09\u548c\u5f85\u5206\u914d\u7684Partition\u6392\u5e8f<br \/>\n\u5c06\u7b2ci\u4e2aPartition\u5206\u914d\u5230\u7b2c\uff08i mod n\uff09\u4e2aBroker\u4e0a<br \/>\n\u5c06\u7b2ci\u4e2aPartition\u7684\u7b2cj\u4e2aReplica\u5206\u914d\u5230\u7b2c\uff08(i + j) mode n\uff09\u4e2aBroker\u4e0a<\/p>\n<div>\n<div>\n<div><\/div>\n<div data-width=\\\"440\\\" data-height=\\\"163\\\"><img src=\\\"\/\/upload-images.jianshu.io\/upload_images\/4556922-93ac2829083b0758.png?imageMogr2\/auto-orient\/strip|imageView2\/2\/w\/440\/format\/webp\\\" data-original-src=\\\"\/\/upload-images.jianshu.io\/upload_images\/4556922-93ac2829083b0758.png\\\" data-original-width=\\\"440\\\" data-original-height=\\\"163\\\" data-original-format=\\\"image\/png\\\" data-original-filesize=\\\"24936\\\" data-image-index=\\\"7\\\" \/><\/div>\n<\/div>\n<div><\/div>\n<\/div>\n<p>\u5982\u56fe\uff0cTopicA\u6709\u4e09\u4e2apartition\uff1apart0\u3001part1\u3001part2\uff0c\u6bcf\u4e2apartition\u7684replica\u6570\u7b49\u4e8e2\uff08\u4e00\u4e2a\u662fleader\uff0c\u53e6\u4e00\u4e2a\u662ffollower\uff09\uff0c\u6309\u7167\u4ee5\u4e0a\u7b97\u6cd5\u4f1a\u5747\u5300\u843d\u5230\u4e09\u4e2abroker\u4e0a\u3002<br \/>\nbroker\u5bf9replica\u7ba1\u7406\uff1a<br \/>\n\u9009\u4e3e\u51fa\u4e00\u4e2abroker\u4f5c\u4e3acontroller\uff0c\u7531\u5b83Watch Zookeeper\uff0c\u8d1f\u8d23partition\u7684replica\u7684\u96c6\u7fa4\u5206\u914d\uff0c\u4ee5\u53caleader\u5207\u6362\u9009\u4e3e\u7b49\u6d41\u7a0b\u3002<br \/>\nIn-Sync-Replica(ISR)<br \/>\n\u5206\u5e03\u5f0f\u7cfb\u7edf\u5728\u5904\u7406\u8282\u70b9\u6545\u969c\u65f6\uff0c\u9700\u8981\u9884\u5148\u660e\u786e\u8282\u70b9\u7684\u201dfailure\u201d\u548c\u201dalive\u201d\u7684\u5b9a\u4e49\u3002\u5bf9\u4e8eKafka\u8282\u70b9\uff0c\u5224\u65ad\u662f\u201dalive\u201d\u6709\u4ee5\u4e0b\u4e24\u4e2a\u6761\u4ef6\uff1a<br \/>\n\u8282\u70b9\u5fc5\u987b\u548cZookeeper\u4fdd\u6301\u5fc3\u8df3\u8fde\u63a5<br \/>\n\u5982\u679c\u8282\u70b9\u662ffollower\uff0c\u5fc5\u987b\u4eceleader\u8282\u70b9\u4e0a\u590d\u5236\u6570\u636e\u6765\u5907\u4efd\uff0c\u800c\u4e14\u5907\u4efd\u7684\u6570\u636e\u76f8\u6bd4leader\u800c\u8a00\uff0c\u4e0d\u80fd\u843d\u540e\u592a\u591a\u3002<br \/>\nKafka\u5c06\u6ee1\u8db3\u4ee5\u4e0a\u6761\u4ef6\u7684replica\u8282\u70b9\u8ba4\u4e3a\u662f\u201din sync\u201d\uff08\u540c\u6b65\u4e2d\uff09\uff0c\u79f0\u4e3aIn-Sync-Replica(ISR)\u3002<br \/>\nKafka\u7684Zookeeper\u7ef4\u62a4\u4e86\u6bcf\u4e2apartition\u7684ISR\u4fe1\u606f\uff0c\u7406\u60f3\u60c5\u51b5\u4e0b\uff0cISR\u5305\u542b\u4e86partition\u7684\u6240\u6709replica\u6240\u5728\u7684broker\u8282\u70b9\u4fe1\u606f\uff0c\u800c\u5f53\u67d0\u4e9b\u8282\u70b9\u4e0d\u6ee1\u8db3\u4ee5\u4e0a\u6761\u4ef6\u65f6\uff0cISR\u53ef\u80fd\u53ea\u5305\u542b\u90e8\u5206replica\u3002\u4f8b\u5982\uff0c\u4e0a\u56fe\u4e2d\u7684TopicA-part0\u7684ISR\u5217\u8868\u53ef\u80fd\u662f[broker1,broker2,broker3]\uff0c\u4e5f\u53ef\u80fd\u662f[broker1,broker3]\u548c[broker1]\u3002<br \/>\n\u6570\u636e\u53ef\u9760\u6027<br \/>\nKafka\u5982\u4f55\u4fdd\u8bc1\u6570\u636e\u53ef\u9760\u6027\uff1f\u9996\u5148\u770b\u4e0b\uff0cProducer\u751f\u4ea7\u4e00\u6761\u6d88\u606f\uff0c\u8be5\u6d88\u606f\u88ab\u8ba4\u4e3a\u662f\u201dcommitted\u201d\uff08\u5373broker\u8ba4\u4e3a\u6d88\u606f\u5df2\u7ecf\u53ef\u9760\u5b58\u50a8\uff09\u7684\u8fc7\u7a0b\uff1a<br \/>\n\u6d88\u606f\u6240\u5728partition\u7684ISR replicas\u4f1a\u5b9a\u65f6\u5f02\u6b65\u4eceleader\u4e0a\u6279\u91cf\u590d\u5236\u6570\u636elog<br \/>\n\u5f53\u6240\u6709ISR replica\u90fd\u8fd4\u56deack\uff0c\u544a\u8bc9leader\u8be5\u6d88\u606f\u5df2\u7ecf\u5199log\u6210\u529f\u540e\uff0cleader\u8ba4\u4e3a\u8be5\u6d88\u606fcommitted\uff0c\u5e76\u544a\u8bc9Producer\u751f\u4ea7\u6210\u529f\u3002\u8fd9\u91cc\u548c\u4ee5\u4e0a\u201dalive\u201d\u6761\u4ef6\u7684\u7b2c\u4e8c\u70b9\u662f\u4e0d\u77db\u76fe\u7684\uff0c\u56e0\u4e3aleader\u6709\u8d85\u65f6\u673a\u5236\uff0cleader\u7b49ISR\u7684follower\u590d\u5236\u6570\u636e\uff0c\u5982\u679c\u4e00\u5b9a\u65f6\u95f4\u4e0d\u8fd4\u56deack\uff08\u53ef\u80fd\u6570\u636e\u590d\u5236\u8fdb\u5ea6\u843d\u540e\u592a\u591a\uff09\uff0c\u5219leader\u5c06\u8be5follower replica\u4eceISR\u4e2d\u5254\u9664\u3002<br \/>\n\u6d88\u606fcommitted\u4e4b\u540e\uff0cConsumer\u624d\u80fd\u6d88\u8d39\u5230\u3002<\/p>\n<div>\n<div>\n<div><\/div>\n<div data-width=\\\"318\\\" data-height=\\\"297\\\"><img src=\\\"\/\/upload-images.jianshu.io\/upload_images\/4556922-214f770afd90e5d1.png?imageMogr2\/auto-orient\/strip|imageView2\/2\/w\/318\/format\/webp\\\" data-original-src=\\\"\/\/upload-images.jianshu.io\/upload_images\/4556922-214f770afd90e5d1.png\\\" data-original-width=\\\"318\\\" data-original-height=\\\"297\\\" data-original-format=\\\"image\/png\\\" data-original-filesize=\\\"16202\\\" data-image-index=\\\"8\\\" \/><\/div>\n<\/div>\n<div><\/div>\n<\/div>\n<div>\n<div>\n<div><\/div>\n<div data-width=\\\"318\\\" data-height=\\\"201\\\"><img src=\\\"\/\/upload-images.jianshu.io\/upload_images\/4556922-e020ea0a7d820b04.png?imageMogr2\/auto-orient\/strip|imageView2\/2\/w\/318\/format\/webp\\\" data-original-src=\\\"\/\/upload-images.jianshu.io\/upload_images\/4556922-e020ea0a7d820b04.png\\\" data-original-width=\\\"318\\\" data-original-height=\\\"201\\\" data-original-format=\\\"image\/png\\\" data-original-filesize=\\\"11810\\\" data-image-index=\\\"9\\\" \/><\/div>\n<\/div>\n<div><\/div>\n<\/div>\n<div>\n<div>\n<div><\/div>\n<div data-width=\\\"326\\\" data-height=\\\"179\\\"><img src=\\\"\/\/upload-images.jianshu.io\/upload_images\/4556922-ff270e8711ba360f.png?imageMogr2\/auto-orient\/strip|imageView2\/2\/w\/326\/format\/webp\\\" data-original-src=\\\"\/\/upload-images.jianshu.io\/upload_images\/4556922-ff270e8711ba360f.png\\\" data-original-width=\\\"326\\\" data-original-height=\\\"179\\\" data-original-format=\\\"image\/png\\\" data-original-filesize=\\\"9036\\\" data-image-index=\\\"10\\\" \/><\/div>\n<\/div>\n<div><\/div>\n<\/div>\n<p>ISR\u673a\u5236\u4e0b\u7684\u6570\u636e\u590d\u5236\uff0c\u65e2\u4e0d\u662f\u5b8c\u5168\u7684\u540c\u6b65\u590d\u5236\uff0c\u4e5f\u4e0d\u662f\u5355\u7eaf\u7684\u5f02\u6b65\u590d\u5236\uff0c\u8fd9\u662fKafka\u9ad8\u541e\u5410\u5f88\u91cd\u8981\u7684\u673a\u5236\u3002\u540c\u6b65\u590d\u5236\u8981\u6c42\u6240\u6709\u80fd\u5de5\u4f5c\u7684follower\u90fd\u590d\u5236\u5b8c\uff0c\u8fd9\u6761\u6d88\u606f\u624d\u4f1a\u88ab\u8ba4\u4e3acommitted\uff0c\u8fd9\u79cd\u590d\u5236\u65b9\u5f0f\u6781\u5927\u7684\u5f71\u54cd\u4e86\u541e\u5410\u91cf\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\u7ecfcommitted\uff0c\u8fd9\u79cd\u60c5\u51b5\u4e0b\u5982\u679cfollower\u90fd\u590d\u5236\u5b8c\u90fd\u843d\u540e\u4e8eleader\uff0c\u800c\u5982\u679cleader\u7a81\u7136\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\u91cf\uff0cfollower\u53ef\u4ee5\u6279\u91cf\u7684\u4eceleader\u590d\u5236\u6570\u636e\uff0c\u6570\u636e\u590d\u5236\u5230\u5185\u5b58\u5373\u8fd4\u56deack\uff0c\u8fd9\u6837\u6781\u5927\u7684\u63d0\u9ad8\u590d\u5236\u6027\u80fd\uff0c\u5f53\u7136\u6570\u636e\u4ecd\u7136\u662f\u6709\u4e22\u5931\u98ce\u9669\u7684\u3002<br \/>\nKafka\u672c\u8eab\u5b9a\u4f4d\u4e8e\u9ad8\u6027\u80fd\u7684MQ\uff0c\u66f4\u591a\u6ce8\u91cd\u6d88\u606f\u541e\u5410\u91cf\uff0c\u5728\u6b64\u57fa\u7840\u4e0a\u7ed3\u5408ISR\u7684\u673a\u5236\u53bb\u5c3d\u91cf\u4fdd\u8bc1\u6d88\u606f\u7684\u53ef\u9760\u6027\uff0c\u4f46\u4e0d\u662f\u7edd\u5bf9\u53ef\u9760\u7684\u3002<br \/>\n\u670d\u52a1\u53ef\u7528\u6027<br \/>\nKafka\u6240\u6709\u6536\u53d1\u6d88\u606f\u8bf7\u6c42\u90fd\u7531leader\u8282\u70b9\u5904\u7406\uff0c\u7531\u4ee5\u4e0a\u6570\u636e\u53ef\u9760\u6027\u8bbe\u8ba1\u53ef\u77e5\uff0c\u5f53ISR\u7684follower replica\u6545\u969c\u540e\uff0cleader\u4f1a\u53ca\u65f6\u5730\u4eceISR\u5217\u8868\u4e2d\u628a\u5b83\u5254\u9664\u6389\uff0c\u5e76\u4e0d\u5f71\u54cd\u670d\u52a1\u53ef\u7528\u6027\uff0c\u90a3\u4e48\u5f53leader\u6545\u969c\u540e\u4f1a\u600e\u6837\u5462\uff1f\u5982\u4f55\u9009\u4e3e\u65b0\u7684leader\uff1f<br \/>\nleader\u9009\u4e3e<br \/>\nKafka\u5728Zookeeper\u5b58\u50a8partition\u7684ISR\u4fe1\u606f\uff0c\u5e76\u4e14\u80fd\u52a8\u6001\u8c03\u6574ISR\u5217\u8868\u7684\u6210\u5458\uff0c\u53ea\u6709ISR\u91cc\u7684\u6210\u5458replica\u624d\u4f1a\u88ab\u9009\u4e3aleader\uff0c\u5e76\u4e14ISR\u6240\u6709\u7684replica\u90fd\u6709\u53ef\u80fd\u6210\u4e3aleader\uff1b<br \/>\nleader\u8282\u70b9\u5b95\u673a\u540e\uff0cZookeeper\u80fd\u76d1\u63a7\u53d1\u73b0\uff0c\u5e76\u7531broker\u7684controller\u8282\u70b9\u4eceISR\u4e2d\u9009\u4e3e\u51fa\u65b0\u7684leader\uff0c\u5e76\u901a\u77e5ISR\u5185\u7684\u6240\u6709broker\u8282\u70b9\u3002<\/p>\n<div>\n<div>\n<div><\/div>\n<div data-width=\\\"343\\\" data-height=\\\"176\\\"><img src=\\\"\/\/upload-images.jianshu.io\/upload_images\/4556922-1abbeee5dab12758.png?imageMogr2\/auto-orient\/strip|imageView2\/2\/w\/343\/format\/webp\\\" data-original-src=\\\"\/\/upload-images.jianshu.io\/upload_images\/4556922-1abbeee5dab12758.png\\\" data-original-width=\\\"343\\\" data-original-height=\\\"176\\\" data-original-format=\\\"image\/png\\\" data-original-filesize=\\\"10627\\\" data-image-index=\\\"11\\\" \/><\/div>\n<\/div>\n<div><\/div>\n<\/div>\n<p>\u56e0\u6b64\uff0c\u53ef\u4ee5\u770b\u51fa\uff0c\u53ea\u8981ISR\u4e2d\u81f3\u5c11\u6709\u4e00\u4e2areplica\uff0cKafka\u5c31\u80fd\u4fdd\u8bc1\u670d\u52a1\u7684\u53ef\u7528\u6027\uff08\u4f46\u4e0d\u4fdd\u8bc1\u7f51\u7edc\u5206\u533a\u4e0b\u7684\u53ef\u7528\u6027\uff09\u3002<br \/>\n\u5bb9\u707e\u548c\u6570\u636e\u4e00\u81f4\u6027<br \/>\n\u5206\u5e03\u5f0f\u7cfb\u7edf\u7684\u5bb9\u707e\u80fd\u529b\uff0c\u8ddf\u5176\u672c\u8eab\u9488\u5bf9\u6570\u636e\u4e00\u81f4\u6027\u8003\u8651\u6240\u9009\u62e9\u7684\u7b97\u6cd5\u6709\u5173\uff0c\u4f8b\u5982\uff0cZookeeper\u7684Zab\u7b97\u6cd5\uff0craft\u7b97\u6cd5\u7b49\u3002Kafka\u7684ISR\u673a\u5236\u548c\u8fd9\u4e9bMajority Vote\u7b97\u6cd5\u5bf9\u6bd4\u5982\u4e0b\uff1a<br \/>\nISR\u673a\u5236\u80fd\u5bb9\u5fcd\u66f4\u591a\u7684\u8282\u70b9\u5931\u8d25\u3002\u5047\u5982replica\u8282\u70b9\u67092f+1\u4e2a\uff0c\u6bcf\u4e2apartition\u6700\u591a\u80fd\u5bb9\u5fcd2f\u4e2a\u5931\u8d25\uff0c\u4e14\u4e0d\u4e22\u5931\u6d88\u606f\u6570\u636e\uff1b\u4f46\u76f8\u5bf9Majority Vote\u9009\u4e3e\u7b97\u6cd5\uff0c\u53ea\u80fd\u6700\u591a\u5bb9\u5fcdf\u4e2a\u5931\u8d25\u3002<br \/>\n\u5728\u6d88\u606fcommitted\u6301\u4e45\u5316\u4e0a\uff0cISR\u9700\u8981\u7b492f\u4e2a\u8282\u70b9\u8fd4\u56deack\uff0c\u4f46Majority Vote\u53ea\u9700\u7b49f+1\u4e2a\u8282\u70b9\u8fd4\u56deack\uff0c\u4e14\u4e0d\u4f9d\u8d56\u5904\u7406\u6700\u6162\u7684follower\u8282\u70b9\uff0c\u56e0\u6b64Majority Vote\u6709\u4f18\u52bf<br \/>\nISR\u673a\u5236\u80fd\u8282\u7701\u66f4\u591areplica\u8282\u70b9\u6570\u3002\u4f8b\u5982\uff0c\u8981\u4fdd\u8bc1f\u4e2a\u8282\u70b9\u53ef\u7528\uff0cISR\u65b9\u5f0f\u81f3\u5c11\u8981f\u4e2a\u8282\u70b9\uff0c\u800cMajority Vote\u81f3\u5c11\u9700\u89812f+1\u4e2a\u8282\u70b9\u3002<br \/>\n\u5982\u679c\u6240\u6709replica\u90fd\u5b95\u673a\u4e86\uff0c\u6709\u4e24\u79cd\u65b9\u5f0f\u6062\u590d\u670d\u52a1\uff1a<br \/>\n\u7b49ISR\u4efb\u4e00\u8282\u70b9\u6062\u590d\uff0c\u5e76\u9009\u4e3e\u4e3aleader\uff1b<br \/>\n\u9009\u62e9\u7b2c\u4e00\u4e2a\u6062\u590d\u7684\u8282\u70b9\uff08\u4e0d\u4e00\u5b9a\u662fISR\u4e2d\u7684\u8282\u70b9\uff09\u4e3aleader<br \/>\n\u7b2c\u4e00\u79cd\u65b9\u5f0f\u6d88\u606f\u4e0d\u4f1a\u4e22\u5931\uff08\u53ea\u80fd\u8bf4\u8fd9\u79cd\u65b9\u5f0f\u6700\u6709\u53ef\u80fd\u4e0d\u4e22\u800c\u5df2\uff09\uff0c\u7b2c\u4e8c\u79cd\u65b9\u5f0f\u53ef\u80fd\u4f1a\u4e22\u6d88\u606f\uff0c\u4f46\u80fd\u5c3d\u5feb\u6062\u590d\u670d\u52a1\u53ef\u7528\u3002\u8fd9\u662f\u53ef\u7528\u6027\u548c\u4e00\u81f4\u6027\u573a\u666f\u7684\u4e24\u79cd\u8003\u8651\uff0cKafka\u9ed8\u8ba4\u9009\u62e9\u7b2c\u4e8c\u79cd\uff0c\u7528\u6237\u4e5f\u53ef\u4ee5\u81ea\u4e3b\u914d\u7f6e\u3002<br \/>\n\u5927\u90e8\u5206\u8003\u8651CP\u7684\u5206\u5e03\u5f0f\u7cfb\u7edf\uff08\u5047\u8bbe2f+1\u4e2a\u8282\u70b9\uff09\uff0c\u4e3a\u4e86\u4fdd\u8bc1\u6570\u636e\u4e00\u81f4\u6027\uff0c\u6700\u591a\u53ea\u80fd\u5bb9\u5fcdf\u4e2a\u8282\u70b9\u7684\u5931\u8d25\uff0c\u800cKafka\u4e3a\u4e86\u517c\u987e\u53ef\u7528\u6027\uff0c\u5141\u8bb8\u6700\u591a2f\u4e2a\u8282\u70b9\u5931\u8d25\uff0c\u56e0\u6b64\u662f\u65e0\u6cd5\u4fdd\u8bc1\u6570\u636e\u5f3a\u4e00\u81f4\u7684\u3002<\/p>\n<div>\n<div>\n<div><\/div>\n<div data-width=\\\"331\\\" data-height=\\\"333\\\"><img src=\\\"\/\/upload-images.jianshu.io\/upload_images\/4556922-30253f3a0d93f3c1.png?imageMogr2\/auto-orient\/strip|imageView2\/2\/w\/331\/format\/webp\\\" data-original-src=\\\"\/\/upload-images.jianshu.io\/upload_images\/4556922-30253f3a0d93f3c1.png\\\" data-original-width=\\\"331\\\" data-original-height=\\\"333\\\" data-original-format=\\\"image\/png\\\" data-original-filesize=\\\"23862\\\" data-image-index=\\\"12\\\" \/><\/div>\n<\/div>\n<div><\/div>\n<\/div>\n<p>\u5982\u56fe\u6240\u793a\uff0c\u4e00\u5f00\u59cbISR\u6570\u91cf\u7b49\u4e8e3\uff0c\u6b63\u5e38\u540c\u6b65\u6570\u636e\uff0c\u7ea2\u8272\u90e8\u5206\u5f00\u59cb\uff0cleader\u53d1\u73b0\u5176\u4ed6\u4e24\u4e2afollower\u590d\u5236\u8fdb\u5ea6\u592a\u6162\u6216\u8005\u5176\u4ed6\u539f\u56e0\uff08\u7f51\u7edc\u5206\u533a\u3001\u8282\u70b9\u6545\u969c\u7b49\uff09\uff0c\u5c06\u5176\u4eceISR\u5254\u9664\u540e\uff0cleader\u5355\u8282\u70b9\u5b58\u50a8\u6570\u636e\uff1b\u7136\u540e\uff0cleader\u5b95\u673a\uff0c\u89e6\u53d1\u91cd\u65b0\u9009\u4e3e\u7b2c\u4e8c\u8282\u70b9\u4e3aleader\uff0c\u91cd\u65b0\u5f00\u59cb\u540c\u6b65\u6570\u636e\uff0c\u4f46\u7ea2\u8272\u90e8\u5206\u7684\u6570\u636e\u5728\u65b0leader\u4e0a\u662f\u6ca1\u6709\u7684\uff1b\u6700\u540e\u539fleader\u8282\u70b9\u6062\u590d\u670d\u52a1\u540e\uff0c\u91cd\u65b0\u4ece\u65b0leader\u4e0a\u590d\u5236\u6570\u636e\uff0c\u800c\u7ea2\u8272\u90e8\u5206\u7684\u6570\u636e\u5df2\u7ecf\u6d88\u8d39\u4e0d\u5230\u4e86\u3002<br \/>\n\u56e0\u6b64\uff0c\u4e3a\u4e86\u51cf\u5c11\u6570\u636e\u4e22\u5931\u7684\u6982\u7387\uff0c\u53ef\u4ee5\u8bbe\u7f6eKafka\u7684ISR\u6700\u5c0freplica\u6570\uff0c\u4f4e\u4e8e\u8be5\u503c\u540e\u76f4\u63a5\u8fd4\u56de\u4e0d\u53ef\u7528\uff0c\u5f53\u7136\u662f\u4ee5\u727a\u7272\u4e00\u5b9a\u53ef\u7528\u6027\u548c\u541e\u5410\u91cf\u4e3a\u524d\u63d0\u4e86\u3002<br \/>\n\u91cd\u590d\u6d88\u606f<br \/>\n\u6d88\u606f\u4f20\u8f93\u6709\u4e09\u79cd\u65b9\u5f0f\uff1a<br \/>\nAt most once\uff1a\u6d88\u606f\u53ef\u80fd\u4f1a\u4e22\u5931\uff0c\u4f46\u4e0d\u4f1a\u91cd\u590d\u4f20\u8f93<br \/>\nAt least once\uff1a\u6d88\u606f\u4e0d\u4f1a\u4e22\u5931\uff0c\u4f46\u53ef\u80fd\u91cd\u590d\u4f20\u8f93<br \/>\nExactly once\uff1a\u6d88\u606f\u4fdd\u8bc1\u4f1a\u88ab\u4f20\u8f93\u4e00\u6b21\u4e14\u4ec5\u4f20\u8f93\u4e00\u6b21<br \/>\nKafka\u5b9e\u73b0\u4e86\u7b2c\u4e8c\u79cd\u65b9\u5f0f\uff0c\u5373\uff0c\u53ef\u80fd\u5b58\u5728\u91cd\u590d\u6d88\u606f\uff0c\u9700\u8981\u4e1a\u52a1\u81ea\u5df1\u4fdd\u8bc1\u6d88\u606f\u5e42\u7b49\u6027\u5904\u7406\u3002<br \/>\n3.5 \u9ad8\u541e\u5410\u8bbe\u8ba1<br \/>\n\u5bf9\u4e8epartition\uff0c\u987a\u5e8f\u8bfb\u5199\u78c1\u76d8\u6570\u636e\uff0c\u4ee5\u65f6\u95f4\u590d\u6742\u5ea6O(1)\u65b9\u5f0f\u63d0\u4f9b\u6d88\u606f\u6301\u4e45\u5316\u80fd\u529b\u3002<br \/>\nProducer\u6279\u91cf\u5411broker\u5199\u6570\u636e<br \/>\nConsumer\u6279\u91cf\u4ecebroker\u62c9\u6570\u636e<br \/>\n\u65e5\u5fd7\u538b\u7f29<br \/>\nTopic\u5206\u591a\u4e2apartition\uff0c\u63d0\u9ad8\u5e76\u53d1<br \/>\nbroker\u96f6\u62f7\u8d1d\uff08Zero Copy\uff09\uff0c\u4f7f\u7528sendfile\u7cfb\u7edf\u8c03\u7528\uff0c\u5c06\u6570\u636e\u76f4\u63a5\u4ecepage cache\u53d1\u9001\u5230socket\u4e0a<br \/>\nProducer\u53ef\u914d\u7f6e\u662f\u5426\u7b49\u5f85\u6d88\u606fcommitted\u3002\u5982\u679cProducer\u751f\u4ea7\u6d88\u606f\uff0c\u6bcf\u6b21\u90fd\u5fc5\u987b\u7b49ISR\u5b58\u50a8\u540e\u624d\u8fd4\u56de\uff0c\u65f6\u5ef6\u4f1a\u5f88\u9ad8\uff0c\u8fdb\u800c\u5f71\u54cd\u6574\u4f53\u6d88\u606f\u7684\u541e\u5410\u91cf\u3002\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0c\u4e00\u65b9\u9762Producer\u53ef\u4ee5\u914d\u7f6e\u51cf\u5c11partition\u7684\u526f\u672c\u6570\uff0c\u4f8b\u5982\uff0cISR\u5927\u5c0f\u4e3a1\uff1b\u53e6\u4e00\u65b9\u9762\uff0c\u5728\u4e0d\u592a\u5173\u6ce8\u6d88\u606f\u53ef\u9760\u5b58\u50a8\u7684\u573a\u666f\u4e0b\uff0cProducer\u53ef\u4ee5\u901a\u8fc7\u914d\u7f6e\u9009\u62e9\u662f\u5426\u7b49\u5f85\u6d88\u606fcommitted\uff0c\u5982\u4e0b\uff1a<br \/>\nAcks\u6301\u4e45\u6027\u7b49\u7ea7\u8fd4\u56de\u54cd\u5e94\u65f6\u673a\u5199\u5ef6\u65f6<br \/>\nall\u9ad8\u5168\u90e8ISR\u6210\u5458\u8fd4\u56deACK\u9ad8<br \/>\n1\u4e2dISR\u4e2d\u4efb\u4e00\u6210\u5458\u8fd4\u56deACK\u4e2d<br \/>\n0\u4f4e\u4e0d\u7b49\u5f85ISR\u6210\u5458\u8fd4\u56deACK\u4f4e<br \/>\n\u8fd9\u662f\u7528\u6237\u5728\u6d88\u606f\u541e\u5410\u91cf\u548c\u6301\u4e45\u5316\u4e4b\u95f4\u505a\u7684\u6743\u8861\u9009\u62e9\uff0c\u6301\u4e45\u5316\u7b49\u7ea7\u8d8a\u9ad8\uff0c\u751f\u4ea7\u6d88\u606f\u541e\u5410\u91cf\u8d8a\u5c0f\uff0c\u53cd\u4e4b\uff0c\u6301\u4e45\u5316\u7b49\u7ea7\u8d8a\u4f4e\uff0c\u541e\u5410\u91cf\u8d8a\u9ad8\u3002<br \/>\n3.6 HA\u57fa\u672c\u539f\u7406<br \/>\nbroker HA<br \/>\nbroker\u96c6\u7fa4\u4fe1\u606f\u7531Zookeeper\u7ef4\u62a4\uff0c\u5e76\u9009\u4e3e\u51fa\u4e00\u4e2acontroller\u3002\u6240\u6709partition\u7684leader\u9009\u4e3e\u90fd\u7531controller\u51b3\u5b9a\uff0c\u5c06leader\u7684\u53d8\u66f4\u76f4\u63a5\u901a\u8fc7rpc\u65b9\u5f0f\u901a\u77e5\u9700\u8981\u4e3a\u6b64\u505a\u51fa\u54cd\u5e94\u7684brokers\uff1bcontroller\u4e5f\u8d1f\u8d23\u589e\u5220topic\u4ee5\u53capartition replica\u7684\u91cd\u65b0\u5206\u914d\u3002<br \/>\ncontroller\u5728Zookeeper\u4e0a\u6ce8\u518cwatch\uff0c\u4e00\u65e6\u6709broker\u5b95\u673a\uff0c\u5176\u5bf9\u5e94\u5728Zookeeper\u7684\u4e34\u65f6\u8282\u70b9\u81ea\u52a8\u88ab\u5220\u9664\uff0ccontroller\u5bf9\u5b95\u673abroker\u4e0a\u7684\u6240\u6709partition\u91cd\u65b0\u5206\u914d\u65b0leader\uff1b\u5982\u679ccontroller\u5b95\u673a\uff0c\u5176\u4ed6broker\u901a\u8fc7Zookeeper\u9009\u4e3e\u51fa\u65b0\u7684controller\uff0c\u7136\u540e\u540c\u6837\u5bf9\u5b95\u673abroker\u4e0a\u7684\u6240\u6709partition\u91cd\u65b0\u5206\u914d\u65b0leader\u3002<br \/>\npartition HA<br \/>\npartition leader\u6240\u5728\u7684broker\u5b95\u673a\uff0c\u5982\u4e0a\u6240\u8ff0\uff0cbroker controller\u6839\u636e\u52a8\u6001\u7ef4\u62a4\u7684ISR\uff0c\u4f1a\u91cd\u65b0\u5728\u5269\u4e0b\u7684broker\u673a\u5668\u4e2d\u9009\u51faISR\u91cc\u9762\u7684\u4e00\u4e2a\u6210\u5458\u6210\u4e3a\u65b0\u7684leader\u3002\u5982\u679cISR\u4e2d\u81f3\u5c11\u6709\u4e00\u4e2afollower\uff0c\u5219\u53ef\u4ee5\u786e\u4fdd\u5df2\u7ecfcommitted\u7684\u6570\u636e\u4e0d\u4e22\u5931\uff1b\u5426\u5219\u9009\u62e9\u4efb\u610f\u4e00\u4e2areplica\u4f5c\u4e3aleader\uff0c\u8be5\u573a\u666f\u53ef\u80fd\u4f1a\u6709\u6f5c\u5728\u7684\u6570\u636e\u4e22\u5931\uff1b\u5982\u679cpartition\u6240\u6709\u7684replica\u90fd\u5b95\u673a\u4e86\uff0c\u5c31\u65e0\u6cd5\u4fdd\u8bc1\u6570\u636e\u4e0d\u4e22\u5931\u4e86\u3002\n<\/p><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u4e00\u3001Kafka\u7b80\u4ecb Kafka\u662f\u4e00\u79cd\u9ad8\u541e\u5410\u91cf\u3001\u5206\u5e03\u5f0f\u3001\u57fa\u4e8e\u53d1\u5e03\/\u8ba2\u9605\u7684\u6d88\u606f\u7cfb\u7edf\uff0c\u6700\u521d\u7531LinkedIn\u516c\u53f8\u5f00\u53d1 &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"http:\/\/www.weijing.co\/?p=1770\"> <span class=\"screen-reader-text\">Kafak\u8bbe\u8ba1\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":"\u4e00\u3001Kafka\u7b80\u4ecb Kafka\u662f\u4e00\u79cd\u9ad8\u541e\u5410\u91cf\u3001\u5206\u5e03\u5f0f\u3001\u57fa\u4e8e\u53d1\u5e03\/\u8ba2\u9605\u7684\u6d88\u606f\u7cfb\u7edf\uff0c\u6700\u521d\u7531LinkedIn\u516c\u53f8\u5f00\u53d1&hellip;","_links":{"self":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/posts\/1770"}],"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=1770"}],"version-history":[{"count":0,"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/posts\/1770\/revisions"}],"wp:attachment":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1770"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1770"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1770"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}