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Server\u96c6\u7fa4\u53ef\u4ee5\u70ed\u5347\u7ea7\u3002"),(0,a.yg)("h2",{id:"\u6d88\u8d39\u8005"},"\u6d88\u8d39\u8005"),(0,a.yg)("h3",{id:"\u6d88\u8d39\u8fc7\u7a0b\u5e42\u7b49"},"\u6d88\u8d39\u8fc7\u7a0b\u5e42\u7b49"),(0,a.yg)("p",null,"RocketMQ\u65e0\u6cd5\u907f\u514d\u6d88\u606f\u91cd\u590d\uff08Exactly-Once\uff09\uff0c\u6240\u4ee5\u5982\u679c\u4e1a\u52a1\u5bf9\u6d88\u8d39\u91cd\u590d\u975e\u5e38\u654f\u611f\uff0c\u52a1\u5fc5\u8981\u5728\u4e1a\u52a1\u5c42\u9762\u8fdb\u884c\u53bb\u91cd\u5904\u7406\u3002\u53ef\u4ee5\u501f\u52a9\u5173\u7cfb\u6570\u636e\u5e93\u8fdb\u884c\u53bb\u91cd\u3002\u9996\u5148\u9700\u8981\u786e\u5b9a\u6d88\u606f\u7684\u552f\u4e00\u952e\uff0c\u53ef\u4ee5\u662fmsgId\uff0c\u4e5f\u53ef\u4ee5\u662f\u6d88\u606f\u5185\u5bb9\u4e2d\u7684\u552f\u4e00\u6807\u8bc6\u5b57\u6bb5\uff0c\u4f8b\u5982\u8ba2\u5355Id\u7b49\u3002\u5728\u6d88\u8d39\u4e4b\u524d\u5224\u65ad\u552f\u4e00\u952e\u662f\u5426\u5728\u5173\u7cfb\u6570\u636e\u5e93\u4e2d\u5b58\u5728\u3002\u5982\u679c\u4e0d\u5b58\u5728\u5219\u63d2\u5165\uff0c\u5e76\u6d88\u8d39\uff0c\u5426\u5219\u8df3\u8fc7\u3002\uff08\u5b9e\u9645\u8fc7\u7a0b\u8981\u8003\u8651\u539f\u5b50\u6027\u95ee\u9898\uff0c\u5224\u65ad\u662f\u5426\u5b58\u5728\u53ef\u4ee5\u5c1d\u8bd5\u63d2\u5165\uff0c\u5982\u679c\u62a5\u4e3b\u952e\u51b2\u7a81\uff0c\u5219\u63d2\u5165\u5931\u8d25\uff0c\u76f4\u63a5\u8df3\u8fc7\uff09"),(0,a.yg)("p",null,"msgId\u4e00\u5b9a\u662f\u5168\u5c40\u552f\u4e00\u6807\u8bc6\u7b26\uff0c\u4f46\u662f\u5b9e\u9645\u4f7f\u7528\u4e2d\uff0c\u53ef\u80fd\u4f1a\u5b58\u5728\u76f8\u540c\u7684\u6d88\u606f\u6709\u4e24\u4e2a\u4e0d\u540cmsgId\u7684\u60c5\u51b5\uff08\u6d88\u8d39\u8005\u4e3b\u52a8\u91cd\u53d1\u3001\u56e0\u5ba2\u6237\u7aef\u91cd\u6295\u673a\u5236\u5bfc\u81f4\u7684\u91cd\u590d\u7b49\uff09\uff0c\u8fd9\u79cd\u60c5\u51b5\u5c31\u9700\u8981\u4f7f\u4e1a\u52a1\u5b57\u6bb5\u8fdb\u884c\u91cd\u590d\u6d88\u8d39\u3002"),(0,a.yg)("h3",{id:"\u6d88\u8d39\u901f\u5ea6\u6162\u7684\u5904\u7406\u65b9\u5f0f"},"\u6d88\u8d39\u901f\u5ea6\u6162\u7684\u5904\u7406\u65b9\u5f0f"),(0,a.yg)("h3",{id:"\u63d0\u9ad8\u6d88\u8d39\u5e76\u884c\u5ea6"},"\u63d0\u9ad8\u6d88\u8d39\u5e76\u884c\u5ea6"),(0,a.yg)("p",null,"\u7edd\u5927\u90e8\u5206\u6d88\u606f\u6d88\u8d39\u884c\u4e3a\u90fd\u5c5e\u4e8e IO \u5bc6\u96c6\u578b\uff0c\u5373\u53ef\u80fd\u662f\u64cd\u4f5c\u6570\u636e\u5e93\uff0c\u6216\u8005\u8c03\u7528 RPC\uff0c\u8fd9\u7c7b\u6d88\u8d39\u884c\u4e3a\u7684\u6d88\u8d39\u901f\u5ea6\u5728\u4e8e\u540e\u7aef\u6570\u636e\u5e93\u6216\u8005\u5916\u7cfb\u7edf\u7684\u541e\u5410\u91cf\uff0c\u901a\u8fc7\u589e\u52a0\u6d88\u8d39\u5e76\u884c\u5ea6\uff0c\u53ef\u4ee5\u63d0\u9ad8\u603b\u7684\u6d88\u8d39\u541e\u5410\u91cf\uff0c\u4f46\u662f\u5e76\u884c\u5ea6\u589e\u52a0\u5230\u4e00\u5b9a\u7a0b\u5ea6\uff0c\u53cd\u800c\u4f1a\u4e0b\u964d\u3002\u6240\u4ee5\uff0c\u5e94\u7528\u5fc5\u987b\u8981\u8bbe\u7f6e\u5408\u7406\u7684\u5e76\u884c\u5ea6\u3002 \u5982\u4e0b\u6709\u51e0\u79cd\u4fee\u6539\u6d88\u8d39\u5e76\u884c\u5ea6\u7684\u65b9\u6cd5\uff1a"),(0,a.yg)("ul",null,(0,a.yg)("li",{parentName:"ul"},"\u540c\u4e00\u4e2a ConsumerGroup \u4e0b\uff0c\u901a\u8fc7\u589e\u52a0 Consumer \u5b9e\u4f8b\u6570\u91cf\u6765\u63d0\u9ad8\u5e76\u884c\u5ea6\uff08\u9700\u8981\u6ce8\u610f\u7684\u662f\u8d85\u8fc7\u8ba2\u9605\u961f\u5217\u6570\u7684 Consumer \u5b9e\u4f8b\u65e0\u6548\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u52a0\u673a\u5668\uff0c\u6216\u8005\u5728\u5df2\u6709\u673a\u5668\u542f\u52a8\u591a\u4e2a\u8fdb\u7a0b\u7684\u65b9\u5f0f\u3002"),(0,a.yg)("li",{parentName:"ul"},"\u63d0\u9ad8\u5355\u4e2a Consumer \u7684\u6d88\u8d39\u5e76\u884c\u7ebf\u7a0b\uff0c\u901a\u8fc7\u4fee\u6539\u53c2\u6570 consumeThreadMin\u3001consumeThreadMax\u5b9e\u73b0\u3002")),(0,a.yg)("h3",{id:"\u6279\u91cf\u65b9\u5f0f\u6d88\u8d39"},"\u6279\u91cf\u65b9\u5f0f\u6d88\u8d39"),(0,a.yg)("p",null,"\u67d0\u4e9b\u4e1a\u52a1\u6d41\u7a0b\u5982\u679c\u652f\u6301\u6279\u91cf\u65b9\u5f0f\u6d88\u8d39\uff0c\u5219\u53ef\u4ee5\u5f88\u5927\u7a0b\u5ea6\u4e0a\u63d0\u9ad8\u6d88\u8d39\u541e\u5410\u91cf\uff0c\u4f8b\u5982\u8ba2\u5355\u6263\u6b3e\u7c7b\u5e94\u7528\uff0c\u4e00\u6b21\u5904\u7406\u4e00\u4e2a\u8ba2\u5355\u8017\u65f6 1 s\uff0c\u4e00\u6b21\u5904\u7406 10 \u4e2a\u8ba2\u5355\u53ef\u80fd\u4e5f\u53ea\u8017\u65f6 2 s\uff0c\u8fd9\u6837\u5373\u53ef\u5927\u5e45\u5ea6\u63d0\u9ad8\u6d88\u8d39\u7684\u541e\u5410\u91cf\uff0c\u901a\u8fc7\u8bbe\u7f6e consumer\u7684 consumeMessageBatchMaxSize \u8fd4\u4e2a\u53c2\u6570\uff0c\u9ed8\u8ba4\u662f 1\uff0c\u5373\u4e00\u6b21\u53ea\u6d88\u8d39\u4e00\u6761\u6d88\u606f\uff0c\u4f8b\u5982\u8bbe\u7f6e\u4e3a N\uff0c\u90a3\u4e48\u6bcf\u6b21\u6d88\u8d39\u7684\u6d88\u606f\u6570\u5c0f\u4e8e\u7b49\u4e8e N\u3002"),(0,a.yg)("h3",{id:"\u8df3\u8fc7\u975e\u91cd\u8981\u6d88\u606f"},"\u8df3\u8fc7\u975e\u91cd\u8981\u6d88\u606f"),(0,a.yg)("p",null,"\u53d1\u751f\u6d88\u606f\u5806\u79ef\u65f6\uff0c\u5982\u679c\u6d88\u8d39\u901f\u5ea6\u4e00\u76f4\u8ffd\u4e0d\u4e0a\u53d1\u9001\u901f\u5ea6\uff0c\u5982\u679c\u4e1a\u52a1\u5bf9\u6570\u636e\u8981\u6c42\u4e0d\u9ad8\u7684\u8bdd\uff0c\u53ef\u4ee5\u9009\u62e9\u4e22\u5f03\u4e0d\u91cd\u8981\u7684\u6d88\u606f\u3002\u4f8b\u5982\uff0c\u5f53\u67d0\u4e2a\u961f\u5217\u7684\u6d88\u606f\u6570\u5806\u79ef\u5230100000\u6761\u4ee5\u4e0a\uff0c\u5219\u5c1d\u8bd5\u4e22\u5f03\u90e8\u5206\u6216\u5168\u90e8\u6d88\u606f\uff0c\u8fd9\u6837\u5c31\u53ef\u4ee5\u5feb\u901f\u8ffd\u4e0a\u53d1\u9001\u6d88\u606f\u7684\u901f\u5ea6\u3002\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a"),(0,a.yg)("pre",null,(0,a.yg)("code",{parentName:"pre",className:"language-java"},"    public ConsumeConcurrentlyStatus consumeMessage(\n            List<MessageExt> msgs,\n            ConsumeConcurrentlyContext context) {\n        long offset = msgs.get(0).getQueueOffset();\n        String maxOffset =\n                msgs.get(0).getProperty(Message.PROPERTY_MAX_OFFSET);\n        long diff = Long.parseLong(maxOffset) - offset;\n        if (diff > 100000) {\n            // TODO \u6d88\u606f\u5806\u79ef\u60c5\u51b5\u7684\u7279\u6b8a\u5904\u7406\n            return ConsumeConcurrentlyStatus.CONSUME_SUCCESS;\n        }\n        // TODO \u6b63\u5e38\u6d88\u8d39\u8fc7\u7a0b\n        return ConsumeConcurrentlyStatus.CONSUME_SUCCESS;\n    }    \n")),(0,a.yg)("h4",{id:"\u4f18\u5316\u6bcf\u6761\u6d88\u606f\u6d88\u8d39\u8fc7\u7a0b"},"\u4f18\u5316\u6bcf\u6761\u6d88\u606f\u6d88\u8d39\u8fc7\u7a0b"),(0,a.yg)("p",null,"\u4e3e\u4f8b\u5982\u4e0b\uff0c\u67d0\u6761\u6d88\u606f\u7684\u6d88\u8d39\u8fc7\u7a0b\u5982\u4e0b\uff1a"),(0,a.yg)("ul",null,(0,a.yg)("li",{parentName:"ul"},"\u6839\u636e\u6d88\u606f\u4ece DB \u67e5\u8be2\u3010\u6570\u636e 1\u3011"),(0,a.yg)("li",{parentName:"ul"},"\u6839\u636e\u6d88\u606f\u4ece DB \u67e5\u8be2\u3010\u6570\u636e 2\u3011"),(0,a.yg)("li",{parentName:"ul"},"\u590d\u6742\u7684\u4e1a\u52a1\u8ba1\u7b97"),(0,a.yg)("li",{parentName:"ul"},"\u5411 DB \u63d2\u5165\u3010\u6570\u636e 3\u3011"),(0,a.yg)("li",{parentName:"ul"},"\u5411 DB \u63d2\u5165\u3010\u6570\u636e 4\u3011")),(0,a.yg)("p",null,"\u8fd9\u6761\u6d88\u606f\u7684\u6d88\u8d39\u8fc7\u7a0b\u4e2d\u67094\u6b21\u4e0e DB\u7684 \u4ea4\u4e92\uff0c\u5982\u679c\u6309\u7167\u6bcf\u6b21 5ms \u8ba1\u7b97\uff0c\u90a3\u4e48\u603b\u5171\u8017\u65f6 20ms\uff0c\u5047\u8bbe\u4e1a\u52a1\u8ba1\u7b97\u8017\u65f6 5ms\uff0c\u90a3\u4e48\u603b\u8fc7\u8017\u65f6 25ms\uff0c\u6240\u4ee5\u5982\u679c\u80fd\u628a 4 \u6b21 DB \u4ea4\u4e92\u4f18\u5316\u4e3a 2 \u6b21\uff0c\u90a3\u4e48\u603b\u8017\u65f6\u5c31\u53ef\u4ee5\u4f18\u5316\u5230 15ms\uff0c\u5373\u603b\u4f53\u6027\u80fd\u63d0\u9ad8\u4e86 40%\u3002\u6240\u4ee5\u5e94\u7528\u5982\u679c\u5bf9\u65f6\u5ef6\u654f\u611f\u7684\u8bdd\uff0c\u53ef\u4ee5\u628aDB\u90e8\u7f72\u5728SSD\u786c\u76d8\uff0c\u76f8\u6bd4\u4e8eSCSI\u78c1\u76d8\uff0c\u524d\u8005\u7684RT\u4f1a\u5c0f\u5f88\u591a\u3002"),(0,a.yg)("h3",{id:"\u6d88\u8d39\u6253\u5370\u65e5\u5fd7"},"\u6d88\u8d39\u6253\u5370\u65e5\u5fd7"),(0,a.yg)("p",null,"\u5982\u679c\u6d88\u606f\u91cf\u8f83\u5c11\uff0c\u5efa\u8bae\u5728\u6d88\u8d39\u5165\u53e3\u65b9\u6cd5\u6253\u5370\u6d88\u606f\uff0c\u6d88\u8d39\u8017\u65f6\u7b49\uff0c\u65b9\u4fbf\u540e\u7eed\u6392\u67e5\u95ee\u9898\u3002"),(0,a.yg)("pre",null,(0,a.yg)("code",{parentName:"pre",className:"language-java"},'   public ConsumeConcurrentlyStatus consumeMessage(\n            List<MessageExt> msgs,\n            ConsumeConcurrentlyContext context) {\n        log.info("RECEIVE_MSG_BEGIN: " + msgs.toString());\n        // TODO \u6b63\u5e38\u6d88\u8d39\u8fc7\u7a0b\n        return ConsumeConcurrentlyStatus.CONSUME_SUCCESS;\n    }   \n')),(0,a.yg)("p",null,"\u5982\u679c\u80fd\u6253\u5370\u6bcf\u6761\u6d88\u606f\u6d88\u8d39\u8017\u65f6\uff0c\u90a3\u4e48\u5728\u6392\u67e5\u6d88\u8d39\u6162\u7b49\u7ebf\u4e0a\u95ee\u9898\u65f6\uff0c\u4f1a\u66f4\u65b9\u4fbf\u3002"),(0,a.yg)("h3",{id:"\u5176\u4ed6\u6d88\u8d39\u5efa\u8bae"},"\u5176\u4ed6\u6d88\u8d39\u5efa\u8bae"),(0,a.yg)("h4",{id:"\u5173\u4e8e\u6d88\u8d39\u8005\u548c\u8ba2\u9605"},"\u5173\u4e8e\u6d88\u8d39\u8005\u548c\u8ba2\u9605"),(0,a.yg)("p",null,"\u7b2c\u4e00\u4ef6\u9700\u8981\u6ce8\u610f\u7684\u4e8b\u60c5\u662f\uff0c\u4e0d\u540c\u7684\u6d88\u8d39\u8005\u7ec4\u53ef\u4ee5\u72ec\u7acb\u7684\u6d88\u8d39\u4e00\u4e9b topic\uff0c\u5e76\u4e14\u6bcf\u4e2a\u6d88\u8d39\u8005\u7ec4\u90fd\u6709\u81ea\u5df1\u7684\u6d88\u8d39\u504f\u79fb\u91cf\uff0c\u8bf7\u786e\u4fdd\u540c\u4e00\u7ec4\u5185\u7684\u6bcf\u4e2a\u6d88\u8d39\u8005\u8ba2\u9605\u4fe1\u606f\u4fdd\u6301\u4e00\u81f4\u3002"),(0,a.yg)("h4",{id:"\u5173\u4e8e\u6709\u5e8f\u6d88\u606f"},"\u5173\u4e8e\u6709\u5e8f\u6d88\u606f"),(0,a.yg)("p",null,"\u6d88\u8d39\u8005\u5c06\u9501\u5b9a\u6bcf\u4e2a\u6d88\u606f\u961f\u5217\uff0c\u4ee5\u786e\u4fdd\u4ed6\u4eec\u88ab\u9010\u4e2a\u6d88\u8d39\uff0c\u867d\u7136\u8fd9\u5c06\u4f1a\u5bfc\u81f4\u6027\u80fd\u4e0b\u964d\uff0c\u4f46\u662f\u5f53\u4f60\u5173\u5fc3\u6d88\u606f\u987a\u5e8f\u7684\u65f6\u5019\u4f1a\u5f88\u6709\u7528\u3002\u6211\u4eec\u4e0d\u5efa\u8bae\u629b\u51fa\u5f02\u5e38\uff0c\u4f60\u53ef\u4ee5\u8fd4\u56de ConsumeOrderlyStatus.SUSPEND_CURRENT_QUEUE_A_MOMENT 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