{"id":371355,"date":"2023-08-11T15:53:38","date_gmt":"2023-08-11T07:53:38","guid":{"rendered":"https:\/\/www.idc.net\/help\/371355\/"},"modified":"2023-08-11T15:53:38","modified_gmt":"2023-08-11T07:53:38","slug":"%e8%bf%99%e7%af%87%e6%96%87%e7%ab%a0%e4%b8%93%e6%b2%bbmq%e4%b8%ad%e9%97%b4%e4%bb%b6%e5%90%84%e7%a7%8d%e7%96%91%e9%9a%be%e6%9d%82%e7%97%87","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/371355\/","title":{"rendered":"\u8fd9\u7bc7\u6587\u7ae0\u4e13\u6cbbMQ\u4e2d\u95f4\u4ef6\u5404\u79cd\u7591\u96be\u6742\u75c7"},"content":{"rendered":"<p>\u3010\u7a3f\u4ef6\u3011\u4e0a\u5468\u5206\u4eab\u7684\u4e00\u7bc7\u300a\u9762\u8bd5\u5927\u6740\u5668\uff1a\u4e3a\u4ec0\u4e48\u4e00\u5b9a\u8981\u7528MQ\u4e2d\u95f4\u4ef6?\u300b\u53d7\u5230\u4e86\u5927\u5bb6\u7684\u4e00\u81f4\u597d\u8bc4\uff0c\u4eca\u5929\u8fd9\u7bc7\u6587\u7ae0\u4e3a\u5927\u5bb6\u603b\u7ed3\u4e0b MQ \u5e94\u7528\u4e2d\u7684\u4e00\u4e9b\u7591\u96be\u6742\u75c7\u3002<\/p>\n<p style=\"text-align: center\"><span>[[257740]]<\/span><\/p>\n<p><strong><span style=\"font-size: x-large\">\u6d88\u606f\u961f\u5217\u6709\u4ec0\u4e48\u4f18\u70b9\u548c\u7f3a\u70b9?<\/span><\/strong><\/p>\n<p>\u4e3a\u4ec0\u4e48\u4f7f\u7528\u6d88\u606f\u961f\u5217?\u5047\u8bbe\u4f60\u7684\u4e1a\u52a1\u573a\u666f\u9047\u5230\u4e2a\u6280\u672f\u6311\u6218\uff0c\u5982\u679c\u4e0d\u7528 MQ \u53ef\u80fd\u4f1a\u5f88\u9ebb\u70e6\uff0c\u4f46\u662f\u4f60\u7528\u4e86 MQ \u4e4b\u540e\u4f1a\u5e26\u7ed9\u4f60\u5f88\u591a\u597d\u5904\u3002<\/p>\n<p>\u6d88\u606f\u961f\u5217 MQ \u7684\u5e38\u89c1\u4f7f\u7528\u573a\u666f\u5176\u5b9e\u6709\u5f88\u591a\uff0c\u4f46\u662f\u6bd4\u8f83\u6838\u5fc3\u7684\u6709\u5982\u4e0b\u4e09\u4e2a\uff1a<\/p>\n<ul>\n<li><strong>\u89e3\u8026<\/strong><\/li>\n<li><strong>\u5f02\u6b65<\/strong><\/li>\n<li><strong>\u524a\u5cf0<\/strong><\/li>\n<\/ul>\n<p>\u89e3\u8026\uff1aA \u7cfb\u7edf\u53d1\u9001\u4e2a\u6570\u636e\u5230 BCD \u4e09\u4e2a\u7cfb\u7edf\uff0c\u63a5\u53e3\u8c03\u7528\u53d1\u9001\uff0c\u90a3\u5982\u679c E \u7cfb\u7edf\u4e5f\u8981\u8fd9\u4e2a\u6570\u636e\u5462?\u90a3\u5982\u679c C \u7cfb\u7edf\u73b0\u5728\u4e0d\u9700\u8981\u4e86\u5462?<\/p>\n<p>\u73b0\u5728 A \u7cfb\u7edf\u53c8\u8981\u53d1\u9001\u7b2c\u4e8c\u79cd\u6570\u636e\u4e86\u5462?\u800c\u4e14 A \u7cfb\u7edf\u8981\u65f6\u65f6\u523b\u523b\u8003\u8651 BCDE \u56db\u4e2a\u7cfb\u7edf\u5982\u679c\u6302\u4e86\u548b\u529e?\u8981\u4e0d\u8981\u91cd\u53d1?\u6211\u8981\u4e0d\u8981\u628a\u6d88\u606f\u5b58\u8d77\u6765?<\/p>\n<p>\u4f60\u9700\u8981\u53bb\u8003\u8651\u4e00\u4e0b\u4f60\u8d1f\u8d23\u7684\u7cfb\u7edf\u4e2d\u662f\u5426\u6709\u7c7b\u4f3c\u7684\u573a\u666f\uff0c\u5c31\u662f\u4e00\u4e2a\u7cfb\u7edf\u6216\u8005\u4e00\u4e2a\u6a21\u5757\uff0c\u8c03\u7528\u4e86\u591a\u4e2a\u7cfb\u7edf\u6216\u8005\u6a21\u5757\uff0c\u4e92\u76f8\u4e4b\u95f4\u7684\u8c03\u7528\u5f88\u590d\u6742\uff0c\u7ef4\u62a4\u8d77\u6765\u5f88\u9ebb\u70e6\u3002<\/p>\n<p>\u4f46\u662f\uff0c\u8fd9\u4e2a\u8c03\u7528\u662f\u4e0d\u9700\u8981\u76f4\u63a5\u540c\u6b65\u8c03\u7528\u63a5\u53e3\u7684\uff0c\u5982\u679c\u7528 MQ \u7ed9\u4ed6\u5f02\u6b65\u5316\u89e3\u8026\uff0c\u4e5f\u662f\u53ef\u4ee5\u7684\u3002\u4f60\u5c31\u53ea\u9700\u8981\u53bb\u8003\u8651\u5728\u4f60\u7684\u9879\u76ee\u91cc\uff0c\u662f\u4e0d\u662f\u53ef\u4ee5\u8fd0\u7528\u8fd9\u4e2a MQ \u53bb\u8fdb\u884c\u7cfb\u7edf\u7684\u89e3\u8026\u3002<\/p>\n<p>\u5f02\u6b65\uff1aA \u7cfb\u7edf\u63a5\u6536\u4e00\u4e2a\u8bf7\u6c42\uff0c\u9700\u8981\u5728\u81ea\u5df1\u672c\u5730\u5199\u5e93\uff0c\u8fd8\u9700\u8981\u5728 BCD \u4e09\u4e2a\u7cfb\u7edf\u5199\u5e93\uff0c\u81ea\u5df1\u672c\u5730\u5199\u5e93\u8981 30ms\uff0cBCD \u4e09\u4e2a\u7cfb\u7edf\u5206\u522b\u5199\u5e93\u8981 300ms\u3001450ms\u3001200ms\u3002<\/p>\n<p>\u6700\u7ec8\u8bf7\u6c42\u603b\u5ef6\u65f6\u662f 30 + 300 + 450 + 200 = 980ms\uff0c\u63a5\u8fd1 1s\uff0c\u5f02\u6b65\u540e\uff0cBCD \u4e09\u4e2a\u7cfb\u7edf\u5206\u522b\u5199\u5e93\u7684\u65f6\u95f4\uff0cA \u7cfb\u7edf\u5c31\u4e0d\u518d\u8003\u8651\u4e86\u3002<\/p>\n<p>\u524a\u5cf0\uff1a\u6bcf\u5929 0 \u70b9\u5230 16 \u70b9\uff0cA \u7cfb\u7edf\u98ce\u5e73\u6d6a\u9759\uff0c\u6bcf\u79d2\u5e76\u53d1\u8bf7\u6c42\u6570\u91cf\u5c31 100 \u4e2a\u3002\u7ed3\u679c\u6bcf\u6b21\u4e00\u5230 16 \u70b9~23 \u70b9\uff0c\u6bcf\u79d2\u5e76\u53d1\u8bf7\u6c42\u6570\u91cf\u7a81\u7136\u4f1a\u66b4\u589e\u5230 10000 \u6761\u3002<\/p>\n<p>\u4f46\u662f\u7cfb\u7edf\u7684\u5904\u7406\u80fd\u529b\u5c31\u53ea\u80fd\u662f\u6bcf\u79d2\u949f\u5904\u7406 1000 \u4e2a\u8bf7\u6c42\u554a\u3002\u600e\u4e48\u529e?\u9700\u8981\u6211\u4eec\u8fdb\u884c\u6d41\u91cf\u7684\u524a\u5cf0\uff0c\u8ba9\u7cfb\u7edf\u53ef\u4ee5\u5e73\u7f13\u7684\u5904\u7406\u7a81\u589e\u7684\u8bf7\u6c42\u3002<\/p>\n<p>\u4f18\u70b9\u4e0a\u9762\u5df2\u7ecf\u8bf4\u4e86\uff0c\u5c31\u662f\u5728\u7279\u6b8a\u573a\u666f\u4e0b\u6709\u5176\u5bf9\u5e94\u7684\u597d\u5904\uff0c\u89e3\u8026\u3001\u5f02\u6b65\u3001\u524a\u5cf0\uff0c\u90a3\u4e48\u6d88\u606f\u961f\u5217\u6709\u4ec0\u4e48\u7f3a\u70b9?<\/p>\n<p>\u7cfb\u7edf\u53ef\u7528\u6027\u964d\u4f4e\uff1a\u7cfb\u7edf\u5f15\u5165\u7684\u5916\u90e8\u4f9d\u8d56\u8d8a\u591a\uff0c\u8d8a\u5bb9\u6613\u6302\u6389\uff0c\u672c\u6765\u4f60\u5c31\u662f A \u7cfb\u7edf\u8c03\u7528 BCD \u4e09\u4e2a\u7cfb\u7edf\u7684\u63a5\u53e3\u5c31\u597d\u4e86\u3002<\/p>\n<p>ABCD \u56db\u4e2a\u7cfb\u7edf\u597d\u597d\u7684\uff0c\u6ca1\u5565\u95ee\u9898\uff0c\u4f60\u504f\u52a0\u4e2a MQ \u8fdb\u6765\uff0c\u4e07\u4e00 MQ \u6302\u4e86\u600e\u4e48\u529e?MQ \u6302\u4e86\uff0c\u6574\u5957\u7cfb\u7edf\u5d29\u6e83\u4e86\uff0c\u4e1a\u52a1\u4e5f\u5c31\u505c\u987f\u4e86\u3002<\/p>\n<p>\u7cfb\u7edf\u590d\u6742\u6027\u63d0\u9ad8\uff1a\u786c\u751f\u751f\u52a0\u4e2a MQ \u8fdb\u6765\uff0c\u600e\u4e48\u4fdd\u8bc1\u6d88\u606f\u6ca1\u6709\u91cd\u590d\u6d88\u8d39?\u600e\u4e48\u5904\u7406\u6d88\u606f\u4e22\u5931\u7684\u60c5\u51b5?\u600e\u4e48\u4fdd\u8bc1\u6d88\u606f\u4f20\u9012\u7684\u987a\u5e8f\u6027?<\/p>\n<p>\u4e00\u81f4\u6027\u95ee\u9898\uff1aA \u7cfb\u7edf\u5904\u7406\u5b8c\u4e86\u76f4\u63a5\u8fd4\u56de\u6210\u529f\u4e86\uff0c\u5927\u5bb6\u90fd\u4ee5\u4e3a\u4f60\u8fd9\u4e2a\u8bf7\u6c42\u5c31\u6210\u529f\u4e86\u3002<\/p>\n<p>\u4f46\u95ee\u9898\u662f\uff0c\u8981\u662f BCD \u4e09\u4e2a\u7cfb\u7edf\u90a3\u91cc\uff0cBD \u4e24\u4e2a\u7cfb\u7edf\u5199\u5e93\u6210\u529f\u4e86\uff0c\u7ed3\u679c C \u7cfb\u7edf\u5199\u5e93\u5931\u8d25\u4e86\uff0c\u4f60\u8fd9\u6570\u636e\u5c31\u4e0d\u4e00\u81f4\u4e86\u3002<\/p>\n<p>\u6240\u4ee5\u6d88\u606f\u961f\u5217\u5b9e\u9645\u662f\u4e00\u79cd\u975e\u5e38\u590d\u6742\u7684\u67b6\u6784\uff0c\u4f60\u5f15\u5165\u5b83\u6709\u5f88\u591a\u597d\u5904\uff0c\u4f46\u662f\u4e5f\u5f97\u9488\u5bf9\u5b83\u5e26\u6765\u7684\u574f\u5904\u505a\u5404\u79cd\u989d\u5916\u7684\u6280\u672f\u65b9\u6848\u548c\u67b6\u6784\u6765\u89c4\u907f\u6389\u3002<\/p>\n<p>\u5e38\u89c1\u6d88\u606f\u961f\u5217\u7684\u6bd4\u8f83\u5982\u4e0b\u56fe\uff1a<\/p>\n<p style=\"text-align: center\">\n<p><strong><span style=\"font-size: x-large\">\u5982\u4f55\u89e3\u51b3\u91cd\u590d\u6d88\u8d39?<\/span><\/strong><\/p>\n<p><strong><span style=\"font-size: large\">\u6d88\u606f\u91cd\u590d\u7684\u539f\u56e0<\/span><\/strong><\/p>\n<p>\u6d88\u606f\u53d1\u9001\u7aef\u5e94\u7528\u7684\u6d88\u606f\u91cd\u590d\u53d1\u9001\uff0c\u6709\u4ee5\u4e0b\u51e0\u79cd\u60c5\u51b5\uff1a<\/p>\n<ul>\n<li>\u6d88\u606f\u53d1\u9001\u7aef\u53d1\u9001\u6d88\u606f\u7ed9\u6d88\u606f\u4e2d\u95f4\u4ef6\uff0c\u6d88\u606f\u4e2d\u95f4\u4ef6\u6536\u5230\u6d88\u606f\u5e76\u6210\u529f\u5b58\u50a8\uff0c\u800c\u8fd9\u65f6\u6d88\u606f\u4e2d\u95f4\u4ef6\u51fa\u73b0\u4e86\u95ee\u9898\uff0c\u5bfc\u81f4\u5e94\u7528\u7aef\u6ca1\u6709\u6536\u5230\u6d88\u606f\u53d1\u9001\u6210\u529f\u7684\u8fd4\u56de\u56e0\u800c\u8fdb\u884c\u91cd\u8bd5\u4ea7\u751f\u4e86\u91cd\u590d\u3002<\/li>\n<li>\u6d88\u606f\u4e2d\u95f4\u4ef6\u56e0\u4e3a\u8d1f\u8f7d\u9ad8\u54cd\u5e94\u53d8\u6162\uff0c\u6210\u529f\u628a\u6d88\u606f\u5b58\u50a8\u5230\u6d88\u606f\u5b58\u50a8\u4e2d\u540e\uff0c\u8fd4\u56de\u201c\u6210\u529f\u201d\u8fd9\u4e2a\u7ed3\u679c\u65f6\u8d85\u65f6\u3002<\/li>\n<li>\u6d88\u606f\u4e2d\u95f4\u4ef6\u5c06\u6d88\u606f\u6210\u529f\u5199\u5165\u6d88\u606f\u5b58\u50a8\uff0c\u5728\u8fd4\u56de\u7ed3\u679c\u65f6\u7f51\u7edc\u51fa\u73b0\u95ee\u9898\uff0c\u5bfc\u81f4\u5e94\u7528\u53d1\u9001\u7aef\u91cd\u8bd5\uff0c\u800c\u91cd\u8bd5\u65f6\u7f51\u7edc\u6062\u590d\uff0c\u7531\u6b64\u5bfc\u81f4\u91cd\u590d\u3002<\/li>\n<\/ul>\n<p>\u53ef\u4ee5\u770b\u5230\uff0c\u901a\u8fc7\u6d88\u606f\u53d1\u9001\u7aef\u4ea7\u751f\u6d88\u606f\u91cd\u590d\u7684\u4e3b\u8981\u539f\u56e0\u662f\u6d88\u606f\u6210\u529f\u8fdb\u5165\u6d88\u606f\u5b58\u50a8\u540e\uff0c\u56e0\u4e3a\u5404\u79cd\u539f\u56e0\u4f7f\u5f97\u6d88\u606f\u53d1\u9001\u7aef\u6ca1\u6709\u6536\u5230\u201c\u6210\u529f\u201d\u7684\u8fd4\u56de\u7ed3\u679c\uff0c\u5e76\u4e14\u53c8\u6709\u91cd\u8bd5\u673a\u5236\uff0c\u56e0\u800c\u5bfc\u81f4\u91cd\u590d\u3002<\/p>\n<p>\u6d88\u606f\u5230\u8fbe\u4e86\u6d88\u606f\u5b58\u50a8\uff0c\u7531\u6d88\u606f\u4e2d\u95f4\u4ef6\u8fdb\u884c\u5411\u5916\u7684\u6295\u9012\u65f6\u4ea7\u751f\u91cd\u590d\uff0c\u6709\u4ee5\u4e0b\u51e0\u79cd\u60c5\u51b5\uff1a<\/p>\n<ul>\n<li>\u6d88\u606f\u88ab\u6295\u9012\u5230\u6d88\u606f\u63a5\u6536\u8005\u5e94\u7528\u8fdb\u884c\u5904\u7406\uff0c\u5904\u7406\u5b8c\u6bd5\u540e\u5e94\u7528\u51fa\u95ee\u9898\u4e86\uff0c\u6d88\u606f\u4e2d\u95f4\u4ef6\u4e0d\u77e5\u9053\u6d88\u606f\u5904\u7406\u7ed3\u679c\uff0c\u4f1a\u518d\u6b21\u6295\u9012\u3002<\/li>\n<li>\u6d88\u606f\u88ab\u6295\u9012\u5230\u6d88\u606f\u63a5\u6536\u8005\u5e94\u7528\u8fdb\u884c\u5904\u7406\uff0c\u5904\u7406\u5b8c\u6bd5\u540e\u7f51\u7edc\u51fa\u73b0\u95ee\u9898\u4e86\uff0c\u6d88\u606f\u4e2d\u95f4\u4ef6\u6ca1\u6709\u6536\u5230\u6d88\u606f\u5904\u7406\u7ed3\u679c\uff0c\u4f1a\u518d\u6b21\u6295\u9012\u3002<\/li>\n<li>\u6d88\u606f\u88ab\u6295\u9012\u5230\u6d88\u606f\u63a5\u6536\u8005\u5e94\u7528\u8fdb\u884c\u5904\u7406\uff0c\u5904\u7406\u65f6\u95f4\u6bd4\u8f83\u957f\uff0c\u6d88\u606f\u4e2d\u95f4\u4ef6\u56e0\u4e3a\u6d88\u606f\u8d85\u65f6\u4f1a\u518d\u6b21\u6295\u9012\u3002<\/li>\n<li>\u6d88\u606f\u88ab\u6295\u9012\u5230\u6d88\u606f\u63a5\u6536\u8005\u5e94\u7528\u8fdb\u884c\u5904\u7406\uff0c\u5904\u7406\u5b8c\u6bd5\u540e\u6d88\u606f\u4e2d\u95f4\u4ef6\u51fa\u95ee\u9898\u4e86,\u6ca1\u80fd\u6536\u5230\u6d88\u606f\u7ed3\u679c\u5e76\u5904\u7406\uff0c\u4f1a\u518d\u6b21\u6295\u9012\u3002<\/li>\n<li>\u6d88\u606f\u88ab\u6295\u9012\u5230\u6d88\u606f\u63a5\u6536\u8005\u5e94\u7528\u8fdb\u884c\u5904\u7406\uff0c\u5904\u7406\u5b8c\u6bd5\u540e\u6d88\u606f\u4e2d\u95f4\u4ef6\u6536\u5230\u7ed3\u679c\u4f46\u662f\u9047\u5230\u6d88\u606f\u5b58\u50a8\u6545\u969c\uff0c\u6ca1\u80fd\u66f4\u65b0\u6295\u9012\u72b6\u6001\uff0c\u4f1a\u518d\u6b21\u6295\u9012\u3002<\/li>\n<\/ul>\n<p>\u53ef\u4ee5\u770b\u5230\uff0c\u5728\u6295\u9012\u8fc7\u7a0b\u4e2d\u4ea7\u751f\u7684\u6d88\u606f\u91cd\u590d\u63a5\u6536\u4e3b\u8981\u662f\u56e0\u4e3a\u6d88\u606f\u63a5\u6536\u8005\u6210\u529f\u5904\u7406\u5b8c\u6d88\u606f\u540e\uff0c\u6d88\u606f\u4e2d\u95f4\u4ef6\u4e0d\u80fd\u53ca\u65f6\u66f4\u65b0\u6295\u9012\u72b6\u6001\u9020\u6210\u7684\u3002<\/p>\n<p><strong><span style=\"font-size: large\">\u5982\u4f55\u89e3\u51b3\u91cd\u590d\u6d88\u8d39<\/span><\/strong><\/p>\n<p>\u90a3\u4e48\u6709\u4ec0\u4e48\u529e\u6cd5\u53ef\u4ee5\u89e3\u51b3\u5462?\u4e3b\u8981\u662f\u8981\u6c42\u6d88\u606f\u63a5\u6536\u8005\u6765\u5904\u7406\u8fd9\u79cd\u91cd\u590d\u7684\u60c5\u51b5\uff0c\u4e5f\u5c31\u662f\u8981\u6c42\u6d88\u606f\u63a5\u6536\u8005\u7684\u6d88\u606f\u5904\u7406\u662f\u5e42\u7b49\u64cd\u4f5c\u3002<\/p>\n<p>\u4ec0\u4e48\u662f\u5e42\u7b49\u6027?\u5bf9\u4e8e\u6d88\u606f\u63a5\u6536\u7aef\u7684\u60c5\u51b5\uff0c\u5e42\u7b49\u7684\u542b\u4e49\u662f\u91c7\u7528\u540c\u6837\u7684\u8f93\u5165\u591a\u6b21\u8c03\u7528\u5904\u7406\u51fd\u6570\uff0c\u5f97\u5230\u540c\u6837\u7684\u7ed3\u679c\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u4e00\u4e2a SQL \u64cd\u4f5c\uff1a<\/p>\n<pre>\n \n \n \n <ol>\n  \n  \n  \n  <li><span>update<\/span>&nbsp;stat_table&nbsp;<span>set<\/span>&nbsp;<span>count<\/span>=&nbsp;10&nbsp;<span>where<\/span>&nbsp;id&nbsp;=1&nbsp;<\/li>\n \n \n \n <\/ol><\/pre>\n<p>\u8fd9\u4e2a\u64cd\u4f5c\u591a\u6b21\u6267\u884c\uff0cid \u7b49\u4e8e 1 \u7684\u8bb0\u5f55\u4e2d\u7684 count \u5b57\u6bb5\u7684\u503c\u90fd\u4e3a 10\uff0c\u8fd9\u4e2a\u64cd\u4f5c\u5c31\u662f\u5e42\u7b49\u7684\uff0c\u6211\u4eec\u4e0d\u7528\u62c5\u5fc3\u8fd9\u4e2a\u64cd\u4f5c\u88ab\u91cd\u590d\u3002<\/p>\n<p>\u518d\u6765\u770b\u53e6\u5916\u4e00\u4e2a SQL \u64cd\u4f5c\uff1a<\/p>\n<pre>\n \n \n \n <ol>\n  \n  \n  \n  <li><span>update<\/span>&nbsp;stat_table&nbsp;<span>set<\/span>&nbsp;<span>count<\/span>=&nbsp;<span>count<\/span>&nbsp;+1&nbsp;<span>where<\/span>&nbsp;id=&nbsp;1;&nbsp;<\/li>\n \n \n \n <\/ol><\/pre>\n<p>\u8fd9\u6837\u7684 SQL \u64cd\u4f5c\u5c31\u4e0d\u662f\u5e42\u7b49\u7684\uff0c\u4e00\u65e6\u91cd\u590d\uff0c\u7ed3\u679c\u5c31\u4f1a\u4ea7\u751f\u53d8\u5316\u3002<\/p>\n<p>\u56e0\u6b64\u5e94\u5bf9\u6d88\u606f\u91cd\u590d\u7684\u529e\u6cd5\u662f\u4f7f\u6d88\u606f\u63a5\u6536\u7aef\u7684\u5904\u7406\u662f\u4e00\u4e2a\u5e42\u7b49\u64cd\u4f5c\u3002\u8fd9\u6837\u7684\u505a\u6cd5\u964d\u4f4e\u4e86\u6d88\u606f\u4e2d\u95f4\u4ef6\u7684\u6574\u4f53\u590d\u6742\u6027\uff0c\u4e0d\u8fc7\u4e5f\u7ed9\u4f7f\u7528\u6d88\u606f\u4e2d\u95f4\u4ef6\u7684\u6d88\u606f\u63a5\u6536\u7aef\u5e94\u7528\u5e26\u6765\u4e86\u4e00\u5b9a\u7684\u9650\u5236\u548c\u95e8\u69db\u3002<\/p>\n<p><strong>\u2460MVCC<\/strong><\/p>\n<p>\u591a\u7248\u672c\u5e76\u53d1\u63a7\u5236\uff0c\u4e50\u89c2\u9501\u7684\u4e00\u79cd\u5b9e\u73b0\uff0c\u5728\u751f\u4ea7\u8005\u53d1\u9001\u6d88\u606f\u65f6\u8fdb\u884c\u6570\u636e\u66f4\u65b0\u65f6\u9700\u8981\u5e26\u4e0a\u6570\u636e\u7684\u7248\u672c\u53f7\uff0c\u6d88\u8d39\u8005\u53bb\u66f4\u65b0\u65f6\u9700\u8981\u53bb\u6bd4\u8f83\u6301\u6709\u6570\u636e\u7684\u7248\u672c\u53f7\uff0c\u7248\u672c\u53f7\u4e0d\u4e00\u81f4\u7684\u64cd\u4f5c\u65e0\u6cd5\u6210\u529f\u3002<\/p>\n<p>\u4f8b\u5982\u535a\u5ba2\u70b9\u8d5e\u6b21\u6570\u81ea\u52a8 +1 \u7684\u63a5\u53e3\uff1a<\/p>\n<pre>\n \n \n \n <ol>\n  \n  \n  \n  <li><span>public<\/span>&nbsp;boolean&nbsp;addCount(Long&nbsp;id,&nbsp;Long&nbsp;version);&nbsp;<\/li>\n  \n  \n  \n  <li><span>update<\/span>&nbsp;blogTable&nbsp;<span>set<\/span>&nbsp;<span>count<\/span>=&nbsp;<span>count<\/span>+1,version=version+1&nbsp;<span>where<\/span>&nbsp;id=321&nbsp;<span>and<\/span>&nbsp;version=123&nbsp;<\/li>\n \n \n \n <\/ol><\/pre>\n<p>\u6bcf\u4e00\u4e2a version \u53ea\u6709\u4e00\u6b21\u6267\u884c\u6210\u529f\u7684\u673a\u4f1a\uff0c\u4e00\u65e6\u5931\u8d25\u4e86\u751f\u4ea7\u8005\u5fc5\u987b\u91cd\u65b0\u83b7\u53d6\u6570\u636e\u7684\u65b0\u7248\u672c\u53f7\u518d\u6b21\u53d1\u8d77\u66f4\u65b0\u3002<\/p>\n<p><strong>\u2461\u53bb\u91cd\u8868<\/strong><\/p>\n<p>\u5229\u7528\u6570\u636e\u5e93\u8868\u5355\u7684\u7279\u6027\u6765\u5b9e\u73b0\u5e42\u7b49\uff0c\u5e38\u7528\u7684\u4e00\u4e2a\u601d\u8def\u662f\u5728\u8868\u4e0a\u6784\u5efa\u7d22\u5f15\uff0c\u4fdd\u8bc1\u67d0\u4e00\u7c7b\u6570\u636e\u4e00\u65e6\u6267\u884c\u5b8c\u6bd5\uff0c\u540e\u7eed\u540c\u6837\u7684\u8bf7\u6c42\u4e0d\u518d\u91cd\u590d\u5904\u7406\u4e86(\u5229\u7528\u4e00\u5f20\u65e5\u5fd7\u8868\u6765\u8bb0\u5f55\u5df2\u7ecf\u5904\u7406\u6210\u529f\u7684\u6d88\u606f\u7684 id\uff0c\u5982\u679c\u65b0\u5230\u7684\u6d88\u606f id \u5df2\u7ecf\u5728\u65e5\u5fd7\u8868\u4e2d\uff0c\u90a3\u4e48\u5c31\u4e0d\u518d\u5904\u7406\u8fd9\u6761\u6d88\u606f\u3002)<\/p>\n<p>\u4ee5\u7535\u5546\u5e73\u53f0\u4e3a\u4f8b\u5b50\uff0c\u7535\u5546\u5e73\u53f0\u4e0a\u7684\u8ba2\u5355 id \u5c31\u662f\u6700\u9002\u5408\u7684 token\u3002\u5f53\u7528\u6237\u4e0b\u5355\u65f6\uff0c\u4f1a\u7ecf\u5386\u591a\u4e2a\u73af\u8282\uff0c\u6bd4\u5982\u751f\u6210\u8ba2\u5355\uff0c\u51cf\u5e93\u5b58\uff0c\u51cf\u4f18\u60e0\u5238\u7b49\u7b49\u3002<\/p>\n<p>\u6bcf\u4e00\u4e2a\u73af\u8282\u6267\u884c\u65f6\u90fd\u5148\u68c0\u6d4b\u4e00\u4e0b\u8be5\u8ba2\u5355 id \u662f\u5426\u5df2\u7ecf\u6267\u884c\u8fc7\u8fd9\u4e00\u6b65\u9aa4\uff0c\u5bf9\u672a\u6267\u884c\u7684\u8bf7\u6c42\uff0c\u6267\u884c\u64cd\u4f5c\u5e76\u7f13\u5b58\u7ed3\u679c\uff0c\u800c\u5bf9\u5df2\u7ecf\u6267\u884c\u8fc7\u7684 id\uff0c\u5219\u76f4\u63a5\u8fd4\u56de\u4e4b\u524d\u7684\u6267\u884c\u7ed3\u679c\uff0c\u4e0d\u505a\u4efb\u4f55\u64cd\u4f5c\u3002<\/p>\n<p>\u8fd9\u6837\u53ef\u4ee5\u5728\u66f4\u5927\u7a0b\u5ea6\u4e0a\u907f\u514d\u64cd\u4f5c\u7684\u91cd\u590d\u6267\u884c\u95ee\u9898\uff0c\u7f13\u5b58\u8d77\u6765\u7684\u6267\u884c\u7ed3\u679c\u4e5f\u80fd\u7528\u4e8e\u4e8b\u52a1\u7684\u63a7\u5236\u7b49\u3002<\/p>\n<p><strong><span style=\"font-size: x-large\">\u5982\u4f55\u4fdd\u8bc1\u6d88\u606f\u7684\u53ef\u9760\u6027\u4f20\u8f93?<\/span><\/strong><\/p>\n<p><span style=\"font-size: large\"><strong>ActiveMQ<\/strong><\/span><\/p>\n<p>\u8981\u4fdd\u8bc1\u6d88\u606f\u7684\u53ef\u9760\u6027\uff0c\u9664\u4e86\u6d88\u606f\u7684\u6301\u4e45\u5316\uff0c\u8fd8\u5305\u62ec\u4e24\u4e2a\u65b9\u9762\uff1a<\/p>\n<ul>\n<li>\u751f\u4ea7\u8005\u53d1\u9001\u7684\u6d88\u606f\u53ef\u4ee5\u88ab ActiveMQ \u6536\u5230\u3002<\/li>\n<li>\u6d88\u8d39\u8005\u6536\u5230\u4e86 ActiveMQ \u53d1\u9001\u7684\u6d88\u606f\u3002<\/li>\n<\/ul>\n<p><strong>\u2460\u751f\u4ea7\u8005<\/strong><\/p>\n<p>\u975e\u6301\u4e45\u5316\u53c8\u4e0d\u5728\u4e8b\u52a1\u4e2d\u7684\u6d88\u606f\uff0c\u53ef\u80fd\u4f1a\u6709\u6d88\u606f\u7684\u4e22\u5931\u3002\u4e3a\u4fdd\u8bc1\u6d88\u606f\u53ef\u4ee5\u88ab ActiveMQ \u6536\u5230\uff0c\u6211\u4eec\u5e94\u8be5\u91c7\u7528\u4e8b\u52a1\u6d88\u606f\u6216\u6301\u4e45\u5316\u6d88\u606f\u3002<\/p>\n<p><strong>\u2461\u6d88\u8d39\u8005<\/strong><\/p>\n<p>\u6d88\u8d39\u8005\u5bf9\u6d88\u606f\u7684\u786e\u8ba4\u6709\u56db\u79cd\u673a\u5236\uff1a<\/p>\n<ul>\n<li><strong>AUTO_ACKNOWLEDGE=1\uff1a\u81ea\u52a8\u786e\u8ba4<\/strong><\/li>\n<li><strong>CLIENT_ACKNOWLEDGE=2\uff1a\u5ba2\u6237\u7aef\u624b\u52a8\u786e\u8ba4<\/strong><\/li>\n<li><strong>DUPS_OK_ACKNOWLEDGE=3\uff1a\u81ea\u52a8\u6279\u91cf\u786e\u8ba4<\/strong><\/li>\n<li><strong>SESSION_TRANSACTED=0\uff1a\u4e8b\u52a1\u63d0\u4ea4\u5e76\u786e\u8ba4<\/strong><\/li>\n<\/ul>\n<p>ACK_MODE \u63cf\u8ff0\u4e86 Consumer \u4e0e Broker \u786e\u8ba4\u6d88\u606f\u7684\u65b9\u5f0f(\u65f6\u673a)\uff0c\u6bd4\u5982\u5f53\u6d88\u606f\u88ab Consumer \u63a5\u6536\u4e4b\u540e\uff0cConsumer \u5c06\u5728\u4f55\u65f6\u786e\u8ba4\u6d88\u606f\u3002<\/p>\n<p>\u6240\u4ee5 ack_mode \u63cf\u8ff0\u7684\u4e0d\u662f Producer \u4e0e Broker \u4e4b\u95f4\u7684\u5173\u7cfb\uff0c\u800c\u662f Customer \u4e0e Broker \u4e4b\u95f4\u7684\u5173\u7cfb\u3002<\/p>\n<p>\u5bf9\u4e8e Broker \u800c\u8a00\uff0c\u53ea\u6709\u63a5\u6536\u5230 ACK \u6307\u4ee4\uff0c\u624d\u4f1a\u8ba4\u4e3a\u6d88\u606f\u88ab\u6b63\u786e\u7684\u63a5\u6536\u6216\u8005\u5904\u7406\u6210\u529f\u4e86\u3002\u901a\u8fc7 ACK\uff0c\u53ef\u4ee5\u5728 Consumer \u4e0e Broker \u4e4b\u95f4\u5efa\u7acb\u4e00\u79cd\u7b80\u5355\u7684\u201c\u62c5\u4fdd\u201d\u673a\u5236\u3002<\/p>\n<p>AUTO_ACKNOWLEDGE\uff1a\u81ea\u52a8\u786e\u8ba4\uff0c\u201c\u540c\u6b65\u201d(receive)\u65b9\u6cd5\u8fd4\u56de message \u7ed9\u6d88\u606f\u65f6\u4f1a\u7acb\u5373\u786e\u8ba4\u3002<\/p>\n<p>\u5728\"\u5f02\u6b65\"(messageListener)\u65b9\u5f0f\u4e2d\uff0c\u5c06\u4f1a\u9996\u5148\u8c03\u7528listener.onMessage(message)\u3002<\/p>\n<p>\u5982\u679c onMessage \u65b9\u6cd5\u6b63\u5e38\u7ed3\u675f\uff0c\u6d88\u606f\u5c06\u4f1a\u6b63\u5e38\u786e\u8ba4;\u5982\u679c onMessage \u65b9\u6cd5\u5f02\u5e38\uff0c\u5c06\u5bfc\u81f4\u6d88\u8d39\u8005\u8981\u6c42 ActiveMQ \u91cd\u53d1\u6d88\u606f\u3002<\/p>\n<p>CLIENT_ACKNOWLEDGE\uff1a\u5ba2\u6237\u7aef\u624b\u52a8\u786e\u8ba4\uff0c\u8fd9\u5c31\u610f\u5473\u7740 AcitveMQ \u5c06\u4e0d\u4f1a\u201c\u81ea\u4f5c\u4e3b\u5f20\u201d\u7684\u4e3a\u4f60 ACK \u4efb\u4f55\u6d88\u606f\uff0c\u5f00\u53d1\u8005\u9700\u8981\u81ea\u5df1\u62e9\u673a\u786e\u8ba4\u3002<\/p>\n<p>\u6211\u4eec\u53ef\u4ee5\u5728\u5f53\u524d\u6d88\u606f\u5904\u7406\u6210\u529f\u4e4b\u540e\uff0c\u7acb\u5373\u8c03\u7528 message.acknowledge() \u65b9\u6cd5\u6765\"\u9010\u4e2a\"\u786e\u8ba4\u6d88\u606f\uff0c\u8fd9\u6837\u53ef\u4ee5\u5c3d\u53ef\u80fd\u7684\u51cf\u5c11\u56e0\u7f51\u7edc\u6545\u969c\u800c\u5bfc\u81f4\u6d88\u606f\u91cd\u53d1\u7684\u4e2a\u6570\u3002<\/p>\n<p>\u5f53\u7136\u4e5f\u53ef\u4ee5\u5904\u7406\u591a\u6761\u6d88\u606f\u4e4b\u540e\uff0c\u95f4\u6b47\u6027\u7684\u8c03\u7528 ACKNOWLEDGE \u65b9\u6cd5\u6765\u4e00\u6b21\u786e\u8ba4\u591a\u6761\u6d88\u606f\uff0c\u51cf\u5c11 ACK \u7684\u6b21\u6570\u6765\u63d0\u5347 Consumer \u7684\u6548\u7387\uff0c\u4e0d\u8fc7\u9700\u8981\u81ea\u884c\u6743\u8861\u3002<\/p>\n<p>DUPS_OK_ACKNOWLEDGE\uff1a\u7c7b\u4f3c\u4e8e AUTO_ACK \u786e\u8ba4\u673a\u5236\uff0c\u4e3a\u81ea\u52a8\u6279\u91cf\u786e\u8ba4\u800c\u751f\uff0c\u800c\u4e14\u5177\u6709\u201c\u5ef6\u8fdf\u201d\u786e\u8ba4\u7684\u7279\u70b9\uff0cActiveMQ \u4f1a\u6839\u636e\u5185\u90e8\u7b97\u6cd5\uff0c\u5728\u6536\u5230\u4e00\u5b9a\u6570\u91cf\u7684\u6d88\u606f\u81ea\u52a8\u8fdb\u884c\u786e\u8ba4\u3002<\/p>\n<p>\u5728\u6b64\u6a21\u5f0f\u4e0b\uff0c\u53ef\u80fd\u4f1a\u51fa\u73b0\u91cd\u590d\u6d88\u606f\uff0c\u4ec0\u4e48\u65f6\u5019?\u5f53 Consumer \u6545\u969c\u91cd\u542f\u540e\uff0c\u90a3\u4e9b\u5c1a\u672a ACK \u7684\u6d88\u606f\u4f1a\u91cd\u65b0\u53d1\u9001\u8fc7\u6765\u3002<\/p>\n<p>SESSION_TRANSACTED\uff1a\u5f53 Session \u4f7f\u7528\u4e8b\u52a1\u65f6\uff0c\u5c31\u662f\u4f7f\u7528\u6b64\u6a21\u5f0f\u3002\u5f53\u51b3\u5b9a\u4e8b\u52a1\u4e2d\u7684\u6d88\u606f\u53ef\u4ee5\u786e\u8ba4\u65f6\uff0c\u5fc5\u987b\u8c03\u7528 session.commit() \u65b9\u6cd5\uff0cCommit \u65b9\u6cd5\u5c06\u4f1a\u5bfc\u81f4\u5f53\u524d Session \u7684\u4e8b\u52a1\u4e2d\u6240\u6709\u6d88\u606f\u7acb\u5373\u88ab\u786e\u8ba4\u3002<\/p>\n<p>\u5728\u4e8b\u52a1\u5f00\u59cb\u4e4b\u540e\u7684\u4efb\u4f55\u65f6\u673a\u8c03\u7528 rollback()\uff0c\u610f\u5473\u7740\u5f53\u524d\u4e8b\u52a1\u7684\u7ed3\u675f\uff0c\u4e8b\u52a1\u4e2d\u6240\u6709\u7684\u6d88\u606f\u90fd\u5c06\u88ab\u91cd\u53d1\u3002\u5f53\u7136\u5728 Commit \u4e4b\u524d\u629b\u51fa\u5f02\u5e38\uff0c\u4e5f\u4f1a\u5bfc\u81f4\u4e8b\u52a1\u7684 rollback\u3002<\/p>\n<p><strong><span style=\"font-size: large\">RabbitMQ<\/span><\/strong><\/p>\n<p><strong>\u2460\u751f\u4ea7\u8005\u5f04\u4e22\u4e86\u6570\u636e<\/strong><\/p>\n<p>\u751f\u4ea7\u8005\u5c06\u6570\u636e\u53d1\u9001\u5230 RabbitMQ \u7684\u65f6\u5019\uff0c\u53ef\u80fd\u6570\u636e\u5c31\u5728\u534a\u8def\u7ed9\u641e\u4e22\u4e86\uff0c\u56e0\u4e3a\u7f51\u7edc\u5565\u7684\u95ee\u9898\uff0c\u90fd\u6709\u53ef\u80fd\u3002<\/p>\n<p>\u6b64\u65f6\u53ef\u4ee5\u9009\u62e9\u7528 RabbitMQ \u63d0\u4f9b\u7684\u4e8b\u52a1\u529f\u80fd\uff0c\u5c31\u662f\u751f\u4ea7\u8005\u53d1\u9001\u6570\u636e\u4e4b\u524d\u5f00\u542f RabbitMQ \u4e8b\u52a1(channel.txSelect)\uff0c\u7136\u540e\u53d1\u9001\u6d88\u606f\uff0c\u5982\u679c\u6d88\u606f\u6ca1\u6709\u6210\u529f\u88ab RabbitMQ \u63a5\u6536\u5230\uff0c\u90a3\u4e48\u751f\u4ea7\u8005\u4f1a\u6536\u5230\u5f02\u5e38\u62a5\u9519\u3002<\/p>\n<p>\u6b64\u65f6\u5c31\u53ef\u4ee5\u56de\u6eda\u4e8b\u52a1(channel.txRollback)\uff0c\u7136\u540e\u91cd\u8bd5\u53d1\u9001\u6d88\u606f;\u5982\u679c\u6536\u5230\u4e86\u6d88\u606f\uff0c\u90a3\u4e48\u53ef\u4ee5\u63d0\u4ea4\u4e8b\u52a1(channel.txCommit)\u3002<\/p>\n<p>\u4f46\u662f\u95ee\u9898\u662f\uff0cRabbitMQ \u4e8b\u52a1\u673a\u5236\u4e00\u641e\uff0c\u57fa\u672c\u4e0a\u541e\u5410\u91cf\u4f1a\u4e0b\u6765\uff0c\u56e0\u4e3a\u592a\u8017\u6027\u80fd\u3002<\/p>\n<p>\u6240\u4ee5\u4e00\u822c\u6765\u8bf4\uff0c\u5982\u679c\u8981\u786e\u4fdd RabbitMQ \u7684\u6d88\u606f\u522b\u4e22\uff0c\u53ef\u4ee5\u5f00\u542f Confirm \u6a21\u5f0f\u3002<\/p>\n<p>\u5728\u751f\u4ea7\u8005\u90a3\u91cc\u8bbe\u7f6e\u5f00\u542f Confirm \u6a21\u5f0f\u4e4b\u540e\uff0c\u4f60\u6bcf\u6b21\u5199\u7684\u6d88\u606f\u90fd\u4f1a\u5206\u914d\u4e00\u4e2a&nbsp;id\uff0c\u7136\u540e\u5982\u679c\u5199\u5165\u4e86 RabbitMQ \u4e2d\uff0cRabbitMQ \u4f1a\u7ed9\u4f60\u56de\u4f20\u4e00\u4e2a ACK \u6d88\u606f\uff0c\u544a\u8bc9\u4f60\u8bf4\u8fd9\u4e2a\u6d88\u606f OK \u4e86\u3002<\/p>\n<p>\u5982\u679c RabbitMQ \u6ca1\u80fd\u5904\u7406\u8fd9\u4e2a\u6d88\u606f\uff0c\u4f1a\u56de\u8c03\u4f60\u4e00\u4e2a nack \u63a5\u53e3\uff0c\u544a\u8bc9\u4f60\u8fd9\u4e2a\u6d88\u606f\u63a5\u6536\u5931\u8d25\uff0c\u4f60\u53ef\u4ee5\u91cd\u8bd5\u3002<\/p>\n<p>\u800c\u4e14\u4f60\u53ef\u4ee5\u7ed3\u5408\u8fd9\u4e2a\u673a\u5236\uff0c\u81ea\u5df1\u5728\u5185\u5b58\u91cc\u7ef4\u62a4\u6bcf\u4e2a\u6d88\u606f id \u7684\u72b6\u6001\uff0c\u5982\u679c\u8d85\u8fc7\u4e00\u5b9a\u65f6\u95f4\u8fd8\u6ca1\u63a5\u6536\u5230\u8fd9\u4e2a\u6d88\u606f\u7684\u56de\u8c03\uff0c\u90a3\u4e48\u4f60\u53ef\u4ee5\u91cd\u53d1\u3002<\/p>\n<p>\u4e8b\u52a1\u673a\u5236\u548c Cnofirm \u673a\u5236<span><i>\u7684<\/i><\/span>\u4e0d\u540c\u5728\u4e8e\uff1a\u4e8b\u52a1\u673a\u5236\u662f\u540c\u6b65\u7684\uff0c\u4f60\u63d0\u4ea4\u4e00\u4e2a\u4e8b\u52a1\u4e4b\u540e\u4f1a\u963b\u585e\u5728\u90a3\u513f\u3002<\/p>\n<p>\u4f46\u662f Confirm \u673a\u5236\u662f\u5f02\u6b65\u7684\uff0c\u4f60\u53d1\u9001\u4e2a\u6d88\u606f\u4e4b\u540e\u5c31\u53ef\u4ee5\u53d1\u9001\u4e0b\u4e00\u4e2a\u6d88\u606f\uff0c\u7136\u540e\u90a3\u4e2a\u6d88\u606f RabbitMQ \u63a5\u6536\u4e86\u4e4b\u540e\u4f1a\u5f02\u6b65\u56de\u8c03\u4f60\u4e00\u4e2a\u63a5\u53e3\u901a\u77e5\u4f60\u8fd9\u4e2a\u6d88\u606f\u63a5\u6536\u5230\u4e86\u3002<\/p>\n<p>\u6240\u4ee5\u4e00\u822c\u5728\u751f\u4ea7\u8005\u8fd9\u5757\u907f\u514d\u6570\u636e\u4e22\u5931\uff0c\u90fd\u662f\u7528 Confirm \u673a\u5236\u7684\u3002<\/p>\n<p><strong>\u2461RabbitMQ \u5f04\u4e22\u4e86\u6570\u636e<\/strong><\/p>\n<p>\u5c31\u662f RabbitMQ \u81ea\u5df1\u5f04\u4e22\u4e86\u6570\u636e\uff0c\u8fd9\u4e2a\u4f60\u5fc5\u987b\u5f00\u542f RabbitMQ \u7684\u6301\u4e45\u5316\uff0c\u5c31\u662f\u6d88\u606f\u5199\u5165\u4e4b\u540e\u4f1a\u6301\u4e45\u5316\u5230\u78c1\u76d8\uff0c\u54ea\u6015\u662f RabbitMQ \u81ea\u5df1\u6302\u4e86\uff0c\u6062\u590d\u4e4b\u540e\u4f1a\u81ea\u52a8\u8bfb\u53d6\u4e4b\u524d\u5b58\u50a8\u7684\u6570\u636e\uff0c\u4e00\u822c\u6570\u636e\u4e0d\u4f1a\u4e22\u3002<\/p>\n<p>\u9664\u975e\u6781\u5176\u7f55\u89c1\u7684\u662f\uff0cRabbitMQ \u8fd8\u6ca1\u6301\u4e45\u5316\uff0c\u81ea\u5df1\u5c31\u6302\u4e86\uff0c\u53ef\u80fd\u5bfc\u81f4\u5c11\u91cf\u6570\u636e\u4f1a\u4e22\u5931\u7684\uff0c\u4f46\u662f\u8fd9\u4e2a\u6982\u7387\u8f83\u5c0f\u3002<\/p>\n<p>\u8bbe\u7f6e\u6301\u4e45\u5316\u6709\u4e24\u4e2a\u6b65\u9aa4\uff1a<\/p>\n<ul>\n<li>\u521b\u5efa queue \u548c\u4ea4\u6362\u5668\u7684\u65f6\u5019\u5c06\u5176\u8bbe\u7f6e\u4e3a\u6301\u4e45\u5316\u7684\uff0c\u8fd9\u6837\u5c31\u53ef\u4ee5\u4fdd\u8bc1 RabbitMQ \u6301\u4e45\u5316\u76f8\u5173\u7684\u5143\u6570\u636e\uff0c\u4f46\u662f\u4e0d\u4f1a\u6301\u4e45\u5316 queue \u91cc\u7684\u6570\u636e\u3002<\/li>\n<li>\u53d1\u9001\u6d88\u606f\u7684\u65f6\u5019\u5c06\u6d88\u606f\u7684 deliveryMode \u8bbe\u7f6e\u4e3a 2\uff0c\u5c31\u662f\u5c06\u6d88\u606f\u8bbe\u7f6e\u4e3a\u6301\u4e45\u5316\u7684\uff0c\u6b64\u65f6 RabbitMQ \u5c31\u4f1a\u5c06\u6d88\u606f\u6301\u4e45\u5316\u5230\u78c1\u76d8\u4e0a\u53bb\u3002<\/li>\n<\/ul>\n<p>\u5fc5\u987b\u8981\u540c\u65f6\u8bbe\u7f6e\u8fd9\u4e24\u4e2a\u6301\u4e45\u5316\u624d\u884c\uff0cRabbitMQ \u54ea\u6015\u662f\u6302\u4e86\uff0c\u518d\u6b21\u91cd\u542f\uff0c\u4e5f\u4f1a\u4ece\u78c1\u76d8\u4e0a\u91cd\u542f\u6062\u590d queue\uff0c\u6062\u590d\u8fd9\u4e2a queue \u91cc\u7684\u6570\u636e\u3002<\/p>\n<p>\u800c\u4e14\u6301\u4e45\u5316\u53ef\u4ee5\u8ddf\u751f\u4ea7\u8005\u90a3\u8fb9\u7684 Confirm \u673a\u5236\u914d\u5408\u8d77\u6765\uff0c\u53ea\u6709\u6d88\u606f\u88ab\u6301\u4e45\u5316\u5230\u78c1\u76d8\u4e4b\u540e\uff0c\u624d\u4f1a\u901a\u77e5\u751f\u4ea7\u8005 ACK \u4e86\u3002<\/p>\n<p>\u6240\u4ee5\u54ea\u6015\u662f\u5728\u6301\u4e45\u5316\u5230\u78c1\u76d8\u4e4b\u524d\uff0cRabbitMQ \u6302\u4e86\uff0c\u6570\u636e\u4e22\u4e86\uff0c\u751f\u4ea7\u8005\u6536\u4e0d\u5230 ACK\uff0c\u4f60\u4e5f\u662f\u53ef\u4ee5\u81ea\u5df1\u91cd\u53d1\u7684\u3002<\/p>\n<p>\u54ea\u6015\u662f\u4f60\u7ed9 RabbitMQ \u5f00\u542f\u4e86\u6301\u4e45\u5316\u673a\u5236\uff0c\u4e5f\u6709\u4e00\u79cd\u53ef\u80fd\uff0c\u5c31\u662f\u8fd9\u4e2a\u6d88\u606f\u5199\u5230\u4e86 RabbitMQ \u4e2d\uff0c\u4f46\u662f\u8fd8\u6ca1\u6765\u5f97\u53ca\u6301\u4e45\u5316\u5230\u78c1\u76d8\u4e0a\uff0c\u7ed3\u679c\u4e0d\u5de7\uff0c\u6b64\u65f6 RabbitMQ \u6302\u4e86\uff0c\u5c31\u4f1a\u5bfc\u81f4\u5185\u5b58\u91cc\u7684\u4e00\u70b9\u70b9\u6570\u636e\u4f1a\u4e22\u5931\u3002<\/p>\n<p><strong>\u2462\u6d88\u8d39\u7aef\u5f04\u4e22\u4e86\u6570\u636e<\/strong><\/p>\n<p>RabbitMQ \u5982\u679c\u4e22\u5931\u4e86\u6570\u636e\uff0c\u4e3b\u8981\u662f\u56e0\u4e3a\u4f60\u6d88\u8d39\u7684\u65f6\u5019\uff0c\u521a\u6d88\u8d39\u5230\uff0c\u8fd8\u6ca1\u5904\u7406\uff0c\u7ed3\u679c\u8fdb\u7a0b\u6302\u4e86\uff0c\u6bd4\u5982\u91cd\u542f\u4e86\uff0c\u90a3\u4e48\u5c31\u5c34\u5c2c\u4e86\uff0cRabbitMQ \u8ba4\u4e3a\u4f60\u90fd\u6d88\u8d39\u4e86\uff0c\u8fd9\u6570\u636e\u5c31\u4e22\u4e86\u3002<\/p>\n<p>\u8fd9\u4e2a\u65f6\u5019\u5f97\u7528 RabbitMQ \u63d0\u4f9b\u7684 ACK \u673a\u5236\uff0c\u7b80\u5355\u6765\u8bf4\uff0c\u5c31\u662f\u4f60\u5173\u95ed RabbitMQ \u81ea\u52a8 ACK\uff0c\u53ef\u4ee5\u901a\u8fc7\u4e00\u4e2a API \u6765\u8c03\u7528\u5c31\u884c\uff0c\u7136\u540e\u6bcf\u6b21\u4f60\u81ea\u5df1\u4ee3\u7801\u91cc\u786e\u4fdd\u5904\u7406\u5b8c\u7684\u65f6\u5019\uff0c\u518d\u7a0b\u5e8f\u91cc ACK \u4e00\u628a\u3002<\/p>\n<p>\u8fd9\u6837\u7684\u8bdd\uff0c\u5982\u679c\u4f60\u8fd8\u6ca1\u5904\u7406\u5b8c\uff0c\u4e0d\u5c31\u6ca1\u6709 ACK?\u90a3 RabbitMQ \u5c31\u8ba4\u4e3a\u4f60\u8fd8\u6ca1\u5904\u7406\u5b8c\uff0c\u8fd9\u4e2a\u65f6\u5019 RabbitMQ \u4f1a\u628a\u8fd9\u4e2a\u6d88\u8d39\u5206\u914d\u7ed9\u522b\u7684 Consumer \u53bb\u5904\u7406\uff0c\u6d88\u606f\u662f\u4e0d\u4f1a\u4e22\u7684\u3002<\/p>\n<p><strong><span style=\"font-size: large\">Kafka<\/span><\/strong><\/p>\n<p><strong>\u2460\u6d88\u8d39\u7aef\u5f04\u4e22\u4e86\u6570\u636e<\/strong><\/p>\n<p><span><i>\u53ea\u6709\u4e00\u4e2a<\/i><\/span>\u53ef\u80fd\u5bfc\u81f4\u6d88\u8d39\u8005\u5f04\u4e22\u6570\u636e\u7684\u60c5\u51b5\uff0c\u5c31\u662f\u8bf4\uff0c\u4f60\u90a3\u4e2a\u6d88\u8d39\u5230\u4e86\u8fd9\u4e2a\u6d88\u606f\uff0c\u7136\u540e\u6d88\u8d39\u8005\u90a3\u8fb9\u81ea\u52a8\u63d0\u4ea4\u4e86 Offset\uff0c\u8ba9 Kafka \u4ee5\u4e3a\u4f60\u5df2\u7ecf\u6d88\u8d39\u597d\u4e86\u8fd9\u4e2a\u6d88\u606f\u3002<\/p>\n<p>\u5176\u5b9e\u4f60\u521a\u51c6\u5907\u5904\u7406\u8fd9\u4e2a\u6d88\u606f\uff0c\u4f60\u8fd8\u6ca1\u5904\u7406\uff0c\u4f60\u81ea\u5df1\u5c31\u6302\u4e86\uff0c\u6b64\u65f6\u8fd9\u6761\u6d88\u606f\u5c31\u4e22\u54af\u3002<\/p>\n<p>\u5927\u5bb6\u90fd\u77e5\u9053 Kafka \u4f1a\u81ea\u52a8\u63d0\u4ea4 Offset\uff0c\u90a3\u4e48\u53ea\u8981\u5173\u95ed\u81ea\u52a8\u63d0\u4ea4 Offset\uff0c\u5728\u5904\u7406\u5b8c\u4e4b\u540e\u81ea\u5df1\u624b\u52a8\u63d0\u4ea4 Offset\uff0c\u5c31\u53ef\u4ee5\u4fdd\u8bc1\u6570\u636e\u4e0d\u4f1a\u4e22\u3002<\/p>\n<p>\u4f46\u662f\u6b64\u65f6\u786e\u5b9e\u8fd8\u662f\u4f1a\u91cd\u590d\u6d88\u8d39\uff0c\u6bd4\u5982\u4f60\u521a\u5904\u7406\u5b8c\uff0c\u8fd8\u6ca1\u63d0\u4ea4 Offset\uff0c\u7ed3\u679c\u81ea\u5df1\u6302\u4e86\uff0c\u6b64\u65f6\u80af\u5b9a\u4f1a\u91cd\u590d\u6d88\u8d39\u4e00\u6b21\uff0c\u81ea\u5df1\u4fdd\u8bc1\u5e42\u7b49\u6027\u5c31\u597d\u4e86\u3002<\/p>\n<p>\u751f\u4ea7\u73af\u5883\u78b0\u5230\u7684\u4e00\u4e2a\u95ee\u9898\uff0c\u5c31\u662f\u8bf4\u6211\u4eec\u7684 Kafka \u6d88\u8d39\u8005\u6d88\u8d39\u5230\u4e86\u6570\u636e\u4e4b\u540e\u662f\u5199\u5230\u4e00\u4e2a\u5185\u5b58\u7684 queue \u91cc\u5148\u7f13\u51b2\u4e00\u4e0b\uff0c\u7ed3\u679c\u6709\u7684\u65f6\u5019\uff0c\u4f60\u521a\u628a\u6d88\u606f\u5199\u5165\u5185\u5b58 queue\uff0c\u7136\u540e\u6d88\u8d39\u8005\u4f1a\u81ea\u52a8\u63d0\u4ea4 Offset\u3002<\/p>\n<p>\u7136\u540e\u6b64\u65f6\u6211\u4eec\u91cd\u542f\u4e86\u7cfb\u7edf\uff0c\u5c31\u4f1a\u5bfc\u81f4\u5185\u5b58 queue \u91cc\u8fd8\u6ca1\u6765\u5f97\u53ca\u5904\u7406\u7684\u6570\u636e\u5c31\u4e22\u5931\u4e86\u3002<\/p>\n<p><strong>\u2461Kafka \u5f04\u4e22\u4e86\u6570\u636e<\/strong><\/p>\n<p>\u8fd9\u5757\u6bd4\u8f83\u5e38\u89c1\u7684\u4e00\u4e2a\u573a\u666f\uff0c\u5c31\u662f Kafka \u67d0\u4e2a Broker \u5b95\u673a\uff0c\u7136\u540e\u91cd\u65b0\u9009\u4e3e Partition \u7684 Leader \u65f6\u3002<\/p>\n<p>\u5927\u5bb6\u60f3\u60f3\uff0c\u8981\u662f\u6b64\u65f6\u5176\u4ed6\u7684 Follower \u521a\u597d\u8fd8\u6709\u4e9b\u6570\u636e\u6ca1\u6709\u540c\u6b65\uff0c\u7ed3\u679c\u6b64\u65f6 Leader \u6302\u4e86\uff0c\u7136\u540e\u9009\u4e3e\u67d0\u4e2a Follower \u6210 Leader \u4e4b\u540e\uff0c\u4ed6\u4e0d\u5c31\u5c11\u4e86\u4e00\u4e9b\u6570\u636e?\u8fd9\u5c31\u4e22\u4e86\u4e00\u4e9b\u6570\u636e\u554a\u3002<\/p>\n<p>\u6240\u4ee5\u6b64\u65f6\u4e00\u822c\u662f\u8981\u6c42\u8d77\u7801\u8bbe\u7f6e\u5982\u4e0b\u56db\u4e2a\u53c2\u6570\uff1a<\/p>\n<ul>\n<li>\u7ed9\u8fd9\u4e2a Topic \u8bbe\u7f6e replication.factor \u53c2\u6570\uff1a\u8fd9\u4e2a\u503c\u5fc5\u987b\u5927\u4e8e 1\uff0c\u8981\u6c42\u6bcf\u4e2a Partition \u5fc5\u987b\u6709\u81f3\u5c11 2 \u4e2a\u526f\u672c\u3002<\/li>\n<li>\u5728 Kafka \u670d\u52a1\u7aef\u8bbe\u7f6e min.insync.replicas \u53c2\u6570\uff1a\u8fd9\u4e2a\u503c\u5fc5\u987b\u5927\u4e8e 1\uff0c\u8fd9\u4e2a\u662f\u8981\u6c42\u4e00\u4e2a Leader \u81f3\u5c11\u611f\u77e5\u5230\u6709\u81f3\u5c11\u4e00\u4e2a Follower \u8fd8\u8ddf\u81ea\u5df1\u4fdd\u6301\u8054\u7cfb\uff0c\u6ca1\u6389\u961f\uff0c\u8fd9\u6837\u624d\u80fd\u786e\u4fdd Leader \u6302\u4e86\u8fd8\u6709\u4e00\u4e2a Follower \u5427\u3002<\/li>\n<li>\u5728 Producer \u7aef\u8bbe\u7f6e acks=all\uff1a\u8fd9\u4e2a\u662f\u8981\u6c42\u6bcf\u6761\u6570\u636e\uff0c\u5fc5\u987b\u662f\u5199\u5165\u6240\u6709 Replica \u4e4b\u540e\uff0c\u624d\u80fd\u8ba4\u4e3a\u662f\u5199\u6210\u529f\u4e86\u3002<\/li>\n<li>\u5728 Producer \u7aef\u8bbe\u7f6e retries=MAX(\u5f88\u5927\u5f88\u5927\u5f88\u5927\u7684\u4e00\u4e2a\u503c\uff0c<span><i>\u53cd\u590d<\/i><\/span>\u91cd\u8bd5\u7684\u610f\u601d)\uff1a\u8fd9\u4e2a\u662f\u8981\u6c42\u4e00\u65e6\u5199\u5165\u5931\u8d25\uff0c\u5c31<span><i>\u5faa\u73af<\/i><\/span>\u91cd\u8bd5\uff0c\u5361\u5728\u8fd9\u91cc\u4e86\u3002<\/li>\n<\/ul>\n<p><strong>\u2462\u751f\u4ea7\u8005\u4f1a\u4e0d\u4f1a\u5f04\u4e22\u6570\u636e<\/strong><\/p>\n<p>\u5982\u679c\u6309\u7167\u4e0a\u8ff0\u7684\u601d\u8def\u8bbe\u7f6e\u4e86 ack=all\uff0c\u4e00\u5b9a\u4e0d\u4f1a\u4e22\uff0c\u8981\u6c42\u662f\uff0c\u4f60\u7684 Leader \u63a5\u6536\u5230\u6d88\u606f\uff0c\u6240\u6709\u7684 Follower \u90fd\u540c\u6b65\u5230\u4e86\u6d88\u606f\u4e4b\u540e\uff0c\u624d\u8ba4\u4e3a\u672c\u6b21\u5199\u6210\u529f\u4e86\u3002\u5982\u679c\u6ca1\u6ee1\u8db3\u8fd9\u4e2a\u6761\u4ef6\uff0c\u751f\u4ea7\u8005\u4f1a\u81ea\u52a8\u4e0d\u65ad\u7684\u91cd\u8bd5\uff0c\u91cd\u8bd5\u65e0\u6570\u6b21\u3002<\/p>\n<p><strong><span style=\"font-size: x-large\">\u6d88\u606f\u7684\u987a\u5e8f\u6027<\/span><\/strong><\/p>\n<p>\u4ece\u6839\u672c\u4e0a\u8bf4\uff0c\u5f02\u6b65\u6d88\u606f\u662f\u4e0d\u5e94\u8be5\u6709\u987a\u5e8f\u4f9d\u8d56\u7684\uff0c\u5728 MQ \u4e0a\u4f30\u8ba1\u662f\u6ca1\u6cd5\u89e3\u51b3\u3002<\/p>\n<p>\u8981\u5b9e\u73b0\u4e25\u683c\u7684\u987a\u5e8f\u6d88\u606f\uff0c\u7b80\u5355\u4e14\u53ef\u884c\u7684\u529e\u6cd5\u5c31\u662f\uff1a\u4fdd\u8bc1\u751f\u4ea7\u8005\u3001MQServer\u3001\u6d88\u8d39\u8005\u662f\u4e00\u5bf9\u4e00\u5bf9\u4e00\u7684\u5173\u7cfb\u3002<\/p>\n<p><strong><span style=\"font-size: large\">ActiveMQ<\/span><\/strong><\/p>\n<p><strong>\u2460\u901a\u8fc7\u9ad8\u7ea7\u7279\u6027 Consumer \u72ec\u6709\u6d88\u8d39\u8005(exclusive consumer)<\/strong><\/p>\n<pre>\n \n \n \n <ol>\n  \n  \n  \n  <li>queue&nbsp;=&nbsp;new&nbsp;ActiveMQQueue(<span>\"TEST.QUEUE?consumer.exclusive=true\"<\/span>);&nbsp;<\/li>\n  \n  \n  \n  <li>consumer&nbsp;=&nbsp;session.createConsumer(queue);&nbsp;<\/li>\n \n \n \n <\/ol><\/pre>\n<p>\u5f53\u5728\u63a5\u6536\u4fe1\u606f\u7684\u65f6\u5019\uff0c\u6709\u591a\u4e2a\u72ec\u5360\u6d88\u8d39\u8005\u7684\u65f6\u5019\uff0c\u53ea\u6709\u4e00\u4e2a\u72ec\u5360\u6d88\u8d39\u8005\u53ef\u4ee5\u63a5\u6536\u5230\u6d88\u606f\u3002<\/p>\n<p>\u72ec\u5360\u6d88\u606f\u5c31\u662f\u5728\u6709\u591a\u4e2a\u6d88\u8d39\u8005\u540c\u65f6\u6d88\u8d39\u4e00\u4e2a queue \u65f6\uff0c\u53ef\u4ee5\u4fdd\u8bc1\u53ea\u6709\u4e00\u4e2a\u6d88\u8d39\u8005\u53ef\u4ee5\u6d88\u8d39\u6d88\u606f\u3002<\/p>\n<p>\u8fd9\u6837\u867d\u7136\u4fdd\u8bc1\u4e86\u6d88\u606f\u7684\u987a\u5e8f\u95ee\u9898\uff0c\u4e0d\u8fc7\u4e5f\u5e26\u6765\u4e86\u4e00\u4e2a\u95ee\u9898\uff0c\u5c31\u662f\u8fd9\u4e2a queue \u7684\u6240\u6709\u6d88\u606f\u5c06\u53ea\u4f1a\u5728\u8fd9\u4e00\u4e2a\u4e3b\u6d88\u8d39\u8005\u4e0a\u6d88\u8d39\uff0c\u5176\u4ed6\u6d88\u8d39\u8005\u5c06\u95f2\u7f6e\uff0c\u8fbe\u4e0d\u5230\u8d1f\u8f7d\u5747\u8861\u5206\u914d\u3002<\/p>\n<p>\u800c\u5b9e\u9645\u4e1a\u52a1\u6211\u4eec\u53ef\u80fd\u66f4\u591a\u7684\u662f\u8fd9\u6837\u7684\u573a\u666f\uff0c\u6bd4\u5982\u4e00\u4e2a\u8ba2\u5355\u4f1a\u53d1\u51fa\u4e00\u7ec4\u987a\u5e8f\u6d88\u606f\uff0c\u6211\u4eec\u53ea\u8981\u6c42\u8fd9\u4e00\u7ec4\u6d88\u606f\u662f\u987a\u5e8f\u6d88\u8d39\u7684\uff0c\u800c\u8ba2\u5355\u4e0e\u8ba2\u5355\u4e4b\u95f4\u53c8\u662f\u53ef\u4ee5\u5e76\u884c\u6d88\u8d39\u7684\uff0c\u4e0d\u9700\u8981\u987a\u5e8f\uff0c\u56e0\u4e3a\u987a\u5e8f\u4e5f\u6ca1\u6709\u4efb\u4f55\u610f\u4e49\u3002<\/p>\n<p>\u6709\u6ca1\u6709\u529e\u6cd5\u505a\u5230\u5462?\u53ef\u4ee5\u5229\u7528 ActiveMQ \u7684\u53e6\u4e00\u4e2a\u9ad8\u7ea7\u7279\u6027\u4e4b messageGroup\u3002<\/p>\n<p><strong>\u2461\u5229\u7528 ActiveMQ \u7684\u9ad8\u7ea7\u7279\u6027\uff1aMessage Groups<\/strong><\/p>\n<p>Message Groups \u7279\u6027\u662f\u4e00\u79cd\u8d1f\u8f7d\u5747\u8861\u7684\u673a\u5236\u3002\u5728\u4e00\u4e2a\u6d88\u606f\u88ab\u5206\u53d1\u5230 Consumer \u4e4b\u524d\uff0cBroker \u9996\u5148\u68c0\u67e5\u6d88\u606f JMSXGroupID \u5c5e\u6027\u3002<\/p>\n<p>\u5982\u679c\u5b58\u5728\uff0c\u90a3\u4e48 Broker \u4f1a\u68c0\u67e5\u662f\u5426\u6709\u67d0\u4e2a Consumer \u62e5\u6709\u8fd9\u4e2a Message Group\u3002<\/p>\n<p>\u5982\u679c\u6ca1\u6709\uff0c\u90a3\u4e48 Broker \u4f1a\u9009\u62e9\u4e00\u4e2a Consumer\uff0c\u5e76\u5c06\u5b83\u5173\u8054\u5230\u8fd9\u4e2a Message Group\u3002<\/p>\n<p>\u6b64\u540e\uff0c\u8fd9\u4e2a Consumer \u4f1a\u63a5\u6536\u8fd9\u4e2a Message Group \u7684\u6240\u6709\u6d88\u606f\uff0c\u76f4\u5230 Consumer \u88ab\u5173\u95ed\u3002<\/p>\n<p>Message Group \u88ab\u5173\u95ed\uff0c\u901a\u8fc7\u53d1\u9001\u4e00\u4e2a\u6d88\u606f\uff0c\u5e76\u8bbe\u7f6e\u8fd9\u4e2a\u6d88\u606f\u7684 JMSXGroupSeq \u4e3a -1\u3002<\/p>\n<pre>\n \n \n \n <ol>\n  \n  \n  \n  <li>bytesMessage.setStringProperty(<span>\"JMSXGroupID\"<\/span>,&nbsp;<span>\"constact-20100000002\"<\/span>);&nbsp;<\/li>\n  \n  \n  \n  <li>bytesMessage.setIntProperty(<span>\"JMSXGroupSeq\"<\/span>,&nbsp;-1);&nbsp;<\/li>\n \n \n \n <\/ol><\/pre>\n<p>\u5982\u4e0a\u56fe\u6240\u793a\uff0c\u540c\u4e00\u4e2a queue \u4e2d\uff0c\u62e5\u6709\u76f8\u540c JMSXGroupID \u7684\u6d88\u606f\u5c06\u53d1\u5f80\u540c\u4e00\u4e2a\u6d88\u8d39\u8005\uff0c\u89e3\u51b3\u987a\u5e8f\u95ee\u9898;\u4e0d\u540c\u5206\u7ec4\u7684\u6d88\u606f\u53c8\u80fd\u88ab\u5176\u4ed6\u6d88\u8d39\u8005\u5e76\u884c\u6d88\u8d39\uff0c\u89e3\u51b3\u8d1f\u8f7d\u5747\u8861\u7684\u95ee\u9898\u3002<\/p>\n<p><strong><span style=\"font-size: large\">RabbitMQ<\/span><\/strong><\/p>\n<p>\u5982\u679c\u6709\u987a\u5e8f\u4f9d\u8d56\u7684\u6d88\u606f\uff0c\u8981\u4fdd\u8bc1\u6d88\u606f\u6709\u4e00\u4e2a hashKey\uff0c\u7c7b\u4f3c\u4e8e\u6570\u636e\u5e93\u8868\u5206\u533a\u7684\u7684\u5206\u533a key \u5217\u3002\u4fdd\u8bc1\u5bf9\u540c\u4e00\u4e2a key \u7684\u6d88\u606f\u53d1\u9001\u5230\u76f8\u540c\u7684\u961f\u5217\u3002<\/p>\n<p>A \u7528\u6237\u4ea7\u751f\u7684\u6d88\u606f(\u5305\u62ec\u521b\u5efa\u6d88\u606f\u548c\u5220\u9664\u6d88\u606f)\u90fd\u6309 A \u7684 hashKey \u5206\u53d1\u5230\u540c\u4e00\u4e2a\u961f\u5217\u3002<\/p>\n<p>\u53ea\u9700\u8981\u628a\u5f3a\u76f8\u5173\u7684\u4e24\u6761\u6d88\u606f\u57fa\u4e8e\u76f8\u540c\u7684\u8def\u7531\u5c31\u884c\u4e86\uff0c\u4e5f\u5c31\u662f\u8bf4\u7ecf\u8fc7 m1 \u548c m2 \u7684\u5728\u8def\u7531\u8868\u91cc\u7684\u8def\u7531\u662f\u4e00\u6837\u7684\uff0c\u90a3\u81ea\u7136 m1 \u4f1a\u4f18\u5148\u4e8e m2 \u53bb\u6295\u9012\u3002\u800c\u4e14\u4e00\u4e2a queue \u53ea\u5bf9\u5e94\u4e00\u4e2a Consumer\u3002<\/p>\n<p><strong><span style=\"font-size: large\">Kafka<\/span><\/strong><\/p>\n<p>\u4e00\u4e2a Topic\uff0c\u4e00\u4e2a Partition\uff0c\u4e00\u4e2a Consumer\uff0c\u5185\u90e8\u5355\u7ebf\u7a0b\u6d88\u8d39\u3002<\/p>\n<p>\u5982\u4f55\u89e3\u51b3\u6d88\u606f\u961f\u5217\u7684\u5ef6\u65f6\u4ee5\u53ca\u8fc7\u671f\u5931\u6548\u95ee\u9898?RabbitMQ \u662f\u53ef\u4ee5\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4\u7684\uff0c\u5c31\u662f TTL\u3002<\/p>\n<p>\u5982\u679c\u6d88\u606f\u5728 queue \u4e2d\u79ef\u538b\u8d85\u8fc7\u4e00\u5b9a\u7684\u65f6\u95f4\uff0c\u800c\u53c8\u6ca1\u6709\u8bbe\u7f6e\u6b7b\u4fe1\u961f\u5217\u673a\u5236\uff0c\u5c31\u4f1a\u88ab RabbitMQ \u7ed9\u6e05\u7406\u6389\uff0c\u8fd9\u4e2a\u6570\u636e\u5c31\u6ca1\u4e86\u3002ActiveMQ \u5219\u901a\u8fc7\u66f4\u6539\u914d\u7f6e\uff0c\u652f\u6301\u6d88\u606f\u7684\u5b9a\u65f6\u53d1\u9001\u3002<\/p>\n<p><strong><span style=\"font-size: x-large\">\u6709\u51e0\u767e\u4e07\u6d88\u606f\u6301\u7eed\u79ef\u538b\u51e0\u5c0f\u65f6\u600e\u4e48\u89e3\u51b3?<\/span><\/strong><\/p>\n<p>\u53d1\u751f\u4e86\u7ebf\u4e0a\u6545\u969c\uff0c\u51e0\u5343\u4e07\u6761\u6570\u636e\u5728 MQ \u91cc\u79ef\u538b\u5f88\u4e45\u3002\u662f\u4fee\u590d Consumer \u7684\u95ee\u9898\uff0c\u8ba9\u4ed6\u6062\u590d\u6d88\u8d39\u901f\u5ea6\uff0c\u7136\u540e\u7b49\u5f85\u51e0\u4e2a\u5c0f\u65f6\u6d88\u8d39\u5b8c\u6bd5?\u8fd9\u662f\u4e2a\u89e3\u51b3\u65b9\u6848\uff0c\u4e0d\u8fc7\u6709\u65f6\u5019\u6211\u4eec\u8fd8\u4f1a\u8fdb\u884c\u4e34\u65f6\u7d27\u6025\u6269\u5bb9\u3002<\/p>\n<p>\u4e00\u4e2a\u6d88\u8d39\u8005\u4e00\u79d2\u662f 1000 \u6761\uff0c3 \u4e2a\u6d88\u8d39\u8005\u4e00\u79d2\u662f 3000 \u6761\uff0c\u4e00\u5206\u949f\u662f 18 \u4e07\u6761\u3002<\/p>\n<p>\u6240\u4ee5\u5982\u679c\u79ef\u538b\u4e86\u51e0\u767e\u4e07\u5230\u4e0a\u5343\u4e07\u7684\u6570\u636e\uff0c\u5373\u4f7f\u6d88\u8d39\u8005\u6062\u590d\u4e86\uff0c\u4e5f\u9700\u8981\u5927\u6982\u4e00\u5c0f\u65f6\u7684\u65f6\u95f4\u624d\u80fd\u6062\u590d\u8fc7\u6765\u3002<\/p>\n<p>\u4e00\u822c\u8fd9\u4e2a\u65f6\u5019\uff0c\u53ea\u80fd\u64cd\u4f5c\u4e34\u65f6\u7d27\u6025\u6269\u5bb9\u4e86\uff0c\u5177\u4f53\u64cd\u4f5c\u6b65\u9aa4\u548c\u601d\u8def\u5982\u4e0b\uff1a<\/p>\n<ul>\n<li>\u5148\u4fee\u590d Consumer \u7684\u95ee\u9898\uff0c\u786e\u4fdd\u5176\u6062\u590d\u6d88\u8d39\u901f\u5ea6\uff0c\u7136\u540e\u5c06\u73b0\u6709 Consumer \u90fd\u505c\u6389\u3002<\/li>\n<li>\u65b0\u5efa\u4e00\u4e2a Topic\uff0cPartition \u662f\u539f\u6765\u7684 10 \u500d\uff0c\u4e34\u65f6\u5efa\u7acb\u597d\u539f\u5148 10 \u500d\u6216\u8005 20 \u500d\u7684 queue \u6570\u91cf\u3002<\/li>\n<\/ul>\n<p style=\"margin-left: 40px\">\u7136\u540e\u5199\u4e00\u4e2a\u4e34\u65f6\u7684\u5206\u53d1\u6570\u636e\u7684 Consumer \u7a0b\u5e8f\uff0c\u8fd9\u4e2a\u7a0b\u5e8f\u90e8\u7f72\u4e0a\u53bb\u6d88\u8d39\u79ef\u538b\u7684\u6570\u636e\uff0c\u6d88\u8d39\u4e4b\u540e\u4e0d\u505a\u8017\u65f6\u7684\u5904\u7406\uff0c\u76f4\u63a5\u5747\u5300\u8f6e\u8be2\u5199\u5165\u4e34\u65f6\u5efa\u7acb\u597d\u7684 10 \u500d\u6570\u91cf\u7684 queue\u3002<\/p>\n<ul>\n<li>\u63a5\u7740\u4e34\u65f6\u5f81\u7528 10 \u500d\u7684\u673a\u5668\u6765\u90e8\u7f72 Consumer\uff0c\u6bcf\u4e00\u6279 Consumer \u6d88\u8d39\u4e00\u4e2a\u4e34\u65f6 queue \u7684\u6570\u636e\u3002<\/li>\n<li>\u8fd9\u79cd\u505a\u6cd5\u76f8\u5f53\u4e8e\u662f\u4e34\u65f6\u5c06 queue \u8d44\u6e90\u548c Consumer \u8d44\u6e90\u6269\u5927 10 \u500d\uff0c\u4ee5\u6b63\u5e38\u7684 10 \u500d\u901f\u5ea6\u6765\u6d88\u8d39\u6570\u636e\u3002<\/li>\n<li>\u7b49\u5feb\u901f\u6d88\u8d39\u5b8c\u79ef\u538b\u6570\u636e\u4e4b\u540e\uff0c\u518d\u6062\u590d\u539f\u5148\u90e8\u7f72\u67b6\u6784\uff0c\u91cd\u65b0\u7528\u539f\u5148\u7684 Consumer \u673a\u5668\u6765\u6d88\u8d39\u6d88\u606f\u3002<\/li>\n<\/ul>\n<p><strong><span style=\"font-size: x-large\">Kafka\u662f\u5982\u4f55\u5b9e\u73b0\u9ad8\u6027\u80fd\u7684?<\/span><\/strong><\/p>\n<p><strong>\u2460\u5b8f\u89c2\u67b6\u6784\u5c42\u9762\u5229\u7528 Partition \u5b9e\u73b0\u5e76\u884c\u5904\u7406<\/strong><\/p>\n<p>Kafka \u4e2d\u6bcf\u4e2a Topic \u90fd\u5305\u542b\u4e00\u4e2a\u6216\u591a\u4e2a Partition\uff0c\u4e0d\u540c Partition \u53ef\u4f4d\u4e8e\u4e0d\u540c\u8282\u70b9\u3002<\/p>\n<p>\u540c\u65f6 Partition \u5728\u7269\u7406\u4e0a\u5bf9\u5e94\u4e00\u4e2a\u672c\u5730\u6587\u4ef6\u5939\uff0c\u6bcf\u4e2a Partition \u5305\u542b\u4e00\u4e2a\u6216\u591a\u4e2a Segment\uff0c\u6bcf\u4e2a Segment \u5305\u542b\u4e00\u4e2a\u6570\u636e\u6587\u4ef6\u548c\u4e00\u4e2a\u4e0e\u4e4b\u5bf9\u5e94\u7684\u7d22\u5f15\u6587\u4ef6\u3002<\/p>\n<p>\u5728\u903b\u8f91\u4e0a\uff0c\u53ef\u4ee5\u628a\u4e00\u4e2a Partition \u5f53\u4f5c\u4e00\u4e2a\u975e\u5e38\u957f\u7684\u6570\u7ec4\uff0c\u53ef\u901a\u8fc7\u8fd9\u4e2a\u201c\u6570\u7ec4\u201d\u7684\u7d22\u5f15(Offset)\u53bb\u8bbf\u95ee\u5176\u6570\u636e\u3002<\/p>\n<p>\u4e00\u65b9\u9762\uff0c\u7531\u4e8e\u4e0d\u540c Partition \u53ef\u4f4d\u4e8e\u4e0d\u540c\u673a\u5668\uff0c\u56e0\u6b64\u53ef\u4ee5\u5145\u5206\u5229\u7528\u96c6\u7fa4\u4f18\u52bf\uff0c\u5b9e\u73b0\u673a\u5668\u95f4\u7684\u5e76\u884c\u5904\u7406\u3002<\/p>\n<p>\u53e6\u4e00\u65b9\u9762\uff0c\u7531\u4e8e Partition \u5728\u7269\u7406\u4e0a\u5bf9\u5e94\u4e00\u4e2a\u6587\u4ef6\u5939\uff0c\u5373\u4f7f\u591a\u4e2a Partition \u4f4d\u4e8e\u540c\u4e00\u4e2a\u8282\u70b9\uff0c\u4e5f\u53ef\u901a\u8fc7\u914d\u7f6e\u8ba9\u540c\u4e00\u8282\u70b9\u4e0a\u7684\u4e0d\u540c Partition \u7f6e\u4e8e\u4e0d\u540c\u7684 disk drive \u4e0a\uff0c\u4ece\u800c\u5b9e\u73b0\u78c1\u76d8\u95f4\u7684\u5e76\u884c\u5904\u7406\uff0c\u5145\u5206\u53d1\u6325\u591a\u78c1\u76d8\u7684\u4f18\u52bf\u3002<\/p>\n<p>\u5229\u7528\u591a\u78c1\u76d8\u7684\u5177\u4f53\u65b9\u6cd5\u662f\uff0c\u5c06\u4e0d\u540c\u78c1\u76d8 mount \u5230\u4e0d\u540c\u76ee\u5f55\uff0c\u7136\u540e\u5728 server.properties \u4e2d\uff0c\u5c06 log.dirs \u8bbe\u7f6e\u4e3a\u591a\u76ee\u5f55(\u7528\u9017\u53f7\u5206\u9694)\u3002<\/p>\n<p>Kafka \u4f1a\u81ea\u52a8\u5c06\u6240\u6709 Partition \u5c3d\u53ef\u80fd\u5747\u5300\u5206\u914d\u5230\u4e0d\u540c\u76ee\u5f55\u4e5f\u5373\u4e0d\u540c\u76ee\u5f55(\u4e5f\u5373\u4e0d\u540c disk)\u4e0a\u3002<\/p>\n<p>Partition \u662f\u6700\u5c0f\u5e76\u53d1\u7c92\u5ea6\uff0cPartition \u4e2a\u6570\u51b3\u5b9a\u4e86\u53ef\u80fd\u7684\u5e76\u884c\u5ea6\u3002<\/p>\n<p><strong>\u2461ISR \u5b9e\u73b0\u53ef\u7528\u6027\u4e0e\u6570\u636e\u4e00\u81f4\u6027\u7684\u52a8\u6001\u5e73\u8861<\/strong><\/p>\n<p>\u5e38\u7528\u6570\u636e\u590d\u5236\u53ca\u4e00\u81f4\u6027\u65b9\u6848\u6709\u5982\u4e0b\u51e0\u79cd\uff1a<\/p>\n<p>Master-Slave\uff1a<\/p>\n<ul>\n<li>RDBMS \u7684\u8bfb\u5199\u5206\u79bb\u5373\u4e3a\u5178\u578b\u7684 Master-Slave \u65b9\u6848\u3002<\/li>\n<li>\u540c\u6b65\u590d\u5236\u53ef\u4fdd\u8bc1\u5f3a\u4e00\u81f4\u6027\u4f46\u4f1a\u5f71\u54cd\u53ef\u7528\u6027\u3002<\/li>\n<li>\u5f02\u6b65\u590d\u5236\u53ef\u63d0\u4f9b\u9ad8\u53ef\u7528\u6027\u4f46\u4f1a\u964d\u4f4e\u4e00\u81f4\u6027\u3002<\/li>\n<\/ul>\n<p>WNR\uff1a<\/p>\n<ul>\n<li>\u4e3b\u8981\u7528\u4e8e\u53bb\u4e2d\u5fc3\u5316\u7684\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e2d\u3002<\/li>\n<li>N \u4ee3\u8868\u603b\u526f\u672c\u6570\uff0cW \u4ee3\u8868\u6bcf\u6b21\u5199\u64cd\u4f5c\u8981\u4fdd\u8bc1\u7684\u6700\u5c11\u5199\u6210\u529f\u7684\u526f\u672c\u6570\uff0cR \u4ee3\u8868\u6bcf\u6b21\u8bfb\u81f3\u5c11\u8981\u8bfb\u53d6\u7684\u526f\u672c\u6570\u3002<\/li>\n<li>\u5f53 W+R&gt;N \u65f6\uff0c\u53ef\u4fdd\u8bc1\u6bcf\u6b21\u8bfb\u53d6\u7684\u6570\u636e\u81f3\u5c11\u6709\u4e00\u4e2a\u526f\u672c\u62e5\u6709\u65b0\u7684\u6570\u636e\u3002<\/li>\n<li>\u591a\u4e2a\u5199\u64cd\u4f5c\u7684\u987a\u5e8f\u96be\u4ee5\u4fdd\u8bc1\uff0c\u53ef\u80fd\u5bfc\u81f4\u591a\u526f\u672c\u95f4\u7684\u5199\u64cd\u4f5c\u987a\u5e8f\u4e0d\u4e00\u81f4\u3002Dynamo \u901a\u8fc7\u5411\u91cf\u65f6\u949f\u4fdd\u8bc1\u6700\u7ec8\u4e00\u81f4\u6027\u3002<\/li>\n<\/ul>\n<p>Paxos \u53ca\u5176\u53d8\u79cd\uff1a<\/p>\n<ul>\n<li>Google \u7684 Chubby\uff0cZookeeper \u7684\u539f\u5b50\u5e7f\u64ad\u534f\u8bae(Zab)\uff0cRAFT \u7b49\u3002<\/li>\n<\/ul>\n<p>\u57fa\u4e8e ISR \u7684\u6570\u636e\u590d\u5236\u65b9\u6848\uff1aKafka \u7684\u6570\u636e\u590d\u5236\u662f\u4ee5 Partition \u4e3a\u5355\u4f4d\u7684\u3002\u800c\u591a\u4e2a\u5907\u4efd\u95f4\u7684\u6570\u636e\u590d\u5236\uff0c\u901a\u8fc7 Follower \u5411 Leader \u62c9\u53d6\u6570\u636e\u5b8c\u6210\u3002<\/p>\n<p>\u4ece\u8fd9\u4e00\u70b9\u6765\u8bb2\uff0cKafka \u7684\u6570\u636e\u590d\u5236\u65b9\u6848\u63a5\u8fd1\u4e8e\u4e0a\u6587\u6240\u8bb2\u7684 Master-Slave \u65b9\u6848\u3002<\/p>\n<p>\u4e0d\u540c\u7684\u662f\uff0cKafka \u65e2\u4e0d\u662f\u5b8c\u5168\u7684\u540c\u6b65\u590d\u5236\uff0c\u4e5f\u4e0d\u662f\u5b8c\u5168\u7684\u5f02\u6b65\u590d\u5236\uff0c\u800c\u662f\u57fa\u4e8e ISR \u7684\u52a8\u6001\u590d\u5236\u65b9\u6848\u3002<\/p>\n<p>ISR\uff0c\u4e5f\u5373 In-Sync Replica\u3002\u6bcf\u4e2a Partition \u7684 Leader \u90fd\u4f1a\u7ef4\u62a4\u8fd9\u6837\u4e00\u4e2a\u5217\u8868\uff0c\u8be5\u5217\u8868\u4e2d\uff0c\u5305\u542b\u4e86\u6240\u6709\u4e0e\u4e4b\u540c\u6b65\u7684 Replica(\u5305\u542b Leader \u81ea\u5df1)\u3002<\/p>\n<p>\u6bcf\u6b21\u6570\u636e\u5199\u5165\u65f6\uff0c\u53ea\u6709 ISR \u4e2d\u7684\u6240\u6709 Replica \u90fd\u590d\u5236\u5b8c\uff0cLeader \u624d\u4f1a\u5c06\u5176\u7f6e\u4e3a Commit\uff0c\u5b83\u624d\u80fd\u88ab Consumer \u6240\u6d88\u8d39\u3002<\/p>\n<p>\u8fd9\u79cd\u65b9\u6848\uff0c\u4e0e\u540c\u6b65\u590d\u5236\u975e\u5e38\u63a5\u8fd1\u3002\u4f46\u4e0d\u540c\u7684\u662f\uff0c\u8fd9\u4e2a ISR \u662f\u7531 Leader \u52a8\u6001\u7ef4\u62a4\u7684\u3002<\/p>\n<p>\u5982\u679c Follower \u4e0d\u80fd\u7d27\u201c\u8ddf\u4e0a\u201dLeader\uff0c\u5b83\u5c06\u88ab Leader \u4ece ISR \u4e2d\u79fb\u9664\uff0c\u5f85\u5b83\u53c8\u91cd\u65b0\u201c\u8ddf\u4e0a\u201dLeader \u540e\uff0c\u4f1a\u88ab Leader \u518d\u6b21\u52a0\u5230 ISR \u4e2d\u3002\u6bcf\u6b21\u6539\u53d8 ISR \u540e\uff0cLeader \u90fd\u4f1a\u5c06\u65b0\u7684 ISR \u6301\u4e45\u5316\u5230 Zookeeper \u4e2d\u3002<\/p>\n<p>\u7531\u4e8e Leader \u53ef\u79fb\u9664\u4e0d\u80fd\u53ca\u65f6\u4e0e\u4e4b\u540c\u6b65\u7684 Follower\uff0c\u6545\u4e0e\u540c\u6b65\u590d\u5236\u76f8\u6bd4\u53ef\u907f\u514d\u6700\u6162\u7684 Follower \u62d6\u6162\u6574\u4f53\u901f\u5ea6\uff0c\u4e5f\u5373 ISR \u63d0\u9ad8\u4e86\u7cfb\u7edf\u53ef\u7528\u6027\u3002<\/p>\n<p>ISR \u4e2d\u7684\u6240\u6709 Follower \u90fd\u5305\u542b\u4e86\u6240\u6709 Commit \u8fc7\u7684\u6d88\u606f\uff0c\u800c\u53ea\u6709 Commit \u8fc7\u7684\u6d88\u606f\u624d\u4f1a\u88ab Consumer \u6d88\u8d39\u3002<\/p>\n<p>\u6545\u4ece Consumer \u7684\u89d2\u5ea6\u800c\u8a00\uff0cISR \u4e2d\u7684\u6240\u6709 Replica \u90fd\u59cb\u7ec8\u5904\u4e8e\u540c\u6b65\u72b6\u6001\uff0c\u4ece\u800c\u4e0e\u5f02\u6b65\u590d\u5236\u65b9\u6848\u76f8\u6bd4\u63d0\u9ad8\u4e86\u6570\u636e\u4e00\u81f4\u6027\u3002<\/p>\n<p>ISR \u53ef\u52a8\u6001\u8c03\u6574\uff0c\u6781\u9650\u60c5\u51b5\u4e0b\uff0c\u53ef\u4ee5\u53ea\u5305\u542b Leader\uff0c\u6781\u5927\u63d0\u9ad8\u4e86\u53ef\u5bb9\u5fcd\u7684\u5b95\u673a\u7684 Follower \u7684\u6570\u91cf\u3002<\/p>\n<p>\u4e0e Majority Quorum \u65b9\u6848\u76f8\u6bd4\uff0c\u5bb9\u5fcd\u76f8\u540c\u4e2a\u6570\u7684\u8282\u70b9\u5931\u8d25\uff0c\u6240\u8981\u6c42\u7684\u603b\u8282\u70b9\u6570\u5c11\u4e86\u8fd1\u4e00\u534a\u3002<\/p>\n<p><strong>\u2462\u5177\u4f53\u5b9e\u73b0\u5c42\u9762\u9ad8\u6548\u4f7f\u7528\u78c1\u76d8\u7279\u6027\u548c\u64cd\u4f5c\u7cfb\u7edf\u7279\u6027<\/strong><\/p>\n<p><strong>\u5c06\u5199\u78c1\u76d8\u7684\u8fc7\u7a0b\u53d8\u4e3a\u987a\u5e8f\u5199<\/strong><\/p>\n<p>Kafka \u7684\u6574\u4e2a\u8bbe\u8ba1\u4e2d\uff0cPartition \u76f8\u5f53\u4e8e\u4e00\u4e2a\u975e\u5e38\u957f\u7684\u6570\u7ec4\uff0c\u800c Broker \u63a5\u6536\u5230\u7684\u6240\u6709\u6d88\u606f\u987a\u5e8f\u5199\u5165\u8fd9\u4e2a\u5927\u6570\u7ec4\u4e2d\u3002<\/p>\n<p>\u540c\u65f6 Consumer \u901a\u8fc7 Offset \u987a\u5e8f\u6d88\u8d39\u8fd9\u4e9b\u6570\u636e\uff0c\u5e76\u4e14\u4e0d\u5220\u9664\u5df2\u7ecf\u6d88\u8d39\u7684\u6570\u636e\uff0c\u4ece\u800c\u907f\u514d\u4e86\u968f\u673a\u5199\u78c1\u76d8\u7684\u8fc7\u7a0b\u3002<\/p>\n<p>\u7531\u4e8e\u78c1\u76d8\u6709\u9650\uff0c\u4e0d\u53ef\u80fd\u4fdd\u5b58\u6240\u6709\u6570\u636e\uff0c\u5b9e\u9645\u4e0a\u4f5c\u4e3a\u6d88\u606f\u7cfb\u7edf Kafka \u4e5f\u6ca1\u5fc5\u8981\u4fdd\u5b58\u6240\u6709\u6570\u636e\uff0c\u9700\u8981\u5220\u9664\u65e7\u7684\u6570\u636e\u3002<\/p>\n<p>\u800c\u8fd9\u4e2a\u5220\u9664\u8fc7\u7a0b\uff0c\u5e76\u975e\u901a\u8fc7\u4f7f\u7528\u201c\u8bfb-\u5199\u201d\u6a21\u5f0f\u53bb\u4fee\u6539\u6587\u4ef6\uff0c\u800c\u662f\u5c06 Partition \u5206\u4e3a\u591a\u4e2a Segment\uff0c\u6bcf\u4e2a Segment \u5bf9\u5e94\u4e00\u4e2a\u7269\u7406\u6587\u4ef6\uff0c\u901a\u8fc7\u5220\u9664\u6574\u4e2a\u6587\u4ef6\u7684\u65b9\u5f0f\u53bb\u5220\u9664 Partition \u5185\u7684\u6570\u636e\u3002<\/p>\n<p>\u8fd9\u79cd\u65b9\u5f0f\u6e05\u9664\u65e7\u6570\u636e\u7684\u65b9\u5f0f\uff0c\u4e5f\u907f\u514d\u4e86\u5bf9\u6587\u4ef6\u7684\u968f\u673a\u5199\u64cd\u4f5c\u3002\u5728\u5b58\u50a8\u673a\u5236\u4e0a\uff0c\u4f7f\u7528\u4e86 Log Structured Merge Trees(LSM) \u3002<\/p>\n<p>\u6ce8\uff1aLog Structured Merge Trees(LSM)\uff0c\u8c37\u6b4c \u201cBigTable\u201d \u7684\u8bba\u6587\u4e2d\u63d0\u51fa\uff0cLSM \u662f\u5f53\u524d\u88ab\u7528\u5728\u8bb8\u591a\u4ea7\u54c1\u7684\u6587\u4ef6\u7ed3\u6784\u7b56\u7565\uff1aHBase\uff0cCassandra\uff0cLevelDB\uff0cSQLite\uff0cKafka\u3002<\/p>\n<p>LSM \u88ab\u8bbe\u8ba1\u6765\u63d0\u4f9b\u6bd4\u4f20\u7edf\u7684 B+ \u6811\u6216\u8005 ISAM \u66f4\u597d\u7684\u5199\u64cd\u4f5c\u541e\u5410\u91cf\uff0c\u901a\u8fc7\u6d88\u53bb\u968f\u673a\u7684\u672c\u5730\u66f4\u65b0\u64cd\u4f5c\u6765\u8fbe\u5230\u8fd9\u4e2a\u76ee\u6807\u3002<\/p>\n<p>\u8fd9\u4e2a\u95ee\u9898\u7684\u672c\u8d28\u8fd8\u662f\u78c1\u76d8\u968f\u673a\u64cd\u4f5c\u6162\uff0c\u987a\u5e8f\u8bfb\u5199\u5feb\u3002\u8fd9\u4e24\u79cd\u64cd\u4f5c\u5b58\u5728\u5de8\u5927\u7684\u5dee\u8ddd\uff0c\u65e0\u8bba\u662f\u78c1\u76d8\u8fd8\u662f SSD\uff0c\u800c\u4e14\u5feb\u81f3\u5c11\u4e09\u4e2a\u6570\u91cf\u7ea7\u3002<\/p>\n<p><strong>\u5145\u5206\u5229\u7528 Page Cache<\/strong><\/p>\n<p>\u4f7f\u7528 Page Cache \u7684\u597d\u5904\u5982\u4e0b\uff1a<\/p>\n<ul>\n<li>I\/O Scheduler \u4f1a\u5c06\u8fde\u7eed\u7684\u5c0f\u5757\u5199\u7ec4\u88c5\u6210\u5927\u5757\u7684\u7269\u7406\u5199\u4ece\u800c\u63d0\u9ad8\u6027\u80fd\u3002<\/li>\n<li>I\/O Scheduler \u4f1a\u5c1d\u8bd5\u5c06\u4e00\u4e9b\u5199\u64cd\u4f5c\u91cd\u65b0\u6309\u987a\u5e8f\u6392\u597d\uff0c\u4ece\u800c\u51cf\u5c11\u78c1\u76d8\u5934\u7684\u79fb\u52a8\u65f6\u95f4\u3002<\/li>\n<li>\u5145\u5206\u5229\u7528\u6240\u6709\u7a7a\u95f2\u5185\u5b58(\u975e JVM \u5185\u5b58)\u3002\u5982\u679c\u4f7f\u7528\u5e94\u7528\u5c42 Cache(\u5373 JVM \u5806\u5185\u5b58)\uff0c\u4f1a\u589e\u52a0 GC \u8d1f\u62c5\u3002<\/li>\n<li>\u8bfb\u64cd\u4f5c\u53ef\u76f4\u63a5\u5728 Page Cache \u5185\u8fdb\u884c\u3002\u5982\u679c\u6d88\u8d39\u548c\u751f\u4ea7\u901f\u5ea6\u76f8\u5f53\uff0c\u751a\u81f3\u4e0d\u9700\u8981\u901a\u8fc7\u7269\u7406\u78c1\u76d8(\u76f4\u63a5\u901a\u8fc7 Page Cache)\u4ea4\u6362\u6570\u636e\u3002<\/li>\n<li>\u5982\u679c\u8fdb\u7a0b\u91cd\u542f\uff0cJVM \u5185\u7684 Cache \u4f1a\u5931\u6548\uff0c\u4f46 Page Cache \u4ecd\u7136\u53ef\u7528\u3002<\/li>\n<\/ul>\n<p>Broker \u6536\u5230\u6570\u636e\u540e\uff0c\u5199\u78c1\u76d8\u65f6\u53ea\u662f\u5c06\u6570\u636e\u5199\u5165 Page Cache\uff0c\u5e76\u4e0d\u4fdd\u8bc1\u6570\u636e\u4e00\u5b9a\u5b8c\u5168\u5199\u5165\u78c1\u76d8\u3002<\/p>\n<p>\u4ece\u8fd9\u4e00\u70b9\u770b\uff0c\u53ef\u80fd\u4f1a\u9020\u6210\u673a\u5668\u5b95\u673a\u65f6\uff0cPage Cache \u5185\u7684\u6570\u636e\u672a\u5199\u5165\u78c1\u76d8\u4ece\u800c\u9020\u6210\u6570\u636e\u4e22\u5931\u3002<\/p>\n<p>\u4f46\u662f\u8fd9\u79cd\u4e22\u5931\u53ea\u53d1\u751f\u5728\u673a\u5668\u65ad\u7535\u7b49\u9020\u6210\u64cd\u4f5c\u7cfb\u7edf\u4e0d\u5de5\u4f5c\u7684\u573a\u666f\uff0c\u800c\u8fd9\u79cd\u573a\u666f\u5b8c\u5168\u53ef\u4ee5\u7531 Kafka \u5c42\u9762\u7684 Replication \u673a\u5236\u53bb\u89e3\u51b3\u3002<\/p>\n<p>\u5982\u679c\u4e3a\u4e86\u4fdd\u8bc1\u8fd9\u79cd\u60c5\u51b5\u4e0b\u6570\u636e\u4e0d\u4e22\u5931\u800c\u5f3a\u5236\u5c06 Page Cache \u4e2d\u7684\u6570\u636e Flush \u5230\u78c1\u76d8\uff0c\u53cd\u800c\u4f1a\u964d\u4f4e\u6027\u80fd\u3002<\/p>\n<p>\u4e5f\u6b63\u56e0\u5982\u6b64\uff0cKafka \u867d\u7136\u63d0\u4f9b\u4e86 flush.messages \u548c flush.ms \u4e24\u4e2a\u53c2\u6570\u5c06 Page Cache \u4e2d\u7684\u6570\u636e\u5f3a\u5236 Flush \u5230\u78c1\u76d8\uff0c\u4f46\u662f Kafka \u5e76\u4e0d\u5efa\u8bae\u4f7f\u7528\u3002<\/p>\n<p>\u5982\u679c\u6570\u636e\u6d88\u8d39\u901f\u5ea6\u4e0e\u751f\u4ea7\u901f\u5ea6\u76f8\u5f53\uff0c\u751a\u81f3\u4e0d\u9700\u8981\u901a\u8fc7\u7269\u7406\u78c1\u76d8\u4ea4\u6362\u6570\u636e\uff0c\u800c\u662f\u76f4\u63a5\u901a\u8fc7 Page Cache \u4ea4\u6362\u6570\u636e\u3002\u540c\u65f6\uff0cFollower \u4ece Leader Fetch \u6570\u636e\u65f6\uff0c\u4e5f\u53ef\u901a\u8fc7 Page Cache \u5b8c\u6210\u3002<\/p>\n<p>\u6ce8\uff1aPage Cache\uff0c\u53c8\u79f0 pcache\uff0c\u5176\u4e2d\u6587\u540d\u79f0\u4e3a\u9875\u9ad8\u901f\u7f13\u51b2\u5b58\u50a8\u5668\uff0c\u7b80\u79f0\u9875\u9ad8\u7f13\u3002<\/p>\n<p>Page Cache \u7684\u5927\u5c0f\u4e3a\u4e00\u9875\uff0c\u901a\u5e38\u4e3a 4K\u3002\u5728 Linux \u8bfb\u5199\u6587\u4ef6\u65f6\uff0c\u5b83\u7528\u4e8e\u7f13\u5b58\u6587\u4ef6\u7684\u903b\u8f91\u5185\u5bb9\uff0c\u4ece\u800c\u52a0\u5feb\u5bf9\u78c1\u76d8\u4e0a\u6620\u50cf\u548c\u6570\u636e\u7684\u8bbf\u95ee\u3002 \u8fd9\u662f Linux \u64cd\u4f5c\u7cfb\u7edf\u7684\u4e00\u4e2a\u7279\u8272\u3002<\/p>\n<p><strong>\u652f\u6301\u591a Disk Drive<\/strong><\/p>\n<p>Broker \u7684 log.dirs \u914d\u7f6e\u9879\uff0c\u5141\u8bb8\u914d\u7f6e\u591a\u4e2a\u6587\u4ef6\u5939\u3002\u5982\u679c\u673a\u5668\u4e0a\u6709\u591a\u4e2a Disk Drive\uff0c\u53ef\u5c06\u4e0d\u540c\u7684 Disk \u6302\u8f7d\u5230\u4e0d\u540c\u7684\u76ee\u5f55\uff0c\u7136\u540e\u5c06\u8fd9\u4e9b\u76ee\u5f55\u90fd\u914d\u7f6e\u5230 log.dirs \u91cc\u3002<\/p>\n<p>Kafka \u4f1a\u5c3d\u53ef\u80fd\u5c06\u4e0d\u540c\u7684 Partition \u5206\u914d\u5230\u4e0d\u540c\u7684\u76ee\u5f55\uff0c\u4e5f\u5373\u4e0d\u540c\u7684 Disk \u4e0a\uff0c\u4ece\u800c\u5145\u5206\u5229\u7528\u4e86\u591a Disk \u7684\u4f18\u52bf\u3002<\/p>\n<p><strong>\u96f6\u62f7\u8d1d<\/strong><\/p>\n<p>Kafka \u4e2d\u5b58\u5728\u5927\u91cf\u7684\u7f51\u7edc\u6570\u636e\u6301\u4e45\u5316\u5230\u78c1\u76d8(Producer \u5230 Broker)\u548c\u78c1\u76d8\u6587\u4ef6\u901a\u8fc7\u7f51\u7edc\u53d1\u9001(Broker \u5230 Consumer)\u7684\u8fc7\u7a0b\u3002\u8fd9\u4e00\u8fc7\u7a0b\u7684\u6027\u80fd\u76f4\u63a5\u5f71\u54cd Kafka \u7684\u6574\u4f53\u541e\u5410\u91cf\u3002<\/p>\n<p>\u4f20\u7edf\u6a21\u5f0f\u4e0b\u7684\u56db\u6b21\u62f7\u8d1d\u4e0e\u56db\u6b21\u4e0a\u4e0b\u6587\u5207\u6362\uff0c\u4ee5\u5c06\u78c1\u76d8\u6587\u4ef6\u901a\u8fc7\u7f51\u7edc\u53d1\u9001\u4e3a\u4f8b\u3002<\/p>\n<p>\u4f20\u7edf\u6a21\u5f0f\u4e0b\uff0c\u4e00\u822c\u4f7f\u7528\u5982\u4e0b\u4f2a\u4ee3\u7801\u6240\u793a\u7684\u65b9\u6cd5\u5148\u5c06\u6587\u4ef6\u6570\u636e\u8bfb\u5165\u5185\u5b58\uff0c\u7136\u540e\u901a\u8fc7 Socket \u5c06\u5185\u5b58\u4e2d\u7684\u6570\u636e\u53d1\u9001\u51fa\u53bb\u3002<\/p>\n<pre>\n \n \n \n <ol>\n  \n  \n  \n  <li>buffer&nbsp;=&nbsp;File.readSocket.send(buffer)&nbsp;<\/li>\n \n \n \n <\/ol><\/pre>\n<p>\u8fd9\u4e00\u8fc7\u7a0b\u5b9e\u9645\u4e0a\u53d1\u751f\u4e86\u56db\u6b21\u6570\u636e\u62f7\u8d1d\uff1a<\/p>\n<ul>\n<li>\u9996\u5148\u901a\u8fc7\u7cfb\u7edf\u8c03\u7528\u5c06\u6587\u4ef6\u6570\u636e\u8bfb\u5165\u5230\u5185\u6838\u6001 Buffer(DMA \u62f7\u8d1d)\u3002<\/li>\n<li>\u7136\u540e\u5e94\u7528\u7a0b\u5e8f\u5c06\u5185\u5b58\u6001 Buffer \u6570\u636e\u8bfb\u5165\u5230\u7528\u6237\u6001 Buffer(CPU \u62f7\u8d1d)\u3002<\/li>\n<li>\u63a5\u7740\u7528\u6237\u7a0b\u5e8f\u901a\u8fc7 Socket \u53d1\u9001\u6570\u636e\u65f6\u5c06\u7528\u6237\u6001 Buffer \u6570\u636e\u62f7\u8d1d\u5230\u5185\u6838\u6001 Buffer(CPU \u62f7\u8d1d)\u3002<\/li>\n<li>\u901a\u8fc7 DMA \u62f7\u8d1d\u5c06\u6570\u636e\u62f7\u8d1d\u5230 NIC Buffer\u3002\u540c\u65f6\uff0c\u8fd8\u4f34\u968f\u7740\u56db\u6b21\u4e0a\u4e0b\u6587\u5207\u6362\u3002<\/li>\n<\/ul>\n<p>\u800c Linux 2.4+ \u5185\u6838\u901a\u8fc7 sendfile \u7cfb\u7edf\u8c03\u7528\uff0c\u63d0\u4f9b\u4e86\u96f6\u62f7\u8d1d\u3002\u6570\u636e\u901a\u8fc7 DMA \u62f7\u8d1d\u5230\u5185\u6838\u6001 Buffer \u540e\uff0c\u76f4\u63a5\u901a\u8fc7 DMA \u62f7\u8d1d\u5230 NIC Buffer\uff0c\u65e0\u9700 CPU \u62f7\u8d1d\u3002\u8fd9\u4e5f\u662f\u96f6\u62f7\u8d1d\u8fd9\u4e00\u8bf4\u6cd5\u7684\u6765\u6e90\u3002<\/p>\n<p>\u9664\u4e86\u51cf\u5c11\u6570\u636e\u62f7\u8d1d\u5916\uff0c\u56e0\u4e3a\u6574\u4e2a\u8bfb\u6587\u4ef6-\u7f51\u7edc\u53d1\u9001\u7531\u4e00\u4e2a sendfile \u8c03\u7528\u5b8c\u6210\uff0c\u6574\u4e2a\u8fc7\u7a0b\u53ea\u6709\u4e24\u6b21\u4e0a\u4e0b\u6587\u5207\u6362\uff0c\u56e0\u6b64\u5927\u5927\u63d0\u9ad8\u4e86\u6027\u80fd\u3002<\/p>\n<p>\u4ece\u5177\u4f53\u5b9e\u73b0\u6765\u770b\uff0cKafka \u7684\u6570\u636e\u4f20\u8f93\u901a\u8fc7 Java NIO \u7684 FileChannel \u7684 transferTo \u548c transferFrom \u65b9\u6cd5\u5b9e\u73b0\u96f6\u62f7\u8d1d\u3002<\/p>\n<p>\u6ce8\uff1a transferTo \u548c transferFrom \u5e76\u4e0d\u4fdd\u8bc1\u4e00\u5b9a\u80fd\u4f7f\u7528\u96f6\u62f7\u8d1d\u3002\u5b9e\u9645\u4e0a\u662f\u5426\u80fd\u4f7f\u7528\u96f6\u62f7\u8d1d\u4e0e\u64cd\u4f5c\u7cfb\u7edf\u76f8\u5173\uff0c\u5982\u679c\u64cd\u4f5c\u7cfb\u7edf\u63d0\u4f9b sendfile \u8fd9\u6837\u7684\u96f6\u62f7\u8d1d\u7cfb\u7edf\u8c03\u7528\uff0c\u5219\u8fd9\u4e24\u4e2a\u65b9\u6cd5\u4f1a\u901a\u8fc7\u8fd9\u6837\u7684\u7cfb\u7edf\u8c03\u7528\u5145\u5206\u5229\u7528\u96f6\u62f7\u8d1d\u7684\u4f18\u52bf\uff0c\u5426\u5219\u5e76\u4e0d\u80fd\u901a\u8fc7\u8fd9\u4e24\u4e2a\u65b9\u6cd5\u672c\u8eab\u5b9e\u73b0\u96f6\u62f7\u8d1d\u3002<\/p>\n<p><strong>\u51cf\u5c11\u7f51\u7edc\u5f00\u9500\u6279\u5904\u7406<\/strong><\/p>\n<p>\u6279\u5904\u7406\u662f\u4e00\u79cd\u5e38\u7528\u7684\u7528\u4e8e\u63d0\u9ad8 I\/O \u6027\u80fd\u7684\u65b9\u5f0f\u3002\u5bf9 Kafka \u800c\u8a00\uff0c\u6279\u5904\u7406\u65e2\u51cf\u5c11\u4e86\u7f51\u7edc\u4f20\u8f93\u7684 Overhead\uff0c\u53c8\u63d0\u9ad8\u4e86\u5199\u78c1\u76d8\u7684\u6548\u7387\u3002<\/p>\n<p>Kafka \u7684 send \u65b9\u6cd5\u5e76\u975e\u7acb\u5373\u5c06\u6d88\u606f\u53d1\u9001\u51fa\u53bb\uff0c\u800c\u662f\u901a\u8fc7 batch.size \u548c linger.ms \u63a7\u5236\u5b9e\u9645\u53d1\u9001\u9891\u7387\uff0c\u4ece\u800c\u5b9e\u73b0\u6279\u91cf\u53d1\u9001\u3002<\/p>\n<p>\u7531\u4e8e\u6bcf\u6b21\u7f51\u7edc\u4f20\u8f93\uff0c\u9664\u4e86\u4f20\u8f93\u6d88\u606f\u672c\u8eab\u4ee5\u5916\uff0c\u8fd8\u8981\u4f20\u8f93\u975e\u5e38\u591a\u7684\u7f51\u7edc\u534f\u8bae\u672c\u8eab\u7684\u4e00\u4e9b\u5185\u5bb9(\u79f0\u4e3a Overhead)\uff0c\u6240\u4ee5\u5c06\u591a\u6761\u6d88\u606f\u5408\u5e76\u5230\u4e00\u8d77\u4f20\u8f93\uff0c\u53ef\u6709\u6548\u51cf\u5c11\u7f51\u7edc\u4f20\u8f93\u7684 Overhead\uff0c\u8fdb\u800c\u63d0\u9ad8\u4e86\u4f20\u8f93\u6548\u7387\u3002<\/p>\n<p><strong>\u6570\u636e\u538b\u7f29\u964d\u4f4e\u7f51\u7edc\u8d1f\u8f7d<\/strong><\/p>\n<p>Kafka \u4ece 0.7 \u5f00\u59cb\uff0c\u5373\u652f\u6301\u5c06\u6570\u636e\u538b\u7f29\u540e\u518d\u4f20\u8f93\u7ed9 Broker\u3002\u9664\u4e86\u53ef\u4ee5\u5c06\u6bcf\u6761\u6d88\u606f\u5355\u72ec\u538b\u7f29\u7136\u540e\u4f20\u8f93\u5916\uff0cKafka \u8fd8\u652f\u6301\u5728\u6279\u91cf\u53d1\u9001\u65f6\uff0c\u5c06\u6574\u4e2a Batch \u7684\u6d88\u606f\u4e00\u8d77\u538b\u7f29\u540e\u4f20\u8f93\u3002<\/p>\n<p>\u6570\u636e\u538b\u7f29\u7684\u4e00\u4e2a\u57fa\u672c\u539f\u7406\u662f\uff0c\u91cd\u590d\u6570\u636e\u8d8a\u591a\u538b\u7f29\u6548\u679c\u8d8a\u597d\u3002\u56e0\u6b64\u5c06\u6574\u4e2a Batch \u7684\u6570\u636e\u4e00\u8d77\u538b\u7f29\u80fd\u66f4\u5927\u5e45\u5ea6\u51cf\u5c0f\u6570\u636e\u91cf\uff0c\u4ece\u800c\u66f4\u5927\u7a0b\u5ea6\u63d0\u9ad8\u7f51\u7edc\u4f20\u8f93\u6548\u7387\u3002<\/p>\n<p>Broker 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