{"id":10006784,"date":"2022-11-01T19:06:47","date_gmt":"2022-11-01T11:06:47","guid":{"rendered":"https:\/\/ityet.com\/?p=10006784"},"modified":"2022-11-01T19:06:47","modified_gmt":"2022-11-01T11:06:47","slug":"%e8%81%8a%e4%b8%80%e8%81%8a%e5%88%86%e5%b8%83%e5%bc%8f%e9%94%81%e7%9a%84%e8%ae%be%e8%ae%a1%e6%a8%a1%e5%9e%8b","status":"publish","type":"post","link":"https:\/\/itmax.cn\/?p=10006784","title":{"rendered":"\u804a\u4e00\u804a\u5206\u5e03\u5f0f\u9501\u7684\u8bbe\u8ba1\u6a21\u578b"},"content":{"rendered":"<p>\u7b80\u4ecb\uff1a\u00a0\u4ec0\u4e48\u662f\u5206\u5e03\u5f0f\u9501\uff1f\u5bf9\u4e8e\u8fd9\u4e2a\u95ee\u9898\uff0c\u76f8\u4fe1\u5f88\u591a\u540c\u5b66\u662f\u5373\u719f\u6089\u53c8\u964c\u751f\u3002\u968f\u7740\u5206\u5e03\u5f0f\u7cfb\u7edf\u7684\u5feb\u901f\u53d1\u5c55\u4e0e\u5e7f\u6cdb\u5e94\u7528\uff0c\u9488\u5bf9\u5171\u4eab\u8d44\u6e90\u7684\u4e92\u65a5\u8bbf\u95ee\u4e5f\u6210\u4e3a\u4e86\u5f88\u591a\u4e1a\u52a1\u5fc5\u987b\u8981\u9762\u5bf9\u7684\u9700\u6c42\uff0c\u8fd9\u4e2a\u573a\u666f\u4e0b\u4eba\u4eec\u901a\u5e38\u4f1a\u5f15\u5165\u5206\u5e03\u5f0f\u9501\u6765\u89e3\u51b3\u95ee\u9898\u3002\u6211\u4eec\u901a\u5e38\u4f1a\u4f7f\u7528\u600e\u4e48\u6837\u7684\u5206\u5e03\u9501\u670d\u52a1\u5462\uff1f\u5728\u4f7f\u7528\u5206\u5e03\u5f0f\u9501\u8fc7\u7a0b\u4e2d\uff0c\u603b\u8fd8\u662f\u4f1a\u63d0\u51fa\u8fd9\u6837\u3001\u90a3\u6837\u7684\u65b0\u9700\u6c42\uff0c\u770b\u8d77\u6765\u627e\u4e0d\u5230\u4e00\u4e2a\u5206\u5e03\u5f0f\u9501\u573a\u666f\u7684\u5927\u4e00\u7edf\u7684\u89e3\u51b3\u65b9\u6848\u3002\u90a3\u4e48\uff0c\u5206\u5e03\u5f0f\u9501\u5185\u90e8\u7a76\u7adf\u662f\u600e\u4e48\u5b9e\u73b0\u7684\uff1f\u6216\u8005\u8bf4\u5e94\u8be5\u600e\u4e48\u5b9e\u73b0\u5462\uff1f\u8fd9\u4e2a\u662f\u6211\u4eec\u8fd9\u7bc7\u6587\u7ae0\u5e0c\u671b\u63a2\u8ba8\u7684\u30021. 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\u7b49\u5206\u5e03\u5f0f\u9501\u670d\u52a1\u63d0\u4f9b\u65b9\u3002\u603b\u7684\u6765\u770b\uff0c\u6211\u4eec\u5bf9\u5206\u5e03\u5f0f\u9501\u7684\u9700\u6c42\u53ef\u4ee5\u5927\u4f53\u5212\u5206\u4e3a\u4ee5\u4e0b\u4e24\u7c7b\u5e94\u7528\u573a\u666f:\u00a0\u5b9e\u73b0\u64cd\u4f5c\u539f\u5b50\u6027\uff1a\u5728\u5355\u673a\u73af\u5883\u4e2d\uff0c\u4e3a\u4e86\u5b9e\u73b0\u591a\u8fdb\u7a0b\u6216\u591a\u7ebf\u7a0b\u5bf9\u5171\u4eab\u8d44\u6e90\u64cd\u4f5c\u8fc7\u7a0b\u7684\u539f\u5b50\u6027\uff0c\u6211\u4eec\u53ef\u4ee5\u501f\u52a9\u5185\u6838\u63d0\u4f9b\u7684 SpinLock \u6216 Mutex 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\u8bbe\u8ba1\u6a21\u578b\u6211\u4eec\u5e94\u8be5\u7ed9\u5206\u5e03\u5f0f\u9501\u5efa\u7acb\u600e\u4e48\u6837\u7684\u8bbe\u8ba1\u6a21\u578b\u5462\uff1f\u8fd9\u4e2a\u95ee\u9898\u53ef\u4ee5\u6362\u4e2a\u89c6\u89d2\u6765\u770b\uff0c\u6211\u4eec\u5e94\u8be5\u5efa\u7acb\u600e\u4e48\u6837\u7684\u5408\u7406\u6027\u8d28\u6765\u6253\u9020\u51fa\u4e00\u4e2a\u5206\u5e03\u5f0f\u9501\u6a21\u578b\uff1f\u6211\u4eec\u4e0d\u59a8\u53c2\u8003\u4e00\u4e0b\u6765\u81ea\u4e1a\u754c\u7684\u4e24\u4e2a\u5b9a\u4e49\u3002\u9996\u5148\u662f Apache Helix\uff08\u5f00\u6e90\u793e\u533a\u4e00\u4e2a\u98ce\u5934\u6b63\u52b2\u7684\u901a\u7528\u96c6\u7fa4\u8d44\u6e90\u7ba1\u7406\u6846\u67b6\uff0c\u5b83\u80fd\u88ab\u7528\u4f5c\u81ea\u52a8\u7ba1\u7406\u5b58\u5728\u4e8e\u96c6\u7fa4\u8282\u70b9\u4e0a\u7684\u5206\u533a\u7684\uff0c\u6709\u526f\u672c\u7684\u5206\u5e03\u5f0f\u8d44\u6e90\uff09\u5bf9\u4e8e\u5206\u5e03\u5f0f\u9501\u7ba1\u7406\u5668\u7684\u6027\u8d28\u5b9a\u4e49\uff1aa\uff09\u5747\u5300\u5206\u5e03\uff0c\u4e0d\u662f\u5148\u5f00\u59cb\u7684\u8282\u70b9\u83b7\u53d6\u6240\u6709\u7684\u5206\u5e03\u5f0f\u9501\uff1bb\uff09\u518d\u8c03\u5ea6\u7684\u5747\u8861\u6027\uff0c\u9700\u8981\u59a5\u5584\u5904\u7406\u6301\u6709\u5206\u5e03\u5f0f\u9501\u7684\u8282\u70b9\u610f\u5916\u9000\u51fa\u540e\u7684\u9501\u8d44\u6e90\u5206\u914d\u95ee\u9898\uff1bc\uff09\u518d\u5e73\u8861\uff0c\u5f53\u6709\u65b0\u7684\u8282\u70b9\u52a0\u5165\u7684\u65f6\u5019\uff0c\u8282\u70b9\u95f4\u7684\u9501\u8d44\u6e90\u5e94\u8be5\u518d\u5206\u914d\u4ee5\u8fbe\u5230\u5747\u8861\u3002\u770b\u7684\u51fa\u6765\uff0cHelix \u5bf9\u5206\u5e03\u5f0f\u9501\u6a21\u578b\u7684\u5b9a\u4e49\u975e\u5e38\u5f3a\u8c03\u5747\u8861\u6027\uff0c\u8003\u8651\u5230\u5b83\u662f\u8d1f\u8d23\u96c6\u7fa4\u5185\u7684\u5206\u533a\u8d44\u6e90\u8c03\u5ea6\u7684\uff0c\u8fd9\u4e2a\u4fa7\u91cd\u70b9\u5e76\u4e0d\u8ba9\u4eba\u610f\u5916\u3002<br \/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042722945\" alt=\"\u56fe\u7247\" title=\"\u56fe\u7247\" loading=\"lazy\"><br \/>\u56fe1 Helix \u63d0\u51fa\u7684\u5206\u5e03\u5f0f\u9501\u7ba1\u7406\u5668\u7684\u6027\u8d28\u00a0\u6211\u4eec\u518d\u770b\u53e6\u4e00\u4e2a\u5927\u540d\u9f0e\u9f0e\u7684 Redis \u5bf9\u5206\u5e03\u5f0f\u9501\u6027\u8d28\u7684\u5b9a\u4e49\uff0c\u5b83\u63d0\u51fa\u4e86\u5206\u5e03\u5f0f\u9501\u6a21\u578b\u5fc5\u987b\u8981\u9075\u5b88\u7684\u4e09\u4e2a\u539f\u5219\uff1aa\uff09\u7edd\u5bf9\u4e92\u65a5\uff0c\u540c\u4e00\u65f6\u523b\uff0c\u53ea\u6709\u4e00\u4e2a\u5ba2\u6237\u7aef\u80fd\u591f\u6301\u6709\u5206\u5e03\u5f0f\u9501\uff1bb\uff09\u6700\u7ec8\u53ef\u7528\uff0c\u5982\u679c\u6301\u6709\u5206\u5e03\u5f0f\u9501\u7684\u5ba2\u6237\u7aef\u610f\u5916\u9000\u51fa\u4e86\uff0c\u90a3\u4e48\u76f8\u5173\u7684\u5206\u5e03\u5f0f\u9501\u8d44\u6e90\u8981\u80fd\u591f\u88ab\u91cd\u65b0\u518d\u5206\u914d\uff1bc\uff09\u670d\u52a1\u5bb9\u9519\uff0c\u63d0\u4f9b\u5206\u5e03\u5f0f\u9501\u7684\u670d\u52a1\u672c\u8eab\u8981\u5177\u5907\u5bb9\u9519\u80fd\u529b\uff0c\u5373\u4f7f\u90e8\u5206\u8282\u70b9\u5d29\u6e83\uff0c\u4e5f\u4e0d\u5f71\u54cd\u6574\u4f53\u7684\u5206\u5e03\u5f0f\u9501\u670d\u52a1\u3002<br \/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042722946\" alt=\"\u56fe\u7247\" title=\"\u56fe\u7247\" loading=\"lazy\"><br \/>\u56fe2 Redis \u63d0\u51fa\u7684\u5206\u5e03\u5f0f\u9501\u7ba1\u7406\u5668\u7684\u6027\u8d28\u00a0\u7ed3\u5408\u81ea\u8eab\u7684\u7ecf\u9a8c\uff0c\u6211\u4eec\u9ad8\u5ea6\u8ba4\u540cRedis\u5bf9\u6709\u5173\u5206\u5e03\u5f0f\u9501\u6a21\u578b\u7684\u57fa\u672c\u7ea6\u675f\u6761\u4ef6\uff0c\u8fd9\u4e9b\u5176\u5b9e\u4e5f\u662f\u5b9e\u73b0\u4e00\u4e2a\u5206\u5e03\u5f0f\u9501\u670d\u52a1\u6240\u5fc5\u987b\u8981\u8003\u8651\u7684\u51e0\u4e2a\u5c5e\u6027\u3002\u5e76\u4e14\uff0cRedis\u76f8\u5173\u7684\u6587\u7ae0\u4e2d\u4e5f\u7ee7\u7eed\u63a2\u8ba8\u4e86\u5206\u5e03\u5f0f\u9501\u7684\u5176\u5b83\u7684\u7279\u6027\u7ea6\u675f\u3002\u4e8b\u5b9e\u4e0a\uff0c\u5982\u4e0b\u56fe3\u6240\u793a\uff0c\u6211\u4eec\u4ece\u4e09\u4e2a\u7ef4\u5ea6\u5f52\u7eb3\u603b\u7ed3\u4e00\u4e2a\u5206\u5e03\u5f0f\u9501\u6a21\u578b\u843d\u5730\u9700\u8981\u8003\u8651\u7684\u6027\u8d28\u3002\u7b2c\u4e00\u4e2a\u7ef4\u5ea6\u662f\u6700\u57fa\u672c\u7684\u7ea6\u675f\u6761\u4ef6\uff0c\u4e0eRedis\u63d0\u51fa\u7684\u5b8c\u5168\u4e00\u81f4\uff0c\u6211\u4eec\u79f0\u4e4b\u4e3a\uff1a\u4e92\u65a5\u6027\uff0c\u53ef\u5bb9\u9519\uff0c\u6700\u7ec8\u53ef\u7528\uff1b\u7b2c\u4e8c\u5c42\u63d0\u51fa\u7684\u5206\u5e03\u5f0f\u9501\u7ba1\u7406\u5668\u9700\u8981\u5173\u6ce8\u7684\u4e00\u4e9b\u9501\u7684\u7279\u6027\uff0c\u8b6c\u5982\u62a2\u9501\u6548\u7387\uff0c\u5206\u5e03\u5f0f\u9501\u7684\u5747\u8861\u6027\uff0c\u9501\u7684\u5207\u6362\u7cbe\u5ea6\uff0c\u9501\u7684\u53ef\u91cd\u5165\u6027\u8d28\u7b49\u7b49\u3002\u5728\u8fd9\u4e2a\u4e4b\u4e0a\uff0c\u8fd8\u6709\u4e00\u4e2a\u5206\u5e03\u5f0f\u9501\u843d\u5730\u65f6\u5019\u5fc5\u987b\u8981\u8003\u8651\u7684\u4e8b\u5173\u6570\u636e\u4e00\u81f4\u6027\u4e0e\u6b63\u786e\u6027\u4fdd\u8bc1\u7684\u7ea6\u675f\uff0c\u5373\u53ef\u9632\u62a4\u6027\u4ee5\u53ca\u5e94\u5bf9\u597d\u65f6\u949f\u6f02\u79fb\u7684\u5f71\u54cd\u3002<br \/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042722947\" alt=\"\u56fe\u7247\" title=\"\u56fe\u7247\" loading=\"lazy\"><br \/>\u56fe3 \u5206\u5e03\u5f0f\u9501\u8bbe\u8ba1\u6a21\u578b\u9700\u8981\u8003\u8651\u7684\u4e09\u4e2a\u7ef4\u5ea6\u7684\u6027\u8d28\u00a0\u5173\u4e8e\u5206\u5e03\u5f0f\u9501\u7ba1\u7406\u5668\u5b9e\u9645\u843d\u5730\u9700\u8981\u8003\u8651\u7684\u6570\u636e\u4e00\u81f4\u6027\u4e0e\u6b63\u786e\u6027\u7684\u8bdd\u9898\uff0c\u5176\u4e2d\u4e00\u4e2a\u8bdd\u9898\u662f\u5899\u4e0a\u65f6\u95f4\u7684\u4e0d\u9760\u8c31\uff0c\u8fd9\u4e2a\u53ef\u4ee5\u5f15\u5165\u975e\u5899\u4e0a\u65f6\u95f4MonoticTime\u6765\u89e3\u51b3\uff0c\u672c\u6587\u5c31\u4e0d\u5728\u8fd9\u4e2a\u95ee\u9898\u4e0a\u505a\u66f4\u591a\u8ba8\u8bba\u3002\u53e6\u4e00\u4e2a\u8bdd\u9898\uff0c\u5b9e\u9645\u4f7f\u7528\u5206\u5e03\u5f0f\u9501\u670d\u52a1\u6765\u8bbf\u95ee\u5171\u4eab\u8d44\u6e90\u7684\u65f6\u5019\u4e00\u5b9a\u8981\u8f85\u52a9\u4ee5Fencing\u80fd\u529b\u65b9\u53ef\u505a\u5230\u8d44\u6e90\u8bbf\u95ee\u7684\u7edd\u5bf9\u4e92\u65a5\u6027\u3002\u5927\u795eMartin Kleppmann\u63d0\u4f9b\u4e86\u4e00\u4e2a\u975e\u5e38\u597d\u7684\u6848\u4f8b\u8bf4\u660e\uff0c\u5982\u4e0b\u56fe4\u6240\u793a\uff0cClient1\u9996\u5148\u83b7\u53d6\u4e86\u5206\u5e03\u5f0f\u9501\u7684\u6240\u6709\u6743\uff0c\u5728\u64cd\u4f5c\u6570\u636e\u7684\u65f6\u5019\u53d1\u751f\u4e86GC\uff0c\u5728\u957f\u65f6\u95f4\u7684&#8221;Stop-The-World&#8221;\u7684GC\u8fc7\u7a0b\u4e2d\u4e22\u5931\u4e86\u9501\u7684\u6240\u6709\u6743\uff0cClient2\u4e89\u62a2\u5230\u4e86\u9501\u6240\u6709\u6743\uff0c\u5f00\u59cb\u64cd\u4f5c\u6570\u636e\uff0c\u7ed3\u679c\u7b49 Client1\u7684GC\u5b8c\u6210\u4e4b\u540e\uff0c\u5c31\u4f1a\u51fa\u73b0Client1\uff0cClient2\u540c\u65f6\u64cd\u4f5c\u6570\u636e\u7684\u60c5\u5f62\uff0c\u9020\u6210\u6570\u636e\u4e0d\u4e00\u81f4\u3002<br \/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042722948\" alt=\"\u56fe\u7247\" title=\"\u56fe\u7247\" loading=\"lazy\"><br \/>\u56fe4 \u7f3a\u4e4fFencing\u4fdd\u62a4\u7684\u5206\u5e03\u5f0f\u9501\u53ef\u80fd\u5bfc\u81f4\u6570\u636e\u4e0d\u4e00\u81f4\u00a0\u00a0 \u00a0 \u00a0\u9488\u5bf9\u4e0a\u8ff0\u95ee\u9898\uff0c\u89e3\u51b3\u65b9\u6848\u662f\u5f15\u5165\u5171\u4eab\u8d44\u6e90\u8bbf\u95ee\u7684IO Fence\u80fd\u529b\uff0c\u5982\u4e0b\u56fe5\u6240\u793a\uff0c\u5168\u5c40\u9501\u670d\u52a1\u63d0\u4f9b\u5168\u5c40\u81ea\u589e\u7684 Token\uff0cClient1\u62ff\u5230\u9501\u8fd4\u56de\u7684Token\u662f33\uff0c\u5e76\u5e26\u5165\u5b58\u50a8\u7cfb\u7edf\uff0c\u53d1\u751f GC\uff0c\u5f53Client2 \u62a2\u9501\u6210\u529f\u8fd4\u56de Token 34\uff0c\u5e26\u5165\u5b58\u50a8\u7cfb\u7edf\uff0c\u5b58\u50a8\u7cfb\u7edf\u4f1a\u62d2\u7edd\u540e\u7eedToken\u5c0f\u4e8e34\u7684\u8bf7\u6c42\uff0c\u90a3\u4e48\u7ecf\u8fc7\u4e86\u957f\u65f6\u95f4GC\u91cd\u65b0\u6062\u590d\u540e\u7684 Client 1\u518d\u6b21\u5199\u5165\u6570\u636e\u7684\u65f6\u5019\uff0c\u56e0\u4e3a\u5e95\u5c42\u5b58\u50a8\u7cfb\u7edf\u8bb0\u5f55\u7684Token\u5df2\u7ecf\u66f4\u65b0\uff0c\u643a\u5e26Token \u503c\u4e3a33\u7684\u8bf7\u6c42\u4f1a\u88ab\u76f4\u63a5\u62d2\u7edd\uff0c\u4ece\u800c\u8fbe\u5230\u4e86\u6570\u636e\u4fdd\u62a4\u7684\u6548\u679c\u3002<br \/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042722949\" alt=\"\u56fe\u7247\" title=\"\u56fe\u7247\" loading=\"lazy\"><br \/>\u56fe5 \u57fa\u4e8e Fencing \u7684\u6570\u636e\u4e00\u81f4\u6027\u4fdd\u969c\u00a0\u56de\u5230\u6587\u7ae0\u7684\u4e3b\u65e8\uff0c\u5982\u4f55\u5b9e\u73b0\u4e00\u4e2a\u9ad8\u6548\u7684\u5206\u5e03\u5f0f\u9501\u7ba1\u7406\u5668\u5462\uff1f\u9996\u5148\uff0c\u629b\u51fa\u4e00\u4e2a\u89c2\u70b9\uff0c\u5206\u5e03\u5f0f\u9501\u7ba1\u7406\u5668\u4e5f\u53ef\u4ee5\u6309\u7167\u63a7\u5236\u5e73\u9762\u4e0e\u6570\u636e\u5e73\u9762\u8fdb\u884c\u5207\u5206\u3002\u56fe3\u4e2d\u63d0\u5230\u7684\u5206\u5e03\u5f0f\u9501\u6027\u8d28\u53ef\u4ee5\u5212\u5206\u5230\u4e0d\u540c\u7684\u5e73\u9762\u5206\u522b\u8d1f\u8d23\u3002\u6211\u4eec\u7684\u8fd9\u4e2a\u89c2\u70b9\u5176\u5b9e\u5e76\u975e\u9996\u521b\uff0c\u4e8b\u5b9e\u4e0a\u5728OSDI&#8217;20\u7684Best Paper -\u300aVirtual Consensus in Delos\u300b\u4e00\u6587\uff0cFacebook\u7684\u7814\u7a76\u56e2\u961f\u9488\u5bf9\u4e00\u81f4\u6027\u534f\u8bae\u7684\u8bbe\u8ba1\u505a\u4e86\u6df1\u5165\u63a2\u8ba8\uff0c\u975e\u5e38\u7684\u7cbe\u5f69\u3002\u6587\u7ae0\u91cc\u9762\u63d0\u5230\u4e86\u7c7b\u4f3cRaft\u8fd9\u7c7b\u5206\u5e03\u5f0f\u4e00\u81f4\u6027\u534f\u8bae\uff0c\u91cc\u9762\u4e5f\u540c\u6837\u53ef\u4ee5\u5206\u62c6\u51fa\u7ba1\u63a7\u5e73\u9762\u4e0e\u6570\u636e\u5e73\u9762\uff0c\u524d\u8005\u8d1f\u8d23\u5bb9\u9519\u3001\u6210\u5458\u53d8\u66f4\u3001\u89d2\u8272\u8c03\u6574\uff0c\u540e\u8005\u8d1f\u8d23\u5b9a\u5e8f\u4e0e\u6301\u4e45\u5316\u3002\u901a\u8fc7\u89e3\u8026\u4e24\u4e2a\u5e73\u9762\uff0c\u4e00\u4e0b\u5b50\u8ba9\u5171\u8bc6\u534f\u8bae\u53d8\u5f97\u5f88\u7075\u6d3b\u3002<br \/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042722950\" alt=\"\u56fe\u7247\" title=\"\u56fe\u7247\" loading=\"lazy\"><br \/>\u56fe6 Delos \u4e2d Virtual Consensus \u5bf9\u7ba1\u63a7\u6570\u636e\u5e73\u9762\u7684\u89c2\u70b9\u00a0\u6211\u4eec\u5206\u5e03\u5f0f\u9501\u6a21\u578b\u7684\u5b9e\u73b0\u662f\u5426\u4e5f\u53ef\u4ee5\u53c2\u8003\u7c7b\u4f3c\u7684\u601d\u8def\u5462\uff1f\u5c06\u5bb9\u9519\u3001\u6210\u5458\u53d8\u66f4\u7b49\u8d1f\u8d23\u7684\u903b\u8f91\u8f6c\u79fb\u81f3\u7ba1\u63a7\u5e73\u9762\uff0c\u800c\u6570\u636e\u5e73\u9762\u8d1f\u8d23\u5206\u5e03\u5f0f\u9501\u7684\u5176\u5b83\u8b6c\u5982\u4e92\u65a5\uff0c\u6700\u7ec8\u53ef\u7528\uff0c\u62a2\u9501\u6548\u7387\u7b49\u7b49\u529f\u80fd\u3002\u7b54\u6848\u662f\u80af\u5b9a\u7684\uff0c\u597d\u5427\uff0c\u5373\u4f7f\u8fd9\u6837\u7684\u601d\u8def\u4e5f\u5e76\u975e\u6211\u4eec\u9996\u521b\uff0c\u5728\u6570\u636e\u5e93\u9886\u57df\uff0c\u4e00\u76f4\u6709\u8fd9\u4e48\u4e2a\u6d41\u6d3e\u6765\u6f14\u8fdb\u8fd9\u7c7b\u7684\u5206\u5e03\u5f0f\u9501\u7cfb\u7edf\uff0c\u5b83\u4eec\u88ab\u7edf\u79f0\u4e3a DLM\uff08Distributed Lock Manager\uff09\uff0c\u5178\u578b\u7684\u6709 Oracle RAC\uff0cGFS2\uff0cOCFS2\uff0cGPFS\uff0c\u6211\u4eec\u63a5\u4e0b\u6765\u597d\u597d\u8bf4\u9053\u8bf4\u9053DLM\u3002\u00a03. \u4f55\u8c13DLM\uff1fDLM \u7684\u601d\u60f3\u6765\u81ea\u300aThe VAX\/VMS Distributed Lock Manager\u300b\uff0c\u57281984\u5e74\u9996\u6b21\u5e94\u7528\u4e8e VAX\/VMS V4.0\u3002\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u4ee5 Oracle RAC \u4e3a\u4f8b\uff0c\u6765\u8bf4\u660e\u4e0b DLM \u7684\u8bbe\u8ba1\u601d\u8def\u3002Oracle RAC\u00a0\u8fd0\u884c\u4e8e\u96c6\u7fa4\u4e4b\u4e0a\uff0c\u57fa\u4e8e\u5185\u5b58\u878d\u5408\u6280\u672f\uff0c\u4f7f\u5f97 Oracle \u6570\u636e\u5e93\u5177\u5907\u9ad8\u53ef\u7528\u6027\u548c\u6781\u81f4\u6027\u80fd\u3002\u5982\u679c\u96c6\u7fa4\u5185\u7684\u4e00\u4e2a\u8282\u70b9\u53d1\u751f\u6545\u969c\uff0cOracle \u53ef\u4ee5\u7ee7\u7eed\u5728\u5176\u4f59\u7684\u8282\u70b9\u4e0a\u8fd0\u884c\u3002\u4e3a\u4e86\u4fdd\u8bc1\u591a\u4e2a\u8282\u70b9\u5199\u5165\u5185\u5b58 Page \u8fc7\u7a0b\u7684\u4e00\u81f4\u6027\uff0c\u4f7f\u7528\u5206\u5e03\u5f0f\u9501\u7ba1\u7406\u5668(DLM)\u5904\u7406\u5206\u5e03\u5f0f\u9501\u8d44\u6e90\u7684\u5206\u914d\u548c\u91ca\u653e\u3002\u5982\u56fe7\u6240\u793a\uff0cDLM \u662f\u4e00\u4e2a\u53bb\u4e2d\u5fc3\u5316\u7684\u8bbe\u8ba1\uff0c\u96c6\u7fa4\u4e2d\u7684\u6240\u6709\u8282\u70b9\u90fd\u662f\u5bf9\u7b49\u7684\uff0c\u6bcf\u4e2a\u8282\u70b9\u90fd\u7ef4\u62a4\u4e86\u90e8\u5206\u9501\u4fe1\u606f\u3002\u90a3\u4e48\u7533\u8bf7\u9501\u65f6\uff0c\u5e94\u8be5\u7531\u8c01\u6765\u51b3\u5b9a\u9501\u7684\u5206\u914d\u5462 ? \u5728 DLM \u4e2d\uff0c\u6bcf\u628a\u9501\u90fd\u6709 Master \u7684\u6982\u5ff5\uff0c\u7531 Master \u7edf\u4e00\u534f\u8c03\u3001\u6388\u6743\uff0c\u51b3\u5b9a\u662f\u5426\u5141\u8bb8\u52a0\u9501\u6216\u89e3\u9501\uff0c\u6bcf\u4e2a\u8282\u70b9\u90fd\u6709\u53ef\u80fd\u6210\u4e3a\u9501\u7684 Master\u3002\u6bcf\u4e2a\u8282\u70b9\u7ba1\u7406\u8fd9\u4e9b\u9501\u8d44\u6e90\u65f6\uff0c\u5c06\u8fd9\u4e9b\u9501\u8d44\u6e90\u901a\u8fc7\u6811\u72b6\u7ed3\u6784\u8fdb\u884c\u7ec4\u7ec7\uff0c\u901a\u8fc7\u5bf9\u6811\u8282\u70b9\u7684\u7236\u5b50\u7ee7\u627f\u5173\u7cfb\u53ef\u4ee5\u4f18\u5316\u9501\u7684\u7c92\u5ea6\uff0c\u63d0\u5347\u52a0\u89e3\u9501\u7684\u6548\u7387\u3002<br \/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042722951\" alt=\"\u56fe\u7247\" title=\"\u56fe\u7247\" loading=\"lazy\"><br \/>\u56fe7 DLM\u7684\u5206\u5e03\u5f0f\u9501\u89d2\u8272\u5173\u7cfb\u00a0\u5728\u52a0\u9501\u6216\u89e3\u9501\u8fc7\u7a0b\u4e2d\uff0c\u6d89\u53ca\u5230\u4ee5\u4e0b\u51e0\u7c7b\u8282\u70b9: a\uff09Requester: \u53d1\u8d77\u52a0\u9501\u6216\u89e3\u9501\u7684\u8282\u70b9\uff1bb\uff09DirectoryNode: \u9501\u7684\u76ee\u5f55\u8282\u70b9\uff0c\u5b58\u653e\u7740\u9501\u7684 Master \u88ab\u54ea\u4e2a\u8282\u70b9\u9501\u6301\u6709\u8fd9\u7c7b\u4fe1\u606f\uff1bd\uff09Master: \u9501\u7684\u6301\u6709\u8005\uff0c\u5b9e\u9645\u7ba1\u7406\u8005\uff0c\u8d1f\u8d23\u9501\u7684\u5206\u914d\uff0c\u91ca\u653e\u3002\u4e0b\u9762\u6211\u4eec\u7528\u5177\u4f53\u793a\u4f8b\u6765\u63cf\u8ff0\u5206\u5e03\u9501\u7684\u5206\u914d\u3001\u91ca\u653e\u7684\u5177\u4f53\u8fc7\u7a0b\uff0c\u4f8b\u5b50\u91cc\u9762\u5b58\u5728A\uff0c B\uff0c C 3\u4e2a\u8282\u70b9\uff0c\u5176\u4e2dA \u4e3a Requester\uff0cB \u4e3a DirectoryNode, C \u4e3a Master \u8282\u70b9\u3002\u00a03.1 \u52a0\u9501\u8fc7\u7a0b\u56fe 8 \u662f\u9700\u8981\u5230\u5176\u4ed6\u8282\u70b9\u4e0a\u52a0\u9501\u7684\u8fc7\u7a0b\uff0c\u662f\u6240\u6709\u52a0\u9501\u60c5\u51b5\u4e2d\u6700\u8017\u65f6\u7684\u60c5\u51b5\uff0c\u6700\u591a\u9700\u8981 2 \u8f6e\u4ea4\u4e92\u3002\u5f53\u8d44\u6e90\u5728\u672c\u5730\u5efa\u7acb\u540e\uff0c\u540e\u7eed\u5bf9\u4e8e\u5177\u6709\u7ee7\u627f\u5173\u7cfb\u7684\u8d44\u6e90\u5728\u672c\u5730\u52a0\u9501\u5c31\u53ef\u4ee5\u4e86\uff0c\u65e0\u9700\u548c\u5176\u4ed6\u8282\u70b9\u8fdb\u884c\u4ea4\u4e92\uff1a1. \u8282\u70b9 A \u5bf9\u8d44\u6e90 R1 \u52a0\u9501\uff0c\u9996\u5148\u5728\u672c\u5730\u6784\u9020\u8be5\u9501\u5bf9\u8c61\uff0c\u4e5f\u79f0\u4e3a\u9501\u7684 shadow\uff0c\u4f46\u6b64\u65f6 A \u8282\u70b9\u5e76\u672a\u52a0\u9501\u6210\u529f\uff1b 2. \u8282\u70b9 A\uff0c\u5bf9\u8d44\u6e90 R1 \u901a\u8fc7\u54c8\u5e0c\u8ba1\u7b97\u51fa R1 \u5bf9\u5e94\u7684\u76ee\u5f55\u7ba1\u7406\u8005\u4e3a\u8282\u70b9 B\uff1b 3. \u8282\u70b9 A \u8bf7\u6c42\u8282\u70b9 B\uff0c\u8282\u70b9 B \u7684\u8bb0\u5f55\u4e0a\u663e\u793a R1 \u7684\u9501\u7684 Master \u5728 C \u4e0a\uff1b 4. \u8282\u70b9 A \u5411\u8282\u70b9 C \u53d1\u8d77\u5bf9 R1 \u52a0\u9501\u8bf7\u6c42\uff1b 5. \u8282\u70b9 C \u7ef4\u62a4 R1 \u7684\u9501\u8bf7\u6c42\u961f\u5217\uff0c\u5982\u679c\u5141\u8bb8 A \u52a0\u9501\uff0c\u5219\u8fd4\u56de\u6210\u529f; 6. A \u66f4\u65b0\u672c\u5730 R1 \u9501 shadow \u76f8\u5173\u4fe1\u606f\uff0c\u52a0\u9501\u5b8c\u6210\u3002<br \/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042722952\" alt=\"\u56fe\u7247\" title=\"\u56fe\u7247\" loading=\"lazy\"><br \/>\u56fe8 DLM\u7684\u52a0\u9501\u8fc7\u7a0b\u00a03.2 \u89e3\u9501\u8fc7\u7a0b\u56fe 9 \u5c55\u793a\u4e86\u89e3\u9501\u7684\u8fc7\u7a0b\uff0c\u4e5f\u6bd4\u8f83\u76f4\u89c2\uff0c\u5982\u4e0b\u4e09\u4e2a\u6b65\u9aa4\uff1a1. \u8282\u70b9 A \u5bf9\u8d44\u6e90 R1 \u89e3\u9501\uff0c\u5220\u9664\u672c\u5730\u6784\u9020\u8be5\u9501\u5bf9\u8c61\uff1b 2. \u8282\u70b9 A \u8bf7\u6c42\u8282\u70b9 C\uff0c\u8bf7\u6c42\u5c06 A \u7684\u9501\u91ca\u653e\uff1b 3. \u82e5 A \u662f\u961f\u5217\u4e2d\u6700\u540e\u4e00\u4e2a\u8bf7\u6c42\u8005\uff0c\u5219\u8282\u70b9 C \u5c06\u53d1\u9001\u8bf7\u6c42\u7ed9 B\uff0c\u5c06 \u00a0R1 \u4ece\u76ee\u5f55\u4e2d\u6458\u9664\uff0c\u4ee5\u4fbf\u540e\u7eed\u5176\u4ed6\u8282\u70b9\u80fd\u591f\u6210\u4e3a\u9501\u7684 Master \uff0c\u5426\u5219\uff0cC \u8282\u70b9\u4ec5\u4ec5\u5c06 A \u4ece R1 \u7684\u52a0\u9501\u961f\u5217\u79fb\u9664\u3002<br \/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042722953\" alt=\"\u56fe\u7247\" title=\"\u56fe\u7247\" loading=\"lazy\"><br \/>\u56fe9 DLM\u7684\u89e3\u9501\u8fc7\u7a0b\u00a03.3 \u6210\u5458\u53d8\u66f4\u00a0 \u00a0 \u00a0 \u00a0\u4e0a\u8ff0\u7684\u52a0\u9501\u548c\u89e3\u9501\u8fc7\u7a0b\uff0c\u4ec5\u4ec5\u662f\u666e\u901a\u7684\u4e00\u6b21\u52a0\u89e3\u9501\u8fc7\u7a0b\u3002\u90a3\u4e48\u96c6\u7fa4\u51fa\u73b0\u8282\u70b9\u6545\u969c\u3001\u96c6\u7fa4\u589e\u5220\u8282\u70b9\uff0c\u5982\u4f55\u63a7\u5236\u5206\u5e03\u5f0f\u9501\u80fd\u591f\u88ab\u6b63\u5e38\u8def\u7531\u548c\u5206\u914d\u5462\uff1f\u5728 DLM \u4e2d\uff0c\u5b58\u5728 Connection Manager \u89d2\u8272\uff0c\u9664\u4e86\u8d1f\u8d23\u5404\u4e2a\u8282\u70b9\u7684\u7f51\u7edc\u901a\u4fe1\uff0c\u8fd8\u6709\u4e00\u4e2a\u91cd\u8981\u529f\u80fd\u662f\u5728\u96c6\u7fa4\u8282\u70b9\u53d1\u751f\u589e\u5220\u65f6\uff0c\u8282\u70b9\u95f4\u9996\u5148\u9009\u4e3e\u51fa leader \u8282\u70b9\u8fdb\u884c\u534f\u8c03\uff0c\u6bcf\u4e2a\u8282\u70b9\u5747\u6709\u53ef\u80fd\u6210\u4e3a leader \u8282\u70b9\u3002\u5728\u53d1\u751f\u8282\u70b9\u589e\u52a0\u6216\u5220\u9664\u65f6\u4f1a\u4e0b\u8ff0\u8fc7\u7a0b:\u00a0\u91cd\u5efa\u8282\u70b9\u62d3\u8865\uff1aleader \u8282\u70b9\u901a\u8fc7\u4e24\u9636\u6bb5\u6295\u7968\u65b9\u5f0f\u5411\u96c6\u7fa4\u5176\u4ed6\u8282\u70b9\u53d1\u8d77\u901a\u544a\uff0c\u544a\u77e5\u5f53\u524d\u96c6\u7fa4\u8282\u70b9\u62d3\u6251\u60c5\u51b5\uff0c\u5176\u4ed6\u8282\u70b9\u6709\u6743\u5229\u63a5\u53d7\u6216\u62d2\u7edd\u8be5\u4fe1\u606f\u3002\u82e5\u5bf9\u8be5\u62d3\u6251\u56fe\u672a\u8fbe\u6210\u4e00\u81f4( \u5176\u4ed6\u8282\u70b9\u62d2\u7edd\u8be5\u62d3\u6251\u4fe1\u606f )\uff0cleader \u4f1a\u4f11\u7720\u4e00\u6bb5\u65f6\u95f4\uff0c\u5176\u4ed6\u8282\u70b9\u6267\u884c leader \u9009\u4e3e\uff0c\u65b0 leader \u4f1a\u5411\u5176\u4ed6\u8282\u70b9\u53d1\u51fa\u901a\u544a\u3002\u901a\u8fc7\u8be5\u65b9\u5f0f\uff0c\u5b9e\u73b0\u96c6\u7fa4\u4e2d\u6240\u6709\u8282\u70b9\u5bf9\u5168\u5c40\u62d3\u6251\u56fe\u4ee5\u53ca\u9501\u8d44\u6e90\u7684\u8def\u7531\u7b97\u6cd5\u8fbe\u6210\u4e00\u81f4\u3002\u5728\u6210\u5458\u53d8\u66f4\u671f\u95f4\uff0c\u4ecd\u53ef\u4ee5\u53d1\u8d77\u62a2\u9501\u8bf7\u6c42\uff0c\u4f46\u8fd9\u4e9b\u8bf7\u6c42\u4f1a\u5728\u8bf7\u6c42\u961f\u5217\u4e2d\uff0c\u5e76\u4e0d\u80fd\u62a2\u9501\u6210\u529f\u3002\u6210\u5458\u53d8\u66f4\u5b8c\u540e\uff0c\u8fd9\u4e9b\u8bf7\u6c42\u6309\u7167\u53d1\u8d77\u987a\u5e8f\u88ab\u91cd\u65b0\u53d1\u51fa\u3002\u91cd\u5efa\u8282\u70b9\u9501\u4fe1\u606f\uff1aleader \u4f1a\u901a\u77e5\u5176\u4ed6\u8282\u70b9\u5bf9\u9501\u4fe1\u606f\u8fdb\u884c\u91cd\u5efa\uff0c\u91cd\u5efa\u8fc7\u7a0b\u62c6\u5206\u4e3a\u591a\u4e2a\u9636\u6bb5\uff0c\u5f53\u6240\u6709\u8282\u70b9\u5b8c\u6210\u4e00\u4e2a\u9636\u6bb5\u540e\uff0cleader \u4f1a\u901a\u77e5\u96c6\u7fa4\u6240\u6709\u8282\u70b9\u8fdb\u5165\u4e0b\u4e00\u4e2a\u9636\u6bb5\u3002\u5728\u91cd\u5efa\u8fc7\u7a0b\u4e2d\uff0c\u4efb\u4e00\u8282\u70b9\u53d1\u751f\u6545\u969c\uff0c\u5747\u9700\u8981\u91cd\u65b0\u53d1\u8d77\u9009\u4e3e\u548c\u91cd\u5efa\u6d41\u7a0b\u3002\u91cd\u5efa\u5206\u4e3a\u4ee5\u4e0b\u9636\u6bb5: 1) \u8282\u70b9\u6e05\u7a7a\u76ee\u5f55\u4fe1\u606f(\u9501\u7684\u8def\u7531\u8868)\u4ee5\u53ca\u8282\u70b9\u6301\u6709\u7684\u9501\uff0c\u8fd9\u662f\u56e0\u4e3a\u9501\u8d44\u6e90\u4fe1\u606f\u9700\u8981\u91cd\u65b0\u8def\u7531\uff1b2) \u5bf9\u4e8e\u4e4b\u524d\u8282\u70b9\u6301\u6709\u7684\u9501\uff0c\u6309\u7167\u539f\u6765\u7684\u8def\u7531\u7b56\u7565\u548c\u987a\u5e8f\u91cd\u65b0\u53d1\u8d77\u52a0\u9501\uff0c\u8fd9\u4e2a\u8fc7\u7a0b\u4f1a\u5c06\u6574\u4e2a\u96c6\u7fa4\u7684\u9501\u7684\u76ee\u5f55\u4fe1\u606f\u91cd\u65b0\u5efa\u7acb\u8d77\u6765\uff0c\u9501\u7684 Master \u91cd\u65b0\u786e\u5b9a\u3002\u7531\u4e8e\u6bcf\u4e2a\u8282\u70b9\u5bf9\u4ec5\u5bf9\u81ea\u8eab\u91cd\u65b0\u52a0\u9501\uff0c\u90a3\u4e48\u5bf9\u4e8e\u53d1\u751f\u6545\u969c\u88ab\u5220\u9664\u8282\u70b9\u800c\u8a00\uff0c\u5b83\u4e4b\u524d\u6301\u6709\u7684\u9501 Master \u4f1a\u88ab\u65b0\u8282\u70b9\u66ff\u4ee3\uff1b3) \u6240\u6709\u8282\u70b9\u5b8c\u6210\u91cd\u65b0\u52a0\u9501\u6d41\u7a0b\u540e\uff0c\u5c31\u53ef\u4ee5\u6267\u884c\u6b63\u5e38\u7684\u52a0\u89e3\u9501\u6d41\u7a0b\u4e86\u3002\u00a0\u00a0 \u00a0 \u00a0 \u00a0\u4ece\u4e0a\u8ff0\u8fc7\u7a0b\uff0c\u6211\u4eec\u53ef\u4ee5\u770b\u5230\u96c6\u7fa4\u53d1\u751f\u8282\u70b9\u6210\u5458\u53d8\u66f4\u65f6\uff0c\u6062\u590d\u8fc7\u7a0b\u662f\u975e\u5e38\u590d\u6742\u7684\u3002\u4e3a\u4e86\u51cf\u5c11\u8fd9\u79cd\u60c5\u51b5\u7684\u53d1\u751f\uff0c\u5f53\u4e00\u4e2a\u8282\u70b9\u901a\u4fe1\u5931\u8d25\u540e\uff0c\u4f1a\u7b49\u5f85\u4e00\u5b9a\u65f6\u95f4\uff0c\u8d85\u8fc7\u8be5\u95f4\u9694\u540e\u4ecd\u65e0\u6cd5\u6b63\u5e38\u901a\u4fe1\uff0c\u624d\u4f1a\u6267\u884c\u5220\u9664\u8282\u70b9\u7684\u6d41\u7a0b\u3002\u4e00\u4e2a\u8282\u70b9\u5982\u679c\u4ec5\u662f\u53d1\u751f\u91cd\u542f\uff0c\u6ca1\u6709\u8fbe\u5230\u9700\u8981\u89e6\u53d1\u6210\u5458\u53d8\u66f4\u7684\u9608\u503c\uff0c\u90a3\u4e48\u53ea\u9700\u8981\u6062\u590d\u8fd9\u4e2a\u8282\u70b9\u5c31\u53ef\u4ee5\u4e86\u3002\u5728\u8fd9\u4e2a\u8fc7\u7a0b\u4e2d\uff0c\u4ec5\u4ec5\u8be5\u8282\u70b9\u7684\u9501\u76f8\u5173\u4fe1\u606f\u4e22\u5931\u4e86\uff0c\u5bf9\u4e8e\u96c6\u7fa4\u7684\u5176\u4ed6\u8282\u70b9\u6ca1\u6709\u5f71\u54cd\u3002\u91cd\u542f\u8fc7\u7a0b\u4e2d\uff0c\u53d1\u5f80\u8be5\u8282\u70b9\u7684\u8bf7\u6c42\u5c06\u4f1a\u88ab Pending \u4f4f\uff0c\u76f4\u5230\u8be5\u8282\u70b9\u6062\u590d\u3002\u00a0 \u00a0 \u00a0 \u00a0 \u53d1\u751f\u91cd\u542f\u7684\u8282\u70b9\uff0c\u4e0a\u9762\u5927\u90e8\u5206\u9501\u4ecd\u80fd\u6062\u590d\u3002\u8282\u70b9\u4e0a\u7684\u9501\u7531\u4e24\u90e8\u5206\u7ec4\u6210\uff0c\u4e00\u90e8\u5206\u4e3aLocal Lock\uff0c\u8868\u793a\u53d1\u8d77\u52a0\u9501\u7684\u4e3a\u8282\u70b9\u81ea\u8eab\u3002\u53e6\u4e00\u90e8\u5206\u4e3a Remote Lock\uff0c\u8868\u793a\u7531\u5176\u4ed6\u8282\u70b9\u53d1\u8d77\u7684\u52a0\u9501\u3002\u5bf9\u4e8eLocal Lock\uff0c\u5176\u4ed6\u8282\u70b9\u6ca1\u6709\u4fe1\u606f\u65e0\u6cd5\u6062\u590d\uff0c\u4f46\u4e0d\u5b58\u5728\u7ade\u4e89\uff0c\u4e5f\u65e0\u9700\u6062\u590d\uff1b\u5bf9\u4e8e RemoteLock\uff0c\u53ef\u4ee5\u4ece\u5176\u4ed6\u8282\u70b9\u7684 shadow \u4fe1\u606f\u4e2d\u8fdb\u884c\u6062\u590d\u3002\u00a03.4 \u4e9b\u8bb8\u601d\u8003\u00a0 \u00a0 \u00a0 \u00a0 \u4ece\u6210\u5458\u53d8\u66f4\u8fc7\u7a0b\uff0c\u6211\u4eec\u53ef\u4ee5\u770b\u5230\uff0cConnection Manager \u5728DLM\u4e2d\u627f\u62c5\u4e86\u6781\u5176\u5173\u952e\u7684\u89d2\u8272\uff0c\u8fd9\u4e2a\u4e5f\u662f\u6574\u4e2a\u8bbe\u8ba1\u4e2d\u6700\u4e3a\u590d\u6742\u7684\u5730\u65b9\uff0c\u5f53\u51fa\u73b0\u8282\u70b9\u6545\u969c\u65f6\uff0c\u7531 Connection Manager \u7edf\u4e00\u534f\u8c03\u9501\u7684\u91cd\u65b0\u5206\u914d\uff0c\u4e8b\u5b9e\u4e0a\u627f\u62c5\u4e86\u6211\u4eec\u6240\u8c13\u7684\u5206\u5e03\u5f0f\u9501\u7ba1\u63a7\u5e73\u9762\u7684\u5de5\u4f5c\u3002DLM\u7684\u4f18\u70b9\u662f\u4ec0\u4e48\uff1f\u8d1f\u8d23\u5206\u5e03\u5f0f\u9501\u8d44\u6e90\u5206\u914d\u7684\u6570\u636e\u5e73\u9762\u4e0d\u7528\u8003\u8651\u6574\u4e2a\u7cfb\u7edf\u7684\u5bb9\u9519\uff0c\u53ef\u4ee5\u5f88\u5747\u8861\u5730\u8ba9\u66f4\u591a\u673a\u5668\u53c2\u4e0e\u5230\u8d44\u6e90\u5206\u914d\uff0c\u5e76\u4e14\u9501\u8d44\u6e90\u4fe1\u606f\u4e0d\u9700\u8981\u843d\u76d8\uff0c\u4e0d\u9700\u8981\u8d70\u5171\u8bc6\u534f\u8bae\u505a\u5bb9\u9519\uff0c\u53ea\u9700\u8981\u5173\u6ce8\u62a2\u9501\u7684\u4e92\u65a5\u6027\u548c\u62a2\u9501\u6548\u7387\u95ee\u9898\uff0c\u8fd9\u4e2a\u62a2\u9501\u6548\u7387\uff0c\u670d\u52a1\u6c34\u5e73\u6269\u5c55\u80fd\u529b\u90fd\u5c06\u975e\u5e38\u6709\u4f18\u52bf\u3002\u901a\u8fc7\u4e0a\u8ff0\u5bf9 DLM \u7684\u52a0\u9501\uff0c\u89e3\u9501\u53ca\u6210\u5458\u53d8\u66f4\u8fc7\u7a0b\u8fdb\u884c\u5256\u6790\uff0c\u8fd9\u4e2a\u91cc\u9762\u8fd8\u662f\u6709\u6bd4\u8f83\u6e05\u6670\u7684\u7ba1\u63a7\u5e73\u9762\u4e0e\u6570\u636e\u5e73\u9762\u7684\u89e3\u8026\u8bbe\u8ba1\uff0c\u5f53\u7136\uff0c\u5b9e\u73b0\u8fc7\u7a0b\u5f88\u590d\u6742\uff0c\u7279\u522b\u662ffailover\u8fd9\u5757\u6062\u590d\u903b\u8f91\u3002\u4f46\u8fd9\u79cd\u601d\u60f3\u8fd8\u662f\u975e\u5e38\u597d\u7684\uff0c\u503c\u5f97\u6211\u4eec\u505a\u67b6\u6784\u8bbe\u8ba1\u65f6\u5019\u501f\u9274\u3002\u5c24\u5176\u8981\u63d0\u5230\u4e00\u70b9\uff0c\u4e0d\u540c\u4e8e DLM \u8d77\u6e90\u7684 1980 \u5e74\u4ee3\uff0c\u540e\u671f\u4e1a\u754c\u6709\u4e86 Paxos\/Raft\/EPaxos \u7b49\u5171\u8bc6\u534f\u8bae\uff0c\u6211\u4eec\u4e5f\u6709\u4e86\u7c7b\u4f3c ZooKeeper\/Etcd \u7b49\u57fa\u4e8e\u5171\u8bc6\u534f\u8bae\u7684\u4e00\u81f4\u6027\u534f\u8bae\uff0c\u6211\u4eec\u7684\u5206\u5e03\u5f0f\u9501\u7ba1\u7406\u5668\u7684\u7ba1\u63a7\u5e73\u9762\u5b8c\u5168\u53ef\u4ee5\u7528\u8d77\u6765\u8fd9\u4e9b\u6210\u719f\u7684\u4e09\u65b9\u7ec4\u4ef6\u3002\u00a04. \u6700\u4f73\u5b9e\u8df5\u963f\u91cc\u4e91\u5b58\u50a8\u90e8\u95e8\u62e5\u6709\u7740\u4ece\u5757\u5b58\u50a8\u5230\u6587\u4ef6\u5b58\u50a8\uff0c\u5bf9\u8c61\u5b58\u50a8\uff0c\u65e5\u5fd7\u5b58\u50a8\uff0c\u4ee5\u53ca\u8868\u683c\u5b58\u50a8\u7b49\u5168\u7403\u6700\u5b8c\u6574\u7684\u5b58\u50a8\u4ea7\u54c1\u4f53\u7cfb\u3002\u56fe 10 \u5c55\u793a\u4e86\u5f53\u524d\u5b58\u50a8\u4ea7\u54c1\u91c7\u7528\u7684\u975e\u5e38\u901a\u7528\u7684\u57fa\u4e8e\u5206\u533a\u8c03\u5ea6\u6a21\u578b\u7684\u7cfb\u7edf\u67b6\u6784\u3002\u6574\u4e2a\u4e1a\u52a1\u7cfb\u7edf\u6309\u7167\u7ba1\u63a7\u5e73\u9762\u4e0e\u6570\u636e\u5e73\u9762\u6765\u5212\u5206\uff0c\u5176\u4e2d\u6570\u636e\u5e73\u9762\u5c06\u7528\u6237\u7684\u5b58\u50a8\u7a7a\u95f4\u6309\u7167\u4e00\u5b9a\u89c4\u5219\u5206\u5272\u6210\u82e5\u5e72\u5206\u533a\uff0c\u5728\u8fd0\u884c\u65f6\u4e00\u4e2a\u5206\u533a\u4f1a\u88ab\u5206\u914d\u81f3\u67d0\u4e2a\u670d\u52a1\u5668\u63d0\u4f9b\u670d\u52a1\uff0c\u4e00\u4e2a\u670d\u52a1\u5668\u53ef\u4ee5\u540c\u65f6\u52a0\u8f7d\u591a\u4e2a\u5206\u533a\u3002\u5206\u533a\u4e0d\u4f7f\u7528\u672c\u673a\u6587\u4ef6\u7cfb\u7edf\u5b58\u50a8\u6301\u4e45\u5316\u6570\u636e\uff0c\u5176\u62e5\u6709\u7684\u5168\u90e8\u6570\u636e\u5747\u4f1a\u5b58\u50a8\u5728\u76d8\u53e4\u5206\u5e03\u5f0f\u6587\u4ef6\u7cfb\u7edf\u4e2d\u7684\u7279\u5b9a\u76ee\u5f55\u3002\u57fa\u4e8e\u5982\u6b64\u7684\u5206\u533a\u8c03\u5ea6\u6a21\u578b\uff0c\u5f53\u67d0\u4e2a\u670d\u52a1\u5668\u53d1\u751f\u5b95\u673a\u7684\u65f6\u5019\uff0c\u5b83\u627f\u8f7d\u7684\u5206\u533a\u9700\u8981\u88ab\u91cd\u65b0\u8c03\u5ea6\uff0c\u5feb\u901f\u8fc1\u79fb\u81f3\u5176\u5b83\u5065\u5eb7\u7684\u670d\u52a1\u5668\u7ee7\u7eed\u63d0\u4f9b\u670d\u52a1\u3002<br \/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042722954\" alt=\"\u56fe\u7247\" title=\"\u56fe\u7247\" loading=\"lazy\"><br \/>\u56fe10 \u4e91\u5b58\u50a8\u57fa\u4e8e\u76d8\u53e4+\u5973\u5a32\u7684\u901a\u7528\u7684\u5206\u533a\u8c03\u5ea6\u8bbe\u8ba1\u6846\u67b6\u00a0\u5728\u4e91\u5b58\u50a8\u7684\u5206\u533a\u8c03\u5ea6\u6a21\u578b\u4e2d\uff0c\u6709\u5173\u5206\u533a\u8d44\u6e90\u7684\u4e92\u65a5\u8bbf\u95ee\uff08\u5373\u4efb\u4f55\u65f6\u523b\u4efb\u4e00\u4e2a\u5206\u533a\u5fc5\u987b\u81f3\u591a\u4e3a\u67d0\u4e00\u53f0\u670d\u52a1\u5668\u6240\u52a0\u8f7d\u5e76\u63d0\u4f9b\u8bfb\u5199\u8bbf\u95ee\u670d\u52a1\uff09\u662f\u5b58\u50a8\u7cfb\u7edf\u63d0\u4f9b\u6570\u636e\u4e00\u81f4\u6027\u7684\u57fa\u77f3\uff0c\u5fc5\u987b\u5f97\u5230\u4fdd\u969c\u3002\u4e8b\u5b9e\u4e0a\uff0c\u4e91\u5b58\u50a8\u7684\u6700\u4f73\u5b9e\u8df5\u4e2d\u6709\u7740\u7c7b\u4f3c DLM \u7684\u8bbe\u8ba1\u54f2\u5b66\uff0c\u5c06\u5206\u5e03\u5f0f\u9501\u7ba1\u7406\u5668\u7684\u5bb9\u9519\u95ee\u9898\u62bd\u79bb\u51fa\u6765\uff0c\u501f\u52a9\u5973\u5a32-\u98de\u5929\u5206\u5e03\u5f0f\u534f\u540c\u57fa\u7840\u670d\u52a1\u63d0\u4f9b\u7684\u9009\u4e3b\u529f\u80fd\u6765\u5b9e\u73b0\uff0c\u8fdb\u800c\u53ef\u4ee5\u4e13\u6ce8\u5728\u5206\u5e03\u5f0f\u9501\u8d44\u6e90\u7684\u8c03\u5ea6\u7b56\u7565\uff1a1\uff09\u7ba1\u63a7\u8c03\u5ea6\u5668\u8d1f\u8d23\u5177\u4f53\u5206\u533a\u8d44\u6e90\u7684\u4e92\u65a5\u5206\u914d\uff0c\u8fd9\u91cc\u7ed3\u5408\u4e0d\u540c\u5b58\u50a8\u4e1a\u52a1\u7684\u7279\u6b8a\u9700\u8981\uff0c\u53ef\u4ee5\u6f14\u8fdb\u51fa\u4e0d\u540c\u7684\u8c03\u5ea6\u7b56\u7565\uff0c\u4ece\u5206\u5e03\u5f0f\u9501\u7684\u5747\u8861\u6027\uff0c\u5206\u5e03\u5f0f\u9501\u7684\u62a2\u9501\u6548\u7387\uff0c\u5206\u5e03\u5f0f\u9501\u7684\u5207\u6362\u7cbe\u5ea6\u7b49\u4e0d\u540c\u7ef4\u5ea6\u505a\u4e13\u9879\u4f18\u5316\uff1b2\uff09\u5206\u5e03\u5f0f\u9501\u7ba1\u7406\u5668\u4e2d\u6700\u590d\u6742\u7684\u5bb9\u9519\u80fd\u529b\uff0c\u901a\u8fc7\u4f9d\u8d56\u5973\u5a32\u9009\u4e3b\u529f\u80fd\u5b9e\u73b0\uff0c\u5e76\u4e14\u901a\u8fc7\u5973\u5a32\u7684\u670d\u52a1\u53d1\u73b0\u80fd\u529b\u5b9e\u73b0\u7ba1\u63a7\u8282\u70b9\u5e73\u6ed1\u4e0a\u4e0b\u7ebf\uff1b3\uff09\u5b58\u50a8\u7cfb\u7edf\u7684\u6570\u636e\u6700\u7ec8\u5747\u5b58\u653e\u5728\u76d8\u53e4-\u98de\u5929\u5206\u5e03\u5f0f\u5b58\u50a8\u6587\u4ef6\u7cfb\u7edf\uff0c\u4ece\u5177\u4f53\u7684\u5206\u533a\u6570\u636e\uff0c\u5230\u7ba1\u63a7\u8c03\u5ea6\u7684\u5143\u6570\u636e\uff0c\u8fd9\u4e9b\u4fe1\u606f\u90fd\u4f1a\u653e\u5165\u76d8\u53e4\u3002\u76d8\u53e4\u63d0\u4f9b\u4e86\u9ad8\u53ef\u9760\u9ad8\u6027\u80fd\u7684\u5b58\u50a8\u670d\u52a1\u4ee5\u53ca Fencing \u4fdd\u62a4\u80fd\u529b\uff0c\u4fdd\u969c\u6570\u636e\u4e00\u81f4\u6027\uff1b<br \/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042722955\" alt=\"\u56fe\u7247\" title=\"\u56fe\u7247\" loading=\"lazy\"><br \/>\u56fe11 \u57fa\u4e8e\u76d8\u53e4\u5206\u5e03\u5f0f\u6587\u4ef6\u7cfb\u7edf\u63d0\u4f9b\u7684 Fencing \u4fdd\u62a4\u00a0\u5206\u5e03\u5f0f\u9501\u63d0\u4f9b Fencing \u4fdd\u62a4\u7684\u6838\u5fc3\u70b9\u662f\u5728\u8bbf\u95ee\u5171\u4eab\u8d44\u6e90\u7684\u65f6\u5019\u5e26\u4e0a Token \u68c0\u67e5\u3002\u76d8\u53e4\u4f5c\u4e3a\u5b58\u50a8\u7684\u7edf\u4e00\u7684\u57fa\u5ea7\uff0c\u901a\u8fc7\u5f15\u5165\u7279\u6b8a\u7684 InlineFile \u6587\u4ef6\u7c7b\u578b\uff0c\u914d\u5408 SealFile \u64cd\u4f5c\uff0c\u5b9e\u73b0\u4e86\u7c7b\u4f3c\u7684 IO Fence \u4fdd\u62a4\u80fd\u529b\uff1aa\uff09SealFile \u64cd\u4f5c\u7528\u6765\u5173\u95ed\u5df2\u7ecf\u6253\u5f00\u7684\u6587\u4ef6\uff0c\u9632\u6b62\u5206\u5e03\u5f0f\u9501\u65e7\u7684\u5360\u6709\u8005\u7ee7\u7eed\u5199\u6570\u636e\uff1bb\uff09\u4e3a\u6bcf\u4e2a\u5206\u533a\u5f15\u5165 InlineFile\uff0c\u9488\u5bf9\u76d8\u53e4\u6587\u4ef6\u7684\u5143\u6570\u636e\u64cd\u4f5c\u5173\u8054 InlineFile \u76f8\u5173\u7684 CAS \u5224\u65ad\uff0c\u8fdb\u800c\u53ef\u4ee5\u9632\u6b62\u5206\u5e03\u5f0f\u9501\u65e7\u7684\u5360\u6709\u8005\u6253\u5f00\u65b0\u7684\u6587\u4ef6\u3002\u5982\u56fe 11 \u6240\u793a\uff0c\u8fd9\u4e24\u5757\u529f\u80fd\u7ed3\u5408\u8d77\u6765\u4e8b\u5b9e\u4e0a\u4e5f\u662f\u63d0\u4f9b\u4e86\u5b58\u50a8\u7cfb\u7edf\u4e2d\u7684\u5199\u6570\u636e Token \u68c0\u67e5\u652f\u6301\u3002\u6211\u4eec\u770b\u5230\uff0c\u5c31\u4e91\u5b58\u50a8\u7684 DLM \u5b9e\u73b0\u4e2d\uff0c\u6709\u4e00\u4e2a\u901a\u7528\u7684\u57fa\u4e8e\u5206\u533a\u7684\u8c03\u5ea6\u5668\uff0c\u6709\u5973\u5a32\u63d0\u4f9b\u5bb9\u9519\u4fdd\u969c\uff0c\u7531\u76d8\u53e4\u63d0\u4f9b\u8d44\u6e90\u7684 Fencing \u4fdd\u62a4\uff0c\u8fd9\u4e2a\u5c31\u662f\u4e91\u5b58\u50a8\u7684\u6700\u4f73\u5b9e\u8df5\u3002\u00a05. \u603b\u7ed3\u5206\u5e03\u5f0f\u9501\u63d0\u4f9b\u4e86\u5206\u5e03\u5f0f\u73af\u5883\u4e0b\u5171\u4eab\u8d44\u6e90\u7684\u4e92\u65a5\u8bbf\u95ee\uff0c\u5728\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e2d\u5e94\u7528\u5341\u5206\u5e7f\u6cdb\u3002\u8fd9\u7bc7\u6587\u7ae0\u4ece\u5206\u5e03\u5f0f\u9501\u7684\u6027\u8d28\u51fa\u53d1\uff0c\u63a2\u8ba8\u4e86\u5206\u5e03\u5f0f\u9501\u7684\u6a21\u578b\u8bbe\u8ba1\u3002\u5c31\u5206\u5e03\u5f0f\u9501\u7cfb\u7edf\uff0c\u6211\u4eec\u63a2\u8ba8\u4e86\u63a7\u5236\u5e73\u9762\u4e0e\u6570\u636e\u5e73\u9762\u89e3\u8026\u7684\u67b6\u6784\u8bbe\u8ba1\uff0c\u5e76\u4ecb\u7ecd\u4e86\u963f\u91cc\u4e91\u5b58\u50a8\u573a\u666f\u4e0b\u5206\u5e03\u5f0f\u9501\u7684\u6700\u4f73\u5b9e\u8df5\u3002\u671f\u671b\u6211\u4eec\u7684\u5206\u4eab\u5bf9\u4e8e\u8bfb\u8005\u670b\u53cb\u6709\u6240\u5e2e\u52a9\u3002\u00a06. \u53c2\u8003\u6587\u732e\u00a0How to do distributed locking\u00a0&#8212;\u00a0Martin Kleppmann\u00a0Distributed Lock Manager\u00a0&#8212; Apache Helix\u00a0Distributed Locks with Redis\u00a0&#8212; Redis\u00a0The VAX\/VMS Distributed Lock Manager\u00a0&#8212; VMS Software\u00a0Cache Fusion: Extending Shared-Disk Clusters with Shared Caches\u00a0&#8212; Oracle RAC\u00a0\u539f\u6587\u94fe\u63a5\uff1a<a href=\"https:\/\/link.segmentfault.com\/?enc=29LiDfmNxj1dIhbC%2B3ISlw%3D%3D.OMDFzZMnv%2BqmkUGsKzqAghDCMLCb2n3wBhoz1FrQ%2B63UeYDQ4lzAU97HLCvn%2ByU5\" rel=\"nofollow\">https:\/\/click.aliyun.com\/m\/10&#8230;<\/a>\u00a0\u672c\u6587\u4e3a\u963f\u91cc\u4e91\u539f\u521b\u5185\u5bb9\uff0c\u672a\u7ecf\u5141\u8bb8\u4e0d\u5f97\u8f6c\u8f7d\u3002<\/p>\n<p><a href=\"https:\/\/segmentfault.com\/a\/1190000042722943\">https:\/\/segmentfault.com\/a\/1190000042722943<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u7b80\u4ecb\uff1a\u00a0\u4ec0\u4e48\u662f\u5206\u5e03\u5f0f\u9501\uff1f\u5bf9\u4e8e\u8fd9\u4e2a\u95ee\u9898\uff0c\u76f8\u4fe1\u5f88\u591a\u540c\u5b66\u662f\u5373\u719f\u6089\u53c8\u964c\u751f\u3002\u968f\u7740\u5206\u5e03\u5f0f\u7cfb\u7edf\u7684\u5feb\u901f\u53d1\u5c55\u4e0e\u5e7f\u6cdb\u5e94\u7528\uff0c\u9488\u5bf9\u5171\u4eab [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[4],"tags":[],"class_list":["post-10006784","post","type-post","status-publish","format-standard","hentry","category-share"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10006784","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=10006784"}],"version-history":[{"count":0,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10006784\/revisions"}],"wp:attachment":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=10006784"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=10006784"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=10006784"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}