\u5728\u6570\u636e\u5e93\u4f18\u5316\u548c\u5b58\u50a8\u89c4\u5212\u8fc7\u7a0b\u4e2d\uff0c\u603b\u4f1a\u63d0\u5230IO\u7684\u4e00\u4e9b\u91cd\u8981\u6982\u5ff5\uff0c\u5728\u8fd9\u91cc\u5c31\u8be6\u7ec6\u8bb0\u5f55\u4e00\u4e0b\uff0c\u5bf9\u8fd9\u4e2a\u6982\u5ff5\u7684\u719f\u6089\u7a0b\u5ea6\u4e5f\u51b3\u5b9a\u4e86\u5bf9\u6570\u636e\u5e93\u4e0e\u5b58\u50a8\u4f18\u5316\u7684\u7406\u89e3\u7a0b\u5ea6\uff0c\u4ee5\u4e0b\u8fd9\u4e9b\u6982\u5ff5\u5e76\u975e\u6743\u5a01\u6587\u6863\uff0c\u6743\u5a01\u7a0b\u5ea6\u80af\u5b9a\u5c31\u4e0d\u80fd\u8bf4\u4e86\u3002<\/p>\n
\u8bfb\/\u5199IO\uff0c\u6700\u4e3a\u5e38\u89c1\u8bf4\u6cd5\uff0c\u8bfbIO\uff0c\u5c31\u662f\u53d1\u6307\u4ee4\uff0c\u4ece\u78c1\u76d8\u8bfb\u53d6\u67d0\u6bb5\u6247\u533a\u7684\u5185\u5bb9\u3002\u6307\u4ee4\u4e00\u822c\u662f\u901a\u77e5\u78c1\u76d8\u5f00\u59cb\u6247\u533a\u4f4d\u7f6e\uff0c\u7136\u540e\u7ed9\u51fa\u9700\u8981\u4ece\u8fd9\u4e2a\u521d\u59cb\u6247\u533a\u5f80\u540e\u8bfb\u53d6\u7684\u8fde\u7eed\u6247\u533a\u4e2a\u6570\uff0c\u540c\u65f6\u7ed9\u51fa\u52a8\u4f5c\u662f\u8bfb\uff0c\u8fd8\u662f\u5199\u3002\u78c1\u76d8\u6536\u5230\u8fd9\u6761\u6307\u4ee4\uff0c\u5c31\u4f1a\u6309\u7167\u6307\u4ee4\u7684\u8981\u6c42\uff0c\u8bfb\u6216\u8005\u5199\u6570\u636e\u3002\u63a7\u5236\u5668\u53d1\u51fa\u7684\u8fd9\u79cd\u6307\u4ee4\uff0b\u6570\u636e\uff0c\u5c31\u662f\u4e00\u6b21IO\uff0c\u8bfb\u6216\u8005\u5199\u3002<\/p>\n
\u5927\/\u5c0f\u5757IO\uff0c\u6307\u63a7\u5236\u5668\u7684\u6307\u4ee4\u4e2d\u7ed9\u51fa\u7684\u8fde\u7eed\u8bfb\u53d6\u6247\u533a\u6570\u76ee\u7684\u591a\u5c11\uff0c\u5982\u679c\u6570\u76ee\u5f88\u5927\uff0c\u6bd4\u5982128\uff0c64\u7b49\u7b49\uff0c\u5c31\u5e94\u8be5\u7b97\u662f\u5927\u5757IO\uff0c\u5982\u679c\u5f88\u5c0f\uff0c\u6bd4\u59821\uff0c 4\uff0c8\u7b49\u7b49\uff0c\u5c31\u5e94\u8be5\u7b97\u662f\u5c0f\u5757IO\uff0c\u5927\u5757\u548c\u5c0f\u5757\u4e4b\u95f4\uff0c\u6ca1\u6709\u660e\u786e\u7684\u754c\u9650\u3002<\/p>\n
\u8fde\u7eed\/\u968f\u673aIO\uff0c\u8fde\u7eed\u548c\u968f\u673a\uff0c\u662f\u6307\u672c\u6b21IO\u7ed9\u51fa\u7684\u521d\u59cb\u6247\u533a\u5730\u5740\uff0c\u548c\u4e0a\u4e00\u6b21IO\u7684\u7ed3\u675f\u6247\u533a\u5730\u5740\uff0c\u662f\u4e0d\u662f\u5b8c\u5168\u8fde\u7eed\u7684\uff0c\u6216\u8005\u76f8\u9694\u4e0d\u591a\u7684\uff0c\u5982\u679c\u662f\uff0c\u5219\u672c\u6b21IO\u5e94\u8be5\u7b97\u662f\u4e00\u4e2a\u8fde\u7eedIO\uff0c\u5982\u679c\u76f8\u5dee\u592a\u5927\uff0c\u5219\u7b97\u4e00\u6b21\u968f\u673aIO\u3002\u8fde\u7eedIO\uff0c\u56e0\u4e3a\u672c\u6b21\u521d\u59cb\u6247\u533a\u548c\u4e0a\u6b21\u7ed3\u675f\u6247\u533a\u76f8\u9694\u5f88\u8fd1\uff0c\u5219\u78c1\u5934\u51e0\u4e4e\u4e0d\u7528\u6362\u9053\u6216\u6362\u9053\u65f6\u95f4\u6781\u77ed\uff1b\u5982\u679c\u76f8\u5dee\u592a\u5927\uff0c\u5219\u78c1\u5934\u9700\u8981\u5f88\u957f\u7684\u6362\u9053\u65f6\u95f4\uff0c\u5982\u679c\u968f\u673aIO\u5f88\u591a\uff0c\u5bfc\u81f4\u78c1\u5934\u4e0d\u505c\u6362\u9053\uff0c\u6548\u7387\u5927\u5927\u964d\u5e95\u3002<\/p>\n
\u987a\u5e8f\/\u5e76\u53d1IO\uff0c\u8fd9\u4e2a\u7684\u610f\u601d\u662f\uff0c\u78c1\u76d8\u63a7\u5236\u5668\u6bcf\u4e00\u6b21\u5bf9\u78c1\u76d8\u7ec4\u53d1\u51fa\u7684\u6307\u4ee4\u5957\uff08\u6307\u5b8c\u6210\u4e00\u4e2a\u4e8b\u7269\u6240\u9700\u8981\u7684\u6307\u4ee4\u6216\u8005\u6570\u636e\uff09\uff0c\u662f\u4e00\u6761\u8fd8\u662f\u591a\u6761\u3002\u5982\u679c\u662f\u4e00\u6761\uff0c\u5219\u63a7\u5236\u5668\u7f13\u5b58\u4e2d\u7684IO\u961f\u5217\uff0c\u53ea\u80fd\u4e00\u4e2a\u4e00\u4e2a\u7684\u6765\uff0c\u6b64\u65f6\u662f\u987a\u5e8fIO\uff1b\u5982\u679c\u63a7\u5236\u5668\u53ef\u4ee5\u540c\u65f6\u5bf9\u78c1\u76d8\u7ec4\u4e2d\u7684\u591a\u5757\u78c1\u76d8\uff0c\u540c\u65f6\u53d1\u51fa\u6307\u4ee4\u5957\uff0c\u5219\u6bcf\u6b21\u5c31\u53ef\u4ee5\u6267\u884c\u591a\u4e2aIO\uff0c\u6b64\u65f6\u5c31\u662f\u5e76\u53d1IO\u6a21\u5f0f\u3002\u5e76\u53d1IO\u6a21\u5f0f\u63d0\u9ad8\u4e86\u6548\u7387\u548c\u901f\u5ea6\u3002<\/p>\n
IO\u5e76\u53d1\u51e0\u7387\u3002\u5355\u76d8\uff0cIO\u5e76\u53d1\u51e0\u7387\u4e3a0\uff0c\u56e0\u4e3a\u4e00\u5757\u78c1\u76d8\u540c\u65f6\u53ea\u53ef\u4ee5\u8fdb\u884c\u4e00\u6b21IO\u3002\u5bf9\u4e8eraid0\uff0c2\u5757\u76d8\u60c5\u51b5\u4e0b\uff0c\u6761\u5e26\u6df1\u5ea6\u6bd4\u8f83\u5927\u7684\u65f6\u5019\uff08\u6761\u5e26\u592a\u5c0f\u4e0d\u80fd\u5e76\u53d1IO\uff0c\u4e0b\u9762\u4f1a\u8bb2\u5230\uff09\uff0c\u5e76\u53d12\u4e2aIO\u7684\u51e0\u7387\u4e3a1\/2\u3002\u5176\u4ed6\u60c5\u51b5\u8bf7\u81ea\u884c\u8fd0\u7b97\u3002<\/p>\n
IOPS\u3002\u4e00\u4e2aIO\u6240\u7528\u7684\u65f6\u95f4\uff1d\u5bfb\u9053\u65f6\u95f4\uff0b\u6570\u636e\u4f20\u8f93\u65f6\u95f4\u3002 IOPS\uff1dIO\u5e76\u53d1\u7cfb\u6570\/\uff08\u5bfb\u9053\u65f6\u95f4\uff0b\u6570\u636e\u4f20\u8f93\u65f6\u95f4\uff09\uff0c\u7531\u4e8e\u5bfb\u9053\u65f6\u95f4\u76f8\u5bf9\u4f20\u8f93\u65f6\u95f4\uff0c\u5927\u51e0\u4e2a\u6570\u91cf\u7ea7\uff0c\u6240\u4ee5\u5f71\u54cdIOPS\u7684\u5173\u952e\u56e0\u7d20\uff0c\u5c31\u662f\u964d\u5e95\u5bfb\u9053\u65f6\u95f4\uff0c\u800c\u5728\u8fde\u7eedIO\u7684\u60c5\u51b5\u4e0b\uff0c\u5bfb\u9053\u65f6\u95f4\u5f88\u77ed\uff0c\u4ec5\u5728\u6362\u78c1\u9053\u65f6\u5019\u9700\u8981\u5bfb\u9053\u3002\u5728\u8fd9\u4e2a\u524d\u63d0\u4e0b\uff0c\u4f20\u8f93\u65f6\u95f4\u8d8a\u5c11\uff0cIOPS\u5c31\u8d8a\u9ad8\u3002<\/p>\n
\u6bcf\u79d2IO\u541e\u5410\u91cf\u3002\u663e\u7136\uff0c\u6bcf\u79d2IO\u541e\u5410\u91cf\uff1dIOPS\u4e58\u4ee5\u5e73\u5747IO SIZE\u3002 Io size\u8d8a\u5927\uff0cIOPS\u8d8a\u9ad8\uff0c\u6bcf\u79d2IO\u541e\u5410\u91cf\u5c31\u8d8a\u9ad8\u3002\u8bbe\u78c1\u5934\u6bcf\u79d2\u8bfb\u5199\u6570\u636e\u901f\u5ea6\u4e3aV\uff0cV\u4e3a\u5b9a\u503c\u3002\u5219IOPS\uff1dIO\u5e76\u53d1\u7cfb\u6570\/\uff08\u5bfb\u9053\u65f6\u95f4\uff0bIO SIZE\/V\uff09\uff0c\u4ee3\u5165\uff0c\u5f97\u6bcf\u79d2IO\u541e\u5410\u91cf\uff1dIO\u5e76\u53d1\u7cfb\u6570\u4e58IO SIZE\u4e58V\/\uff08V\u4e58\u5bfb\u9053\u65f6\u95f4\uff0bIO SIZE\uff09\u3002\u6211\u4eec\u53ef\u4ee5\u770b\u51fa\u5f71\u54cd\u6bcf\u79d2IO\u541e\u5410\u91cf\u7684\u6700\u5927\u56e0\u7d20\uff0c\u5c31\u662fIO SIZE\u548c\u5bfb\u9053\u65f6\u95f4\uff0cIO SIZE\u8d8a\u5927\uff0c\u5bfb\u9053\u65f6\u95f4\u8d8a\u5c0f\uff0c\u541e\u5410\u91cf\u8d8a\u9ad8\u3002\u76f8\u6bd4\u80fd\u663e\u8457\u5f71\u54cdIOPS\u7684\u56e0\u7d20\uff0c\u53ea\u6709\u4e00\u4e2a\uff0c\u5c31\u662f\u5bfb\u9053\u65f6\u95f4\u3002<\/p>\n
\u76ee\u524d\u78c1\u76d8\u90fd\u662f\u673a\u68b0\u65b9\u5f0f\u8fd0\u4f5c\u7684\uff0c\u4e3b\u8981\u4f53\u73b0\u5728\u78c1\u76d8\u8bfb\u5199\u524d\u5bfb\u627e\u78c1\u9053\u7684\u8fc7\u7a0b\u3002\u78c1\u76d8\u81ea\u5e26\u7684\u8bfb\u5199\u7f13\u5b58\u5927\u5c0f\uff0c\u5bf9\u4e8e\u78c1\u76d8\u8bfb\u5199\u901f\u5ea6\u81f3\u5173\u91cd\u8981\u3002\u8bfb\u5199\u901f\u5ea6\u5feb\u7684\u78c1\u76d8\uff0c\u901a\u5e38\u90fd\u5e26\u6709\u8f83\u5927\u7684\u8bfb\u5199\u7f13\u5b58\u3002\u78c1\u76d8\u7684\u5bfb\u9053\u8fc7\u7a0b\u662f\u673a\u68b0\u65b9\u5f0f\uff0c\u51b3\u5b9a\u4e86\u5176\u968f\u673a\u8bfb\u5199\u901f\u5ea6\u5c06\u660e\u663e\u4f4e\u4e8e\u987a\u5e8f\u8bfb\u5199\u3002\u5728\u6211\u4eec\u505a\u7cfb\u7edf\u8bbe\u8ba1\u548c\u5b9e\u73b0\u65f6\uff0c\u9700\u8981\u8003\u8651\u5230\u78c1\u76d8\u7684\u8fd9\u4e00\u7279\u6027\u3002<\/p>\n
FastDFS\u662f\u4e00\u4e2a\u5f00\u6e90\u7684\u9ad8\u6548\u5206\u5e03\u5f0f\u6587\u4ef6\u7cfb\u7edf\uff0c\u5b83\u6700\u521d\u7684\u5b9e\u73b0\uff0c\u6587\u4ef6\u662f\u6309hash\u65b9\u5f0f\u968f\u673a\u5206\u5e03\u5230\u591a\u4e2a\u76ee\u5f55\u4e2d\u7684\uff0c\u540e\u6765\u589e\u52a0\u4e86\u987a\u5e8f\u5b58\u653e\u7684\u505a\u6cd5\u3002\u901a\u8fc7\u5bf9\u6bd4\u6d4b\u8bd5\uff0c\u53d1\u73b0\u6587\u4ef6\u6309\u76ee\u5f55\u987a\u5e8f\u5b58\u50a8\uff0c\u5199\u6587\u4ef6IO\u6548\u7387\u660e\u663e\u9ad8\u4e8e\u6309\u76ee\u5f55\u968f\u673a\u5b58\u50a8\u3002<\/p>\n
\u76ee\u524d\u78c1\u76d8\u987a\u5e8f\u8bfb\u53d6\u7684\u901f\u5ea6\u5e76\u4e0d\u5dee\uff0c\u6bd4\u5982\u666e\u901a\u786c\u76d8\u7684IO\u53ef\u4ee5\u8fbe\u5230\u6bcf\u79d240~60MB\uff0c\u597d\u4e00\u4e9b\u7684\u786c\u76d8\u53ef\u4ee5\u8fbe\u5230\u6bcf\u79d2100MB\u5de6\u53f3\u3002\u5728\u591a\u8fdb\u7a0b\u6216\u591a\u7ebf\u7a0b\u5e76\u53d1\u8bfb\u53d6\u78c1\u76d8\u7684\u60c5\u51b5\u4e0b\uff0c\u968f\u7740\u5e76\u53d1\u6570\u7684\u589e\u52a0\uff0c\u78c1\u76d8IO\u6548\u7387\u5c06\u5927\u5927\u4e0b\u964d\u3002\u4e3b\u8981\u662f\u56e0\u4e3a\u6bcf\u6b21\u8bfb\u5199\uff0c\u78c1\u9053\u53ef\u80fd\u5b58\u5728\u8f83\u5927\u7684\u504f\u79fb\uff0c\u78c1\u9053\u5bfb\u5740\u65f6\u95f4\u52a0\u5927\uff0c\u5bfc\u81f4\u78c1\u76d8IO\u6027\u80fd\u6025\u5267\u4e0b\u964d\u3002\u5bf9\u4e8e\u8fd9\u79cd\u573a\u666f\uff0c\u4f18\u5316\u65b9\u6848\u662f\u5c3d\u53ef\u80fd\u51cf\u5c11\u5e76\u53d1\u8bfb\u5199\u7684\u8fdb\u7a0b\u6570\u6216\u7ebf\u7a0b\u6570\u3002\u53ef\u4ee5\u7528\u9501\u7684\u673a\u5236\uff0c\u4e5f\u53ef\u4ee5\u91c7\u7528\u4e13\u95e8\u7684\u78c1\u76d8IO\u7ebf\u7a0b\u6765\u5bf9\u78c1\u76d8\u8fdb\u884c\u8bfb\u5199\u3002FastDFS 2.x\u7248\u672c\uff0c\u78c1\u76d8\u8bfb\u5199\u5c31\u91c7\u7528\u4e86\u4e13\u95e8\u7684\u7ebf\u7a0b\u6765\u5b8c\u6210\u3002<\/p>\n
\u4e3a\u4e86\u5145\u5206\u53d1\u6325\u591a\u5757\u78c1\u76d8\u7684\u6548\u7387\uff0c\u4e0d\u5efa\u8bae\u4f7f\u7528\u4f20\u7edf\u7684RAID\u65b9\u5f0f\u3002\u6bd4\u8f83\u597d\u7684\u505a\u6cd5\u662f\u6bcf\u5757\u78c1\u76d8\u5355\u72ecmount\uff0c\u901a\u8fc7\u7a0b\u5e8f\u6765\u63a7\u5236\u5bf9\u591a\u5757\u78c1\u76d8\u8fdb\u884c\u5e76\u53d1\u8bfb\u5199\u3002\u91c7\u7528\u5355\u76d8mount\uff0c\u6587\u4ef6\u7684\u5907\u4efd\u548c\u5197\u4f59\u53ef\u4ee5\u901a\u8fc7\u591a\u53f0\u673a\u5668\u5b9e\u73b0\u3002<\/p>\n
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