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\u4e3e\u4e2a\u4f8b\u5b50\uff1a\u7ecf\u5e38\u6709\u4eba\u95ee\u6211LSM-Tree\u67b6\u6784\u4e2d\u6301\u7eed\u5199\u5165\u6570\u636e\u65f6\uff0ccompaction\u95ee\u9898\u5bf9\u6027\u80fd\u5f71\u54cd\u5f88\u5927\u3002\u8fd9\u4e2a\u95ee\u9898\u6211\u662f\u8fd9\u4e48\u770b\u7684\uff0c\u9996\u5148LSM-Tree\u67b6\u6784\u4e0a\u5199\u5165\u541e\u5165\u4f18\u52bf\u7684\u5176\u4e2d\u4e00\u4e2a\u539f\u56e0\u662f\uff0c\u76f8\u6bd4\u4e8einnodb\u8fd9\u79cd\u78c1\u76d8B+ Tree\u5728\u5199\u5165\u7684\u65f6\u5019\u76f4\u63a5sort on write(page\u5185\u6709\u5e8f\uff0c\u5168\u5c40\u6709\u5e8f)\uff0cLSM-Tree\u67b6\u6784\u9009\u62e9\u5c06\u4e00\u90e8\u5206sort\u8f6c\u79fb\u5230sort on compaction\u3001sort on read\uff0c\u672c\u8d28\u4e0a\u662f\u5c06\u5199\u5165\u65f6\u6392\u5e8f\u7684\u8d44\u6e90\u6d88\u8017\uff0c\u8f6c\u79fb\u5230\u4e86compaction\u6216read\u3002\u5237\u810f\u5176\u5b9e\u662f\u5305\u542b\u4e24\u4e2a\u52a8\u4f5c\uff1a\u751f\u6210\u810f\u9875\uff0c\u5c06\u810f\u9875\u5237\u76d8\u3002innodb\u76f8\u5f53\u4e8e\u662f\u5728\u5199\u5165\u7684\u65f6\u5019\u751f\u6210\u810f\u9875\uff0c\u5728\u5237\u810f\u7684\u65f6\u5019\u5c31\u662f\u5355\u7eaf\u7684io\u64cd\u4f5c\u3002\u800ccompaction\u5176\u5b9e\u662f\u540c\u65f6\u505a\u4e86\u751f\u6210\u201c\u810f\u9875\u201d\u548c\u201c\u810f\u9875\u201d\u5237\u76d8\u3002innodb\u5982\u679c\u6301\u7eed\u5199\u5165\u7684\u8bdd\uff0c\u4e5f\u4f1a\u6709\u5237\u810f\u6765\u4e0d\u53ca\u65f6\u5bfc\u81f4\u5f71\u54cd\u5199\u5165\u6027\u80fd\u7684\u95ee\u9898\u3002\u56e0\u4e3ainnodb\u5237\u810f\u548ccompaction\u4e4b\u6240\u4ee5\u6210\u4e3a\u95ee\u9898\uff0c\u672c\u8d28\u4e0a\u90fd\u662f\u56e0\u4e3a\u5185\u5b58\u548c\u78c1\u76d8\u5199\u5165\u901f\u5ea6\u7684\u5dee\u5f02\uff0c\u5bfc\u81f4\u751f\u4ea7\u8005\u6d88\u8d39\u8005\u6a21\u578b\u5931\u8861\u3002\u6240\u4ee5innodb\u7684\u5237\u810f\u548cLSM-Tree\u7684compaction\u672c\u8d28\u4e0a\u662f\u76f8\u540c\u7684\u95ee\u9898\uff0c\u53ea\u662f\u901a\u8fc7\u4e0d\u540c\u7684\u65b9\u6cd5\u6765\u5c06\u8fd9\u4e2a\u8fc7\u7a0b\u5bf9\u7cfb\u7edf\u7684\u5f71\u54cd\u964d\u5230\u6700\u4f4e\u3002<\/p>\n

\u7cfb\u7edf\u8f6f\u4ef6\u6784\u5efa\u7684\u4e03\u4e2a\u9762\u5411
\u63a5\u4e0b\u6765\u7684\u5185\u5bb9\uff0c\u4e3b\u8981\u662f\u5728\u8fdb\u884c\u8be6\u7ec6\u8bbe\u8ba1\u7684\u65f6\u5019\u6211\u8ba4\u4e3a\u6bd4\u8f83\u91cd\u8981\u7684\u539f\u5219\u3002\u8fd9\u4e9b\u539f\u5219\u7684\u9053\u7406\u5176\u5b9e\u5f88\u5bb9\u6613\u7406\u89e3\uff0c\u5e76\u4e14\u201c\u8f6f\u4ef6\u5de5\u7a0b\u201d\u8fd9\u95e8\u5b66\u79d1\u5df2\u7ecf\u7814\u7a76\u7684\u5f88\u5145\u5206\uff0c\u4f46\u662f\u5b9e\u9645\u64cd\u4f5c\u7684\u65f6\u5019\u5176\u5b9e\u662f\u86ee\u56f0\u96be\u7684\uff0c\u53ef\u80fd\u662f\u5386\u53f2\u5305\u88b1\u7684\u539f\u56e0\uff0c\u4e5f\u6709\u53ef\u80fd\u662f\u5916\u754c\u73af\u5883\u7684\u539f\u56e0\uff0c\u9700\u8981\u6839\u636e\u5b9e\u9645\u60c5\u51b5\u505a\u51fa\u4e0d\u540c\u7684trade-off\u3002\u503c\u5f97\u6ce8\u610f\u7684\u662f\uff0c\u6211\u4eec\u505a\u51fa\u7684trade-off\u4e00\u5b9a\u662f\u8981\u7ecf\u8fc7\u4ed4\u7ec6\u8003\u8651\u7684\uff0c\u800c\u4e0d\u662f\u8349\u7387\u7684\uff0c\u5426\u5219\u5f88\u5bb9\u6613\u51fa\u73b0\u201c\u6709\u820d\u6ca1\u6709\u5f97\u201d\u3002\u53e6\u5916\u9075\u5b88\u8fd9\u4e9b\u539f\u5219\u8bbe\u8ba1\u5b9e\u73b0\u51fa\u6765\u7684\u7cfb\u7edf\u548c\u4e0d\u5b8c\u5168\u9075\u5b88\u8fd9\u4e9b\u539f\u5219\u8bbe\u8ba1\u5b9e\u73b0\u51fa\u6765\u7684\u7cfb\u7edf\uff0c\u7ed3\u679c\u5176\u5b9e\u662f\u201c\u597d\u548c\u66f4\u597d\u7684\u533a\u522b\u201d\uff0c\u4f46\u662f\u201c\u597d\u591a\u5c11\u201d\u8fd9\u4e2a\u91cf\u5728\u7cfb\u7edf\u505a\u51fa\u6765\u4e4b\u524d\uff0c\u5176\u5b9e\u5f88\u96be\u8861\u91cf\u3002\u8fd9\u4e03\u4e2a\u539f\u5219\u4e0d\u662f\u72ec\u7acb\u5b58\u5728\u7684\uff0c\u800c\u662f\u76f8\u8f85\u76f8\u6210\u7684\u3002<\/p>\n

\u9762\u5411\u573a\u666f: \u9996\u5148\u6211\u4eec\u9700\u8981\u660e\u786e\u8981\u89e3\u51b3\u4ec0\u4e48\u95ee\u9898\uff0c\u8fd9\u662f\u6574\u4e2a\u7cfb\u7edf\u6784\u5efa\u7684\u51fa\u53d1\u70b9\u3002one size fit all\u7684\u7cfb\u7edf\u5728\u8fc7\u53bb\u662f\u4e0d\u5b58\u5728\u7684\uff0c\u5728\u672a\u6765\u4e5f\u4e0d\u4e00\u5b9a\u5b58\u5728\u3002\u7cfb\u7edf\u7684\u5b8c\u5584\uff0c\u5fc5\u7136\u662f\u8981\u9760\u4e0d\u65ad\u7684\u8fed\u4ee3\u6765\u5b8c\u6210\u7684\uff0c\u90a3\u4e48\u5982\u4f55\u8fed\u4ee3\u672c\u8d28\u4e0a\u5c31\u662f\u6211\u4eec\u5728\u90a3\u4e9b\u9636\u6bb5\u89e3\u51b3\u54ea\u4e9b\u95ee\u9898\u3002\u4e00\u4e2a\u7cfb\u7edf\u53ef\u4ee5\u6709\u8fdc\u5927\u7684\u76ee\u6807\u53bb\u89e3\u51b3\u5f88\u591a\u95ee\u9898\uff0c\u4f46\u662f\u6240\u6709\u95ee\u9898\u7684\u8def\u6807\u9700\u8981\u6709\u76f8\u5bf9\u6e05\u6670\u7684\u89c4\u5212\uff0c\u4ee5\u8fbe\u5230\u65e2\u53ef\u4ee5\u5feb\u901f\u6ee1\u8db3\u9700\u6c42\uff0c\u540c\u65f6\u4fdd\u7559\u5411\u672a\u6765\u6f14\u8fdb\u548c\u6269\u5c55\u7684\u57fa\u7840\u3002<\/p>\n

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\u603b\u7ed3
\u8bf4\u4e86\u8fd9\u4e48\u591a\uff0c\u6700\u7ec8\u7cfb\u7edf\u8fd8\u662f\u9760\u4e00\u884c\u884c\u7684code\u5b9e\u73b0\u51fa\u6765\u7684\uff0c\u4fdd\u6301\u5320\u5fc3\u3001\u4e25\u8c28\u3001\u8f83\u771f\u7684\u6001\u5ea6\u53bb\u6253\u9020\u7cfb\u7edf\u662f\u975e\u5e38\u6734\u7d20\u6b63\u786e\uff0c\u4f46\u53c8\u5f88\u96be\u505a\u5230\u7684\u4e8b\u60c5\uff0c\u5171\u52c9\uff01<\/p>\n

\u539f\u6587\u94fe\u63a5\uff1ahttp:\/\/click.aliyun.com\/m\/100…<\/a><\/p>\n

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https:\/\/segmentfault.com\/a\/1190000042209767<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

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