{"id":1994,"date":"2011-04-27T00:40:19","date_gmt":"2011-04-27T00:40:19","guid":{"rendered":"http:\/\/www.icocean.com\/blog\/?p=1994"},"modified":"2011-04-27T00:46:17","modified_gmt":"2011-04-27T00:46:17","slug":"mysql%E4%B8%AD%E6%96%87%E6%89%8B%E5%86%8C%3A%E4%BB%8E%E5%8F%82%E6%95%B0%E4%BC%98%E5%8C%96%E4%B8%AD%E5%BE%97%E5%88%B0%E6%9C%80%E5%A4%A7%E7%9A%84%E6%95%B0%E6%8D%AE%E5%BA%93%E6%80%A7%E8%83%BD14","status":"publish","type":"post","link":"https:\/\/www.icocean.com\/blog\/?p=1994","title":{"rendered":"MySQL\u4e2d\u6587\u624b\u518c: \u4ece\u53c2\u6570\u4f18\u5316\u4e2d\u5f97\u5230\u6700\u5927\u7684\u6570\u636e\u5e93\u6027\u80fd(1\/4)"},"content":{"rendered":"<p>MySQL\u4e2d\u6587\u53c2\u8003\u624b\u518c<br \/>&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8211;<\/p>\n<p>10 \u4eceMySQL\u5f97\u5230\u6700\u5927\u7684\u6027\u80fd<\/p>\n<p>\u4f18\u5316\u662f\u4e00\u9879\u590d\u6742\u7684\u4efb\u52a1\uff0c\u56e0\u4e3a\u5b83\u6700\u7ec8\u9700\u8981\u5bf9\u6574\u4e2a\u7cfb\u7edf\u7684\u7406\u89e3\u3002\u5f53\u7528\u4f60\u7684\u7cfb\u7edf\/\u5e94\u7528\u7684\u5c0f\u77e5\u8bc6\u505a\u4e00\u4e9b\u5c40\u90e8\u4f18\u5316\u662f\u53ef\u80fd\u7684\u65f6\u5019\uff0c\u4f60\u8d8a\u60f3\u8ba9\u4f60\u7684\u7cfb\u7edf\u66f4\u4f18\u5316\uff0c\u4f60\u5fc5\u987b\u77e5\u9053\u5b83\u4e5f\u8d8a\u591a\u3002 <\/p>\n<p>\u56e0\u6b64\uff0c\u672c\u7ae0\u5c06\u8bd5\u56fe\u89e3\u91ca\u5e76\u7ed9\u51fa\u4f18\u5316MySQL\u7684\u4e0d\u540c\u65b9\u6cd5\u7684\u4e00\u4e9b\u4f8b\u5b50\u3002\u4f46\u662f\u8bb0\u4f4f\u603b\u662f\u6709\u67d0\u4e9b(\u9010\u6e10\u53d8\u96be)\u662f\u7cfb\u7edf\u66f4\u5feb\u7684\u65b9\u6cd5\u7559\u7740\u53bb\u505a\u3002 <\/p>\n<p>10.1 \u4f18\u5316\u6982\u8ff0<br \/>\u4e3a\u4e86\u4f7f\u4e00\u4e2a\u7cfb\u7edf\u66f4\u5feb\u7684\u6700\u91cd\u8981\u90e8\u5206\u5f53\u7136\u662f\u57fa\u672c\u8bbe\u8ba1\u3002\u4f60\u4e5f\u9700\u8981\u77e5\u9053\u4f60\u7684\u7cfb\u7edf\u5c06\u505a\u8fd9\u6837\u7684\u4e8b\u60c5\uff0c\u90a3\u5c31\u662f\u4f60\u7684\u74f6\u9888\u3002 <\/p>\n<p>\u6700\u5e38\u89c1\u7684\u74f6\u9888\u662f\uff1a <\/p>\n<p>\u78c1\u76d8\u5bfb\u9053\u3002\u78c1\u76d8\u82b1\u65f6\u95f4\u627e\u5230\u4e00\u4e2a\u6570\u636e\uff0c\u7528\u57281999\u5e74\u7684\u73b0\u4ee3\u78c1\u76d8\u5176\u5e73\u5747\u65f6\u95f4\u901a\u5e38\u5c0f\u4e8e10ms\uff0c\u56e0\u6b64\u7406\u8bba\u4e0a\u6211\u4eec\u80fd\u5927\u7ea6\u4e00\u79d2\u5bfb\u9053 1000 \u6b21\u3002\u8fd9\u4e2a\u65f6\u95f4\u7528\u65b0\u78c1\u76d8\u63d0\u9ad8\u5f88\u6162\u5e76\u4e14\u5f88\u96be\u5bf9\u4e00\u4e2a\u8868\u4f18\u5316\u3002\u4f18\u5316\u5b83\u7684\u65b9\u6cd5\u662f\u5c06\u6570\u636e\u6563\u5e03\u5728\u591a\u4e2a\u78c1\u76d8\u4e0a\u3002 <\/p>\n<p>\u5f53\u78c1\u76d8\u5728\u6211\u4eec\u9700\u8981\u8bfb\u6570\u636e\u7684\u6b63\u786e\u4f4d\u7f6e\u65f6\uff0c\u78c1\u76d8\u8bfb\/\u5199\u3002\u75281999\u5e74\u7684\u73b0\u4ee3\uff0c\u4e00\u4e2a\u78c1\u76d8\u4f20\u8f93\u7c7b\u4f3c10-20Mb\/s\u3002\u8fd9\u5fc5\u5bfb\u9053\u66f4\u5bb9\u6613\u4f18\u5316\uff0c\u56e0\u4e3a\u4f60\u80fd\u4ece\u591a\u4e2a\u78c1\u76d8\u5e76\u884c\u5730\u8bfb\u3002 <\/p>\n<p>CPU\u5468\u671f\u3002\u5f53\u6211\u4eec\u8bfb\u6570\u636e\u8fdb\u5185\u5b58\u65f6\uff0c(\u6216\u5982\u679c\u5b83\u5df2\u7ecf\u5728\u90a3\u91cc)\u6211\u4eec\u9700\u8981\u5904\u7406\u5b83\u4ee5\u8fbe\u5230\u6211\u4eec\u7684\u7ed3\u679c\u3002\u5f53\u6211\u4eec\u6709\u76f8\u5bf9\u5185\u5b58\u8f83\u5c0f\u7684\u8868\u65f6\uff0c\u8fd9\u662f\u6700\u5e38\u89c1\u7684\u9650\u5236\u56e0\u7d20\uff0c\u4f46\u662f\u7528\u5c0f\u8868\u901f\u5ea6\u901a\u5e38\u4e0d\u662f\u95ee\u9898\u3002 <\/p>\n<p>\u5185\u5b58\u5e26\u5bbd\u3002\u5f53CPU\u9700\u8981\u8d85\u51fa\u9002\u5408cpu\u7f13\u5b58\u7684\u6570\u636e\u65f6\uff0c\u7f13\u5b58\u5e26\u5bbd\u5c31\u6210\u4e3a\u5185\u5b58\u7684\u4e00\u4e2a\u74f6\u9888\u3002\u8fd9\u662f\u5bf9\u5927\u591a\u6570\u7cfb\u7edf\u7684\u4e00\u4e2a\u4e0d\u5e38\u89c1\u7684\u74f6\u9888\u4f46\u662f\u4f60\u5e94\u8be5\u77e5\u9053\u5b83\u3002 <!--more--><\/p>\n<p>10.2 \u7cfb\u7edf\/\u7f16\u8bd1\u65f6\u548c\u542f\u52a8\u53c2\u6570\u7684\u8c03\u8282<\/p>\n<p>\u6211\u4eec\u4ee5\u7cfb\u7edf\u7ea7\u7684\u4e1c\u897f\u5f00\u59cb\uff0c\u56e0\u4e3a\u8fd9\u4e9b\u51b3\u7b56\u7684\u67d0\u4e00\u4e9b\u5f88\u65e9\u5c31\u505a\u597d\u4e86\u3002\u5728\u5176\u4ed6\u60c5\u51b5\u4e0b\uff0c\u5feb\u901f\u6d4f\u89c8\u8fd9\u90e8\u5206\u53ef\u80fd\u5c31\u591f\u4e86\uff0c\u56e0\u4e3a\u5b83\u5bf9\u5927\u6536\u83b7\u5e76\u4e0d\u91cd\u8981\uff0c\u4f46\u662f\u6709\u4e00\u4e2a\u5173\u4e8e\u5728\u8fd9\u4e2a\u5c42\u6b21\u4e0a\u6536\u83b7\u6709\u591a\u5927\u7684\u611f\u89c9\u603b\u662f\u597d\u7684\u3002 <\/p>\n<p>\u4f7f\u7528\u7684\u7f3a\u7701OS\u786e\u5b9e\u91cd\u8981\uff01\u4e3a\u4e86\u6700\u5927\u7a0b\u5ea6\u5730\u4f7f\u7528\u591aCPU\uff0c\u5e94\u8be5\u4f7f\u7528Solaris(\u56e0\u4e3a\u7ebf\u7a0b\u5de5\u4f5c\u5f97\u786e\u5b9e\u4e0d\u9519)\u6216Linux(\u56e0\u4e3a2.2\u672c\u7684\u6838\u5fc3\u53c8\u786e\u5b9e\u4e0d\u9519\u7684SMP\u652f\u6301)\u3002\u800c\u4e14\u572832\u4f4d\u7684\u673a\u5668\u4e0a\uff0cLinux\u7f3a\u7701\u67092G\u7684\u6587\u4ef6\u5927\u5c0f\u9650\u5236\u3002\u5f53\u65b0\u7684\u6587\u4ef6\u7cfb\u7edf\u88ab\u91ca\u51fa\u65f6( XFS )\uff0c\u5e0c\u671b\u8fd9\u4e0d\u4e45\u88ab\u4fee\u6b63\u3002 <\/p>\n<p>\u56e0\u4e3a\u6211\u4eec\u6ca1\u5728\u5f88\u591a\u5e73\u53f0\u4e0a\u8fd0\u884c\u751f\u4ea7MySQL\uff0c\u6211\u4eec\u5fe0\u544a\u4f60\u5728\u53ef\u80fd\u9009\u62e9\u5b83\u524d\uff0c\u6d4b\u8bd5\u4f60\u6253\u7b97\u8fd0\u884c\u7684\u5e73\u53f0\u3002 <\/p>\n<p>\u5176\u4ed6\u5efa\u8bae\uff1a <\/p>\n<p>\u5982\u679c\u4f60\u6709\u8db3\u591f\u7684RAM\uff0c\u4f60\u80fd\u5220\u9664\u6240\u6709\u4ea4\u6362\u8bbe\u5907\u3002\u4e00\u4e9b\u64cd\u4f5c\u7cfb\u7edf\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\u5c06\u4f7f\u7528\u4e00\u4e2aSWAP\u8bbe\u5907\uff0c\u5373\u4f7f\u4f60\u6709\u7a7a\u95f2\u7684\u5185\u5b58\u3002 <br \/>\u4f7f\u7528&#8211;skip-locking\u7684MySQL\u9009\u9879\u907f\u514d\u5916\u90e8\u9501\u5b9a\u3002\u6ce8\u610f\u8fd9\u5c06\u4e0d\u5f71\u54cdMySQL\u529f\u80fd\uff0c\u53ea\u8981\u5b83\u4ec5\u8fd0\u884c\u5728\u4e00\u4e2a\u670d\u52a1\u5668\u4e0a\u3002\u53ea\u8981\u4f60\u8fd0\u884cmyisamchk\u4ee5\u524d\uff0c\u8bb0\u5f97\u8981\u505c\u6389\u670d\u52a1\u5668(\u6216\u9501\u5b9a\u76f8\u5173\u90e8\u5206)\u3002\u5728\u4e00\u4e9b\u7cfb\u7edf\u4e0a\u8fd9\u4e2a\u5f00\u5173\u662f\u5f3a\u5236\u7684\uff0c\u56e0\u4e3a\u5916\u90e8\u9501\u5b9a\u4e0d\u662f\u5728\u4efb\u4f55\u60c5\u51b5\u4e0b\u90fd\u5de5\u4f5c\u3002\u5f53\u7528MIT-pthreads\u7f16\u8bd1\u65f6\uff0c&#8211;skip-locking\u9009\u9879\u7f3a\u7701\u4e3a\u6253\u5f00(on)\uff0c\u56e0\u4e3aflock()\u6ca1\u5728\u6240\u6709\u7684\u5e73\u53f0\u4e0a\u88abMIT-pthreads\u5145\u5206\u652f\u6301\u3002\u552f\u4e00\u7684\u60c5\u51b5\u662f\u5982\u679c\u4f60\u5bf9\u540c\u4e00\u6570\u636e\u8fd0\u884cMySQL\u670d\u52a1\u5668(\u4e0d\u662f\u5ba2\u6237)\uff0c\u4f60\u4e0d\u80fd\u4f7f\u7528&#8211;skip-locking\u4e4b\u65f6\uff0c\u5426\u5219\u5bf9\u6ca1\u6709\u5148\u6e05\u6389(flushing)\u6216\u5148\u9501\u5b9amysqld\u670d\u52a1\u5668\u7684\u8868\u4e0a\u8fd0\u884cmyisamchk\u3002\u4f60\u4ecd\u7136\u80fd\u4f7f\u7528LOCK TABLES\/ UNLOCK TABLES\uff0c\u5373\u4f7f\u4f60\u6b63\u5728\u4f7f\u7528&#8211;skip-locking\u3002 <\/p>\n<p>10.2.1 \u7f16\u8bd1\u548c\u94fe\u63a5\u600e\u6837\u5f71\u54cdMySQL\u7684\u901f\u5ea6<\/p>\n<p>\u5927\u591a\u6570\u4e0b\u5217\u6d4b\u8bd5\u5728Linux\u4e0a\u5e76\u7528MySQL\u57fa\u51c6\u8fdb\u884c\u7684\uff0c\u4f46\u662f\u5b83\u4eec\u5e94\u8be5\u5bf9\u5176\u4ed6\u64cd\u4f5c\u7cfb\u7edf\u548c\u5de5\u4f5c\u8d1f\u8f7d\u7ed9\u51fa\u4e00\u4e9b\u6307\u793a\u3002 <\/p>\n<p>\u5f53\u4f60\u7528-static\u94fe\u63a5\u65f6\uff0c\u4f60\u5f97\u5230\u6700\u5feb\u7684\u53ef\u6267\u884c\u6587\u4ef6\u3002\u4f7f\u7528Unix\u5957\u63a5\u5b57\u800c\u975eTCP\/IP\u8fde\u63a5\u4e00\u4e2a\u6570\u636e\u5e93\u4e5f\u53ef\u7ed9\u51fa\u597d\u4e00\u4e9b\u7684\u6027\u80fd\u3002 <\/p>\n<p>\u5728Linux\u4e0a\uff0c\u5f53\u7528pgcc\u548c-O6\u7f16\u8bd1\u65f6\uff0c\u4f60\u5c06\u5f97\u5230\u6700\u5feb\u7684\u4ee3\u7801\u3002\u4e3a\u4e86\u7528\u8fd9\u4e9b\u9009\u9879\u7f16\u8bd1\u201csql_yacc.cc\u201d\uff0c\u4f60\u9700\u8981\u5927\u7ea6200M\u5185\u5b58\uff0c\u56e0\u4e3agcc\/pgcc\u9700\u8981\u5f88\u591a\u5185\u5b58\u4f7f\u6240\u6709\u51fd\u6570\u5d4c\u5165\uff08inline\uff09\u3002\u5728\u914d\u7f6eMySQL\u65f6\uff0c\u4f60\u4e5f\u5e94\u8be5\u8bbe\u5b9aCXX=gcc\u4ee5\u907f\u514d\u5305\u62eclibstdc++\u5e93(\u5b83\u4e0d\u9700\u8981)\u3002 <\/p>\n<p>\u53ea\u901a\u8fc7\u4f7f\u7528\u4e00\u4e2a\u8f83\u597d\u7684\u7f16\u8bd1\u5668\u6216\u8f83\u597d\u7684\u7f16\u8bd1\u5668\u9009\u9879\uff0c\u5728\u5e94\u7528\u4e2d\u4f60\u80fd\u5f97\u5230\u4e00\u4e2a10-30%\u7684\u52a0\u901f\u3002\u5982\u679c\u4f60\u81ea\u5df1\u7f16\u8bd1SQL\u670d\u52a1\u5668\uff0c\u8fd9\u7279\u522b\u91cd\u8981\uff01 <\/p>\n<p>\u5728Intel\u4e0a\uff0c\u4f60\u5e94\u8be5\u4f8b\u5982\u4f7f\u7528pgcc\u6216Cygnus CodeFusion\u7f16\u8bd1\u5668\u5f97\u5230\u6700\u5927\u901f\u5ea6\u3002\u6211\u4eec\u5df2\u7ecf\u6d4b\u8bd5\u4e86\u65b0\u7684 Fujitsu\u7f16\u8bd1\u5668\uff0c\u4f46\u662f\u5b83\u662f\u8fd8\u6ca1\u8db3\u591f\u4e0d\u51fa\u9519\u6765\u4f18\u5316\u7f16\u8bd1MySQL\u3002 <\/p>\n<p>\u8fd9\u91cc\u662f\u6211\u4eec\u505a\u8fc7\u7684\u4e00\u4e9b\u6d4b\u91cf\u8868\uff1a <\/p>\n<p>\u5982\u679c\u4f60\u4ee5-O6\u4f7f\u7528pgcc\u5e76\u4e14\u7f16\u8bd1\u4efb\u4f55\u4e1c\u897f\uff0cmysqld\u670d\u52a1\u5668\u662f\u6bd4\u7528gcc\u5feb11%\uff08\u7528\u5b57\u7b26\u4e3299\u7684\u7248\u672c)\u3002 <br \/>\u5982\u679c\u4f60\u52a8\u6001\u5730\u94fe\u63a5(\u6ca1\u6709-static)\uff0c\u7ed3\u679c\u6162\u4e8613%\u3002\u6ce8\u610f\u4f60\u4ecd\u80fd\u4f7f\u7528\u4e00\u4e2a\u52a8\u6001\u8fde\u63a5\u7684MySQL\u5e93\u3002\u53ea\u6709\u670d\u52a1\u5668\u5bf9\u6027\u80fd\u662f\u5173\u952e\u7684\u3002 <br \/>\u5982\u679c\u4f60\u4f7f\u7528TCP\/IP\u800c\u975eUnix\u5957\u63a5\u5b57\uff0c\u7ed3\u679c\u61627.5%\u3002 <br \/>\u5728\u4e00\u4e2aSun SPARCstation 10\u4e0a\uff0cgcc2.7.3\u662f\u6bd4Sun Pro C++ 4.2\u5feb13%\u3002 <br \/>\u5728Solaris 2.5.1\u4e0a\uff0c\u5728\u5355\u4e2a\u5904\u7406\u5668\u4e0aMIT-pthreads\u6bd4\u5e26\u539f\u751f\u7ebf\u7a0b\u7684Solaris\u61628-12%\u3002\u4ee5\u66f4\u591a\u7684\u8d1f\u8f7d\/cpus\uff0c\u5dee\u522b\u5e94\u8be5\u53d8\u5f97\u66f4\u5927\u3002 <br \/>\u7531TcX\u63d0\u4f9b\u7684MySQL-Linux\u7684\u5206\u53d1\u7528pgcc\u7f16\u8bd1\u5e76\u9759\u6001\u94fe\u63a5\u3002 <\/p>\n<p>10.2.2 \u78c1\u76d8\u95ee\u9898<br \/>\u6b63\u5982\u524d\u9762\u6240\u8ff0\uff0c\u78c1\u76d8\u5bfb\u9053\u662f\u4e00\u4e2a\u6027\u80fd\u7684\u5927\u74f6\u9888\u3002\u5f53\u6570\u636e\u5f00\u59cb\u589e\u957f\u4ee5\u81f4\u7f13\u5b58\u53d8\u5f97\u4e0d\u53ef\u80fd\u65f6\uff0c\u8fd9\u4e2a\u95ee\u9898\u53d8\u5f97\u8d8a\u6765\u8d8a\u660e\u663e\u3002\u5bf9\u5927\u6570\u636e\u5e93\uff0c\u5728\u90a3\u4f60\u6216\u591a\u6216\u5c11\u5730\u8981\u968f\u673a\u5b58\u53d6\u6570\u636e\uff0c\u4f60\u53ef\u4ee5\u4f9d\u9760\u4f60\u5c06\u81f3\u5c11\u9700\u8981\u4e00\u6b21\u78c1\u76d8\u5bfb\u9053\u6765\u8bfb\u53d6\u5e76\u4e14\u51e0\u6b21\u78c1\u76d8\u5bfb\u9053\u5199\u5165\u3002\u4e3a\u4e86\u4f7f\u8fd9\u4e2a\u95ee\u9898\u6700\u5c0f\u5316\uff0c\u4f7f\u7528\u6709\u4f4e\u5bfb\u9053\u65f6\u95f4\u7684\u78c1\u76d8\u3002 <br \/>\u4e3a\u4e86\u589e\u52a0\u53ef\u7528\u78c1\u76d8\u8f74\u7684\u6570\u91cf(\u5e76\u4e14\u4ece\u800c\u51cf\u5c11\u5bfb\u9053\u5f00\u9500)\uff0c\u7b26\u53f7\u8054\u63a5\u6587\u4ef6\u5230\u4e0d\u540c\u78c1\u76d8\u6216\u5206\u5272\u78c1\u76d8\u662f\u53ef\u80fd\u7684\u3002 <br \/>\u4f7f\u7528\u7b26\u53f7\u8fde\u63a5 <br \/>\u8fd9\u610f\u5473\u7740\u4f60\u5c06\u7d22\u5f15\/\u6570\u636e\u6587\u4ef6\u7b26\u53f7\u4ece\u6b63\u5e38\u7684\u6570\u636e\u76ee\u5f55\u94fe\u63a5\u5230\u5176\u4ed6\u78c1\u76d8(\u90a3\u4e5f\u53ef\u4ee5\u88ab\u5206\u5272\u7684)\u3002\u8fd9\u4f7f\u5f97\u5bfb\u9053\u548c\u8bfb\u53d6\u65f6\u95f4\u66f4\u597d(\u5982\u679c\u78c1\u76d8\u4e0d\u7528\u4e8e\u5176\u4ed6\u4e8b\u60c5)\u3002\u89c110.2.2.1 \u4f7f\u7528\u6570\u636e\u5e93\u548c\u8868\u7684\u7b26\u53f7\u94fe\u63a5\u3002 <br \/>\u5206\u5272 <br \/>\u5206\u5272\u610f\u5473\u7740\u4f60\u6709\u8bb8\u591a\u78c1\u76d8\u5e76\u628a\u7b2c\u4e00\u5757\u653e\u5728\u7b2c\u4e00\u4e2a\u78c1\u76d8\u4e0a\uff0c\u5728\u7b2c\u4e8c\u5757\u653e\u5728\u7b2c\u4e8c\u4e2a\u78c1\u76d8\u4e0a\uff0c\u5e76\u4e14\u7b2c n\u5757\u5728\u7b2c(n mod number_of_disks)\u78c1\u76d8\u4e0a\uff0c\u7b49\u7b49\u3002\u8fd9\u610f\u5473\u7740\uff0c\u5982\u679c\u4f60\u7684\u6b63\u5e38\u6570\u636e\u5927\u5c0f\u4e8e\u5206\u5272\u5927\u5c0f(\u6216\u5b8c\u7f8e\u5730\u6392\u5217\u8fc7)\uff0c\u4f60\u5c06\u5f97\u5230\u8f83\u597d\u4e00\u4e9b\u7684\u6027\u80fd\u3002\u6ce8\u610f\uff0c\u5206\u5272\u662f\u5426\u5f88\u4f9d\u8d56\u4e8eOS\u548c\u5206\u5272\u5927\u5c0f\u3002\u56e0\u6b64\u7528\u4e0d\u540c\u7684\u5206\u5272\u5927\u5c0f\u6d4b\u8bd5\u4f60\u7684\u5e94\u7528\u7a0b\u5e8f\u3002\u89c110.8 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\/>\u4e00\u4e2a\u597d\u9009\u62e9\u662f\u8ba9\u7a0d\u91cd\u8981\u7684\u6570\u636e(\u5b83\u80fd\u518d\u751f)\u4e0a\u5b58\u5728RAID 0\u78c1\u76d8\u4e0a\uff0c\u800c\u5c06\u786e\u5b9e\u91cd\u8981\u7684\u6570\u636e(\u50cf\u4e3b\u673a\u4fe1\u606f\u548c\u65e5\u5fd7\u6587\u4ef6)\u5b58\u5728\u4e00\u4e2aRAID 0+1\u6216RAID N\u78c1\u76d8\u4e0a\u3002\u5982\u679c\u56e0\u4e3a\u66f4\u65b0\u5947\u5076\u4f4d\u4f60\u6709\u8bb8\u591a\u5199\u5165\uff0cRAID N\u53ef\u80fd\u662f\u4e00\u4e2a\u95ee\u9898\u3002 <br \/>\u4f60\u4e5f\u53ef\u4ee5\u5bf9\u6570\u636e\u5e93\u4f7f\u7528\u7684\u6587\u4ef6\u7cfb\u7edf\u8bbe\u7f6e\u53c2\u6570\u3002\u4e00\u4e2a\u5bb9\u6613\u7684\u6539\u53d8\u662f\u4ee5noatime\u9009\u9879\u6302\u88c5\u6587\u4ef6\u7cfb\u7edf\u3002\u8fd9\u662f\u5b83\u8df3\u8fc7\u66f4\u65b0\u5728inode\u4e2d\u7684\u6700\u540e\u8bbf\u95ee\u65f6\u95f4\uff0c\u800c\u4e14\u8fd9\u5c06\u907f\u514d\u4e00\u4e9b\u78c1\u76d8\u5bfb\u9053\u3002 <br \/>10.2.2.1 \u4e3a\u6570\u636e\u5e93\u548c\u8868\u4f7f\u7528\u7b26\u53f7\u94fe\u63a5<br \/>\u4f60\u53ef\u4ee5\u4ece\u6570\u636e\u5e93\u76ee\u5f55\u79fb\u52a8\u8868\u548c\u6570\u636e\u5e93\u5230\u522b\u5904\uff0c\u5e76\u4e14\u7528\u94fe\u63a5\u5230\u65b0\u5730\u70b9\u7684\u7b26\u53f7\u4ee3\u66ff\u5b83\u4eec\u3002\u4f60\u53ef\u80fd\u60f3\u8981\u8fd9\u6837\u505a\uff0c\u4f8b\u5982\uff0c\u8f6c\u79fb\u4e00\u4e2a\u6570\u636e\u5e93\u5230\u6709\u66f4\u591a\u7a7a\u95f2\u7a7a\u95f4\u7684\u4e00\u4e2a\u6587\u4ef6\u7cfb\u7edf\u3002 <\/p>\n<p>\u5982\u679cMySQL\u6ce8\u610f\u5230\u4e00\u4e2a\u8868\u662f\u4e00\u4e2a\u7b26\u53f7\u94fe\u63a5\uff0c\u5b83\u5c06\u89e3\u6790\u7b26\u53f7\u94fe\u63a5\u5e76\u4e14\u4f7f\u7528\u5176\u5b9e\u9645\u6307\u5411\u7684\u8868\uff0c\u5b83\u53ef\u5de5\u4f5c\u5728\u652f\u6301realpath()\u8c03\u7528\u7684\u6240\u6709\u7cfb\u7edf\u4e0a(\u81f3\u5c11Linux\u548cSolaris\u652f\u6301realpath())\uff01\u5728\u4e0d\u652f\u6301realpath()\u7684\u7cfb\u7edf\u4e0a\uff0c\u4f60\u5e94\u8be5\u4e0d\u540c\u65f6\u901a\u8fc7\u771f\u5b9e\u8def\u5f84\u548c\u7b26\u53f7\u94fe\u63a5\u8bbf\u95ee\u8868\uff01\u5982\u679c\u4f60\u8fd9\u6837\u505a\uff0c\u8868\u5728\u4efb\u4f55\u66f4\u65b0\u540e\u5c06\u4e0d\u4e00\u81f4\u3002 <\/p>\n<p>MySQL\u7f3a\u7701\u4e0d\u652f\u6301\u6570\u636e\u5e93\u94fe\u63a5\u3002\u53ea\u8981\u4f60\u4e0d\u5728\u6570\u636e\u5e93\u4e4b\u95f4\u505a\u4e00\u4e2a\u7b26\u53f7\u94fe\u63a5\uff0c\u4e00\u5207\u5c06\u5de5\u4f5c\u6b63\u5e38\u3002\u5047\u5b9a\u4f60\u5728MySQL\u6570\u636e\u76ee\u5f55\u4e0b\u6709\u4e00\u4e2a\u6570\u636e\u5e93db1\uff0c\u5e76\u4e14\u505a\u4e86\u4e00\u4e2a\u7b26\u53f7\u94fe\u63a5db2\u6307\u5411db1\uff1a<\/p>\n<p>shell>; cd \/path\/to\/datadir<br \/>shell>; ln -s db1 db2<\/p>\n<p>\u73b0\u5728\uff0c\u5bf9\u5728db1\u4e2d\u7684\u4efb\u4e00\u8868tbl_a\uff0c\u5728db2\u79cd\u4e5f\u597d\u8c61\u6709\u4e00\u4e2a\u8868tbl_a\u3002\u5982\u679c\u4e00\u4e2a\u7ebf\u7a0b\u66f4\u65b0db1.tbl_a\u5e76\u4e14\u53e6\u4e00\u4e2a\u7ebf\u7a0b\u66f4\u65b0db2.tbl_a\uff0c\u5c06\u6709\u95ee\u9898\u3002 <\/p>\n<p>\u5982\u679c\u4f60\u786e\u5b9e\u9700\u8981\u8fd9\u6837\uff0c\u4f60\u5fc5\u987b\u6539\u53d8\u4e0b\u5217\u5728\u201cmysys\/mf_format.c\u201d\u4e2d\u7684\u4ee3\u7801\uff1a <\/p>\n<p>if (!lstat(to,&#038;stat_buff))&nbsp;&nbsp;\/* Check if it&#39;s a symbolic link *\/<br \/>&nbsp;&nbsp;&nbsp;&nbsp;if (S_ISLNK(stat_buff.st_mode) &#038;&#038; realpath(to,buff))<\/p>\n<p>\u628a\u4ee3\u7801\u6539\u53d8\u4e3a\u8fd9\u6837\uff1a <\/p>\n<p>if (realpath(to,buff))<\/p>\n","protected":false},"excerpt":{"rendered":"<p>MySQL\u4e2d\u6587\u53c2\u8003\u624b\u518c&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#038;# <a href='https:\/\/www.icocean.com\/blog\/?p=1994' class='excerpt-more'>[&#8230;]<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[24],"tags":[366,392,1870,1881,3208,2391],"class_list":["post-1994","post","type-post","status-publish","format-standard","hentry","category-lamp","tag-mysql","tag-392","tag-1870","tag-1881","tag-3208","tag-2391","category-24-id","post-seq-1","post-parity-odd","meta-position-corners","fix"],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/www.icocean.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1994","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.icocean.com\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.icocean.com\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.icocean.com\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.icocean.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1994"}],"version-history":[{"count":0,"href":"https:\/\/www.icocean.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1994\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.icocean.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1994"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.icocean.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1994"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.icocean.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1994"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}