{"id":10145,"date":"2013-08-26T00:14:00","date_gmt":"2013-08-25T16:14:00","guid":{"rendered":""},"modified":"2013-08-26T00:14:00","modified_gmt":"2013-08-25T16:14:00","slug":"","status":"publish","type":"post","link":"https:\/\/www.homejamesfinance.com\/p\/10145.html","title":{"rendered":"\u6d45\u8c08RAID\u5199\u60e9\u7f5a\uff08Write Penalty\uff09\u4e0eIOPS\u8ba1\u7b97"},"content":{"rendered":"<p><strong>\u4ecb\u7ecd<\/strong><\/p>\n<p>\u901a\u5e38\u5728\u8ba8\u8bba\u4e0d\u540cRAID\u4fdd\u62a4\u7c7b\u578b\u7684\u6027\u80fd\u7684\u65f6\u5019\uff0c\u7ed3\u8bba\u90fd\u4f1a\u662fRAID-1\u63d0\u4f9b\u6bd4\u8f83\u597d\u7684\u8bfb\u5199\u6027\u80fd\uff0cRAID-5\u8bfb\u6027\u80fd\u4e0d\u9519\uff0c\u4f46\u662f\u5199\u5165\u6027\u80fd\u5c31\u4e0d\u5982RAID-1\uff0cRAID-6\u4fdd\u62a4\u7ea7\u522b\u66f4\u9ad8\uff0c\u4f46\u5199\u6027\u80fd\u76f8\u5bf9\u66f4\u52a0\u5dee\uff0cRAID10\u662f\u63d0\u4f9b\u6700\u597d\u7684\u6027\u80fd\u548c\u6570\u636e\u4fdd\u62a4\uff0c\u4e0d\u8fc7\u6210\u672c\u6700\u9ad8\u7b49\u7b49\u3002\u5176\u5b9e\u51b3\u5b9a\u8fd9\u4e9b\u6027\u80fd\u8003\u8651\u7684\u56e0\u7d20\u5f88\u7b80\u5355\uff0c\u5b83\u5c31\u662fRAID Write Penalty\uff08\u5199\u60e9\u7f5a\uff09\u3002\u672c\u6587\u4ece\u539f\u7406\u4e0a\u89e3\u91ca\u4e86\u4e0d\u540cRAID\u4fdd\u62a4\u7ea7\u522b\u7684\u5199\u60e9\u7f5a\uff0c\u4ee5\u53ca\u901a\u8fc7\u5199\u60e9\u7f5a\u8ba1\u7b97\u53ef\u7528IOPS\u7684\u65b9\u6cd5\u3002<\/p>\n<p><strong>\u66f4\u591a\u4fe1\u606f<\/strong><\/p>\n<p><strong>RAID-5 Write Penalty\u7684\u4f8b\u5b50:<\/strong><\/p>\n<p>\u5b58\u50a8\u65b9\u6848\u89c4\u5212\u7684\u8fc7\u7a0b\u4e2d\uff0c\u6700\u57fa\u672c\u7684\u8003\u8651\u56e0\u7d20\u6709\u4e24\u4e2a\uff0c\u6027\u80fd\u548c\u5bb9\u91cf\u3002\u6027\u80fd\u4e0a\u7684\u8ba1\u7b97\u770b\u53ef\u4ee5\u5206\u4e3aIOPS\u548c\u5e26\u5bbd\u9700\u6c42\u3002\u8ba1\u7b97IOPS\uff0c\u629b\u5f00\u5b58\u50a8\u9635\u5217\u7684\u7f13\u5b58\u548c\u524d\u7aef\u53e3\u4e0d\u8c08\u3002\u8ba1\u7b97\u540e\u7aef\u7269\u7406\u78c1\u76d8\u7684IOPS\u4e0d\u80fd\u7b80\u5355\u7684\u628a\u7269\u7406\u78c1\u76d8\u7684\u6700\u5927IOPS\u76f8\u52a0\u800c\u83b7\u5f97\u3002\u539f\u56e0\u662f\uff0c\u5bf9\u4e8e\u4e0d\u540c\u7684RAID\u7ea7\u522b\uff0c\u4e3a\u4e86\u4fdd\u8bc1\u5f53\u6709\u7269\u7406\u78c1\u76d8\u635f\u574f\u7684\u60c5\u51b5\u4e0b\u53ef\u4ee5\u6062\u590d\u6570\u636e\uff0c\u6570\u636e\u5199\u5165\u7684\u8fc7\u7a0b\u4e2d\u90fd\u9700\u8981\u6709\u4e00\u4e9b\u7279\u522b\u7684\u8ba1\u7b97\u3002\u6bd4\u5982\u5bf9\u4e8eRAID-5\uff0c\u6761\u5e26\u4e0a\u7684\u4efb\u610f\u78c1\u76d8\u4e0a\u7684\u6570\u636e\u6539\u53d8\uff0c\u90fd\u4f1a\u91cd\u65b0\u8ba1\u7b97\u6821\u9a8c\u4f4d\u3002\u5982\u4e0b\u56fe\u6240\u793a\uff0c\u4e00\u4e2a7+1\u7684RAID-5\u7684\u6761\u5e26\u4e2d\uff0c\u4e03\u4e2a\u78c1\u76d8\u5b58\u50a8\u6570\u636e\uff0c\u6700\u540e\u4e00\u4e2a\u78c1\u76d8\u5b58\u50a8\u6821\u9a8c\u4f4d\u3002<\/p>\n<p><img decoding=\"async\" src=\"http:\/\/img.doit.com.cn\/uploadpic\/2013\/0826\/0028011.png\" border=\"0\" \/><\/p>\n<p>\u5bf9\u4e8e\u4e00\u4e2a\u6570\u636e\u7684\u5199\u5165\uff0c\u6211\u4eec\u5047\u8bbe\u5728\u7b2c\u4e94\u4e2a\u78c1\u76d8\u4e0a\u5199\u5165\u7684\u6570\u636e\u4e3a1111\uff0c\u5982\u4e0b\u56fe\u6240\u793a\u3002\u90a3\u4e48\u6574\u4e2aRAID-5\u9700\u8981\u5b8c\u6210\u5199\u5165\u7684\u8fc7\u7a0b\u5206\u4e3a\u4ee5\u4e0b\u51e0\u6b65\uff1a<\/p>\n<p><img decoding=\"async\" src=\"http:\/\/img.doit.com.cn\/uploadpic\/2013\/0826\/0214891.png\" border=\"0\" \/><\/p>\n<p>1.\u8bfb\u53d6\u539f\u6570\u636e0110\uff0c\u7136\u540e\u4e0e\u65b0\u7684\u6570\u636e1111\u505aXOR\u64cd\u4f5c\uff1a 0110 XOR 1111 = 1001<\/p>\n<p>2.\u8bfb\u53d6\u539f\u6709\u7684\u6821\u9a8c\u4f4d0010<\/p>\n<p>3.\u7528\u7b2c\u4e00\u6b65\u7b97\u51fa\u7684\u6570\u503c\u4e0e\u539f\u6821\u9a8c\u4f4d\u518d\u505a\u4e00\u6b21XOR\u64cd\u4f5c\uff1a 0010 XOR 1001 = 1011<\/p>\n<p>4.\u7136\u540e\u5c061111\u65b0\u6570\u636e\u5199\u5165\u5230\u6570\u636e\u78c1\u76d8\uff0c\u5c06\u7b2c\u4e09\u6b65\u8ba1\u7b97\u51fa\u6765\u7684\u65b0\u7684\u6821\u9a8c\u4f4d\u5199\u5165\u6821\u9a8c\u76d8\u3002<\/p>\n<p>\u7531\u4e0a\u8ff0\u51e0\u4e2a\u6b65\u9aa4\u53ef\u89c1\uff0c\u5bf9\u4e8e\u4efb\u4f55\u4e00\u6b21\u5199\u5165\uff0c\u5728\u5b58\u50a8\u7aef\uff0c\u9700\u8981\u5206\u522b\u8fdb\u884c\u4e24\u6b21\u8bfb+\u4e24\u6b21\u5199\uff0c\u6240\u4ee5\u8bf4RAID-5\u7684Write Penalty\u7684\u503c\u662f4\u3002<br \/>&nbsp;<br \/><strong>\u4e0d\u540cRAID\u7ea7\u522b\u7684Write Penalty\uff1a<\/strong><\/p>\n<p>\u4e0b\u8868\u5217\u51fa\u4e86\u5404\u79cdRAID\u7ea7\u522b\u7684Write Penalty\u503c\uff1a<\/p>\n<p><img decoding=\"async\" src=\"http:\/\/img.doit.com.cn\/uploadpic\/2013\/0826\/0703461.jpg\" border=\"0\" \/><\/p>\n<p><strong>RAID-0\uff1a<\/strong>\u76f4\u63a5\u7684\u6761\u5e26\uff0c\u6570\u636e\u6bcf\u6b21\u5199\u5165\u5bf9\u5e94\u7269\u7406\u78c1\u76d8\u4e0a\u7684\u4e00\u6b21\u5199\u5165<\/p>\n<p><strong>RAID-1\u548c10\uff1a<\/strong>RAID-1 \u548cRAID-10\u7684\u5199\u60e9\u7f5a\u5f88\u7b80\u5355\u7406\u89e3\uff0c\u56e0\u4e3a\u6570\u636e\u7684\u955c\u50cf\u5b58\u5728\u7684\uff0c\u6240\u4ee5\u4e00\u6b21\u5199\u5165\u4f1a\u6709\u4e24\u6b21\u3002<\/p>\n<p><strong>RAID-5\uff1a<\/strong>RAID-5\u7531\u4e8e\u8981\u8ba1\u7b97\u6821\u9a8c\u4f4d\u7684\u673a\u5236\u5b58\u5728\uff0c\u9700\u8981\u8bfb\u6570\u636e\u3001\u8bfb\u6821\u9a8c\u4f4d\u3001\u5199\u6570\u636e\u3001\u5199\u6821\u9a8c\u4f4d\u56db\u4e2a\u6b65\u9aa4\uff0c\u6240\u4ee5RAID-5\u7684\u5199\u60e9\u7f5a\u503c\u662f4\u3002<\/p>\n<p><strong>RAID-6\uff1a<\/strong>RAID-6\u7531\u4e8e\u6709\u4e24\u4e2a\u6821\u9a8c\u4f4d\u7684\u5b58\u5728\uff0c\u4e0eRAID-5\u76f8\u6bd4\uff0c\u9700\u8981\u8bfb\u53d6\u4e24\u6b21\u6821\u9a8c\u4f4d\u548c\u5199\u5165\u4e24\u6b21\u6821\u9a8c\u4f4d\uff0c\u6240\u4ee5RAID-6\u7684\u5199\u60e9\u7f5a\u503c\u662f6\u3002<\/p>\n<p><strong>\u8ba1\u7b97IOPS:<\/strong><\/p>\n<p>\u6839\u636e\u4e0a\u6587\u7684\u63cf\u8ff0\uff0c\u5728\u5b9e\u9645\u5b58\u50a8\u65b9\u6848\u8bbe\u8ba1\u7684\u8fc7\u7a0b\u4e2d\uff0c\u8ba1\u7b97\u5b9e\u9645\u53ef\u7528IOPS\u7684\u8fc7\u7a0b\u4e2d\u5fc5\u987b\u7eb3\u5165RAID\u7684\u5199\u60e9\u7f5a\u8ba1\u7b97\u3002\u8ba1\u7b97\u7684\u516c\u5f0f\u5982\u4e0b\uff1a<\/p>\n<p>\u7269\u7406\u78c1\u76d8\u603b\u7684IOPS = \u7269\u7406\u78c1\u76d8\u7684IOPS &times; \u78c1\u76d8\u6570\u76ee<\/p>\n<p>\u53ef\u7528\u7684IOPS = \uff08\u7269\u7406\u78c1\u76d8\u603b\u7684IOPS &times; \u5199\u767e\u5206\u6bd4 &divide; RAID\u5199\u60e9\u7f5a\uff09 + \uff08\u7269\u7406\u78c1\u76d8\u603b\u7684IOPS &times; \u8bfb\u767e\u5206\u6bd4\uff09<\/p>\n<p>\u5047\u8bbe\u7ec4\u6210RAID-5\u7684\u7269\u7406\u78c1\u76d8\u603b\u5171\u53ef\u4ee5\u63d0\u4f9b500 IOPS\uff0c\u4f7f\u7528\u8be5\u5b58\u50a8\u7684\u5e94\u7528\u7a0b\u5e8f\u8bfb\u5199\u6bd4\u4f8b\u662f50%\/50%\uff0c\u90a3\u4e48\u5bf9\u4e8e\u524d\u7aef\u4e3b\u673a\u800c\u8a00\uff0c\u5b9e\u9645\u53ef\u7528\u7684IOPS\u662f\uff1a<\/p>\n<p>\uff08500 &times;50% &divide; 4\uff09+ ( 500 * 50%) = 312.5 IOPS<\/p>\n<p>\u672c\u6587\u4f5c\u8005\u4e3aEMC\u4e2d\u6587\u6280\u672f\u793e\u533a\uff08<a rel=\"nofollow\" href=\"https:\/\/community.emc.com\/go\/chinese\">https:\/\/community.emc.com\/go\/chinese<\/a>\uff09\u6280\u672f\u7248\u4e3b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4ecb\u7ecd \u901a\u5e38\u5728\u8ba8\u8bba\u4e0d\u540cRAID\u4fdd\u62a4\u7c7b\u578b\u7684\u6027\u80fd\u7684\u65f6\u5019\uff0c\u7ed3\u8bba\u90fd\u4f1a\u662fRAID-1\u63d0\u4f9b\u6bd4\u8f83\u597d\u7684\u8bfb\u5199\u6027\u80fd\uff0cRAID-5\u8bfb\u6027\u80fd\u4e0d\u9519\uff0c\u4f46\u662f\u5199\u5165\u6027\u80fd\u5c31\u4e0d\u5982RAID-1\uff0cRAID-6\u4fdd\u62a4\u7ea7\u522b\u66f4\u9ad8\uff0c\u4f46\u5199\u6027\u80fd\u76f8\u5bf9\u66f4\u52a0\u5dee\uff0cRAID10\u662f\u63d0\u4f9b\u6700\u597d\u7684\u6027\u80fd\u548c\u6570\u636e\u4fdd\u62a4\uff0c\u4e0d\u8fc7&#8230;<\/p>\n","protected":false},"author":107,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[4281,6203,3692,6202],"topic":[],"class_list":["post-10145","post","type-post","status-publish","format-standard","hentry","category-tips","tag-IOPS","tag-Penalty","tag-RAID","tag-Write"],"_links":{"self":[{"href":"https:\/\/www.homejamesfinance.com\/wp-json\/wp\/v2\/posts\/10145"}],"collection":[{"href":"https:\/\/www.homejamesfinance.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.homejamesfinance.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.homejamesfinance.com\/wp-json\/wp\/v2\/users\/107"}],"replies":[{"embeddable":true,"href":"https:\/\/www.homejamesfinance.com\/wp-json\/wp\/v2\/comments?post=10145"}],"version-history":[{"count":0,"href":"https:\/\/www.homejamesfinance.com\/wp-json\/wp\/v2\/posts\/10145\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.homejamesfinance.com\/wp-json\/wp\/v2\/media?parent=10145"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.homejamesfinance.com\/wp-json\/wp\/v2\/categories?post=10145"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.homejamesfinance.com\/wp-json\/wp\/v2\/tags?post=10145"},{"taxonomy":"topic","embeddable":true,"href":"https:\/\/www.homejamesfinance.com\/wp-json\/wp\/v2\/topic?post=10145"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}<a href="http://www.homejamesfinance.com/">&#x7CBE;&#x54C1;&#x56FD;&#x4EA7;&#x5348;&#x591C;&#x8089;&#x4F26;&#x4F26;&#x5F71;&#x9662;,&#x53CC;&#x6027;&#x8001;&#x5E08;&#x704C;&#x6EE1;&#x6D53;jing&#x4E0A;&#x8BFE;h,&#x5929;&#x5929;&#x505A;&#x5929;&#x5929;&#x7231;&#x591C;&#x591C;&#x723D;,&#x6535;&#x5973;&#x4E71;h&#x8FB9;&#x505A;&#x8FB9;&#x8D70;</a>
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