{"id":1143,"date":"2016-08-25T15:32:43","date_gmt":"2016-08-25T07:32:43","guid":{"rendered":"http:\/\/cn.hostease.com\/xueyuan\/?p=1143"},"modified":"2016-08-25T15:32:43","modified_gmt":"2016-08-25T07:32:43","slug":"linux-%e7%a1%ac%e7%9b%98%e8%af%bb%e5%86%99%e9%80%9f%e5%ba%a6%e6%a3%80%e6%b5%8b","status":"publish","type":"post","link":"https:\/\/cn.hostease.com\/xueyuan\/hemanual\/linux-%e7%a1%ac%e7%9b%98%e8%af%bb%e5%86%99%e9%80%9f%e5%ba%a6%e6%a3%80%e6%b5%8b\/","title":{"rendered":"Linux-\u786c\u76d8\u8bfb\u5199\u901f\u5ea6\u68c0\u6d4b"},"content":{"rendered":"<p>&lt;1&gt;\u4f7f\u7528hdparm\u68c0\u67e5\u786c\u76d8\/\u786c\u76d8\u7f13\u5b58\u7684\u8bfb\u5199\u901f\u5ea6<\/p>\n<p>[root@sqj ~]# hdparm -t \/dev\/vda<\/p>\n<p>&nbsp;<\/p>\n<p>\/dev\/vda:<\/p>\n<p>Timing buffered disk reads: 416 MB in \u00a03.00 seconds = 138.55 MB\/sec<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>[root@sqj ~]# hdparm -T \/dev\/vda<\/p>\n<p>&nbsp;<\/p>\n<p>\/dev\/vda:<\/p>\n<p>Timing cached reads: \u00a0\u00a010120 MB in \u00a01.99 seconds = 5075.91 MB\/sec<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&lt;2&gt;\u4f7f\u7528dd\u547d\u4ee4\u6d4b\u8bd5\u786c\u76d8\u7684\u8bfb\u5199\u901f\u5ea6<\/p>\n<p>[root@sqj ~]# dd if=\/dev\/zero bs=1024 count=10000 of=\/root\/test<\/p>\n<p>10000+0 records in<\/p>\n<p>10000+0 records out<\/p>\n<p>10240000 bytes (10 MB) copied, 0.0803855 s, 127 MB\/s<\/p>\n<p>&nbsp;<\/p>\n<p>[root@sqj ~]# dd if=\/root\/test bs=64k | dd of=\/dev\/null<\/p>\n<p>156+1 records in<\/p>\n<p>156+1 records out<\/p>\n<p>10240000 bytes (10 MB) copied, 0.189066 s, 54.2 MB\/s<\/p>\n<p>20000+0 records in<\/p>\n<p>20000+0 records out<\/p>\n<p>10240000 bytes (10 MB) copied, 0.188698 s, 54.3 MB\/s<\/p>\n","protected":false},"excerpt":{"rendered":"<p>&lt;1&gt;\u4f7f\u7528hdparm\u68c0\u67e5\u786c\u76d8\/\u786c\u76d8\u7f13\u5b58\u7684\u8bfb\u5199\u901f\u5ea6 [root@sqj ~]# hdparm -t &#8230; <a title=\"Linux-\u786c\u76d8\u8bfb\u5199\u901f\u5ea6\u68c0\u6d4b\" class=\"read-more\" href=\"https:\/\/cn.hostease.com\/xueyuan\/hemanual\/linux-%e7%a1%ac%e7%9b%98%e8%af%bb%e5%86%99%e9%80%9f%e5%ba%a6%e6%a3%80%e6%b5%8b\/\" aria-label=\"\u9605\u8bfb Linux-\u786c\u76d8\u8bfb\u5199\u901f\u5ea6\u68c0\u6d4b\">\u9605\u8bfb\u66f4\u591a<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[3,49],"tags":[401,402,38],"class_list":["post-1143","post","type-post","status-publish","format-standard","hentry","category-hemanual","category-linux","tag-dd","tag-hdparm","tag-linux"],"aioseo_notices":[],"jetpack_featured_media_url":"","jetpack-related-posts":[],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/posts\/1143","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/comments?post=1143"}],"version-history":[{"count":1,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/posts\/1143\/revisions"}],"predecessor-version":[{"id":1144,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/posts\/1143\/revisions\/1144"}],"wp:attachment":[{"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/media?parent=1143"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/categories?post=1143"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/tags?post=1143"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}