{"id":1880,"date":"2011-09-13T05:37:22","date_gmt":"2011-09-13T05:37:22","guid":{"rendered":"http:\/\/enjoyasp.net\/?p=1880"},"modified":"2011-09-13T23:53:09","modified_gmt":"2011-09-13T23:53:09","slug":"ldf%e6%96%87%e4%bb%b6%e4%b8%8emdf%e6%96%87%e4%bb%b6%e6%94%be%e5%9c%a8%e4%b8%8d%e5%90%8c%e7%a3%81%e7%9b%98%e5%8f%af%e6%8f%90%e9%ab%98%e6%80%a7%e8%83%bd%e7%9a%84%e5%8e%9f%e5%9b%a0","status":"publish","type":"post","link":"https:\/\/enjoyasp.net\/index.php\/2011\/09\/13\/ldf%e6%96%87%e4%bb%b6%e4%b8%8emdf%e6%96%87%e4%bb%b6%e6%94%be%e5%9c%a8%e4%b8%8d%e5%90%8c%e7%a3%81%e7%9b%98%e5%8f%af%e6%8f%90%e9%ab%98%e6%80%a7%e8%83%bd%e7%9a%84%e5%8e%9f%e5%9b%a0\/","title":{"rendered":"ldf\u6587\u4ef6\u4e0emdf\u6587\u4ef6\u653e\u5728\u4e0d\u540c\u78c1\u76d8\u53ef\u63d0\u9ad8\u6027\u80fd\u7684\u539f\u56e0"},"content":{"rendered":"<p>\u78c1\u76d8\u8d1f\u8d23\u4e09\u65b9\u9762\uff0c\u4e00\u4e2a\u5c06\u6570\u636e\u5199\u5165\u5230\u65e5\u5fd7\u6587\u4ef6ldf\u4e2d\uff0c\u7136\u540e\u5728check point\u540e\u5199\u5165\u5230mdf, \u63a5\u7740\u5c31\u662f\u5927\u91cf\u7684\u8bfb\u64cd\u4f5c\u3002<br \/>\n\u5148\u5199\u5165ldf,\u662f\u56e0\u4e3asql server\u7684\u9884\u5199\u65e5\u5fd7\u673a\u5236\u5f15\u8d77\u7684\uff0c\u6b64\u673a\u5236\u4fdd\u8bc1\u4e86\u6570\u636e\u5728\u5199\u5165\u5230mdf\u4e2d\u524d\uff0c\u4e00\u5b9a\u4f1a\u5728ldf\u4e2d\u4fdd\u7559\u4e00\u4efd\uff0c\u8fd9\u6837\u4ee5\u540e\u6062\u590d\u7b49\u64cd\u4f5c\u90fd\u53ef\u8fdb\u884c\uff0c\u6545\u53ef\u4ee5\u8bf4\uff0c\u5f71\u54cd\u5199\u6027\u80fd\u7684\u4e3b\u8981\u662f\u5199\u5165\u5230ldf\u4e2d\u7684\u64cd\u4f5c\u3002\u78c1\u76d8\u4e00\u8fb9\u8d1f\u8d23\u968f\u673a\u53d6\u6570\u636e\uff0c\u4e00\u8fb9\u8d1f\u8d23\u5199\u5165\u6570\u636e\uff0c\u78c1\u5934\u8f6c\u6765\u53d8\u53bb\uff0c\u6027\u80fd\u4f4e\u4e0b\uff0c\u800c\u5c06ldf\u6587\u4ef6\u653e\u5728\u4e0d\u540c\u7684\u78c1\u76d8\u4e2d\uff0c\u5c31\u72ec\u7acb\u4e86\u5199\u64cd\u4f5c\u3002<br \/>\n\u6ce8\u610f\uff1a\u78c1\u76d8\u5e94\u662f\u7269\u7406\u4e0a\u7684\u3002<\/p>\n<p>Other logical drive will not benefit because ultimately, it&#8217;s the same drive controller and the same physical disc. Hence, if the heads are busy doing random reads for a logical drive D, they won&#8217;t be able to perform serial writes on logical drive E on the same physical drive.<\/p>\n<p>Hence, the log should be given the priviledge of it&#8217;s own separate physical drive.<br \/>\n\u5f15\u81ea\uff1a<br \/>\n<a href=\"http:\/\/beyondrelational.com\/blogs\/nakul\/archive\/2011\/09\/01\/performance-best-practice-transaction-log-must-on-a-different-drive-but-why.aspx\">Performance Best practice &#8211; Transaction log must on a different drive. But WHY?<\/a><br \/>\n<a href=\"http:\/\/msdn.microsoft.com\/en-us\/library\/ms186259.aspx\">Write-Ahead Transaction Log<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u78c1\u76d8\u8d1f\u8d23\u4e09\u65b9\u9762\uff0c\u4e00\u4e2a\u5c06\u6570\u636e\u5199\u5165\u5230\u65e5\u5fd7\u6587\u4ef6ldf\u4e2d\uff0c\u7136\u540e\u5728check point\u540e\u5199\u5165\u5230mdf, \u63a5\u7740\u5c31\u662f\u5927\u91cf\u7684 [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[36],"tags":[],"class_list":["post-1880","post","type-post","status-publish","format-standard","hentry","category-sql-server"],"blocksy_meta":[],"_links":{"self":[{"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/posts\/1880","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/comments?post=1880"}],"version-history":[{"count":0,"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/posts\/1880\/revisions"}],"wp:attachment":[{"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/media?parent=1880"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/categories?post=1880"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/tags?post=1880"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}