{"id":3668,"date":"2013-01-15T22:59:26","date_gmt":"2013-01-15T13:59:26","guid":{"rendered":"http:\/\/umezawa.dyndns.info\/wordpress\/?p=3668"},"modified":"2013-01-16T10:58:46","modified_gmt":"2013-01-16T01:58:46","slug":"linux-%e3%81%a7-ssd","status":"publish","type":"post","link":"http:\/\/umezawa.dyndns.info\/wordpress\/?p=3668","title":{"rendered":"Linux \u3067 SSD"},"content":{"rendered":"<p>\u5c0f\u3055\u3044\u30de\u30b7\u30f3\u3092\u7121\u97f3\u306a\u81ea\u5b85\u5185\u30b5\u30d6\u76e3\u8996\u30de\u30b7\u30f3\u3068\u3057\u3066\u30bb\u30c3\u30c8\u30a2\u30c3\u30d7\u3059\u308b\u305f\u3081\u306b SSD \u3092\u8cb7\u3063\u3066\u304d\u307e\u3057\u305f\u300216GB \u3082\u3042\u308c\u3070\u5341\u5206\u306a\u306e\u3067 USB \u30e1\u30e2\u30ea\u306a\u30891000\u5186\u7a0b\u5ea6\u306b\u306a\u308b\u306e\u3067\u3059\u304c\u3001USB \u30e1\u30e2\u30ea\u3060\u3068\u305f\u3076\u3093\u30a6\u30a7\u30a2\u30ec\u3079\u30ea\u30f3\u30b0\u3057\u3066\u304f\u308c\u306a\u3044\u306f\u305a\u3067\u4e0d\u5b89\u306a\u306e\u3067 SSD \u306b\u3057\u307e\u3057\u305f\u3002\u8cb7\u3063\u3066\u304d\u305f\u306e\u306f Crucial v4 32GB\u3002\u7d044000\u5186\u4e5f\u3002<\/p>\n<p><!--more--><\/p>\n<p>SSD \u3068\u3044\u3046\u3068\u30d1\u30fc\u30c6\u30a3\u30b7\u30e7\u30f3\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u3084 Trim \u5bfe\u5fdc\u304c\u6c17\u306b\u306a\u308b\u308f\u3051\u3067\u3059\u304c\u3001RHEL 6 \u306a\u3089\u3069\u3061\u3089\u3082\u5927\u4e08\u592b\u306a\u3088\u3046\u3067\u3059\u3002<a href=\"https:\/\/access.redhat.com\/knowledge\/docs\/en-US\/Red_Hat_Enterprise_Linux\/6\/html\/Storage_Administration_Guide\/newmds-ssdtuning.html\">\u53c2\u8003<\/a><\/p>\n<ul>\n<li>\u666e\u901a\u306b\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3059\u308b\u3068 2048 \u30bb\u30af\u30bf\u76ee\uff08\u3053\u3053\u3067\u306f 512 \u30d0\u30a4\u30c8\u30bb\u30af\u30bf\u3092\u4eee\u5b9a\u3057\u3066\u3044\u308b\u306e\u3067 1MB \u306e\u4f4d\u7f6e\uff09\u306b\u6700\u521d\u306e\u30d1\u30fc\u30c6\u30a3\u30b7\u30e7\u30f3\u3092\u4f5c\u3089\u308c\u308b\u3002<\/li>\n<li>\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u306b ext4 \u3092\u4f7f\u3044\u3001\u30de\u30a6\u30f3\u30c8\u30aa\u30d7\u30b7\u30e7\u30f3\u306b discard \u3092\u8ffd\u52a0\u3059\u308b\u3068 Trim \u304c\u6709\u52b9\u306b\u306a\u308b\u3002\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u306f discard \u306f\u4ed8\u304b\u306a\u3044\u306e\u3067\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u5f8c\u306b fstab \u3092\u7de8\u96c6\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002\u306a\u304a\u3001\u3053\u306e\u6a5f\u80fd\u306f kernel 2.6.33 \u3067\u8ffd\u52a0\u3055\u308c\u305f\u3089\u3057\u3044\u304c\u3001RHEL 6 \u306e kernel 2.6.32 \u306b\u30d0\u30c3\u30af\u30dd\u30fc\u30c8\u3055\u308c\u3066\u3044\u308b\u3002<\/li>\n<li>SSD \u3092 md \u30c7\u30d0\u30a4\u30b9\u306e\u914d\u4e0b\u306b\u3059\u308b\u3068 Trim \u304c\u52b9\u304b\u306a\u304f\u306a\u308b\u3002\u4ee3\u308f\u308a\u306b LVM \u3092\u4f7f\u3046\u3002<\/li>\n<li>\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2 RAID \u306b\u304a\u3044\u3066\u3001RAID0 \u4ee5\u5916\u306e RAID \u306f\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u6025\u6fc0\u306b\u4f4e\u4e0b\u3055\u305b\u308b\u306e\u3067\u63a8\u5968\u3055\u308c\u306a\u3044\u3002<\/li>\n<li>\u30b9\u30ef\u30c3\u30d7\u30d1\u30fc\u30c6\u30a3\u30b7\u30e7\u30f3\u306b\u95a2\u3057\u3066\u306f\u4f55\u3082\u66f8\u304b\u306a\u304f\u3066\u3082\u52dd\u624b\u306b Trim \u304c\u6709\u52b9\u306b\u306a\u308b\u3002<\/li>\n<\/ul>\n<p>\u3042\u3068\u3001\u5bff\u547d\u3092\u5ef6\u3070\u3059\u89b3\u70b9\u304b\u3089\u3082 \/tmp \u4ee5\u5916\u306f\u30de\u30a6\u30f3\u30c8\u30aa\u30d7\u30b7\u30e7\u30f3\u306b noatime \u3092\u8ffd\u52a0\u3057\u3066\u304a\u3044\u305f\u65b9\u304c\u826f\u3044\u304b\u3068\u601d\u3044\u307e\u3059\u3002\/tmp \u4ee5\u5916\u3067 atime \u304c\u8a18\u9332\u3055\u308c\u308b\u3053\u3068\u304c\u671f\u5f85\u3055\u308c\u308b\u72b6\u6cc1\u306f\u3042\u307e\u308a\u306a\u3044\u306e\u3067\u3002\/tmp \u3092 ramdisk (tmpfs) \u306b\u8ffd\u3044\u51fa\u3059\u3068\u5bff\u547d\u7684\u306b\u306f\u306a\u304a\u826f\u3057\u3067\u3059\u304c\u3001\u30e1\u30e2\u30ea\u5bb9\u91cf\u3068\u8981\u76f8\u8ac7\u3067\u3059\u3002<\/p>\n<hr \/>\n<p>\u3042\u3042\u3001\u3082\u3061\u308d\u3093 RHEL \u306a\u3093\u3066\u8cb7\u3048\u306a\u3044\u306e\u3067 CentOS \u3067\u3059\u3051\u3069\u306d\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5c0f\u3055\u3044\u30de\u30b7\u30f3\u3092\u7121\u97f3\u306a\u81ea\u5b85\u5185\u30b5\u30d6\u76e3\u8996\u30de\u30b7\u30f3\u3068\u3057\u3066\u30bb\u30c3\u30c8\u30a2\u30c3\u30d7\u3059\u308b\u305f\u3081\u306b SSD \u3092\u8cb7\u3063\u3066\u304d\u307e\u3057\u305f\u300216GB \u3082\u3042\u308c\u3070\u5341\u5206\u306a\u306e\u3067 USB \u30e1\u30e2\u30ea\u306a\u30891000\u5186\u7a0b\u5ea6\u306b\u306a\u308b\u306e\u3067\u3059\u304c\u3001USB \u30e1\u30e2\u30ea\u3060\u3068\u305f\u3076\u3093\u30a6\u30a7\u30a2\u30ec\u3079\u30ea\u30f3\u30b0\u3057\u3066\u304f [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[27],"tags":[],"class_list":["post-3668","post","type-post","status-publish","format-standard","hentry","category-technology"],"_links":{"self":[{"href":"http:\/\/umezawa.dyndns.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/3668","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/umezawa.dyndns.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/umezawa.dyndns.info\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/umezawa.dyndns.info\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/umezawa.dyndns.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3668"}],"version-history":[{"count":3,"href":"http:\/\/umezawa.dyndns.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/3668\/revisions"}],"predecessor-version":[{"id":3670,"href":"http:\/\/umezawa.dyndns.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/3668\/revisions\/3670"}],"wp:attachment":[{"href":"http:\/\/umezawa.dyndns.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3668"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/umezawa.dyndns.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3668"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/umezawa.dyndns.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3668"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}