{"id":4901,"date":"2015-06-02T17:58:21","date_gmt":"2015-06-02T09:58:21","guid":{"rendered":"http:\/\/rmohan.com\/?p=4901"},"modified":"2015-06-02T17:58:47","modified_gmt":"2015-06-02T09:58:47","slug":"tweak-ext4-mount-options-for-performance","status":"publish","type":"post","link":"https:\/\/mohan.sg\/?p=4901","title":{"rendered":"Tweak EXT4 mount options for performance"},"content":{"rendered":"<div class=\"entry-content\">\n<p>Need to change default EXT4 mount options to tweek performance<\/p>\n<p>DEFAULT EXT4 mount options (Centos 6.3):<\/p>\n<div id=\"crayon-556d71bf3b040414194038\" class=\"crayon-syntax crayon-theme-classic crayon-font-monaco crayon-os-pc print-yes notranslate crayon-wrapped\" data-settings=\" minimize scroll-mouseover wrap\">\n<div class=\"crayon-toolbar\" data-settings=\" mouseover overlay hide delay\">\n<div class=\"crayon-tools\"><span class=\"crayon-language\">Shell<\/span><\/div>\n<\/div>\n<div class=\"crayon-plain-wrap\"><textarea class=\"crayon-plain print-no\" style=\"width: 844px; height: 17px;\" readonly=\"readonly\" data-settings=\"dblclick\">[root@server ~]# cat \/etc\/fstab&lt;br \/&gt;<br \/>\ndev\/sda1 \/ ext4 defaults 0 1<\/textarea><\/div>\n<div class=\"crayon-main\">\n<table class=\"crayon-table\" style=\"height: 25px;\" width=\"1084\">\n<tbody>\n<tr class=\"crayon-row\">\n<td class=\"crayon-nums \" data-settings=\"show\">\n<div class=\"crayon-nums-content\">\n<div class=\"crayon-num\" data-line=\"crayon-556d71bf3b040414194038-1\">1<\/div>\n<div class=\"crayon-num crayon-striped-num\" data-line=\"crayon-556d71bf3b040414194038-2\">2<\/div>\n<\/div>\n<\/td>\n<td class=\"crayon-code\">\n<div class=\"crayon-pre\">\n<div id=\"crayon-556d71bf3b040414194038-1\" class=\"crayon-line\"><span class=\"crayon-sy\">[<\/span><span class=\"crayon-i\">root<\/span><span class=\"crayon-sy\">@<\/span><span class=\"crayon-i\">server<\/span> <span class=\"crayon-o\">~<\/span><span class=\"crayon-sy\">]<\/span><span class=\"crayon-p\"># cat \/etc\/fstab<\/span><\/div>\n<div id=\"crayon-556d71bf3b040414194038-2\" class=\"crayon-line crayon-striped-line\"><span class=\"crayon-i\">dev<\/span><span class=\"crayon-o\">\/<\/span><span class=\"crayon-i\">sda1<\/span> <span class=\"crayon-o\">\/<\/span> <span class=\"crayon-e\">ext4 <\/span><span class=\"crayon-i\">defaults<\/span> <span class=\"crayon-cn\">0<\/span> <span class=\"crayon-cn\">1<\/span><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<p>\u2026 meaning \u2026<\/p>\n<div id=\"crayon-556d71bf3b04e885690844\" class=\"crayon-syntax crayon-theme-classic crayon-font-monaco crayon-os-pc print-yes notranslate crayon-wrapped\" data-settings=\" minimize scroll-mouseover wrap\">\n<div class=\"crayon-toolbar\" data-settings=\" mouseover overlay hide delay\">\n<div class=\"crayon-tools\"><span class=\"crayon-language\">Shell<\/span><\/div>\n<\/div>\n<div class=\"crayon-plain-wrap\"><textarea class=\"crayon-plain print-no\" style=\"width: 744px; height: 35px;\" readonly=\"readonly\" data-settings=\"dblclick\">[root@server ~]# cat \/proc\/mounts | grep ext4&lt;br \/&gt;<br \/>\n\/dev\/sda1 \/ ext4 rw,relatime,acl,barrier=1,data=ordered 0 0<\/textarea><\/div>\n<div class=\"crayon-main\">\n<table class=\"crayon-table\" style=\"height: 57px;\" width=\"819\">\n<tbody>\n<tr class=\"crayon-row\">\n<td class=\"crayon-nums \" data-settings=\"show\">\n<div class=\"crayon-nums-content\">\n<div class=\"crayon-num\" data-line=\"crayon-556d71bf3b04e885690844-1\">1<\/div>\n<div class=\"crayon-num crayon-striped-num\" data-line=\"crayon-556d71bf3b04e885690844-2\">2<\/div>\n<\/div>\n<\/td>\n<td class=\"crayon-code\">\n<div class=\"crayon-pre\">\n<div id=\"crayon-556d71bf3b04e885690844-1\" class=\"crayon-line\"><span class=\"crayon-sy\">[<\/span><span class=\"crayon-i\">root<\/span><span class=\"crayon-sy\">@<\/span><span class=\"crayon-i\">server<\/span> <span class=\"crayon-o\">~<\/span><span class=\"crayon-sy\">]<\/span><span class=\"crayon-p\"># cat \/proc\/mounts | grep ext4<\/span><\/div>\n<div id=\"crayon-556d71bf3b04e885690844-2\" class=\"crayon-line crayon-striped-line\"><span class=\"crayon-o\">\/<\/span><span class=\"crayon-i\">dev<\/span><span class=\"crayon-o\">\/<\/span><span class=\"crayon-i\">sda1<\/span> <span class=\"crayon-o\">\/<\/span> <span class=\"crayon-e\">ext4 <\/span><span class=\"crayon-i\">rw<\/span><span class=\"crayon-sy\">,<\/span><span class=\"crayon-i\">relatime<\/span><span class=\"crayon-sy\">,<\/span><span class=\"crayon-i\">acl<\/span><span class=\"crayon-sy\">,<\/span><span class=\"crayon-v\">barrier<\/span><span class=\"crayon-o\">=<\/span><span class=\"crayon-cn\">1<\/span><span class=\"crayon-sy\">,<\/span><span class=\"crayon-v\">data<\/span><span class=\"crayon-o\">=<\/span><span class=\"crayon-i\">ordered<\/span> <span class=\"crayon-cn\">0<\/span> <span class=\"crayon-cn\">0<\/span><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<p>CHANGE it (\/etc\/fstab) to:<\/p>\n<div id=\"crayon-556d71bf3b056564280784\" class=\"crayon-syntax crayon-theme-classic crayon-font-monaco crayon-os-pc print-yes notranslate crayon-wrapped\" data-settings=\" minimize scroll-mouseover wrap\">\n<div class=\"crayon-toolbar\" data-settings=\" mouseover overlay hide delay\">\n<div class=\"crayon-tools\"><span class=\"crayon-language\">Shell<\/span><\/div>\n<\/div>\n<div class=\"crayon-plain-wrap\"><textarea class=\"crayon-plain print-no\" style=\"width: 879px; height: 43px;\" readonly=\"readonly\" data-settings=\"dblclick\">dev\/sda1 \/ ext4 rw,noatime,nouser_xattr,barrier=0,data=ordered,errors=remount-ro 0 1<\/textarea><\/div>\n<div class=\"crayon-main\">\n<table class=\"crayon-table\">\n<tbody>\n<tr class=\"crayon-row\">\n<td class=\"crayon-nums \" data-settings=\"show\">\n<div class=\"crayon-nums-content\">\n<div class=\"crayon-num\" data-line=\"crayon-556d71bf3b056564280784-1\">1<\/div>\n<\/div>\n<\/td>\n<td class=\"crayon-code\">\n<div class=\"crayon-pre\">\n<div id=\"crayon-556d71bf3b056564280784-1\" class=\"crayon-line\"><span class=\"crayon-i\">dev<\/span><span class=\"crayon-o\">\/<\/span><span class=\"crayon-i\">sda1<\/span> <span class=\"crayon-o\">\/<\/span> <span class=\"crayon-e\">ext4 <\/span><span class=\"crayon-i\">rw<\/span><span class=\"crayon-sy\">,<\/span><span class=\"crayon-i\">noatime<\/span><span class=\"crayon-sy\">,<\/span><span class=\"crayon-i\">nouser_xattr<\/span><span class=\"crayon-sy\">,<\/span><span class=\"crayon-v\">barrier<\/span><span class=\"crayon-o\">=<\/span><span class=\"crayon-cn\">0<\/span><span class=\"crayon-sy\">,<\/span><span class=\"crayon-v\">data<\/span><span class=\"crayon-o\">=<\/span><span class=\"crayon-i\">ordered<\/span><span class=\"crayon-sy\">,<\/span><span class=\"crayon-v\">errors<\/span><span class=\"crayon-o\">=<\/span><span class=\"crayon-i\">remount<\/span><span class=\"crayon-o\">&#8211;<\/span><span class=\"crayon-i\">ro<\/span> <span class=\"crayon-cn\">0<\/span> <span class=\"crayon-cn\">1<\/span><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<p><strong>EXPLANATION<\/strong>:<\/p>\n<ul>\n<li><strong>noatime<\/strong> \u2013 don\u2019t modify last access time on folders and files (not needed)<\/li>\n<li><strong>nouser_xattr <\/strong>&#8211; don\u2019t write extended user atributes (not needed)<\/li>\n<li><strong>barrier=0 \u00a0<\/strong>&#8211; turn off write barriers, improved write speed on CloudSigma SSD storage by <strong>300%<\/strong> !!!<\/li>\n<li><strong>data=ordered <\/strong>&#8211; default, no change really<\/li>\n<li><strong>errors=remount-ro <\/strong>&#8211; if errors, remount FS in read only mode (not performance, \u00a0but very important)<\/li>\n<\/ul>\n<\/div>\n","protected":false},"excerpt":{"rendered":"\n<p>Need to change default EXT4 mount options to tweek performance<\/p>\n<p>DEFAULT EXT4 mount options (Centos 6.3):<\/p>\n<p> Shell [root@server ~]# cat \/etc\/fstab&lt;br \/&gt; dev\/sda1 \/ ext4 defaults 0 1 1 2 [root@server ~]# cat \/etc\/fstab dev\/sda1 \/ ext4 defaults 0 1 <\/p>\n<p>\u2026 meaning \u2026<\/p>\n<p> Shell [root@server ~]# cat \/proc\/mounts | grep ext4&lt;br \/&gt; \/dev\/sda1 \/ [&#8230;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5,73],"tags":[],"_links":{"self":[{"href":"https:\/\/mohan.sg\/index.php?rest_route=\/wp\/v2\/posts\/4901"}],"collection":[{"href":"https:\/\/mohan.sg\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mohan.sg\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mohan.sg\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mohan.sg\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4901"}],"version-history":[{"count":2,"href":"https:\/\/mohan.sg\/index.php?rest_route=\/wp\/v2\/posts\/4901\/revisions"}],"predecessor-version":[{"id":4903,"href":"https:\/\/mohan.sg\/index.php?rest_route=\/wp\/v2\/posts\/4901\/revisions\/4903"}],"wp:attachment":[{"href":"https:\/\/mohan.sg\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4901"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mohan.sg\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4901"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mohan.sg\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4901"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}