{"id":34,"date":"2008-11-03T16:29:53","date_gmt":"2008-11-03T14:29:53","guid":{"rendered":"http:\/\/www.superkikim.com\/?p=34"},"modified":"2016-08-18T13:08:23","modified_gmt":"2016-08-18T11:08:23","slug":"test-de-performance-disque-sur-linux","status":"publish","type":"post","link":"https:\/\/akim.sissaoui.com\/en\/informatique\/test-de-performance-disque-sur-linux\/","title":{"rendered":"Test de performances disque sur Linux"},"content":{"rendered":"<p>Un moyen simple de faire un rapide test de performance sur Linux, avec dd:<\/p>\n<p>Le test d&#8217;\u00e9criture:<\/p>\n<pre lang=\"bash\">time sh -c \"dd if=\/dev\/zero of=\/home\/test bs=4096 count=2097152 &amp;&amp; sync\"<\/pre>\n<p>Dans cet exemple, on cr\u00e9e un fichier \/home\/test dans lequel on va \u00e9crire un 2097152 blocks de 4KB, cette taille de block \u00e9tant la taille par d\u00e9faut de ext3. Ce qui va nous donner un fichier de 8GB. dd retournera ensuite la temps et la bande passante utilis\u00e9e.<\/p>\n<p>Le test de lecture:<\/p>\n<pre lang=\"bash\">time sh -c \"dd if=\/home\/test of=\/dev\/null bs=4096 count=2097152 &amp;&amp; sync\"<\/pre>\n<p>Ici, on lit le m\u00eame fichier de 8GB, (on l&#8217;envoie dans \/dev\/null). dd nous retournera les m\u00eames informations. Mais il s&#8217;agit maintenant de lecture disque.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Un moyen simple de faire un rapide test de performance sur Linux, avec dd: Le test d&#8217;\u00e9criture: time sh -c &#8220;dd if=\/dev\/zero of=\/home\/test bs=4096 count=2097152 &amp;&amp; sync&#8221; Dans cet exemple, on cr\u00e9e un fichier \/home\/test dans lequel on va \u00e9crire un 2097152 blocks de 4KB, cette taille de block \u00e9tant la taille par d\u00e9faut de [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[220],"tags":[56,69],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/akim.sissaoui.com\/en\/wp-json\/wp\/v2\/posts\/34"}],"collection":[{"href":"https:\/\/akim.sissaoui.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/akim.sissaoui.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/akim.sissaoui.com\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/akim.sissaoui.com\/en\/wp-json\/wp\/v2\/comments?post=34"}],"version-history":[{"count":7,"href":"https:\/\/akim.sissaoui.com\/en\/wp-json\/wp\/v2\/posts\/34\/revisions"}],"predecessor-version":[{"id":1602,"href":"https:\/\/akim.sissaoui.com\/en\/wp-json\/wp\/v2\/posts\/34\/revisions\/1602"}],"wp:attachment":[{"href":"https:\/\/akim.sissaoui.com\/en\/wp-json\/wp\/v2\/media?parent=34"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/akim.sissaoui.com\/en\/wp-json\/wp\/v2\/categories?post=34"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/akim.sissaoui.com\/en\/wp-json\/wp\/v2\/tags?post=34"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}