{"id":3687,"date":"2017-08-01T11:16:10","date_gmt":"2017-08-01T07:16:10","guid":{"rendered":"https:\/\/rakhesh.com\/?p=3687"},"modified":"2017-08-01T11:16:10","modified_gmt":"2017-08-01T07:16:10","slug":"script-to-run-esxcli-unmap-on-all-datastores-attached-to-an-esxi-host","status":"publish","type":"post","link":"https:\/\/rakhesh.com\/virtualization\/script-to-run-esxcli-unmap-on-all-datastores-attached-to-an-esxi-host\/","title":{"rendered":"Script to run esxcli unmap on all datastores attached to an ESXi host"},"content":{"rendered":"<p>It&#8217;s a good idea to <a href=\"https:\/\/kb.vmware.com\/kb\/2057513\">periodically run the UNMAP command<\/a> on all your thin-provisioned LUNs. This allows the storage system to reclaim deleted blocks. (<a href=\"https:\/\/kb.netapp.com\/support\/s\/article\/ka21A0000000fh9QAA\/faq-windows-scsi-unmap?language=en_US\">What is SCSI UNMAP?<\/a>)<\/p>\n<p>The format of the command is:<\/p>\n<pre class=\"lang:ps decode:true \">esxcli storage vmfs unmap -l &lt;volume_label&gt;<\/pre>\n<p>I wanted to make a script to run this on all attached datastores so here&#8217;s what I came up with:<\/p>\n<pre class=\"lang:ps decode:true \">#!\/bin\/sh\r\nfor datastore in `esxcli storage filesystem list | grep \"VMDATA\" | awk -F \" \" '{print $2}'`; do\r\n  echo \"Performing UNMAP on $datastore ...\"\r\n  esxcli storage vmfs unmap -l $datastore\r\ndone<\/pre>\n<p>The\u00a0<code>esxcli storage filesystem list<\/code> command outputs a list of datastores attached to the system. The second column is what I am interested in, so that&#8217;s what <code>awk<\/code> takes care for me. I don&#8217;t want to target any local datastores, so I use <code>grep<\/code> to filter out \u00a0the ones I am interested in.\u00a0<\/p>\n<p>Next step would be to add this to a <code>cron<\/code> job. Got to follow the instructions <a href=\"https:\/\/communities.vmware.com\/thread\/545078\">here<\/a>, it looks like.\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"<p>It&#8217;s a good idea to periodically run the UNMAP command on all your thin-provisioned LUNs. This allows the storage system to reclaim deleted blocks. (What is SCSI UNMAP?) The format of the command is: esxcli storage vmfs unmap -l &lt;volume_label&gt; I wanted to make a script to run this on all attached datastores so here&#8217;s &hellip; <a href=\"https:\/\/rakhesh.com\/virtualization\/script-to-run-esxcli-unmap-on-all-datastores-attached-to-an-esxi-host\/\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">Script to run esxcli unmap on all datastores attached to an ESXi host<\/span><\/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":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","enabled":false}}},"categories":[183],"tags":[264,526,764,763],"jetpack_publicize_connections":[],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/rakhesh.com\/wp-json\/wp\/v2\/posts\/3687"}],"collection":[{"href":"https:\/\/rakhesh.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/rakhesh.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/rakhesh.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/rakhesh.com\/wp-json\/wp\/v2\/comments?post=3687"}],"version-history":[{"count":0,"href":"https:\/\/rakhesh.com\/wp-json\/wp\/v2\/posts\/3687\/revisions"}],"wp:attachment":[{"href":"https:\/\/rakhesh.com\/wp-json\/wp\/v2\/media?parent=3687"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rakhesh.com\/wp-json\/wp\/v2\/categories?post=3687"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rakhesh.com\/wp-json\/wp\/v2\/tags?post=3687"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}