{"id":8618,"date":"2006-11-07T12:49:00","date_gmt":"1999-11-29T20:00:00","guid":{"rendered":"https:\/\/aidanfinn.com\/?p=8618"},"modified":"2006-11-07T12:49:00","modified_gmt":"1999-11-29T20:00:00","slug":"update-brightstor-11-5-disk-staging-option","status":"publish","type":"post","link":"https:\/\/aidanfinn.com\/?p=8618","title":{"rendered":"Update: Brightstor 11.5 Disk Staging Option"},"content":{"rendered":"<div>\n<p>After the <a href=\"http:\/\/joeelway.spaces.live.com\/blog\/cns!2095EAC3772C41DB!240.entry\">first backup<\/a> (a differential) we found the backup server CPU (max 85%) and RAM (around 60%) handled having 10 simultaneous streams.\u00a0 The 1GB NIC appeared to be 50% utilised.\u00a0 What was interesting was that the MSA1500 being used for disk staging was hammered.\u00a0 Current Disk Queue Length was spiking quite frequently at 27 &#8230; well above the recommended maximum of 2!\u00a0 Seeing as the system isn&#8217;t interactive we&#8217;re not too worried but the disk (RAID 5 &#8230; slow, I know) or controller (shared with other systems that are heavily used at night) could be our bottlenecks.\u00a0 This new bottleneck was not considered in our estimations.\u00a0 I never though disk would be a bottleneck before the NIC.\u00a0 A comparison against a similar job saw agent-tape being 8.5 hours (total 8.5), agent-disk being 3.5 hours and disk to tape being 1 hour (total 4.5 hours).\u00a0 That&#8217;s nearly a 50% reduction on our impact on production systems for backup.\u00a0 We want to find our optimum setting for concurrent streams.\u00a0 The only true test is to suck it and see.\u00a0 Tonight, we will run 15 streams at once.\u00a0 We&#8217;ll then compare against a previous Tuesday differential job from another week and see what the time savings were.\u00a0 After that, we&#8217;ll try 5 streams and see what the trends are.<\/p>\n<p>I mentioned that we had to call in tapes for file recovery.\u00a0 The file server is Windows 2003 and I would normally utilise Volume Shadow Copy and make use fo the Previous Versions Client for operational file recoveries.\u00a0 However, the file server is struggling with disk space so this is not an option.<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>After the first backup (a differential) we found the backup server CPU (max 85%) and RAM (around 60%) handled having 10 simultaneous streams.\u00a0 The 1GB NIC appeared to be 50% utilised.\u00a0 What was interesting was that the MSA1500 being used for disk staging was hammered.\u00a0 Current Disk Queue Length was spiking quite frequently at 27 &hellip; <a href=\"https:\/\/aidanfinn.com\/?p=8618\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;Update: Brightstor 11.5 Disk Staging Option&#8221;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-8618","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"aioseo_notices":[],"jetpack_featured_media_url":"","amp_enabled":true,"_links":{"self":[{"href":"https:\/\/aidanfinn.com\/index.php?rest_route=\/wp\/v2\/posts\/8618","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/aidanfinn.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/aidanfinn.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/aidanfinn.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/aidanfinn.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=8618"}],"version-history":[{"count":0,"href":"https:\/\/aidanfinn.com\/index.php?rest_route=\/wp\/v2\/posts\/8618\/revisions"}],"wp:attachment":[{"href":"https:\/\/aidanfinn.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=8618"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aidanfinn.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=8618"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aidanfinn.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=8618"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}