{"id":9786,"date":"2009-07-21T17:37:00","date_gmt":"1999-11-29T20:00:00","guid":{"rendered":"https:\/\/aidanfinn.com\/?p=9786"},"modified":"2009-07-21T17:37:00","modified_gmt":"1999-11-29T20:00:00","slug":"vmware-vsphere-4-distributed-power-management","status":"publish","type":"post","link":"https:\/\/aidanfinn.com\/?p=9786","title":{"rendered":"VMware vSphere 4 Distributed Power Management"},"content":{"rendered":"<p>This <a title=\"post\" href=\"http:\/\/vmblog.com\/archive\/2009\/07\/21\/vmware-vsphere-4-slashes-power-use-in-the-datacenter-with-distributed-power-management.aspx\">post<\/a> talks about VMware\u2019s DPM.\u00a0 DPM is a cool feature of VMware\u2019s solution.\u00a0 When host server utilisation is low, vSphere will VMotion VM\u2019s to fewer host servers.\u00a0 This is possible thanks to VMFS, VMotion and RAM oversubscription.\u00a0 Idle host servers with no VM\u2019s are then powered off.\u00a0 That could potentially save a fortune in electrical costs.\u00a0 When host server resource utilisation increases then those powered off servers are powered up automatically as required.\u00a0 VM\u2019s are relocated to spread the resource utilisation load.<\/p>\n<p>Windows Server 2008 and Windows Server 2008 R2 Hyper-V do not have this.\u00a0 I can see how it could be done using OpsMgr and VMM 2008 R2.\u00a0 Windows Server 2008 R2 has Live Migration (VMotion) and Cluster Shared Volume (aka CSV or VMFS).\u00a0 However, Hyper-V does not have RAM oversubscription.\u00a0 It was in the early feature list for 2008 R2 last year but MS had to pull it because it wasn\u2019t ready.\u00a0 I know from talking to others that this is a highly desired feature so it won\u2019t surprise me to see it in Windows Server 8.<\/p>\n<p>Windows Server 2008 Hyper-V approaches power savings from another direction by consolidation resource usage in the server, rather than across the server farm.\u00a0 Honestly, I\u2019d like both.\u00a0 2008 R2 includes Core Parking.\u00a0 When the host OS notices idle CPU cores, they get powered down and the work load is consolidated to fewer cores.\u00a0 Powering down the cores\/CPU\u2019s saves CPU power utilisation, reduces heat generation, reduces fan power utilisation and reduces air conditioning power utilisation.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>This post talks about VMware\u2019s DPM.\u00a0 DPM is a cool feature of VMware\u2019s solution.\u00a0 When host server utilisation is low, vSphere will VMotion VM\u2019s to fewer host servers.\u00a0 This is possible thanks to VMFS, VMotion and RAM oversubscription.\u00a0 Idle host servers with no VM\u2019s are then powered off.\u00a0 That could potentially save a fortune in &hellip; <a href=\"https:\/\/aidanfinn.com\/?p=9786\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;VMware vSphere 4 Distributed Power Management&#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":[20],"tags":[],"class_list":["post-9786","post","type-post","status-publish","format-standard","hentry","category-hyper-v"],"aioseo_notices":[],"jetpack_featured_media_url":"","amp_enabled":true,"_links":{"self":[{"href":"https:\/\/aidanfinn.com\/index.php?rest_route=\/wp\/v2\/posts\/9786","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=9786"}],"version-history":[{"count":0,"href":"https:\/\/aidanfinn.com\/index.php?rest_route=\/wp\/v2\/posts\/9786\/revisions"}],"wp:attachment":[{"href":"https:\/\/aidanfinn.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=9786"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aidanfinn.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=9786"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aidanfinn.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=9786"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}