{"id":8001,"date":"2015-09-10T20:54:02","date_gmt":"2015-09-11T12:54:02","guid":{"rendered":"http:\/\/vspherestorage.com\/?p=8001"},"modified":"2015-09-10T20:54:03","modified_gmt":"2015-09-11T04:54:03","slug":"how-many-fault-domains-4","status":"publish","type":"post","link":"https:\/\/vspherestorage.com\/?p=8001","title":{"rendered":"How many Fault Domains?"},"content":{"rendered":"<p>How many Fault Domains?<\/p>\n<p><a href='http:\/\/bit.ly\/1NsNOCp' target='_blank'><img src='https:\/\/d3utlhu53nfcwz.cloudfront.net\/171901\/cdnImage\/article\/e514d3f8-4dad-4c0f-a08d-da6945336a8d\/?size=Box320'><\/a><\/p>\n<h4><a href='http:\/\/bit.ly\/1NsNOCp' style='text-decoration: none;' target='_blank'>How many Fault Domains?<\/a><\/h4>\n<p>Some weeks ago I was involved in a discussion with a customer on their design around fault domains. There was an interesting scenario which was proposed and I was asked for my opinion or validation of the aproach. Before I talk about the solution let me re-cap what Fault Domains in VSAN are. The default storage policy in VSAN is to maintain 2 equal copies of a data object and 1 witness of metadata object, we call this Failures to Tolerate = 1. Traditionally, these objects would be automatically distributed across a separate host in the cluster allowing for the loss of 1 host, disk or other component in the cluster. This loss would only result in the VM\u2019s compliance being negatively reported until the rebuild operation has completed and&#8230;<a href='http:\/\/bit.ly\/1NsNOCp' target='_blank'>Read More<\/a><\/p>\n<hr \/>\n<p><a href='http:\/\/advocacy.vmware.com' target='_blank'>VMware Advocacy<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>How many Fault Domains? How many Fault Domains? Some weeks ago I was involved in a discussion with a customer on their design around fault domains. There was an interesting scenario which was proposed and I was asked for my opinion or validation of the aproach. Before I talk about the solution let me re-cap [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_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","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[1],"tags":[],"class_list":["post-8001","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p4m26N-253","jetpack-related-posts":[{"id":142,"url":"https:\/\/vspherestorage.com\/?p=142","url_meta":{"origin":8001,"position":0},"title":"Restarting management services may result in VSAN network partition if LACP is configured","author":"Mostafa Khalil","date":"11 years ago","format":false,"excerpt":"An issue was observed where a VSAN node gets partitioned after running at the host's console: #services.sh restart The host rejoins the cluster after the services restat. The root cause was attributed to restarting the\u00a0\"lacpd\" service which results in tearing down the LAG group then re-forming it. During which time,\u2026","rel":"","context":"In &quot;VSAN&quot;","block_context":{"text":"VSAN","link":"https:\/\/vspherestorage.com\/?cat=11"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":4949,"url":"https:\/\/vspherestorage.com\/?p=4949","url_meta":{"origin":8001,"position":1},"title":"VMware VSAN reusing SSD disks","author":"Mostafa Khalil","date":"11 years ago","format":false,"excerpt":"#VMware VSAN reusing SSD disksVMware VSAN reusing SSD disksEalier this week I\u2019ve been configuring a new VSAN cluster. The old configuration was using hardware that wasn\u2019t complying with the VMware vSAN HCL. We ordered new raid controllers and HDD\u2019s and reused the SSD disks, as those where compliant with the\u2026","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":137,"url":"https:\/\/vspherestorage.com\/?p=137","url_meta":{"origin":8001,"position":2},"title":"ESXi 5.5 EP07 posted. A must have before upgrading to VSAN6 in certain configurations","author":"Mostafa Khalil","date":"11 years ago","format":false,"excerpt":"A critical issue was reported with upgrading VSAN from ESXi 5.5 with Patch 4 or Express Patch 6 to vSphere\u00a06 GA. The problem was introduced in the above patches which attempted to fix an incorrect SSD capacity reporting when using RVC command vsan.disks_stats. EP07 backs out the above fix. Here\u2026","rel":"","context":"In &quot;VSAN&quot;","block_context":{"text":"VSAN","link":"https:\/\/vspherestorage.com\/?cat=11"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":14503,"url":"https:\/\/vspherestorage.com\/?p=14503","url_meta":{"origin":8001,"position":3},"title":"vSAN Objects Viewer","author":"Mostafa Khalil","date":"11 years ago","format":false,"excerpt":"vSAN Objects ViewerWhen troubleshooting vSAN issues, we need to complete understanding of the vSAN environment. Today I will introduce a good tool \"vSAN Objects Viewer\" that quickly converts vSAN information from text to graphics, including the followings: vSAN cluster topology vSAN nodes information vSAN disk [...]VMware Social Media Advocacy","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":14917,"url":"https:\/\/vspherestorage.com\/?p=14917","url_meta":{"origin":8001,"position":4},"title":"Flexible Topologies with vSAN Max","author":"Mostafa Khalil","date":"11 years ago","format":false,"excerpt":"Flexible Topologies with vSAN MaxvSAN Max offers many of the topology options available in a vSAN HCI cluster. Learn more about the benefits and design considerations of using vSAN Max with these alternative topologies here!VMware Social Media Advocacy","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":14925,"url":"https:\/\/vspherestorage.com\/?p=14925","url_meta":{"origin":8001,"position":5},"title":"Flexible Topologies with vSAN Max","author":"Mostafa Khalil","date":"11 years ago","format":false,"excerpt":"Flexible Topologies with vSAN MaxvSAN Max offers many of the topology options available in a vSAN HCI cluster. Learn more about the benefits and design considerations of using vSAN Max with these alternative topologies here!VMware Social Media Advocacy","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]}],"jetpack_likes_enabled":true,"_links":{"self":[{"href":"https:\/\/vspherestorage.com\/index.php?rest_route=\/wp\/v2\/posts\/8001","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vspherestorage.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vspherestorage.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vspherestorage.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/vspherestorage.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=8001"}],"version-history":[{"count":1,"href":"https:\/\/vspherestorage.com\/index.php?rest_route=\/wp\/v2\/posts\/8001\/revisions"}],"predecessor-version":[{"id":8002,"href":"https:\/\/vspherestorage.com\/index.php?rest_route=\/wp\/v2\/posts\/8001\/revisions\/8002"}],"wp:attachment":[{"href":"https:\/\/vspherestorage.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=8001"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vspherestorage.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=8001"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vspherestorage.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=8001"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}