I had one more demo to finish and share and that is the vSAN 6.6 stretched cluster demo. I already did a stretched clustering demo when we initially released it, but with the enhanced functionality around local protection I figured I would re-record it. In this demo (~12 minutes) I will show you how to configure vSAN 6.6 with dedupe / compression enabled in a Stretched Cluster configuration. I will also create 3 VM Storage Policies, assign those to VMs and show you that vSAN has place the data across locations. I hope you find it useful.
Thanks for the great video.
I was wondering how many nodes are required to comply with the “Not Stretched – Preferred Site” policy.
I’m currently in a VSAN 6.6 POC with a 2+2+1 full flash stretched config, and I’m unable to “pin” one VM to one site using RAID 1 local protection. Is it even possible?
Thank you for all the good knowledge!!!
yes it is possible, but you need 3 nodes per site. The reason for this is because you have 2 copies of the data and a witness component which needs to reside locally. I had a few other folks asking a similar question so I threw this together quickly:
http://www.yellow-bricks.com/2017/05/30/sizing-vsan-stretched-cluster/
Great. In my book, your word is as good as official documentation.
Maybe a good implemenation request could be a “local witness vm”, to be hosted outside the VSAN cluster but in the same site.
Thank you so much Duncan.
In a stretched cluster deployment there is the recommendation to use 2 default isolation address, one specific to site A and one specific to site B.
Is it ok to use a single isolation address that is reachable from both site even if the link between them is broken?
sure, if you have an IP which is reachable at both sites even during a site partition, then that is okay as well.
Thank you Duncan!
Thanks for the video. I do have one question, in a vSAN stretched cluster, can you use vCenter HA? I know that a vSphere Metro Storage Cluster only allows for one vCenter server. Thanks in advance for sharing.
I think guidance around this is being worked on by the vCenter Tech Marketing guys… Both for Metro Storage and vSAN Stretched.