Virtual SAN Streatched Cluster with more than on cluster

[vSohill]

Hi,

Since it is 1+1+1 realation (siteA Witness SiteB) in Virtual SAN Streatched Cluster, in case I have more than one Clsuter in Site A do I need another Witness for that cluster ?

Virtaul SAN license is per CPU Is it matter how many cluster I need to replicate ?

[Jasemccarty · Accepted solution]

vSohill‌,

I'm not certain what you are trying to do, but I'll try to give some guidance.

• Virtual SAN is licensed in one of 3 fashions.
  • Per CPU for all workloads other than Virtual Desktops
  • Per Desktop for all Virtual Desktop (VDI) environments
  • Per 25 VM pack for Remote Office Branch Office deployments (ROBO)
• Stretched Cluster configurations
  • Comprised of between 2 and 15 hosts per site and a single witness (per cluster)
    • 2+2+1… 15+15+1
  • Virtual SAN Advanced licensing with Virtual SAN 6.1
  • Virtual SAN Enterprise licensing with Virtual SAN 6.2
• 2 Node configurations
  • Comprised of 1 host per site and a single witness (per cluster) or 1+1+1
  • Can be used with any edition of Virtual SAN 6.1 or 6.2
  • Does not require Advanced or Enterprise licensing.

Data is not written and then replicated, as writes occur simultaneously across both sites. Data however is only read from the site that the virtual machine resides on.

I highly recommend the Stretched Cluster and 2 Node Guide:

Virtual SAN 6.1: https://www.vmware.com/files/pdf/products/vsan/VMware-Virtual-SAN-6.1-Stretched-Cluster-Guide.pdf

Virtual SAN 6.2: https://www.vmware.com/files/pdf/products/vsan/VMware-Virtual-SAN-6.2-Stretched-Cluster-Guide.pdf‌

I hope that helps.

[vSohill]

Thanks again  JasemccartyJasemccartyJasemccarty

You answered my question.

1- What I could not take a desion on is the network configuration.

3 options  in the guied. 1th and 2th is for POC and third which is recommended  (2 Node configuration for Remote Office/Branch Office Deployment) install 3 sites in one geographical place, which can cause to lose 3 sites if a catastrophic even happed. Is this recommeded for ROBO only ?

Is it supported if I hosted the witnees in the Cloud?

2 - Is there any white paper for VMs migratation from a SAN Shared Storage to Virtual SAN ?

[Jasemccarty]

vSohill‌,

1) You can absolutely run the Witness in the cloud or another datacenter. While we'd like to include this in the guide, we haven't yet validated vCloud Air with the Virtual SAN Witness as of yet. We've got it on our list to validate, but haven't accomplished it yet.

2) If your vSphere license allows for Storage vMotion, you can migrate your virtual machines from your SAN Shared Storage to Virtual SAN while they are running. If your vSphere license does not allow Storage vMotion, you'll have to power them off, and then perform the migration.

I hope that helps!

Jase

[vSohill]

Thank you Jase,