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PowerStore Metro Volume Architecture
Hello,
I have to site with vSphere clusters and two vcenters in linked mode configuration, we want to use two Powerstore clusters to replicate between the sites using Metro volumes:
- Is vSphere stretched cluster (vSphere Metro Storage Cluster configuration) a requirement to use Powerstore metro volume between two sites?
- Does Metro volume support only vSphere hosts?
- Can i configure a metro volume with only one vCenter and one vSphere cluster in site A to replicate only the storge to site b without using the vMSC configuration?
Thank you.
SteveK821
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November 8th, 2022 05:00
1) For Metro Volumes, you need one vCenter and a stretched cluster.
2)Only ESXi Hosts are currently supported with native Metro Volumes in Powerstore.
All hosts should see both Powerstores (Uniform Connectivity), but you can also configure a host to only use one side (Non-Uniform Connectivity)
https://www.dell.com/support/manuals/en-us/powerstore-3000t/pwrstr-protect-data/configure-host-connectivity?guid=guid-97f7bba6-37c5-4fab-bae4-4296a3a5fc17&lang=en-us
For question 3, yes you could use metro to replicate the storage to site B, without any hosts connected to Powerstore B (I think).
ca_fahem
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November 8th, 2022 06:00
Thank you for your answers
For the question 3, if I replicate only the storage to site B , can i map it to hosts in site B in other clusters than site A (so another vCenters and ESXis) (manually without HA & DRS). does the PowerStore permit that ?.
SteveK821
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November 17th, 2022 06:00
I don't know if that would work. I'm sure Powerstore would permit that, but I think that would lead to data corruption. The Datastore is read/write on both sides and all writes are replicated. You'd have 2 different clusters writing to the same VMFS, that don't know about each other. Bad things will probably happen there. I don't know if ESX has any sort of failsafe mechanism to prevent something like that.