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jkoebrunner
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VSAN default storage policy (FTT=1): large disks get stripped?!

What I have found out while ivestigating a VSAN resync problems, is that two VMs have vdisks which are striped into more objects.

This is strange because the default storage policy only defines FTT=1.

It's strange that there are RAID1, RAID0, RAID1 objects with the default policy as seen in the screenshot attached.

I assume that is somehow related to the size of the vdisks. I have also checked that wihth another VSAN installation, there its also the same.

Can somebody tell me at which size VSAN decides to stripe vdisk objects?

BR Johannes

Johannes Köbrunner IT Solutions Architect Virtualization, Network and Storage Systems Frequentis AG VTSP, VCP, VCAP-DCD
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CHogan
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CHogan
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This should help to explain it - VSAN Part 23 – Why is my Storage Object Striped? | CormacHogan.com

http://cormachogan.com
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jkoebrunner
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Thanks for your fast and plausible answer Smiley Happy

Anyhow, it's a little bit strange that there is a RAID1 in a RAID0 as seen on the screenshot?

Can you explain this behaviour?

Johannes Köbrunner IT Solutions Architect Virtualization, Network and Storage Systems Frequentis AG VTSP, VCP, VCAP-DCD
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CHogan
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It might be because it is reconfiguring (not sure).

Check it again when everything is synced and active.

http://cormachogan.com
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jkoebrunner
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This state exists now for 24 hours and vdisks are partly inaccessible.

vsan.resync_dashboard does not show any resync in progress...

vsan.check_state reports missing objects...

We have a Webex session with Vmware support soon...

Johannes Köbrunner IT Solutions Architect Virtualization, Network and Storage Systems Frequentis AG VTSP, VCP, VCAP-DCD
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