VMware Cloud Community
SteveBInReno
Contributor
Contributor

v7.0.3 VSAN: VSAN object reformat gobbling up MOST of VSAN storage

Currently  have v7.0.3 VSAN; warning in Skyline Health that VSAN objects need to be reformatted (2 objects).  This is the second attempt to do this.  One first run available VSAN storage went to 10T used (out of 19.7T) to almost entirely consumed.  Was able to cancel the process before complete exhaustion, but had to manually remove some stuff from VSAN datastore.

Just started it again; we had 10T free again, started the process, and it immediately consumed nearly 6T.  Cancelled the process but it hasn't freed up the space it consumed.

Where is some comprehensive procedures I can use to get back the VSAN storage that this process has just wasted?

Thanks.

SteveInReno

Reply
0 Kudos
2 Replies
SteveBInReno
Contributor
Contributor

Follow up: the older VM in question has several disk volumes provisioned for 1T-2.5T, not thin provisioned, with a "max volume size" set for up to 3 times the configured size.  It appears that the re-sync/reformat object operation allocated the ENTIRE max size, so yeah, one VM is consuming 12T in disk space with volumes no larger than 4T configured.  No idea where to go from here; changing disk provsioning model to thin will likely destroy any space left on the VSAN, so not comfortable at all trying that.  Rebalance on one host still on-going, rebalance on second host failed because of "no resources".

Reply
0 Kudos
SteveBInReno
Contributor
Contributor

Well, it appears that the VSAN cluster recovered overnight. We're back to 9.5T of 19.7T used!

Thanks for looking!

SteveInReno

Reply
0 Kudos