I've not managed to convince the management to pay for the support, but this may well sway it!
We're running starwind VSAN v8.8730 hosting a 2Tb drive for 25 VMs. Each has 80Gb thin provisioned drives and the VM platform is Ovirt 4.1.1
we've only marginally over provisioned the drives assuming that we'd not use all space on the Centos servers we run on it.
But now, after a year they all growing to use the maximum disk space and we are getting very close to the limits.
With our without the Linux "FStrim" service running the VMs wont release the space back to the block storage
Most of the machines only use 4Gb of disk space.
Currently our mitigation is to shut down the VMs and clonezilla them onto a fresh drive and discard the old. This is not sustainable though.
Does the version we have support the pass through of the discard function, which. i believe, is what's required here?
From some of Ovirt's support pages https://ovirt.org/develop/release-manag ... orage.html it mentions;
Do you have any advice for us on this matterIf all the restrictions are met and Pass Discard is enabled, when a discard command (UNMAP SCSI command) is sent from the guest, qemu will not ignore it and will pass it on to the underlying storage. Then, the storage will set the unused blocks as free so that others can use them, and the reported consumed space of the underlying thinly provisioned lun will reduce.