So setup is as follows;
-3 Node Hyper-V Cluster (Server 2012 R2)
-VMs stored over 2 CSVs
-Underlying FibreChannel Storage (no access to Hardware VSS, so using SoftwareVSS)
Veeam Backup and Replication v9
-Direct Attached Storage (SAS to JBOD)
-Storage repository provided by Storage Spaces (6PhysicalDisk, 1PhysicalDiskHotspare, 2wayMirror, 3Column)
-Everything is talking over 10GbE
Backup Jobs and Scheduling
-50VMs between multiple tenants
And error message I'm receiving;
"Production drive 'C:\ClusterStorage\Volume1' is getting low on free space (2.9 GB left), and may run out of free disk space completely due to open snapshots."
Only occuring on some a few days during the last week. First time it happened, I came into work with a large number of VMs(All on C:\ClusterStorage\Volume1), in a paused state due to insufficient storage. Not fun.
C:\ClusterStorage\Volume1 normally has at least 1.2TB of free space. But during backups only seems to have 20GB freespace. Finding it hard to believe that snapshots are using that much space.
There are 35 VMs that live on CSV1 and that are backed up, and they total roughly 3.3TB storage used(both dynamic disks and fixed disks). These 35 VMs are seperated into I think around 5 or 6 jobs
Am I underestimating the size that the Snapshot will be?
Or is there a way to tell the size and anticipate how much is required?
Is there a chance that snapshots are being left open permanently?
Sorry i know there a lot of information, but just any help in understanding the issue would be awesome!