Trying to setup Block Based Backup for CSV with HyperV machines stored on it in clustered environment.
But it always falls to full. The policy is correct I believe, since when I apply it to local C: volume, BBB works fine.
Seems this BBB does not support CSV used for Microsoft clustering, or requires some extra configuration.
Anybody has made this BBB to work with Cluster Shared Volume?
Windows 2012 R2
Networker 188.8.131.52 build448
To use these backup levels, it is a best practice to create the following schedule policies:
l Incremental Forever, which is used for BBB backups to DDR target.
l Incremental Forever Full on 1st of Month, which performs a full backup on the first
day of each month. This is a best practice for BBB to an AFTD target to limit the depth
of the differencing chain.
When you create a client, NMM enables incremental backups by default. NMM
automatically enables incremental backups for a virtual machine the first time it is
backed up. If you disable incremental backups later, NMM re-enables them. There is no
information attribute to control this behavior.
NMM promotes incremental backups to full under the following circumstances:
l NMM does not find a previous Full of the virtual machine.
l The required Recovery Snapshot cannot be validated.
l Incremental backup is not enabled for the virtual machine.
When one virtual machine backup is promoted to full, NMM does not promote other
virtual machines in the backup set. NMM uses multiple shadowcopy sessions by a single
backup operation to perform full and incremental backups.
Looks like you cannot use BBB for backup of CSV based resources.
As guide states:
"You can simultaneously see Cluster Shared Volumes (CSVs) across all nodes. The block based backups support only full backups of CSVs"
Not sure about purpose for BBB support for HyperV, when you cannot use it in clustered environment.
The quoted part speaks of BBB's supported level for CSV volumes (not sure, but I suspect some anchor used by API is done in such way that it is hard to get incremental block level due to lack of such block checkpoints).
I wrote that for a reason. Hyper-V VSS BBB over CSV is supported only with Disk based Targets. And above are the scenarios and configurations that you need to do in order for you to achieve Incremental forever backups.
You also need to make sure that IncrementalBackupEnabled" is enabled in Hyper-V.