Nimble Snapshot Replication issues after upgrading to Veeam 9.5 Update 4

[bgutan]

Since Upgrading to Veeam 9.5 update 4, Nimble snapshots taken on a primary array which are then replicated to a secondary array replicate the entire volume instead of just the changes. This is causing my backup window to greatly increase. Per Veeam support, Case # 03404627, nothing has changed in the code with the Nimble snapshot replication between update 3A and update 4. I reverted back to my Veeam 9.5 Update 3A server and I have no issues with snapshots. Anyone else using having issues with using Veeam to replicate snapshots to secondary array since upgrading to Veeam 9.5 update 4?

[HannesK]

Hello Bryan,
and welcome to the forums.

I talked to support & QA and we will continue investigating your case. That does not look correct for me.

Thanks for bringing up that issue,
Hannes

[foggy]

Hi Bryan, we have other cases with similar issue and Nimble support is also involved. Working with them to get the details. Thanks!

[foggy]

FYI, we've identified the reason of the issue, it will be addressed in the next update. Thanks!

[bgutan]

Any ETA for the next update?

[foggy]

It is not decided yet. There's however a registry value that should help to eliminate the issue: NimbleKeepTransferSnapshot (should be set to 1, standard Veeam key on the backup server: HKLM\SOFTWARE\Veeam\Veeam Backup & Replication).

[bgutan]

I re-applied update 4, added the registry key, and it resolved the issue.

Thanks,

Bryan