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Repeated snapshot consolidation requests on VM by Snapshot Hunter

KB ID: 2091
Product: Veeam Backup & Replication | 8.0 | 9.0 | 9.5 | 10 | 11 | 12 | 12.1 | 12.2
Published: 2016-01-25
Last Modified: 2021-12-15
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Challenge

This article specifically applies to a situation where the VM was created using a third-party VDI, fast-provisioning application, or PowerCLI with the –LinkedClone parameter.

Shortly after a backup or replication job runs, multiple Consolidate Snapshot operations are performed against the VM.

Cause

Snapshot Hunter misidentifies the user snapshot of a VM created from a linked clone template as an orphaned snapshot and attempts to consolidate it.
 
Beginning in 8.0.0.917 (v8 Patch 1), Snapshot Hunter will not attempt to process orphaned snapshots on VMs created by vCloud Director. The Snapshot Hunter checks for the presence of the cloud.uuid parameter in the VM configuration (.vmx file).
 
Example: 
cloud.uuid = "001.00000000-0000-0000-0000-000000000000"

Solution

Add the cloud.uuid parameter to each linked clone to cause Snapshot Hunter to not attempt to process that VM.

The cloud.uuid parameter will need to be added to each affected VM. If vCloud Director is not being used, the content of the cloud.uuid parameter does not matter. Snapshot Hunter only checks the VMX to see whether or not the parameter exists. You can add the parameter to a VM using a vSphere client, a PowerCLI script, or by editing the VMX file using the editor available in Veeam B&R’s Files view.

More Information

It is no longer advisable to disable Snapshot Hunter, as many improvements have been made to improve its stability.

If you are facing issues with Snapshot Hunter, please open a Veeam Support case.

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