# Snapshots for Virtualization Workloads

For some Virtualization workloads, the Commvault software backs up only the most recent full snapshot and the most recent incremental snapshot of a VM group.

The Virtualization workloads are as follows:

- Amazon EC2

- Azure

- Google Cloud

- Hyper-V

- Nutanix

- VMware

For all other Virtualization workloads, the Commvault software backs up snapshots as specified by the retention settings for the backup copy in the backup plan that is assigned to the VM group. For spool retention, the system retains the last snapshot job for which a backup copy operation was successfully completed, maintaining continuity of Change Block Tracking (CBT) operations. This behaviour does not apply to Hyper-V and VMware workloads.

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