A backup operation for Red Hat Virtualization VMs includes the following stages:
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Discover virtual machines based on subclient content properties.
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For each virtual machine that is discovered, create a client computer entry in the CommCell Browser.
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Identify the virtual machines to be included in the backup and the VSA proxies that can be used to perform the backup.
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Assign backup streams to proxies.
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Create virtual machine snapshots.
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For each source VM:
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Mount disks on the proxy (hot-plug).
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Read extents from snapshots.
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Compute CRC values to identify changed data.
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Write data to backup media.
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After the backup completes, unmount the disks from the proxy (hot-unplug) and delete the virtual machine snapshot.
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Clean up the Job Results folder on the proxy and complete the backup job.