During the backup of any virtual machine, a snapshot of the virtual machine gets created on its datastore. If the datastore of any virtual machine does not have sufficient space for snapshots, the backup job completes with one or more errors. Before performing the backup, you can set a threshold of required free space. If a datastore does not have the required free space, the software does not back up the virtual machines residing in that datastore.
Procedure
Follow the steps given below to set the threshold for free space on a datastore:
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From the CommCell Console, navigate to Client Computers > virtualization_client > Virtual Server > VMware > backup_set.
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Right-click a subclient and click Properties.
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Click the Backup Options tab.
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Select Perform Datastore freespace check.
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In the Datastore freespace required box, enter the threshold value. By default, the threshold is set to 10%.
The minimum value you can specify is 1%.
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Click OK.
When you perform the backup of the subclient, a virtual machine is skipped from the backup if its datastore does not have the required free space. If a virtual machine has disks on multiple datastores, and if any one datastore does not have the required free space, the virtual machine is skipped from the backup.
This threshold applies to datastores for all virtual machines in the subclient.
Notes
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To perform a backup of skipped virtual machines, perform an incremental backup for the subclient, and select the Backup failed VMs only option on the Data tab of the Advanced Backup Options dialog box. For more information, see Backing Up Failed Virtual Machines.
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Before performing the incremental backup, ensure that sufficient free space is available on the datastores of all virtual machines.