Known Issues

The current implementation has the following limitations:

• You cannot back up template VMs.

• You cannot back up independent disks.

Resource Limit per CNA Host

Each CNA host can support up to eight (8) streams. If you perform a backup for multiple virtual machines using more than eight streams, the job might go to Pending state, and virtual machines that are skipped because of this resource limit are backed up in a subsequent attempt.

If backups and restores are running simultaneously and the resource limit is reached, you might not be able to complete those actions successfully.

To avoid backup failures, limit the number of streams so that less than eight streams are used in backups. You can adjust the number of streams for each subclient by modifying the Number of Data Readers value on the Advanced Options tab of the subclient properties.

Setting the Snapshot Retry Interval

In some cases, you might need to increase the retry interval between failed snapshot attempts that occur during backups. This can occur when FusionCompute does not respond immediately to snapshot requests.

On the VSA proxy, create the nCreateSnapshotRetryIntervalSecs additional setting as shown in the following table. Retest the backup with values in increments of 50 seconds to see what value works best in your environment.

For instructions on adding additional settings from the CommCell Console, see Adding or Modifying an Additional Setting.