You can back up a GlusterFS subclient on demand.
Procedure
From the navigation pane, go to Protect > File servers.
The File servers page appears.
Click the file server.
The file server properties page appears.
Under Subclients, in the Actions column for the subclient, click the action button
, and then click Back up.
The Select backup level dialog box appears.
For Backup level, select the backup type.
Click OK.