GPFS: Administration and Programming Reference - IRA Home

mmdelsnapshot Command
Name
mmdelsnapshot – Deletes a GPFS snapshot.
Synopsis
mmdelsnapshot Device Directory
Description
Use the mmdelsnapshot command to delete a GPFS snapshot.
Once the mmdelsnapshot command has been issued, the snapshot is marked for deletion and cannot be
recovered.
If the node from which the mmdelsnapshot command is issued fails, you must reissue the command from
another node in the cluster to complete the deletion. Prior to reissuing a subsequent mmdelsnapshot
command, the file system may be recovered, mounted, and updates may continue to be made and the
mmcrsnapshot command may be issued. However, the mmrestorefs and mmdelsnapshot commands
may not be issued on other snapshots until the present snapshot is successfully deleted.
If the mmdelsnapshot command is issued while a conflicting command is running, the mmdelsnapshot
command waits for that command to complete. Conflicting operations include:
1. Other snapshot commands on the same snapshot
2. Adding, deleting, replacing disks in the file system
3. Rebalancing, repairing, reducing disk fragmentation in a file system
Any files open in the snapshot will be forcibly closed. The user will receive an errno of ESTALE on the
next file access.
Parameters
Device
The device name of the file system for which the snapshot is to be deleted. File system names
need not be fully-qualified. fs0 is just as acceptable as /dev/fs0.
This must be the first parameter.
Directory
The name of the snapshot to be deleted
Options
NONE
Exit status
0 Successful completion.
nonzero A failure has occurred.
Security
You must have root authority to run the mmdelsnapshot command.
You may issue the mmdelsnapshot command from any node in the GPFS cluster.
Chapter 8. GPFS commands 163