mmlsmgr command
Displays which node is the file system manager for the specified file systems or which node is the cluster manager.
Synopsis
mmlsmgr [Device [Device...]] [-Y]
or
mmlsmgr -C RemoteClusterName
or
mmlsmgr -c
Availability
Available on all IBM Spectrum Scale™ editions.
Description
Use the mmlsmgr command to display which node is the file system manager or cluster manager for the file system.
If you do not provide a Device operand, file system managers for all file systems within the current cluster for which a file system manager has been appointed are displayed.
Parameters
- Device
- The device names of the file systems for which the file system
manager information is displayed.
If more than one file system is listed, the names must be delimited by a space. File system names need not be fully-qualified. fs0 is just as acceptable as /dev/fs0.
If no file system is specified, information about all file systems is displayed.
- -C RemoteClusterName
- Displays the name of the nodes that are file system managers in cluster RemoteClusterName.
- -c
- Displays the current cluster manager node.
- -Y
- Displays the command output in a parseable format with a colon (:) as a field
delimiter. Each column is described by a header.Note: Fields that have a colon (:) are encoded to prevent confusion. For the set of characters that might be encoded, see the command documentation of mmclidecode. Use the mmclidecode command to decode the field.
Exit status
- 0
- Successful completion.
- nonzero
- A failure has occurred.
Security
If you are a root user, the node on which the command is issued must be able to execute remote shell commands on any other node in the cluster without the use of a password and without producing any extraneous messages. For more information, see Requirements for administering a GPFS file system.
As root, a user can also issue the mmlsmgr on remote file systems.
If you are a non-root user, you may specify only file systems that belong to the same cluster as the node on which the mmlsmgr command was issued.
Examples
- To display the file system manager node information for all the
file systems, issue this command:
The system displays information similar to:mmlsmgr
file system manager node ---------------- ------------------ fs3 9.114.94.65 (c154n01) fs2 9.114.94.73 (c154n09) fs1 9.114.94.81 (c155n01) Cluster manager node: 9.114.94.65 (c154n01)
The output shows the device name of the file system and the file system manager's node number and name, in parenthesis, as they are recorded in the GPFS cluster data.
- To display the file system manager information for file systems gpfs2 and gpfs3,
issue this command:
The system displays information similar to:mmlsmgr gpfs2 gpfs3
file system manager node [from 199.116.68.69 (k156gn02)] ---------------- ------------------ gpfs2 199.116.68.70 (k154gn02) gpfs3 199.116.68.72 (kolt2g_r1b42)