mmlscallback command

Lists callbacks that are currently registered in the GPFS system.

Synopsis

mmlscallback [-Y] [CallbackIdentifier[,CallbackIdentifier...] | user | system | all]

Availability

Available on all IBM Spectrum Scale editions.

Description

Use the mmlscallback command to list some or all of the callbacks that are currently registered in the GPFS system.

Parameters

-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.
CallbackIdentifier: Indicates the callback for which information is displayed.
user: Indicates all user-defined callbacks. This is the default.
system: Indicates all system-defined callbacks.
all: Indicates all callbacks currently registered with the system.

Exit status

0: Successful completion.
nonzero: A failure has occurred.

Security

You must have root authority to run the mmlscallback command

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.

Examples

To list all of the callbacks that are currently in the GPFS system, issue this command:

mmlscallback

The system displays information similar to:

test1
        command       = /tmp/myScript
        event         = startup

test2
        command       = /tmp/myScript2
        event         = shutdown
        parms         = %upNodes

To list a specific callback (for example, test2) that is currently in the GPFS system, issue this command:

mmlscallback test2