IBM General Parallel File System for AIX: Administration and Programming Reference

Starting and stopping GPFS

Before starting GPFS:

1. Insure you have:
   1. Verified the installation of all prerequisite software for your environment.
   2. Verified there is no conflicting software installed.
   3. Properly configured and tuned your system for use by GPFS. This should be done prior to configuring GPFS.
   4. Completed all of the GPFS configuration considerations including running the mmconfig command.

   For details see the IBM General Parallel File System for AIX: Concepts, Planning, and Installation Guide.

2. If you are using the Data Management API (DMAPI) for GPFS to manage the data in your file system, you may customize the shell script gpfsready to synchronize the initialization of the GPFS daemon and the data management application. The script is invoked by the GPFS daemon as file systems are starting to be mounted, and can be used to verify the data management application is ready to handle mount events from the file system. For further information regarding the script, see the IBM General Parallel File System for AIX: Data Management API Guide and search for initializing the Data Management application.

Start the daemons on all of the nodes in the nodeset by issuing the mmstartup command:

mmstartup -C set1

Check the messages recorded in /var/adm/ras/mmfs.log.latest on one node for verification:

mmfsd initializing ...
GPFS: 6027-300 mmfsd ready
 

This indicates successful start-up of a quorum of nodes.

If GPFS does not start, see the IBM General Parallel File System for AIX: Problem Determination Guide and search for the GPFS daemon will not come up.

See the mmstartup Command for complete usage information.

If it becomes necessary to stop GPFS, you can do so from the command line by issuing the mmshutdown command:

mmshutdown -C set1

The system displays information similar to:

Wed Aug 16 17:27:01 EDT 2000: 6027-1341 mmshutdown: Starting force unmount of GPFS file systems
k145n08:  forced unmount of /fs2
k145n08:  forced unmount of /fs1
k145n05:  forced unmount of /fs2
k145n05:  forced unmount of /fs1
Wed Aug 16 17:27:06 EDT 2000: 6027-1344 mmshutdown: Shutting down GPFS daemons
k145n08:  Shutting down!
k145n08:  0513-044 The mmfs Subsystem was requested to stop.
k145n05:  Shutting down!
k145n05:  0513-044 The mmfs Subsystem was requested to stop.
Wed Aug 16 17:27:10 EDT 2000: 6027-1345 mmshutdown: Finished
 

See the mmshutdown Command for complete usage information.