What is GPFS cluster?

The IBM® General Parallel File System (GPFS™) is a cluster file system. This means that it provides concurrent access to a single file system or set of file systems from multiple nodes. You can create a GPFS cluster of AIX® nodes, Linux nodes, Windows server nodes, or a mix of all three.

What is quorum manager in GPFS?

GPFS uses a cluster mechanism called quorum to maintain data consistency in the event of a node failure. This keeps any nodes that are cut off from the cluster (for example, by a network failure) from writing data to the file system.

What is Mmfs file system in AIX?

The “mmfs” nomenclature is the proper VFS type for a GPFS file system when viewed on Linux/AIX systems. It is historical based on GPFS’s past when the core technology was developed for streaming multimedia application (hence “mm”). There are no other file system types that can be created by GPFS. Like. Contact.

How do I get Gpfs snap?

Use the -N option to obtain gpfs. snap data from multiple nodes in the cluster. When the -N option is used, the gpfs. snap command takes non-master snapshots of all the nodes that are specified with this option and a master snapshot of the node on which it was issued.

What does Gpfs stand for?

GPFS (General Parallel File System, brand name IBM Spectrum Scale) is a high-performance clustered file system software developed by IBM. It can be deployed in shared-disk or shared-nothing distributed parallel modes, or a combination of these.

How do I know if GPFS is running?

Steps to follow if the GPFS daemon does not come up

1. See GPFS modules cannot be loaded on Linux if your node is running Linux®, to verify that you have built the portability layer.
2. Verify that the GPFS daemon is active by issuing: ps -e | grep mmfsd The output of this command should list mmfsd as operational.

What does GPFS stand for?

How do I find my GPFS cluster version?

The file system version levels that are compatible with the daemon version running will be displayed. Look for the “Build” line. rpm -qa | grep gpfs worked.

How to remove all configuration from GPFS cluster?

The removal should be done for each nodeset in the GPFS cluster using the mmdelnode command as follows: And finally, remove the GPFS cluster definition with mmdelcluster -a. Example 8-12 shows the commands we used to delete our small GPFS configuration. The commands were run exclusively on the GPFS primary node.

What are the commands that GPFS will execute?

Registers a user-defined command that GPFS will execute when certain events occur. Only available with the IBM® System x® GPFS Storage Server. Adds one or more GPFS components. Adds disks to a GPFS file system. Adds nodes to a GPFS cluster. Adds a pdisk to a GPFS Native RAID recovery group.

How to remove all nodes from Nodeset in GPFs?

Remove all nodes from nodeset with mmdelnode -a. The removal should be done for each nodeset in the GPFS cluster using the mmdelnode command as follows: And finally, remove the GPFS cluster definition with mmdelcluster -a. Example 8-12 shows the commands we used to delete our small GPFS configuration.

How can I tell if my GPFS cluster has a pdisk?

Lists the nodes that have a given GPFS file system mounted. Displays node classes defined in the system. Displays Network Shared Disk (NSD) information for the GPFS cluster. Lists information for one or more GPFS Native RAID pdisks.