V11 SP8
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DB2 pureScale Integration with GPFS File System Mirroring

You can integrate your DB2 pureScale environment with GPFS mirroring so that you can have a system that has high availability and enhanced performance.

The following configuration procedures are required.

Commvault Configuration

  1. Install and Configure the DB2 MultiNode Agent. For more information, see Getting Started with the DB2 MultiNode Agent.
  2. Configure the GPFS failover group for each DB2 pureScale client that is part of the configuration. For more information, see Configuring the GPFS Failure Group for DB2 MultiNode Client.

Proxy and Engine Configuration

  1. Provision all disks that are in the GPFS failure group on a single engine so that the IntelliSnap operation can interface with the engine.
  2. Make sure that you have a proxy cluster that has the same GPFS version. The proxy facilitates backup copy and restore operations.

    Note: You do not need to install the DB2 application on the proxy server.

GPFS Disks Configuration

  1. The GPFS disks must be visible on the DB2 pureScale nodes so that backups continue to work after a failover.
  2. The GPFS flags (-M, -m, -R, -r) must be equal to the number of  GPFS mirroring failure groups. For example, if the file system has 2 failure groups, then set the value for the flags (-M, -m, -R, -r) to 2.
  3. Set the GPFS -K attribute to "whenpossible".

Verifying the GPFS Configuration

You can use the following IBM commands to get detailed configuration information.

For details, go to the IBM Spectrum Scale command site, Command reference.

Command Information returned Column name
mmlsnsd The file system and disk names

 

File system
mmlsdisk The failure group when you use the extended list option

 

 

failure group

 

mmlsfs The file system default mount point value (this is the mount name that you specified for the Commvault configuration)
mmlsfs The file system attributes look for the -M, -m, -R,  -r and -K rows.