GPFS

About GPFS

The General Parallel File System (GPFS)
it is a high performance shared disk clustered file system

GPFS proides concurrent high-speed file access to applications executing nodes of clusters.
it can be used with AIX 5L cluster, Linux clusters, on Micrsoft Windows Server, or a heterogeneous cluster of AIX, Liux and Windows nodes. In addition to providing file system storage capacbilities, GPFS provides tools for management and administration of the GPFS cluster and allows for shared access to fie systems from remote GPFS clusters.

Pre-Requisite for GPFS

AIX 5.3 SOE Patchset 13 or later, Aix 6.1 SOE Patchset 6 or Later
GPFS version 3.3 with ML4

Take a alt disk backup before seting up gpfs

Make sure the cluster disk is visible on both nodes.

SSh Configuration between GPFS nodes.

for cluster managment it is requirment of gpfs that ssh keys are configured for the root acccount for connections between cluster nodes. This only applies for coonnections from manager nodes to manager nodes and from  manager nodes to client nodes. Notes that manager node also needs the ability to connect to itself via ssh

# lslpp -l |grep -i gpfs
# mmcrcluster -N /tmp/gpfs.allnodes -p hostname -s hostname -r /usr/local/bin/ssh-R/usr/local/bin/scp -C xxxx
# mmgetstat -a [current status]
# mmlscluster [to list file for gpfs]
# vi /tmp/gpfs.disk [adding the gpfs file need to configure in hdisk]
hdisk6:hostname-backup1,hostname-backup2::dataAndMetadata:1;arp19gpfs1
# mmcrnsd -F /tmp/gpfs.disk -v no
# mmlsconfig
# mmcrfs gpfs-name-F /tmp/gpfs.disk -T /gpfs-name -B 64K -A yes
# mmlsfs gpfs-name
# mmshutdown -a [shutdown gpfs on all nodes]
# mmchconfig tiebreakerdisks="gpfs-name" [to verify the outputs @lspv cmds]
# mmstartup -a
# mmount -a  /gpfs-name
# mmshutdown [to single gpfs filesystem for shutdown]
# mmshutdown -N node,[node,node] [shutdown the filesystem on the listed nodes]