GPFS: Administration and Programming Reference - IRA Home

1. Proper authorization is granted to all nodes in the GPFS cluster.
2. The nodes in the GPFS cluster can communicate without the use of a password, and without any
extraneous messages.
Examples
1. To display the quorum, the number of nodes up, and the total number of nodes for the GPFS cluster,
issue:
mmgetstate -a -L
The system displays output similar to:
Node number Node name Quorum Nodes up Total nodes GPFS state
------------------------------------------------------------------
1 k154gn01 3 5 8 active
2 k154gn02 3 5 8 active
3 k154gn09 3 5 8 active
4 k154gn10 3 5 8 active
5 k155gn01 3 5 8 active
6 k154gn02 3 5 8 down
7 k154gn09 3 5 8 down
8 k154gn10 3 5 8 down
The 3 under the Quorum column means that you must have three quorum nodes up to achieve
quorum.
2. This is an example of a cluster using node quorum with tiebreaker disks. Note the * in the Quorum
field, which indicates that tiebreaker disks are being used:
mmgetstate -a -L
The system displays output similar to:
Node number Node name Quorum Nodes up Total nodes GPFS state Remarks
--------------------------------------------------------------------
1 k5n91 5* 8 21 active
2 k5n92 5* 8 21 active quorum node
3 k5n94 5* 8 21 active
5 k5n96 5* 8 21 active
6 k5n97 5* 8 21 active quorum node
7 k5n98 5* 8 21 active
8 k5n99 5* 8 21 active quorum node
3. To displays summary information, issue this command:
mmgetstate -s
The system displays output similar to:
Node number Node name GPFS state
------------------------------------------
1 k154n05 active
Summary information
---------------------
Number of nodes defined in the cluster: 8
Number of local nodes active in the cluster: 8
Number of remote nodes joined in this cluster: 0
Number of quorum nodes defined in the cluster: 2
Number of quorum nodes active in the cluster: 2
Quorum = 1*, Quorum achieved
mmgetstate Command
Chapter 8. GPFS commands 189