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Adding nodes to a GPFS cluster using use command mmaddnode, mmlsnode and mmlscluster.

Posted by on September 15, 2010

You can add nodes to an existing GPFS cluster by issuing the mmaddnode command. The new nodes are available immediately after the successful completion of this command.
You must follow these rules when adding nodes to a GPFS cluster:

* You may issue the command only from a node that already belongs to the GPFS cluster.
* A node may belong to only one GPFS cluster at a time.
* The nodes must be available for the command to be successful. If any of the nodes listed are not available when the command is issued, a message listing those nodes is displayed. You must correct the problem on each node and reissue the command to add those nodes.
You can use command mmaddnode, mmlsnode and mmlscluster.

To add node k164n06 to the GPFS cluster, enter:

mmaddnode -N k164n06

The system displays information similar to:

Mon Aug 9 21:53:30 EDT 2004: 6027-1664 mmaddnode: Processing node k164n06.kgn.ibm.com
mmaddnode: Command successfully completed
mmaddnode: 6027-1371 Propagating the changes to all affected nodes.
This is an asynchronous process.

To confirm the addition of the nodes, enter:

mmlscluster

The system displays information similar to:

GPFS cluster information
========================
GPFS cluster name: cluster1.kgn.ibm.com
GPFS cluster id: 680681562214606028
GPFS UID domain: cluster1.kgn.ibm.com
Remote shell command: /usr/bin/rsh
Remote file copy command: /usr/bin/rcp

GPFS cluster configuration servers:
———————————–
Primary server: k164n04.kgn.ibm.com
Secondary server: k164n05.kgn.ibm.com

Node Daemon node name IP address Admin node name Designation
————————————————————————————–
1 k164n04.kgn.ibm.com 198.117.68.68 k164n04.kgn.ibm.com quorum
2 k164n05.kgn.ibm.com 198.117.68.69 k164n05.kgn.ibm.com quorum
3 k164n06.kgn.ibm.com 198.117.68.70 k164n06.kgn.ibm.com

See the mmaddnode Command and the mmlscluster Command for complete usage information.

Comments

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2 Responses to Adding nodes to a GPFS cluster using use command mmaddnode, mmlsnode and mmlscluster.

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