IBM eserver Cluster 1350, Installation And Service Manual

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Defining nodes using GPFS
Use the mmaddnode command to add nodes to an existing GPFS node set. On
each new node, a mount point directory and character mode device is created for
each GPFS file system.
Syntax: mmaddnode [-C NodesetId] {-n NodeFile | NodeName[:manager |
client][,NodeName[:manager | client]...]}
Parameters:
__
C NodesetId
The identifier of the GPFS node set you want to add nodes to. If this option
is not specified or a period (.) is used for the NodesetId , the nodes are added
to the node set from which the mmaddnode command was issued. To
determine the node set, at the command prompt, type
mmlsnode -C
__
-n
NodeFile
The file containing the list of node descriptors, one per line, to be added to
the node set. Node descriptors are of the same format as in the
NodeName[:manager | client]
parameter, and follow the same rules.
__
NodeName[:manager | client][,NodeName[:manager | client]...]
A comma-separated list of nodes to be added to the node set. Nodes are
specified by a node name and can be optionally followed by a use
designation. A designation of manager specifies that the node must be
included in the pool of nodes from which the file system manager node is
chosen. For further information on the role of a node as the file-system
manager, see the General Parallel File System for Linux(R): Concepts,
Planning, and Installation Guide and search for file system manager .
The host name or IP address must refer to the communications adapter.
Alias interfaces are not allowed. Use the original address or a name that is
resolved by the host command to that original address. You can specify a
node using any of these forms:
Short hostname
k145n01
Long hostname k145n01.kgn.ibm.com
IP address 9.119.19.102
Security
You must have root authority to run the mmaddnode command. You can issue the
mmaddnode command from any node in the GPFS cluster.
When using rcp and rsh for remote communication, a properly configured rhosts file
must exist in the root user’s home directory, normally /root, on each node in the
GPFS cluster. If you have designated the use of a different remote communication
program in the mmcrcluster or the mmchcluster command, make sure that proper
authorization is granted to all nodes in the GPFS cluster and the nodes in the
GPFS cluster can communicate without the use of a password.
Examples
1. To add nodes k145n04 and k145n05, designating k145n04 to be available as a
manager node only, and by default, add the nodes to the GPFS node set, type
mmaddnode k145n04:manager,k145n05.
2. To confirm the addition, type
mmlsnode -C
.
3. To add nodes k145n06 and k145n07 to the GPFS node set set1, type
mmaddnode -C set1 k145n06,k145n07
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IBM
Eserver
Cluster 1350 Installation and Service Guide