Enabling Nodes

A node must be in the enabled state before MPI jobs can be run on it. To enable a node, make that node the current context and set its enabled attribute. Repeat for each node that you want to be available for running MPI jobs.

The following example illustrates this, using the same four-node cluster used in the previous examples.

node1# mpadmin[node0]:: node0[node0] N[node0]:: set enabled[node0] N[node0]:: node1[node0] N[node1]:: set enabled[node0] N[node1]:: node2[node0] N[node2]:: set enabled[node0] N[node2]:: node3[node0] N[node3]:: set enabled[node0] N[node3]::

Note the use of a shortcut to move directly from the Cluster context to the node0 context without first going to the general Node context. You can explicitly name a particular object as the target context in this way so long as the name of the object is unambiguous--that is, it is not the same as an mpadmin command.

mpadmin accepts multiple commands on the same line. The previous example could be expressed more succinctly as

node1# mpadmin[node0]:: node0 set enabled node1 set enabled node2 set enabled node3 set enabled[node0] N[node3]::

To disable a node, use the unset command in place of the set command.