shmem_minfree

You should not change this node attribute. It is described here so that you will be able to interpret its value when node attributes are displayed via the dump or show commands.

The shmem_minfree attribute reserves some portion of the /tmp file system for non-MPI use.

For example, if /tmp is 1 Gbyte and shmem_minfree is set to 0.2, any time free space on /tmp drops below 200 Mbytes (1 Gbyte * 0.2), programs using the MPI shared memory protocol will not be allowed to run.

[node0]
N(node1):: set shmem_minfree=0.2

shmem_minfree must be set to a value between 0.0 and 1.0. When shmem_minfree is unset, it defaults to 0.1.

This attribute can be set on both nodes and partitions. If both are set to different values, the node attribute overrides the partition attribute.