bpctl may be used to command a node to enter a new state, or to change permissions to use a node.
State may be:
where mode option is one of:
Each slave node in the cluster is owned by a user and a group, and has an access mode. This is exactly like POSIX file permissions except that currently, only execute has meaning to the system. Thus, bpctl with -m, -u, or -g is like chmod, chown, and chgrp respectivly. These permissions come into play whenever a process attempts to migrate to another node in the cluster. This mechanism is primarily useful to enforce fair sharing or support reservations in a large cluster administrativly.