https://computing.llnl.gov/linux/slurm/power_save.html or 
    "man slurm.conf" (SuspendProgram and related parameters) for more 
    information.
This is the final installment of the work: update some documenation, 
    increase default ResumeRate, and reduce frequency of retrying 
    batch launch state check.

that it doesn't get set DOWN right away for not responding since
the last time it was powered up.

Don't allocate nodes to a job step until it is responding (as before) AND
  the node is no longer in power save mode.

    "man slurm.conf" (SuspendProgram and related parameters) for more 
    information.
NOTE: the step create logic needs to be modify to return EAGAIN or the 
    like until the node's state NOT_RESPONDING flag gets cleared.

    longer needed.

See NEWS for identification of all changes

    ping the node immediately to clear the NOT_RESPONDING flag.

    expression rather than one line per node. Frequency of log messages is 
    dependent upon SlurmctldDebug value from 300 seconds at SlurmctldDebug<=3
    to 1 second at SlurmctldDebug>=5.

  respect to SlurmdTimeout parameter.

Also call ping_nodes even when SlurmdTimeout=0 so that
non-responsive nodes can be returned to service.

    the node to be returned to use when it starts responding rather than 
    remaining in a non-usable state.