HP XC System Software Administration Guide Version 3.0

Example 12-3. Taking a Node Out of Service Taking a Node Out of Service
# scontrol update nodename=n17 state=down
The scontrol command returns nodes to an IDLE state so that they can be reused. Example 12-4. places
n17 in the IDLE state to return it to service:
Example 12-4. Returning a Node to Service Returning a Node to Service
# scontrol update NodeName=nodelist State=idle
When returning a node to service, HP recommends that you set the state to DRAIN, even if no jobs are
currently running. This has two advantages:
• It is easier to recognize nodes that are down unexpectedly when skimming the output of the sinfo
command.
• If the node is rebooted accidentally or a as part of the maintenance procedure, the DRAIN state persists.
The DOWN state may or may not persist, pending on the setting of the NodeName/State parameter in
the slurm.conf file.
Table 12-4. shows the corresponding meaning of the output of the sinfo command for various transitions:
114 Managing SLURM