Starting the IRLM

You use the internal resource lock manager (IRLM) to perform block-level or sysplex data sharing. If you are running an IMS DB/DC or DBCTL environment, start the IRLM from the z/OS® system console using the z/OS START command.

You must start IRLM subsystems before starting the IMS batch or online subsystem. The IMS online subsystem identifies itself to the IRLM subsystem during IMS initialization or restart.