Restart in a sysplex data-sharing environment

In a sysplex data-sharing environment, an IRLM is informed of z/OS® failure, IMS failure, failure of another IRLM, or loss of connection to physical locking resources.

The IRLM affected by the failure disconnects from the data-sharing group. The remaining IRLMs in the data-sharing group are referred to as surviving IRLMs.

When an IRLM is forced to leave a data-sharing group for any reason, that IRLM issues the DXR136I message, which says that an IRLM has disconnected from the data-sharing group.

The surviving IRLMs issue the DXR137I message, which says the group status has changed, and that an IRLM has been disconnected from the data-sharing group.

No operator action is required for either message. As in a nonsysplex data-sharing environment, IRLM protects resources that are locked from being accessed by other IMS systems.

Normal restart procedures can be used to restart the IRLM and its associated IMS.