Time reduction to perform CRG switchover

When performing a switchover of a device Cluster Resource Group (CRG), the job queue that is specified in the job description for the interactive user that is performing the switchover is used to vary off and on the Independent Auxiliary Storage Pool (IASP). This use of the job queue might result in the switchover taking longer than expected if the user profile performing the switchover has its job queue set to a queue that is either held or has a low maximum limit of active jobs. For example, if the user performing the switchover has QDFTJOBD set as the job description, the IASP vary jobs are submitted to the QBATCH job queue.

Because the QBATCH job queue might be held or might allow only one active job at a time, the switchover can be held up for a long time. The behavior is changed; both planned switchovers (performed with the Initiate Switchover API) and failovers now automatically use the QSYSNOMAX job queue for IASP vary on and off operations, regardless of the user profile initiating the operation. For selected configurations, this new behavior reduces the amount of time required to perform the CRG switchover because there is no limit on the number of active jobs.