Specifying recall tasks

DFSMShsm can perform multitasking operations on a maximum of 15 tasks that recall data sets from DASD or tape and that delete migrated data sets. These are called recall tasks.

The MAXRECALLTASKS parameter of the SETSYS command controls the number of recall tasks that can be processed at the same time. The TAPEMAXRECALLTASKS parameter specifies how many of these tasks can be recalling data sets on ML2 tape volumes. The number of tape recall tasks must be less than or equal to the maximum number of recall tasks. If the number of active tape recalls is less than or equal to the number specified by the TAPEMAXRECALLTASKS parameter, DFSMShsm performs multitask DASD recall operations up to the number specified by the MAXRECALLTASKS parameter.

Example: In the following example, if you specified 15 recall tasks and 6 tape recall tasks and if only 3 tape recall tasks were running, DFSMShsm would start as many as 12 recall tasks from DASD. You can add this command to the ARCCMDxx member in each DFSMShsm host.

SETSYS MAXRECALLTASKS(15) TAPEMAXRECALLTASKS(6)