DFSMShsm is an effective DASD storage management and productivity tool that many data centers use to automate the migration of inactive data from primary DASD to alternate storage media. However, when that migrated data is needed, HSM has to recall the data back to primary DASD. Processing delays occur when the job waits for the recall to complete.Rocket HSM Advanced Recall can eliminate this wait by pre-staging the migrated HSM data on primary DASD so that it is readily available when needed by production jobs. The length of this delay is dependent on which auxiliary storage the data set is migrated to, on the availability of system resources, and also on the number of recalls that are issued by other tasks.
Lengthy HSM recall delays can slow down your batch processing. HSM Advanced Recall recalls the migrated data so that your batch jobs do not wait for a recall. Batch cycles finish faster and online processes aren't delayed.
HSM Advanced Recall offers time savings that can especially be noted when processing weekly, monthly, and yearly cycles. This data is more likely to have been migrated by HSM due to age or inactivity. Pre-staging this migrated data allows the periodic cycles to complete much faster.
HSM Advanced Recall is an intelligent tool that can determine if any of the migrated datasets it is scheduled to recall have already been recalled, and bypasses those datasets.