Reducing tape mounts with tape mount management

Significant performance improvements to output tape processing can be achieved by optimizing tape usage with the tape mount management methodology. Tape mount management (TMM) provides tape performance enhancements that:

Reduce tape mounts
TMM methodology redirects new site-identified data sets to a specific storage group with the expectation that they will be migrated to tape when the amount of data warrants a tape mount.
Reduce tape inventory and maximize media utilization
TMM candidates can be written by DFSMShsm to tape in single file, compacted form with a single tape mount. DFSMShsm attempts to fill the entire tape before selecting another tape.
Improve turnaround time for batch jobs
Batch jobs using data sets that are written to the system-managed DASD buffer do not wait for tape mounts and can perform I/O at DASD or cache speeds.

Refer to z/OS DFSMS Implementing System-Managed Storage, for more information about tape mount management.