Migration volume contention priorities
Because DFSMShsm migration volumes can also be involved in recall, recycle, tape copying, and aggregate backup activities, you must understand the usage priorities for your migration volumes. DASD ML1 volumes with small data set packing data sets allocated on them and tape ML2 volumes can interact with other functions that have a greater usage priority. When this interaction occurs, you may not get the results you are expecting.
Related reading
- For more information about the contention issues that can arise with DASD ML1 volumes with SDSP data sets allocated on them and tape ML2 volumes, see SDSP data set contention and Tape migration level 2 volume contention .
- For more information about the contention details related to the common recall queue, see Common recall queue environment.