DFSMShsm Common Recall Queue Help

The DFSMShsm common recall queue enables all hosts in an HSMplex to place their recall requests onto a single queue. This allows the recall requests to be balanced across the HSMplex. It also enables tape mount and priority optimization.

The common recall queue should be sized such that it can contain the maximum number of concurrent recalls that may occur. Due to the dynamic nature of recall activity, there is no exact way to determine what the maximum number of concurrent recall requests may be. Due to this, IBM recommends that you use a structure size large enough to manage at least 3900 concurrent recall requests, which should be enough for most environments. The CFSIZER will enforce a minimum structure size sufficient to manage at least 1700 concurrent recall requests.

Maximum number of concurrent recalls

Specify the number of concurrent recalls

Average percentage of recalls from ML2 tape

Specify the average fraction of recalls from tape