Creating the communications data set
To create the Communications Data Set (COMMDS), member GTDALCCM, which is located in SGTDSAMP, is necessary.
Note: The Communication Data Set must be on a
cylinder boundary with contiguous space. It must reside on a device
that supports CKD/E.TDMF may attempt to exploit the Parallel Access
Volume (PAV) and/or Cache Fast Write (CFW) features if available for
the Communications Data Set device. This processing comes into effect
for Agent systems if the device supports PAV and there are at least
11 volumes in a session. For the Master system, the trigger for PAV/CFW
utilization is more complicated and involves both the number of volumes
and the number of Agent systems; therefore, for a large migration
session, a performance improvement can be expected if the Communications
Data Set is allocated on a device that supports both PAV and CFW.