Fast replication image copies

You can create fast replication image copies by using the fast replication option of the Database Image Copy 2 utility (DFSUDMT0).

The DFSUDMT0 utility uses the z/OS® DFSMSdss COPY command with the FASTREPLICATION keyword.

By using the fast replication option of the DFSUDMT0 utility, you can create image copies more quickly than other image copy methods. You can create clean or concurrent fast replication image copies and register them with DBRC for use by the Database Recovery utility (DFSURDB0) during recovery procedures.

Fast replication image copies are exact copies of the input data sets and are not formatted like image copies taken by the Image Copy 2 utility using the DFSMSdss DUMP command with the CONCURRENT keyword.

DFSMSdss fast replication requires hardware support of either the FlashCopy® feature of the IBM® Enterprise Storage Server® (ESS) or the SnapShot feature of the IBM RAMAC Virtual Array (RVA) storage system.

The Image Copy 2 utility is the only IMS image copy utility that supports fast replication image copies.