FlashCopy® for XRC
Remote Pair FlashCopy® (RPFC) is a solution for mirroring the results of a point-in-time copy (FlashCopy) from the primary volumes to the secondary volumes in a remote mirror configuration, without disrupting the mirror or consistency at the remote site. RPFC captures the parameters of a FlashCopy and sends those parameters to the secondary volumes, replicating the operation.
Remote Pair FlashCopy® for zGlobal Mirror (zGM or XRC) allows you to perform a FlashCopy between primary volumes at the application site which then get mirrored at the remote (D/R) site. This initiates a FlashCopy between secondary volumes without disrupting the mirror or consistency at the remote site.
See Figure 1 for an illustration of RPFC for XRC.
In order to use RPFC for XRC, the primary volumes must be in an active XRC session. When the FlashCopy is initiated at the application site, the primary pair may be in full duplex, copy, or pending state.
- Specifying the FCTOXRCPrimary keyword on the DFSMSdss COPY command. It is supported on all COPY commands, including FULL, TRACKS, and DATASET, for logical and physical data sets. Do not use the FastReplication(NONE), COPYVolid, or FCFastReverseRestore keywords with the FCTOXRCPrimary keyword.
- Specifying FLASHCOPYTOXRC=YES in the DEVSUPxx member of parmlib and activating the parameters
- Specifying RemotePairFlashCopy(YES) in the ANTXIN00 member of parmlib. This parameter takes effect only during XSTART. It cannot be changed using XSET while the session is active.
For more information, see Remote Pair FlashCopy for XRC.