Changing the FASTREPLICATION default setting during Copy and Defrag (OA11637)

During DEFRAG and COPY operations, fast replication method is used when it can be; this is considered FASTREPLICATION(PREFERRED) which is the DFSMSdss default setting when the FASTREPLICATION keyword is not specified. The FASTREPLICATION keyword overrides this default.

DFSMSdss now provides a patch byte that allows you to change this default setting to not use fast replication unless you specify FASTREPLICATION(PREFERRED) or FASTREPLICATION(REQUIRED).

The FASTREPLICATION default is affected by setting the flag at offset X'4F' in ADRPATCH. The settings are:

X'00': If the FASTREPLICATION keyword is not specified, thenDFSMSdss processes as if the FASTREPLICATION(PREFERRED) keyword was specified.
Any setting other than X'00': If the FASTREPLICATION keyword is not specified, DFSMSdss processes as if the FASTREPLICATION(NONE) keyword was specified.

Note: The Options Installation Exit Routine, ADRUIXIT, allows the final override to the FASTREPLICATION setting. In this exit there is no indication that the FASTREPLICATION setting is the default or if the keyword is specified.

To set the flag on (for example, X'FF' ), modify the sample JCL (see Sample JCL) as follows:

//SYSIN DD *  
    NAME ADRDSSU ADRPATCH  
    VER   4F        00  
    REP   4F        FF