Changing library operating modes (peer-to-peer VTS mode control)

The Peer-to-Peer VTS mode control (PTPMC) function allows an installation or application, such as Geographically Dispersed Parallel Sysplex™ (GDPS®), to change current operating modes of the library. Upon installation of the library, the customer engineer must determine the default mode settings. (See Geographically dispersed parallel sysplex support for peer-to-peer VTS for more information on GDPS.)

Attention: In a library with outboard policy management support, the selective peer-to-peer copy mode overrides PTPMC settings. See Selective peer-to-peer copy mode for further information on the selective peer-to-peer copy mode.

Figure 1 provides the CBRXLCS Assembler macro syntax that is used to perform the PTPMC function.

Figure 1. Peer-to-Peer VTS mode control (PTPMC) assembler macro syntax

CBRXLCS  TYPE=TAPE
         ,FUNC=PTPMC
         ,LIBNAME=library-name
         [,IOLIB={PRIMARY | PREFERRED | BALANCED | DEFAULT}]
         [,COPYMODE={IMMEDIATE | DEFERRED | DEFAULT}]
         [,DEFVALUE=deferred-priority-threshold]
         [,COPYOPER={ENABLE | DISABLE}]
         [,ACCESS=RWDISCON]

When a value is requested, the keyword operand may be one of the following:

The name of the field that contains the requested value
The number, in parentheses, of a general register in the range of 2–12 that contains the address of the field