RRS uses a single XCF group, called ATRRRS, to communicate between
images in a sysplex. No special processing is required by an installation
to enable RRS usage of XCF. You do not need to modify XCF transport
classes. See z/OS MVS Setting Up a Sysplex for
more information.
Should the need arise where a z/OS® V1R10 system needs to fall back to a lower
release, a fallback toleration APAR, number OA23153, should be installed
to allow the lower level of RRS to start and preserve the Archive
Logging preference from the SETRRS command. Without this APAR on the
lower level system, RRS will not be able to start on that system.
This will be identified with the messages:
- ATR235I RRS FAILED TO JOIN THE RRS XCF GROUP. RC = 00000008,
RSN = 00000010
- ASA2013I RRS INITIALIZATION FAILED. COMPONENT ID=SCRRS
In this case, RRS must be removed from the XCF group on the lower
level system to allow the RRS restart. This can be done by the following
steps:
Steps to Remove RRS from XCF:
Note: When completed, the Archive Logging Enable/Disable
setting on the V1R10 system will be deleted.
- Set up the proper access authorization to the Facility Class Resource
MVSADMIN.XCF.IXCM2DEL. If your installation uses the RACF® component of SecureWay for z/OS, this can be done from an authorized userid
using the following commands:
- RDEFINE FACILITY (MVSADMIN.XCF.IXCM2DEL) UACC(ALTER)
- SETROPTS RACLIST (FACILITY) REFRESH
- Code up, submit, and review the output from the following JCL
sample. The source for the JCL can be found in SYS1.SAMPLIB member
IXCDELUT and more details can be found in the Deletion
Utility for XCF Group Members section in z/OS MVS Setting Up a Sysplex.
//IXCDELUT JOB
//S1 EXEC PGM=IXCM2DEL,PARM='ATRRRS,mem01'
//SYSPRINT DD SYSOUT=A
Where: mem01 is the member name of the member to be deleted.
mem01
can be determined by issuing system command: D XCF,GROUP,ATRRRS
which
results in message: IXC332I 09.49.44 DISPLAY XCF
GROUP ATRRRS: SY1 SY2
Using the above
display as an example, mem01 should be replaced with either SY1 or
SY2 depending on which system RRS is being removed from.
- Upon successful completion of the JCL job, RRS will now be able
to start on the lower level system.