How can I prevent CA-ACF2 from taking an automatic backup on all my systems (LPARs) that share the same ACF2 databases?

Document ID : KB000026320
Last Modified Date : 14/02/2018
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Issue:

I have a multi-system environment where all the LPARs share the same ACF2 databases. I want the ACF2 backup task to run on one LPAR. Currently, all the LPARs are taking daily CA-ACF2 backups.

By default, ACF2 will perform a backup on each LPAR unless there is an override that causes ACF2 to not take the scheduled ACF2 backup. In a multi-system environment, you need to make this override so that each system (LPAR) will not take a backup of the same set of ACF2 clusters. To make this override, change the ACF2 GSO BACKUP record so that the backup time is 00:00.

Resolution:

For example, say you have three systems (LPARs) sharing the same ACF2 databases. You have decided that the system "C" LPAR (SYSID = SYSC) should take the backup of the ACF2 databases 5 minutes after midnight. The other 2 systems, A and B (SYSA and SYSB) should not backup the ACF2 databases.

The following ACF2 commands will accomplish this goal:

ACF
SET C(GSO)
SET SYSID(SYSA)
CHANGE BACKUP TIME(0:0)
 
SET SYSID(SYSB)
CHANGE BACKUP TIME(0:0)
 
SET SYSID(SYSC)
CHANGE BACKUP TIME(0:5)

To implement this change, issue the following refresh on each system (LPAR):

F ACF2,REFRESH(BACKUP)

After this change is implemented, ACF2 will take a backup at 5 minutes after midnight on SYSC and no ACF2 backups will occur on the other systems.

The CA ACF2 Administrator Guide contains additional information related to the GSO Backup record, in the chapter on "Maintaining GSO Records".

 

The other situation is you are sharing the GSO record on all systems.  In that case, CA ACF2 will need to be started with the NOBACKUP parameter in the CAIACFxx member, or with the S ACF2,PARM=NOBACKUP

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