IDCAMS ALTER

The IDCAMS ALTER command allows you to change the attribute for CA reclaim for a KSDS after it is defined. You might use this command to disable CA reclaim for specific data sets after enabling CA reclaim for the system. The command will take effect at the first OPEN following the CLOSE of all open ACBs against the data-set control block structure. The related parameters on the ALTER command are:

RECLAIMCA | NORECLAIMCA

where

RECLAIMCA: Enables CA reclaim for the data set. For CA reclaim to be in effect for the data set, CA reclaim must also be in effect for the system, either with PARMLIB member IGDSMSxx or a SETSMS command.
NORECLAIMCA: Disables CA reclaim for the data set.

ALTER has no default values. For more information, see the topic about ALTER in z/OS DFSMS Access Method Services Commands.

The LISTCAT command, in the CLUSTER section, describes the cataloged CA reclaim attribute for the KSDS. It does not reflect the setting in the IGDSMSxx member of PARMLIB or the SETSMS command.

In the INDEX section, LISTCAT displays the number of CAs reclaimed, in the REC-DELETED field, and the number of reclaimed CAs that have been reused since the KSDS was created, in the REC-INSERTED field. The REC-TOTAL field is the total number of index records for all index levels, including those that were reused and are hence in the active index structure, and those that were reclaimed.