[email protected] (Mark Jacobs - Listserv) wrote:
We have a VSAM KSDS that was allocated and populated with data prior to
the CA/Reclaim function being available. This evening we had to reorg
the dataset, and the REPRO back used the same physical dataset with the
REPLACE and REUSE options.
Does this enable CA/RECLAIM for the dataset, or do we have to allocate
an entirely new KSDS?
There are three controls for CA reclaim.
1. At the system level, in IGDSMSxx, the setting of:
[CA_RECLAIM(NONE|{DATACLAS|DATACLASS})]
2. At the DATACLAS level for new SMS-managed data sets, the setting of
CA Reclaim, which will affect what is set in the catalog when a data set
is allocated.
3. At the data set level, in IDCAMS, what you specify for
RECLAIMCA|NORECLAIMCA on an ALTER command. ALTER, of course, works for
existing data sets.
The z/OS V2.1 Init & Tuning Reference says the default for (1) remains
"NONE." There is also an INFO APAR about CA Reclaim enablement that I
have not read, II14640, which you might find helpful.
Also, note that CAs that are empty when the system or data set is
enabled won't be reclaimed immediately, if ever. So you might need "one
last reorg." Or not, depending.
HTH,
--
John Eells
z/OS Technical Marketing
IBM Poughkeepsie
[email protected]
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