Formatting page sets (FORMAT)
Use the FORMAT function to format page sets on all data sets specified by DDnames CSQP0000 through CSQP0099. In this way, we can format up to 100 page sets in a single invocation of the utility program. Use the FORCE keyword to reuse existing data sets.
We can also use the FORMAT function to change the recovery processing that is performed against page sets when the queue manager starts, using the TYPE keyword. This can assist in changing or recovering page sets, or reintroducing page sets that have been offline.
In summary, to reinstate a page set with:
- No data, use TYPE(NEW)
- Old data, use TYPE(REPLACE)
- Old data brought up to date, do not use FORMAT but start the queue manager with a backed-up copy of the page set
Page sets have identifiers (PSIDs, in the range 00 through 99) which are established by the DDnames used for the data sets in the queue manager started task procedure; DDname CSQP00nn specifies the page set with identifier nn. The DDnames you use for the FORMAT function do not have to correspond to those used in the queue manager started task procedure, and do not therefore have any significance regarding page set identifiers.
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