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Defines VSAM clusters for the Db2 defined objects (as optional)

Reference to Case number TS002663644

This is for using "Db2 Recovery Expert disaster recovery feature - Recovering at the remote site using DB2 image copies":

During Disaster Recovery tests some Db2 subsystems found indoubt and inflight threads at Db2 subsystem startup and, as result, some of db2 objects ran on Logical Page List (RW,LPL) status. To fix that we manually ran RECOVERY INDOUBT command to get rid of IMS thread found. DBAs ran idcams to "define the underlying VSAM LDS that were missing", ran Db2 command -start db() sp(<spacenam) acc (rw) followed by recovery tablespace utility.

The big concerns here is about RE not designed to generate the VSAM clusters for Db2 defined objects. We can see ALLC member contains IDCAMS define statements ONLY for Db2 SYSTEM catalog/directory, BSDS and ACTIVE LOGS.

The request is to generate the IDCAMS DEFINE statements for applications Db2 defined objects similar to what RE have on ALLC member, but being generated in another separated member (I would said ssidALLD). Doing that, the customer will have all their application Db2 defined objects IDCAMS DEFINE statements saved in a member and it could be useful at somehow, like on indoubt thread recovery situation.

  • Avatar32.5fb70cce7410889e661286fd7f1897de Guest
  • Oct 25 2019
  • Planned for future release
Who would benefit from this IDEA? the customer, since it would be a good feature to provide a consistency of data during recovery process.
How should it work?

For all others Db2 defined objects (user application objects) there is no IDCAMS define statement generated and, obviously, there is NO pre-definition/allocation before running RECOVERY utility. The user application db2 objects (application tablespaces) got redefined/recreated by RECOVERY utility (in the fly) I think using the Db2 catalog space information. BUT, on the situation stated on this CASE, where there were some INDBOUT threads and we had to deal with that manually by running a RECOVERY INDOBUT command this requires the VSAM dataset be defined/pre-allocated otherwise you will see message DSNPCNP0 - ERROR IN ICF CATALOG reported on this case previously.

To fix that DSNP012I message , DBAs had to manually get the idcams control card for that TS SCONTRCT using Db2 admin tool and redefined those missing underlying VSAM LDS datasets before recovering it. They were expecting to see the control cards for application Db2 defined objects saved in somewhere, like ALLC does for Db2 system catalog/directory/bsds/active logs.

As previously mentioned in that case, if you look at ssidDELC member we can see there are IDCAMS DELETE command statement for all Db2 objects (system and application) and, looking on ALLC we can see statements only for Db2 system objects.

Idea Priority Medium
Priority Justification To provide a consistency of the data when using "Recovering at the remote site using DB2 image copies" dRE feature
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