Modes of the RECON Reorg utility

• In Replace mode, the utility discovers any RECON data set that is discarded or unavailable and calls IDCAMS to perform a delete and define of the data set. The the utility calls DBRC with a LIST.RECON STATUS command to force a copy of the active RECON into the newly defined data set or to set the data set to SPARE status. If Replace mode is recommended, the RECON data set has a serious problem and you might want to run the utility as soon as possible.

• In Reorg All mode, the utility systematically handles reorganizing each data set until the RECONs are ordered with RECON1 as COPY1, RECON2 as COPY2, and RECON3 as SPARE. To accomplish this action, the utility performs the DBRC command CHANGE.RECON REPLACE, followed by a call to IDCAMS to delete and define the newly discarded RECON data set.

  In Reorg All mode, all RECON data sets are involved; therefore, it is important to run the utility when no batch processes are executing and online IMS activity is low. The utility must be able to obtain an exclusive enqueue on each RECON data set to be able to delete and redefine it. Several parameters in the RECON Thresholds/Operational Controls category control how the utility handles RECON contention conditions.

The RECON UTILITIES solution generates JCL for the utility to execute in the correct mode, depending on the type of exception that was reported for the RECON object.