Batch backout data set statistics description

This batch backout data set statistics report contains information about the type of updates for that were backed out from each VSAM data set. This report is repeated for every VSAM sphere that CICS® VR batch backout processing updated.

The following information is provided:
Job name
Name of job that performed the updates that CICS® VR backed out.
Job ID
JES job ID of the job that performed the updates that CICS® VR backed out.
Base name of backed out data set
The name of the VSAM base cluster that CICS® VR applied the log records to.
Base name of original data set
The name of the VSAM base cluster that the batch job initially updated.
First and last log records applied
The time-stamps of the latest and the earliest before-image log records that were applied to the VSAM data set. The dates and times are taken from the before-image. Time type identifies the time format of the dates and times listed.
Note:
CICS® VR batch backout processing reads the undo log stream from youngest to oldest.
Job step name
Names of the steps in the batch job that performed the updates that CICS® VR backed out.
Number of before image log records
For each VSAM data set, the total number of log records found on the undo log stream that relate to the VSAM data set for the specified job step.

If CICS® VR batch backout terminated with an error, these statistics might not match the number of records shown in the Batch Backout Job Step Statistics report.

The following types of log records listed in the NUMBER OF RECORDS field causes one of the matching actions to occur during batch backout processing:
Type of log record Action performed against the VSAM data set
UPD-BEFORE

UPDATES
ADDS
ADD-BEFORE DELETES
For example, if CICS® VR finds an ADD-BEFORE log record during batch backout processing, this indicates that a VSAM sphere record was added by a batch application. Therefore, this causes CICS® VR to perform a DELETE of the actual VSAM record.

If CICS® VR finds an UPD-BEFORE log record during batch backout processing, this indicates that either a VSAM sphere record was updated or deleted by a batch application. Therefore, this causes CICS® VR batch backout to perform either an ADD or UPDATE to the actual VSAM sphere.

Number of changed VSAM records
Indicates the number of each type of action CICS® VR performed against the VSAM sphere during batch backout processing.
Note:
The TOTAL row summarizes the number of before-image log records and changed VSAM records for the corresponding VSAM data set. The OVERALL TOTAL row summarizes the number of before-image log records and changed VSAM records for all of the VSAM data sets that were backed out.
Changes ignored by exit
The number of before-images that were ignored due to the action code returned from the CICS® VR batch backout ESDS delete exit.