Transaction accounting record layout
The transaction accounting record (TAR) contains a fixed segment, a DBD variable segment, an optional DB2 variable segment, an optional MQ variable segment, and a response variable segment. Additionally, a terminal segment is included in the fixed segment portion.
The maximum number of DBT segments allowed in the TAR IRUF DBT is 228. The way segments are processed is:
- First, all DBT segments in the X'FA' record are processed.
Then, if the MAXSEGS value is exceeded (see Log-Edit-input-parameters), the most significant segments are identified and are written to the TAR IRUF trailer individually.
The significance of a segment is determined by the total of the DL/I and I/O counts for each DB-DBT segment.
The counts for the remaining segments are combined in the OTHERS segment and are written to the IRUF trailer.
If ddname information was requested through the IMFECP00 member, the counts for the ddname segment are added to the related DB-DBT segment counts for determination of significance. When the TAR record is created, the primary DB-DBT segments are immediately followed by their related DD-DBT (ddname) segments.
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