The major reasons for creating EXTDATA records are to attain access to new metrics in SMF data for reporting and chargeback purposes, and for access to RMF data made available only through EXTDATA records.
The CA JARS account records are, by nature, of a fixed length. As additional information has been added to existing SMF records and new SMF records have been created, it has been a requirement for users that they have the ability to charge for these new items. By using EXTDATA records to include this new information, existing operation of the JSIMAIN program and its production of account records can remain constant. For the majority of users, the production of EXTDATA records can be omitted and the account records will suffice. However, for those whose requirements include these newer items, EXTDATA either alone, or in conjunction with the account records, provides an excellent solution.
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