An optional new mode of performing updates to the CA 1 Audit file provides significant performance improvements. The mode is intended for customers with high tape-activity environments where the CA 1 TMC and Audit are shared between multiple systems.
Activation of this feature is accomplished by defining a new Audit data set with a control statement requesting "BLOCKSET" mode processing. All systems sharing the TMC and Audit are started with the maintenance applied (enabled by PTF on release 12.6) and the Audit is initialized with BLOCKSET mode. The routines accessing and updating the Audit file reserve blocks of Audit records for the systems sharing the TMC and Audit. Every update of an Audit record is written to DASD immediately but RESERVE activity is performed only when new blocks are assigned to a system. The functionality significantly reduces the RESERVE activity and number of IOs. If BLOCKSET mode is in use, a new "Control Record 5" is added to the Audit file. User-written programs accessing the Audit directly are examined for compatibility with BLOCKSET mode.
Only customers who initialize the Audit in BLOCKSET mode see differences in CA 1 processing.
Note: For more information, see the CA 1 Utilities and Reports Guide.
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