A rule directory is a list of infostorage record keys that point to CA ACF2 Option for DB2 rule sets in common storage or on a Direct Access Storage Device (DASD). The main function of rule directories is to make CA ACF2 Option for DB2 rule sets readily available to CA ACF2 Option for DB2 systems by reducing the amount of I/O processing. The use of directories lets you copy the rule sets from the Infostorage database and keep them in resident (global or local) storage. The use of rule directories also permits you to use CA ACF2 masking with CA ACF2 Option for DB2 rules.
A globally resident directory is accessible to any DB2 subsystem because it is stored in the extended common storage area (ECSA).
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