Writing Rules › What Are Rule Directories? › Specifying Resident Directories and Rule Sets

Specifying Resident Directories and Rule Sets

The GSO INFODIR record indicates which CA ACF2 Option for DB2 rule directories are built and made globally resident at CA ACF2 initialization. The GSO INFODIR record also controls whether the CA ACF2 Option for DB2 rule sets associated with the directories are made globally resident, locally resident, or transient.

• Globally resident rules are kept with the rule directories in CSA. They are immediately available to the rule interpreter and, therefore, provide the highest performance.
• Locally resident rules are made resident in the requesting user's address space on a demand basis. With this setting, CA ACF2 Option for DB2 loads the rules as needed and keeps them in local storage. This technique improves performance while sacrificing storage in the user's address space.
• Transient rules are never made resident. CA ACF2 Option for DB2 loads them into the user's address space on a demand basis, but releases them after validation. While transient rules increase the amount of I/O performed to the database, you can continue to use masking with rules because a directory is available.

Note: To use the long resource names possible in DB2 release 8.1 and above, you must use globally resident directories and globally resident resource rules. For more information on globally resident directories and resource rules, see “Using the GSO INFODIR Record.” For information about other requirements for long resource names, see the Insert Application Definitions step in the “Installation” chapter of the Getting Started.