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The members of the logical parmlib provide most of the parameters that tailor the computer’s resources to meet the specific needs of the data center. These members determine which libraries have APF authorization, what subsystems run on the system, and the performance parameters in effect on the system. Parameters change as needs change. Because logical parmlib members are subject to change, you should monitor them closely.
CA Auditor detects changes to logical parmlib members by using a digital signature algorithm. Each time that an CA Auditor user at the data center selects the Parmlib Member Status option, CA Auditor “freezes” each logical parmlib member, which creates a “digital signature” for each member. Then CA Auditor compares these signatures to the most recent ones. If a member was changed since the last time this option was used, the member is marked as CHANGED and the current date is entered in the CHANGE DETECTED field. This method is 99.998 percent accurate in detecting changes.
When different users at the same data center select the Parmlib Member Status option on a daily basis, CA Auditor displays the status for a changed member as CHANGED and fills in the current date for the first user of the day. However, successive users of this display see Unchanged in the CURRENT STATUS field for this member. This is because CA Auditor freezes and compares each member of the logical parmlib for this option and, if no changes occur between the times this display is used, CA Auditor does not detect a change.
To review PARMLIB member status
The PARMLIB Member Status screen lists the specific logical parmlib data sets used for this analysis.
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