IMS OM Audit Trail Help

For all type 1 and type 2 commands entered through OM, OM will log the command input before calling the OM Input user exit, and after calling the OM Input user exit only if the exit altered the command input. OM will also log the command response output before calling the OM Output user exit, and after calling the OM Output user exit only if the exit altered the command response output. OM will log any unsolicited output messages received through the CSLOMOUT API. For example, IMS invokes CSLOMOUT to send MTO and/or system console related system messages to OM (eg. DFS system messages). OM does not care about the entry in the log structure after the log information is written. The log information can be formatted and viewed by using any of three IBM supplied utilities: CSLOERA3, CSLULALE, TSO SPOC Audit Trail Viewer.

Number of Operational Managers per Logstream

IBM recommends that you do not have more than two OMs share the same audit trail log data stream.

Writes per Second

The number of log blocks written to the log stream per second from a single system.

LowOffLoad

Specifies the percent value you want to use as the low offload threshold for the coupling facility for this log stream. The low offload threshold is the point in the coupling facility, in percent value of space consumed, where system logger stops offloading coupling facility log data to log stream DASD data sets. The value of LOWOFFLOAD is the percent of log data system logger leaves in the coupling facility.

See z/OS MVS Setting Up a Sysplex for additional information about the offload threshold parameter.

The value specified for LOWOFFLOAD must be less than the HIGHOFFLOAD value.

This value is specified as a percentage. Enter this value as a whole number. For example, if the threshold is 20 percent, enter 20.

HighOffLoad

When a coupling facility list structure is filled to its high offload threshold point or beyond, the MVS system logger begins the removal of data from the coupling facility by either deleting log blocks no longer needed by OM or by moving data to the DASD log stream offload data sets. For OM log streams a value of 50% is recommended.

See z/OS MVS Setting Up a Sysplex for additional information about the offload threshold parameter.

This value is specified as a percentage. Enter this value as a whole number. For example, if the threshold is 50 percent, enter 50.