Configuring the Parameter Library (Parmlib) › The Parameter Library (PARMLIB) › Operational Considerations › Preserving External Logger Data

Preserving External Logger Data

The CA Vtape logging facility writes log events into a dataspace. The logged data is small in size and is accumulated into 24576-byte logical blocks. When a logical block becomes full and external logging is active, the block is written to the IBM log stream that was defined during System Setup.

To ensure that the data written out to the log stream is accessible for a longer period of time, without the cost of keeping the data on DASD, we recommend that you archive the log stream data to Virtual Volumes.

You can find sample JCL for this task in HLQ.CCUUJCL(GENLOGR).

Saving the logged events for a longer period of time allows the data to be used like SMF data to look for trends, create historical reports, and diagnose problems.