Planning log streams for forward recovery logging

When a batch job is started, CICS® VR obtains the name of the forward recovery log stream defined for each VSAM data set that is updated by the batch job and is defined with FRLOG REDO or ALL. However, CICS VR can write log records reflecting updates made to one or more VSAM data sets to the same forward recovery log stream.

When deciding how many forward recovery log streams to create and how to define them to your VSAM data sets, you must consider such factors as transaction performance, work load, and recovery performance.

The MVS™ logger merges all the forward recovery log records from the various CICS VR instances onto the shared forward recovery log. Some points to consider are:

Information Information

Feedback


Timestamp icon Last updated: Friday, 29 November 2013


http://pic.dhe.ibm.com/infocenter/cicsts/v5r1/topic///dwwig/dwwig00093.html