Controlling the log merge

To control the log output, you need to:

• Choose the required systems that participate in the logical link paths you want to examine.
• Coordinate the series of input logs for each system so that they cover a similar time span.
• Specify a start and stop time for the Log Merge utility control statements if you want to sample the cross-system processing for a particular interval.

  You can give both start date (Julian) and time of day, or just time of day. It is the first system log (specified by the LOG01 DD statement) to which these times apply. Other log activity is collected if it falls between the initial and final events that are present on the first log.

• Specify MSG to select log records that are suitable for the transaction analysis step. (ALL records is the default, but this means the DL/I activity for several systems is included in the utility input, and this can cause extended processing time.)