6. DATA SOURCES › 6.3 CA MICS SMF Requirements and Considerations › 6.3.3 Multi-Access Spool Environments

6.3.3 Multi-Access Spool Environments

It is essential that SMF data from a single JES spool be
combined in a single CA MICS unit data base because a single
job could be read in on one machine, executed on another, and
printed on a third.  All SMF data records for the job must be
combined to obtain valid turnaround times.  This is
accomplished by using the SMF data from all processors in the
complex as a combined input source for the daily update of a
single CA MICS unit data base.

Scheduling the update job to ensure it is done after the
individual SMF dump jobs have been run for all the processors
can be a manual process or an automated one through the use
of network-dependent job control in JES3 and through a pseudo
dependent job control in JES2.

Processor clock synchronization is essential for meaningful
turnaround measurements in the multi-spool environment.  See
Section 6.2.2 for information about clock synchronization.