SCC Monitor supports three types of monitoring: Snapshot and Interval which perform data sampling, and Real-time which is event driven. This manual covers the Real-Time monitor. For documentation on the Snapshot and Interval Monitors, examine the MON- SNAPSHOT manual.
Snapshot : The MONRUN program (MON-SNAPSHOT) can be executed as a batch job or started task. The information monitored or data collected is relevant only at the time that the Monitor executes. A Snapshot is simply a sample taken at any given point in time.
Interval : You can also take periodic snapshots, or Interval monitoring. If the interval length is rela- tively short the MONRUN program should be executed as a started task with a WAIT parameter to define a sample interval. If the interval length is fairly long, you can establish an interval by using a job scheduler to execute a Snapshot request at specific times during the day.
Real-time : MON-RTM is an operating system extension that gets control whenever a data set is cre- ated, extended, renamed, released (RLSE) or deleted. The RTM component can also be used to capture the HSM log records as they are written to SMF. This form of monitoring is event driven, so the data collected by RTM is valid at any given moment in time.
RTM is activated when the DIF START RTM command activates the operating system extensions. This command is usually processed during DIF initialization when the com- mands in the START00 parmlib member are executed.