StorageTek 6 Monitoring Library Activity and Performance, Using the Activities Report Utility

How Systems Programmers Control Library Performance

Systems programmers command extensive control of overall library performance. This control of performance is inherent with how a systems programmer:

•initially configures the library (during the LIBGEN process)

•uses available utilities and commands

•monitors and analyzes performance

•participates in the development of standard methods and procedures for the data center.

How Operators Control Library Performance

An operator may participate in the initial configuration of a library; however, an operator usually does not have control to change the majority of the static parameters set for library operation at installation time. There are exceptions. Some commands relate to the same functions initially set by PARMLIB control statements. These commands are available for use by an operator for resetting some library parameters initially set at HSC installation and initialization.

An operator impacts library performance primarily during daily operations with the use of operator commands. These commands may be used when operator intervention is required or when it is necessary to reset some static library parameter to improve performance.

Monitoring Library Activity and Performance

There are several methods to monitor library activity and performance:

•running the Activities Report utility to produce a detailed report identifying performance values for various library activities.

The data in the report can be easily analyzed to produce performance criteria for your installation.

•using the StorageTek Performance Measurement and Predictive Maintenance System (PM2) to collect performance information.

•using Expert Library Manager (ExLM) to monitor performance and to balance workload. For more information on ExLM, refer to the Expert Library Manager User Guide and Reference.

Using the Activities Report Utility

The Activities Report utility can be used to effectively record, monitor, and analyze library performance. Running the utility on a regular basis in addition to comprehensive analyses can provide you with information disclosing total performance characteristics for your library.

The Activities Report utility generates a report listing relative activity by volume groups. Information reflected on this report can be used to redistribute resources and, if necessary, to balance the cartridge activity load in a library.

412VM/HSC 6.0 System Programmer’s Guide

1st ed., 6/30/04 - 312579601