Availability Guide for Change Management

Reducing the Time Required for Planned Outages
Availability Guide for Change Management–125506
6-2
Anticipating and Planning for Change
Tandem provides a wide variety of tools that provide data useful for your growth
forecasts. These tools can help you determine future resource needs by providing
information on percentage growth in disk utilization, processor utilization, and I/O.
Table 6-2 lists some of the tools available to help you forecast growth.
The Availability Guide for Performance Management describes all of Tandem’s
performance-management tools and provides guidelines for performance-management
tasks.
Table 6-1. Performance-Management Tasks
Task What it involves
Application sizing Forecasting the effects of new applications on your system
through the use of models to determine how well new
applications will handle their intended workloads.
Application sizing helps you plan for growth in system
workloads caused by new applications.
Capacity planning Forecasting future capacity needs based on performance
trends and the growth in users, applications, and your
company’s business. Capacity planning helps you plan for
growth in system workloads based on business growth.
Performance analysis and tuning Measuring system performance and acting on the results
of the measurements in order to improve system
performance and availability.
Usage accounting Tracking the use of system resources for accounting
purposes. Usage accounting helps you plan for system
growth if user activity is known in sufficient detail.
Table 6-2. Tools for Evaluating System Performance and Growth
Tool What it does
Measure Collects and displays resource usage statistics for the local
system
Tandem Network Statistics
Extended (NSX)
Collects and displays resource usage statistics from multiple
network nodes to one or more locations in a network
Guardian Performance
Analyzer (GPA)
Analyzes system performance data gathered by the Measure
product and makes recommendations for improving overall
performance of the system
Tandem Capacity Model
(TCM)
Collects resource usage information and converts it to
transaction-oriented data that can be used for capacity
planning
Note. Tandem alliance partners also offer performance-management products and services.
For more information about the Alliance program, contact your Tandem representative.