276 Performance Tuning for Content Manager
10.1 Introduction
Various tuning parameters affect Tivoli Storage Manager performance. The
number of parameters that might be set in TSM is quite small. It is the tuning of
the client, server, and network options that can become very complex.
Some of the factors that affect TSM performance are:
Average client file size
Percentage of files and bytes changed since last incremental backup
Client/server hardware (CPUs, RAM, disk drives, network adapters)
Client/server operating system
Client/server activity (non-TSM workload)
Server storage pool devices (disk, tape, optical)
Network hardware, configuration, utilization, and reliability
Communication protocol and protocol tuning
Final output repository type (disk, tape, optical)
In the following sections, we cover the very basic aspects of the TSM
configuration and tuning for performance. This is only a starting point for tuning
TSM for Content Manager. For a complete list of parameters and the tuning
features in TSM, refer to the following publications:
Tivoli Storage Manager for AIX - Administrator’s Guide, GC32-0768.
Tivoli Storage Manager Problem Determination Guide; search at:
http://publib.boulder.ibm.com/infocenter/tivihelp/v1r1/index.jsp
10.2 Automatic tuning of server options
Tuning a Tivoli Storage Manager environment to achieve the best performance
requires experience, knowledge, and skill from experts, and is a time-consuming
process. The current version of TSM can automate the tuning of some of the
existing parameters and achieve more intelligent storage management.
TSM calculates performance figures, usually in throughput per unit of time, and
changes a pre-set parameter that can be adjusted during the next set of
iterations to test its effect on performance. The buffer pool is one of many
parameters that affect performance. The buffer pool size (BUFPOOLSIZE) can
be self-tuned by TSM.
For optimal performance and simplified tuning, we recommend the following
action.
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