IBM Tivoli Storage Manager, Version 7.1

Diagnosing backup and restore performance

Use the flowchart to diagnose issues with backup and restore performance. The table provides more information and links to diagnostic tasks.

Figure 1. Flowchart to diagnose backup and restore performance. Use this chart with Table 1.

Table 1. Explanation of the flowchart decisions and tasks for backup and restore performance
Step	Question	Diagnostic tasks
1	Do operating system tools show a disk bottleneck on the client or server? For more information, see Identifying disk bottlenecks for Tivoli Storage Manager servers.	Yes Fix any disk issues. If applicable, check the load on the system for applications that are not related to Tivoli Storage Manager. See Tuning disk storage for the server. No Collect client and server instrumentation. See: Client instrumentation report Server monitoring script Go to question 2.
2	Does client instrumentation show high file I/O or directory process time?	Yes Go to question 3. No Go to question 4.
3	Do you have many files or a complex directory structure?	Yes Use file system or operating system tools to help improve backup and restore operations. See File space tuning. No Fix any disk issues. If applicable, check the load on the system for applications that are not related to Tivoli Storage Manager. See Tuning disk storage for the server.
4	Does server instrumentation show slow disk or tape I/O rates?	Yes Fix any disk issues. If applicable, check the load on the system for applications that are not related to Tivoli Storage Manager. See Tuning disk storage for the server. No Find the session thread for this node in server instrumentation. The thread might include the node name or you can see if the session thread ID is listed in the Activity Log to determine which node is affected. Go to question 5.
5	Does the client show high `Data Verb` time and does the server show high network time for that node’s session thread?	Yes Investigate network speeds and issues and fix any problems. See Tuning network performance. No Go to question 6.
6	Does server instrumentation show that most time is spent in database operations for that session thread?	Yes Investigate database issues, including disk and buffer pool settings. Fix any problems. See Identifying server performance problems. No IBM® support personnel can help in diagnosing performance problems by requesting certain traces and other information from the environment. The comprehensive analysis of a performance problem is a billable service that is offered to Tivoli Storage Manager customers. For information about IBM Support and gathering data for problems, see the following resources: Software Support Handbook IBM Support Assistant See also Collecting and analyzing data for performance problems.

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