IBM E16RMLL-I Implementation Guide - Page 525
Architecture-based performance tuning
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Restore function invoked. Restoring 524,288,000 /home/root/500MBFile [Done] Restore processing finished. Total number of objects restored: 1 Total number of objects failed: 0 Total number of bytes transferred: 500.06 MB Data transfer time: 41.12 sec Network data transfer rate: 12,452.21 KB/sec Aggregate data transfer rate: 11,026.84 KB/sec Elapsed processing time: 00:00:46 This example should provide you with a basic idea of the steps needed to approach and investigate Tivoli Storage Manager performance-related questions within your environment. Often the first clue to a performance problem is unexpected results. These symptoms should be documented for later analysis and possible correlation with log data provided by the client and the server. Performance tuning is an iterative process and usually the first performance trace leads to further tracing on either the client, the network, or the server. Document your changes to the configuration and keep track of the results after the changes are applied. As described in 15.1, "How to measure performance" on page 482, the number of influencing factors is huge, and each requires detailed consideration to increase overall performance. Note: If archive performance is an issue, make sure to consult Appendix A, "Using TSM's Archive Function," in the Tivoli Storage Manager Performance Tuning Guide, SG32-9101. 15.2 Architecture-based performance tuning In this section we describe design considerations for a Tivoli Storage Manager implementation. We first offer conceptual guidelines to follow, as well as provide a list of parameters for precise tuning. Chapter 15. Performance considerations 495
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