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DS8800 Performance Monitoring and Tuning
book

DS8800 Performance Monitoring and Tuning

by Gero Schmidt, Bertrand Dufrasne, Jana Jamsek, Peter Kimmel, Hiroaki Matsuno, Flavio Morais, Lindsay Oxenham, Antonio Rainero, Denis Senin
July 2012
Intermediate to advanced content levelIntermediate to advanced
726 pages
26h 28m
English
IBM Redbooks
Content preview from DS8800 Performance Monitoring and Tuning
Chapter 6. Performance planning tools 221
6.5 Disk Magic Easy Tier modeling
Disk Magic supports DS8000 Easy Tier modeling for DS8800 and DS8700 multi-tier
configurations. The performance modeling that is provided by Disk Magic is based on the
workload
skew level concept. The skew level describes how the I/O activity is distributed
across the capacity for a specific workload. A workload with a low skew level has the I/O
activity distributed evenly across the available capacity. A heavily skewed workload has many
I/Os to only a small portion of the data. The workload skewing affects the Easy Tier
effectiveness, especially if there is a limited ...
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Publisher Resources

ISBN: 0738436836Purchase book