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IBM TotalStorage DS6000 Series: Performance Monitoring and Tuning
book

IBM TotalStorage DS6000 Series: Performance Monitoring and Tuning

by Cathy Warrick, Craig Gordon, Benoit Granier, Keitaro Imai, Rosemary McCutchen, Brannen Proctor, Jim Sedgwick, Paulus Usong, Mary Ann Vandermark, John Wickes
December 2005
Intermediate to advanced content levelIntermediate to advanced
530 pages
18h 34m
English
IBM Redbooks
Content preview from IBM TotalStorage DS6000 Series: Performance Monitoring and Tuning
Chapter 2. Hardware configuration planning 33
.
Figure 2-11 Read intensive - 15K rpm versus 10K rpm drives
Figure 2-11 illustrates the example when a read intensive workload was run on both the 10K
rpm and the 15K rpm configurations. The 15K rpm configuration performs better, always
delivering lower response times for all throughputs as compared to the 10K rpm configuration.
You can appreciate comparing the results in Figure 2-10 on page 32 and Figure 2-11, that
when running a higher cache hit ratio workload, the performance gain is less significant, than
when running the lower cache hit ratio workload.
For more detailed estimation, see 4.1, “Disk ...
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Publisher Resources

ISBN: 0738494119Purchase book