
Chapter 2. Hardware configuration planning 33
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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 ...