Compaq ProLiant 1000 I/O Performance Tuning of Compaq Servers - Page 30

shows the expected increase in performance for 10K RPM drives when used in a RAID, array.

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I/O Performance Tuning of Compaq Servers 30 60 Read Latency - 7,200-rpm Write Latency - 7,200-rpm 50 Read Latency - 10k-II Write Latency - 10k-II 40 Latency (ms) 30 20 10 0 0 500 1000 1500 2000 2500 3000 3500 4000 4500 I/Os per Second Figure 19. Response versus throughput for 10k and 7.2k rpm hard drives (7,200-rpm 9.1-GB versus 10k-II 9.1-GB drives. Cache disabled. 2k I/Os. 100 percent random access: 67 percent reads, 33 percent writes) 160 Throughput (Transactions per Second) 140 120 30-50% Performance Gain 100 80 60 9.1 GB 10k-II 9.1 GB 7,200-rpm 40 12 16 20 24 28 32 Number of Clients Figure 20. Single drive throughput comparison. These results were obtained using ServerBench version 4.02 Copyright 1998 by ZD Inc. All rights reserved. ZD did not independently verify this test and makes no representations or warranties as to the results of the test. Figure 21 shows the expected increase in performance for 10K RPM drives when used in a RAID array. ECG044.0399

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I/O Performance Tuning of Compaq Servers
30
ECG044.0399
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I/Os per Second
Latency (ms)
Read Latency - 7,200-rpm
Write Latency - 7,200-rpm
Read Latency - 10k-II
Write Latency - 10k-II
Figure 19.
Response versus throughput for 10k and 7.2k rpm hard drives (7,200-rpm 9.1-GB versus
10k-II 9.1-GB drives.
Cache disabled.
2k I/Os.
100 percent random access: 67 percent reads, 33
percent writes)
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9.1 GB 10k-II
9.1 GB 7,200-rpm
Throughput (Transactions per Second)
Number of Clients
30-50% Performance
Gain
Figure 20.
Single drive throughput comparison. These results were obtained using ServerBench
version 4.02 Copyright 1998 by ZD Inc. All rights reserved. ZD did not independently verify this test
and makes no representations or warranties as to the results of the test.
Figure 21 shows the expected increase in performance for 10K RPM drives when used in a RAID
array.