Compaq 108164-003 - ProLiant - 800 Technical Manual page 31

I/O Performance Tuning of Compaq Servers
Figure 21. Relative performance of a 7-disk, RAID 5 array of 10k rpm drives and a 7-disk, RAID 5
array of 7.2k rpm drives under Windows NT. These results were obtained using NetBench version
5.01. Copyright 1997 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.
Like Drive Scaling
As is the case with most systems, adding additional devices can increase the performance of that
system. By distributing the load, as shown in the following figures, drive throughput can be
increased. With Like Drive Scaling your drive system maintains higher performance over a wider
number of clients.
20,000,000.00
18,000,000.00
16,000,000.00
14,000,000.00
12,000,000.00
10,000,000.00
8,000,000.00
6,000,000.00
4,000,000.00
2,000,000.00
Figure 22. Like-drive scaling performance comparison in a RAID 0 environment. These results were
obtained using NetBench version 5.01. Copyright 1997 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.
ECG044.0399
600
500
400
300
200
100
0
1 2 4 6 8 12
Server Configuration:
128MB RAM
Like Drive Scaling (RAID 0 - 1 Controller)
-
4 8 16 20
16 20 24 28 32 36 40
Number of Clients
25%
96%
57%
24 28 32 36 40
Number of Clients
7 x 9.1 GB 7,200-rpm RAID 5
7 x 9.1 GB 10k-II RAID 5
44 48 52 56 60
12 x 2GB
8 x 2GB
4 x 2GB
44 48 52 56
31
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