Compaq ProLiant 1000 I/O Performance Tuning of Compaq Servers - Page 31

I/O Performance Tuning of Compaq Servers 31 Throughput (transactions per second) 600 7 x 9.1 GB 7,200-rpm RAID 5 500 7 x 9.1 GB 10k-II RAID 5 400 300 200 100 0 1 2 4 6 8 12 16 20 24 28 32 36 40 44 48 52 56 60 Server Configuration: Number of Clients 128MB RAM 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 Like Drive Scaling (RAID 0 - 1 Controller) 25% 12 x 2GB 8 x 2GB 4 x 2GB 12,000,000.00 10,000,000.00 57% 96% 8,000,000.00 6,000,000.00 4,000,000.00 2,000,000.00 4 8 16 20 24 28 32 36 40 44 48 52 56 57 Number of Clients 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