Compaq ProLiant 1000 I/O Performance Tuning of Compaq Servers - Page 35

RAID Level Performance

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I/O Performance Tuning of Compaq Servers 35 RAID Level Performance The following 3 figures show relative performance of the various RAID levels for the SMART2DH controller for common applications. Figure 32 shows a comparison of the maximum sustained throughput for RAID 0, 1, and 5. Using these graphs you can better determine which balance of fault tolerance and speed are best for your environment. 1000 900 800 700 600 500 400 300 200 100 0 Compaq Smart-2DH SCSI Controller Simulated Application: OLTP (2 KB, 67% Read, 33% Write, 0% Sequential, 100% Random) RAID 0 RAID 1 RAID 5 RAID Level RAID 5 No Cache Figure 29. Relative performance of RAID levels in an online transaction processing application. These results were obtained using Iometer version 1998.10.08, Copyright 1998 by Intel Corporation. Intel does not endorse any Iometer results. Compaq Smart-2DH SCSI Controller Simulated Application: Web Server (8 KB, 100% Read, 0% Write, 0% Sequential, 100% Random) 900 800 700 600 500 400 300 200 100 0 RAID 0 RAID 1 RAID 5 RAID Level RAID 5 No Cache Figure 30. Relative performance of RAID levels in a web server application. These results were obtained using Iometer version 1998.10.08, Copyright 1998 by Intel Corporation. Intel does not endorse any Iometer results. ECG044.0399

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I/O Performance Tuning of Compaq Servers
35
ECG044.0399
RAID Level Performance
The following 3 figures show relative performance of the various RAID levels for the SMART-
2DH controller for common applications. Figure 32 shows a comparison of the maximum
sustained throughput for RAID 0, 1, and 5. Using these graphs you can better determine which
balance of fault tolerance and speed are best for your environment.
Compaq Smart-2DH SCSI Controller
Simulated Application:
OLTP
(2 KB, 67% Read, 33% Write, 0% Sequential, 100% Random)
0
100
200
300
400
500
600
700
800
900
1000
RAID 0
RAID 1
RAID 5
RAID 5 No
Cache
RAID Level
Figure 29.
Relative performance of RAID levels in an online transaction processing application.
These results were obtained using Iometer version 1998.10.08, Copyright 1998
by Intel Corporation.
Intel does not endorse any Iometer results.
Compaq Smart-2DH SCSI Controller
Simulated Application:
Web Server
(8 KB, 100% Read, 0% Write, 0% Sequential, 100% Random)
0
100
200
300
400
500
600
700
800
900
RAID 0
RAID 1
RAID 5
RAID 5 No
Cache
RAID Level
Figure 30.
Relative performance of RAID levels in a web server application. These results were
obtained using Iometer version 1998.10.08, Copyright 1998
by Intel Corporation. Intel does not
endorse any Iometer results.