HP ProLiant 800 Novell GroupWise Performance Management on Compaq Servers - Page 12

Fault tolerance: RAID 0, RAID 1, RAID 4, RAID 5

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ECG007.0897 WHITE PAPER (cont.) 1...2 Table 1. Memory Recommendation Concurrent users 100 Active users and actual Postoffice; Machine recommended Pentium 90 MHz 100-250 users 250 Active users and actual Post- Pentium 133 MHz office; 250-500 users 500 Active users and actual Post- Pentium-Pro 200 MHz office; 500-1000 users 1000 Active users and actual Post-office; Pentium-Pro 200 MHz 1000-2500 Users Actual Server memory used During peak time. 42MB 104MB 116MB 137MB Disk The disk subsystem has an impact on performance for all applications. The amount of I/O required by your application determines the degree of impact on the disk subsystem performance. Since Novell GroupWise is a very I/O-oriented application, the disk subsystem is an important contributor to overall system performance. Determining the impact of the disk subsystem involved analyzing the following options • Drive Spindles/Striping • Hardware Striping versus Software Striping • Fault tolerance: RAID 0, RAID 1, RAID 4, RAID 5 • Controller type Volume Block Size The INSTALL program will set the default volume block size based on the size of Disk Volume. Depending on the type of files stored on the volume, or the application you used, you can increase or decrease the volume block size to improve the performance. The Novell/Compaq test team found that setting the volume block size to 64 KB yields the best result. The following graph shows the performance comparison.

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Table 1
. Memory Recommendation
Concurrent users
Machine
recommended
Actual Server memory used
During peak time.
100 Active users and actual Post-
office;
100-250 users
Pentium 90 MHz
42MB
250 Active users and actual Post-
office;
250-500 users
Pentium 133 MHz
104MB
500 Active users and actual Post-
office;
500-1000 users
Pentium-Pro 200 MHz
116MB
1000 Active users and actual
Post-office;
1000-2500 Users
Pentium-Pro 200 MHz
137MB
Disk
The disk subsystem has an impact on performance for all applications. The amount of I/O
required by your application determines the degree of impact on the disk subsystem performance.
Since Novell GroupWise is a very I/O-oriented application, the disk subsystem is an important
contributor to overall system performance. Determining the impact of the disk subsystem involved
analyzing the following options
•
Drive Spindles/Striping
•
Hardware Striping versus Software Striping
•
Fault tolerance: RAID 0, RAID 1, RAID 4, RAID 5
•
Controller type
Volume Block Size
The INSTALL program will set the default volume block size based on the size of Disk Volume.
Depending on the type of files stored on the volume, or the application you used, you can increase
or decrease the volume block size to improve the performance. The Novell/Compaq test team
found that setting the volume block size to 64 KB yields the best result. The following graph
shows the performance comparison.