Compaq 307560-001 Novell GroupWise Performance Management on Compaq Servers - Page 23

Proof Of Concept Of Sizing The Group Wise Server

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ECG007.0897 WHITE PAPER (cont.) 2...3 Fault Tolerance is strongly recommended by Novell and Compaq engineers. RAID 1 is the preferred level of fault tolerance for systems that have mission-critical data, while RAID 5 is recommended for systems storing non-critical data. RAID 1 is the preference due to a combination of high level performance and protection of the data. RAID 1 uses disk mirroring, providing good data protection at the cost of low utilization of actual disk capacity. Disk mirroring uses 50% of available disk space for fault tolerance support. RAID 5 uses distributed data guarding, striping data and parity data across all drives in the array. The more drives in the array, the lower portion of each drive reserved for fault tolerance support. Set the Smart Array Controller read/write ratio to an appropriate level. In our test case, the optimal ratio is 75:25, due to the read-intensive environment. However, because this parameter is very application-specific, users should do their homework before changing it. Using the largest volume block size is recommended. PROOF OF CONCEPT OF SIZING THE GROUPWISE SERVER Preliminary tests show that a ProLiant 800 can successfully sustain 500 users and a ProLiant 5000 can sustain 1000 users. These tests prove that Compaq is a viable solution for GroupWise needs. More detailed information will be forthcoming after extensive testing at Novell's SuperLab facility in Provo, Utah. At the SuperLab, the full Compaq Server product line in multiple configurations will be tested under client loads in excess of 1000 users.

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W
HITE
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APER
(cont.)
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Fault Tolerance is strongly recommended by Novell and Compaq engineers. RAID 1 is the
preferred level of fault tolerance for systems that have mission-critical data, while RAID 5 is
recommended for systems storing non-critical data. RAID 1 is the preference due to a
combination of high level performance and protection of the data. RAID 1 uses disk mirroring,
providing good data protection at the cost of low utilization of actual disk capacity. Disk
mirroring uses 50% of available disk space for fault tolerance support. RAID 5 uses distributed
data guarding, striping data and parity data across all drives in the array. The more drives in the
array, the lower portion of each drive reserved for fault tolerance support. Set the Smart Array
Controller read/write ratio to an appropriate level. In our test case, the optimal ratio is 75:25, due
to the read-intensive environment. However, because this parameter is very application-specific,
users should do their homework before changing it. Using the largest volume block size is
recommended.
P
ROOF OF
C
ONCEPT OF
S
IZING THE
G
ROUP
W
ISE
S
ERVER
Preliminary tests show that a ProLiant 800 can successfully sustain 500 users and a ProLiant
5000 can sustain 1000 users.
These tests prove that Compaq is a viable solution for GroupWise
needs. More detailed information will be forthcoming after extensive testing at Novell's SuperLab
facility in Provo, Utah. At the SuperLab, the full Compaq Server product line in multiple
configurations will be tested under client loads in excess of 1000 users.