HP ProLiant 4500 Disk Subsystem Performance and Scalability - Page 3

Table 1, Disk Subsystem Testing Environment

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ECG025.0997 WHITE PAPER (cont.) ... DISK SUBSYSTEM OVERVIEW Key components of the disk subsystem can play a major part of overall system performance. Identifying potential bottlenecks within your disk subsystem is crucial. In this white paper we identify and discuss in detail disk-related performance characteristics that can help you understand how latency, average seek time, transfer rates and file system or disk controller caching can affect your disk subsystem performance. Once we discuss all of the disk measurement terms, we use those definitions to address performance issues in each scalability section of this document. The different scalability sections discussed are as follows: • Like Drive (similar hard drive scalability) • Like Capacity (similar drive capacity scalability) • Disk Controller (multiple controller scalability) This document provides disk subsystem recommendations, based on testing in the Integration Test Lab of hardware and software products from Compaq and other vendors. The test environment that Compaq selected might not be the same as your environment. Because each environment has different and unique characteristics, our results might be different than the results you obtain in your test environment. Test Environment The following table describes the test environment used for the disk subsystem performance testing. This table displays both the one and two controller test configurations that were used in the Compaq ProLiant 5000 during testing. Table 1: Disk Subsystem Testing Environment Environment Equipment Used Server Hardware Platform Compaq ProLiant 5000 Memory 128 MB Processors (4) P6/200 MHz 512k secondary cache Network Interface Controllers (2) Dual 10/100TX PCI UTP Controller (4 network segments) Disk Controllers (1 or 2) SMART-2/P Controllers Disk Drives 2, 4, or 9 GB Fast-Wide SCSI-2 drives Number of Drives up to fourteen 2.1, 4.3, or 9.1 GB Fast-Wide SCSI-2 drives Boot Device (1) Fast-Wide SCSI-2 drive off the Embedded C875 controller 3

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W
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APER
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D
ISK
S
UBSYSTEM
O
VERVIEW
Key components of the disk subsystem can play a major part of overall system
performance.
Identifying potential bottlenecks within your disk subsystem is crucial.
In
this white paper we identify and discuss in detail disk-related performance characteristics
that can help you understand how latency, average seek time, transfer rates and file
system or disk controller caching can affect your disk subsystem performance.
Once we
discuss all of the disk measurement terms, we use those definitions to address
performance issues in each scalability section of this document.
The different scalability
sections discussed are as follows:
•
Like Drive (similar hard drive scalability)
•
Like Capacity (similar drive capacity scalability)
•
Disk Controller (multiple controller scalability)
This document provides disk subsystem recommendations, based on testing in the
Integration Test Lab of hardware and software products from Compaq and other vendors.
The test environment that Compaq selected might not be the same as your environment.
Because each environment has different and unique characteristics, our results might be
different than the results you obtain in your test environment.
Test Environment
The following table describes the test environment used for the disk subsystem
performance testing.
This table displays both the one and two controller test
configurations that were used in the Compaq ProLiant 5000 during testing.
Table 1:
Disk Subsystem Testing Environment
Environment
Equipment Used
Server Hardware Platform
Compaq ProLiant 5000
Memory
128 MB
Processors
(4) P6/200 MHz 512k secondary cache
Network Interface Controllers
(2) Dual 10/100TX PCI UTP Controller (4 network segments)
Disk Controllers
(1 or 2) SMART-2/P Controllers
Disk Drives
2, 4, or 9 GB Fast-Wide SCSI-2 drives
Number of Drives
up to fourteen 2.1, 4.3, or 9.1 GB Fast-Wide SCSI-2 drives
Boot Device
(1) Fast-Wide SCSI-2 drive off the Embedded C875 controller