HP ProLiant 4500 Performance Analysis and Capacity Planning for Microsoft Site - Page 20

Capacity Planning Guidelines

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WHITE PAPER (cont.) 2...0 Figure 6: ProLiant 7000 Test Lab Configuration CAPACITY PLANNING GUIDELINES The successful installation of any networked application requires careful planning. To get the most out of these components, the installation must offer sufficient capacity to satisfy the user community. An Excel workbook has been provided in Appendix A of this white paper to help determine how many users each site can support. This workbook helps to determine how many simultaneous users a server can support and what size user community that represents. By doing a "what-if" analysis using this workbook, which Compaq computers, and how many are needed to support the specified number of users with a given response time, can be determined. Key guidelines for implementing ILS that will help to avoid performance bottlenecks are: • You must have enough CPU processing power to handle the expected user transaction rate. Remember that the mix of ILS operations plays a very significant role in determining how many transactions per second a system can process. • You must have enough memory in the system to reduce or eliminate paging. This will let the system handle the number of simultaneously active users expected. Remember that ILS is a memory-resident directory service and does not store its information on disk. • Be sure that the network bandwidth is sufficient to handle the projected transaction rate. If the server will use a 100 Mbit/second network, then bandwidth will not be a bottleneck. However, at least two 10 Mbit/second networks will be needed to handle the maximum transaction rate supported by either a ProLiant 2500 or ProLiant 7000. Disk performance is not a significant factor affecting ILS performance. Key guidelines for implementing PS that will help to avoid performance bottlenecks are: • Use a RAID, either RAID 1 or 5, if the active user community surpasses a few thousand people (PS can be disk intensive). Raid 5 was used in this implementation of ILS and PS. • The higher performance of CPUs will increase the number of users the installation can support, as well as lower the response time each sees.

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W
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Figure 6: ProLiant 7000 Test Lab Configuration
C
APACITY
P
LANNING
G
UIDELINES
The successful installation of any networked application requires careful planning. To get the
most out of these components, the installation must offer sufficient capacity to satisfy the user
community.
An Excel workbook has been provided in Appendix A of this white paper to help determine how
many users each site can support. This workbook helps to determine how many simultaneous
users a server can support and what size user community that represents. By doing a “what-if”
analysis using this workbook, which Compaq computers, and how many are needed to support the
specified number of users with a given response time, can be determined.
Key guidelines for implementing ILS that will help to avoid performance bottlenecks are:
•
You must have enough CPU processing power to handle the expected user transaction rate.
Remember that the mix of ILS operations plays a very significant role in determining how
many transactions per second a system can process.
•
You must have enough memory in the system to reduce or eliminate paging. This will let the
system handle the number of simultaneously active users expected. Remember that ILS is a
memory-resident directory service and does not store its information on disk.
•
Be sure that the network bandwidth is sufficient to handle the projected transaction rate. If
the server will use a 100 Mbit/second network, then bandwidth will not be a bottleneck.
However, at least two 10 Mbit/second networks will be needed to handle the maximum
transaction rate supported by either a ProLiant 2500 or ProLiant 7000.
Disk performance is not a significant factor affecting ILS performance.
Key guidelines for implementing PS that will help to avoid performance bottlenecks are:
•
Use a RAID, either RAID 1 or 5, if the active user community surpasses a few thousand
people (PS can be disk intensive). Raid 5 was used in this implementation of ILS and PS.
•
The higher performance of CPUs will increase the number of users the installation can
support, as well as lower the response time each sees.