Sun Microsystems Portal Server 6 2005Q1, Руководство по планированию

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SRA Sizing
Chapter 4 Pre-Deployment Considerations 73
Identifying Gateway Key Performance
Requirements
Key performance factors are metrics that your technical representative uses as
input to an automated sizing tool. The sizing tool calculates the estimated number
of Gateway instances your SRA deployment requires.
Identifying these key performance factors and giving them to your technical
representative is the first step in formulating your baseline sizing figure.
These are the key performance factors:
• Session Characteristics
• Netlet Usage Characteristics
Session Characteristics
The session characteristics of the Gateway include:
• Total number of SRA (Gateway) users
This represents the size of your user base or pool of potential users for the
secure portal. See
“Concurrent Sessions” on page 139 for more information on
estimating this number.
• Expected percentage of total users using the Gateway (at maximum load)
Apply a percentage to your total number of users to determine this figure.
• Average time between page hits
This is how often on average a user requests a page from the portal server.
NOTE Properly sizing the Gateway is difficult, and using the Gateway
sizing tool is only the beginning. Gateway performance depends
more on throughput then on the number of users, active users, or
user sessions. Any sizing information for the Gateway has to be
based on a set of assumptions. See
“Secure Remote Access Example”
on page 152 fore more information.
NOTE After you calculate these key performance factors, give the figures to
your technical representative. Ask that the Gateway sizing tool be
run to identify the estimated number of Gateway instances.