HP e-Commerce / XML director server appliance sa8250 - Users Guide

C H A P T E R 2 HP e-Commerce/XML Director Server Appliance SA8250 User Guide

Target Response Time Satisfied

For example, the services HTTP and HTTPS are both assigned to a

single policy group. HTTPS is designated the highest priority service,

and HTTP the second priority. The SA8250 monitors the response

time of each service, and if necessary re-prioritizes server resources

of subordinate services to keep the response time for the highest

priority service within the specified range. The figure above shows a

policy group with services sharing a defined VIP, two services, and

their associated target response times. When the average response

time of HTTPS is less than or equal to 10ms, Server 1 fulfills HTTP

requests, Server 2 fulfills HTTPS requests, and Server 3 fulfills both

HTTP and HTTPS requests. The figure on the next page illustrates

server utilization after HTTPS response time exceeds 10 ms.

SA8250

VIP: 10.2.2.4

HTTPS: 10 ms

HTTP: 10 ms

Server 1:

HTTP

Server 2:

HTTPS

Server 3:

HTTP/HTTPS