HP Traffic Director sa7220 - Manual (Page 17)

C H A P T E R 1 Benefits
5
Intelligent content
routing for SSL
transactions
(SA8200/SA8220 only) The SA8220 incorporates intelligent traffic management for secure
transactions, dramatically improving an e-Commerce site’s
responsiveness, reliability, and QoS. While typical traffic
management devices make decisions based only on information at
Layer 4 in the network stack, the SA8220 combines Layer 4
through 7 (application/content) awareness to speed up response
times and eliminate error messages for secure transactions. It
keeps e-Commerce sites open for business, even during back-end
transaction problems or content glitches.
Intelligent session
recovery for
transactions
(all models except the
SA7200) The SA8220 provides Intelligent Session Recovery technology for
transactions. By monitoring content within the response sent back
by the server, Intelligent Session Recovery detects HTTP 400,
500, or 600 series errors, transparently rolls back the session, and
redirects the transaction to another server until the request is
fulfilled.
Response-time base
prioritized service for
secure transactions The SA8220 enables system administrators to implement varying
classes of service, assign priority levels, and set target response
times for secure transactions. The SA8220 continually measures
the response times of each class of service group and assigns
incoming requests to the server that can fulfill those requests
within the predefined response time. If the response time exceeds
the predefined threshold, requests designated as high priority
receive preference over those of lower priority. The SA8220
allows you to offer predictable performance for high-priority
secure requests.
Benefit Description