Setup and Install

175
Glossary
A
accept thread - A process that
performs classification and access
control on connections from the
listen queue, and then queues
them up for the application as
well as possible further WebQoS
processing.
admission control - A type of
access control that is focused on
protecting the system from
overload. Based on one or more
system load thresholds, it makes
decisions about what type of
requests to admit and which ones
to defer, redirect or reject.
C
class - See Request Classification
Rule.
co-hosting - The sharing of a
server/cluster by several sites
whose contents are typically
owned and supplied by different
companies or business units.
Service isolation features within
the system and the web server
prevent different sites from
interfering with each other.
co-location - The sharing of a
physical premise by
servers/clusters each hosting a
different site, typically owned by
different companies or business
units. The businesses or business
units save money by having one
organization (Information
Technology or a service provider)
manage and maintain the
systems. The machines, however,
are considered to be owned by the
business or business unit.
concurrent sessions - The total
number of sessions that have not
expired (based on the
configuration of the advanced
features under “Session
Timeouts”) and are possibly
active. This number does not
indicate the total number of
sessions currently active on the
system.
corrective action policy - A set
of one or more actions that are
invoked when an SLO is violated.
The set of potential actions are
intended to alleviate the condition
by causing a lower priority SLO to
be violated, or by reducing load on
the system via session deferral or
rejection.
D
differentiated access - Access
based on classification rules.
Requests associated with one
classification rule might be
admitted while those associated
with another are not.
differentiated performance -
Differentiated response time and
throughput achieved via queuing,
process control, and flow control.
Differentiation may be based on
request classifications.