Depending on the level of usage that the
proxy server will see, this could end up being a cache drive of 10??“50GB.
A good rule of thumb would be to configure an ISA server with an OS partition of 10GB or
so, a dedicated log drive of 10??“30GB, and a cache drive of 10??“50GB, if space allows. These
are not hard and fast rules, but it is important to allow for the most ideal configuration
for ISA caching.
Deploying Caching Redundancy with the Cache Array Routing
Protocol (CARP)
For large environments, it may become necessary to deploy more than one caching server
to provide for redundancy and load balancing of web caching. The Enterprise version of
ISA Server 2006 allows for the creation of arrays of ISA servers that utilize the Network
Load Balancing (NLB) protocol to provide for failover and load-sharing capabilities. In
addition, Enterprise ISA servers support the Cache Array Routing Protocol (CARP), which
provides for intelligent redirection of clients to individual ISA array members, based on
the presence of cached data on those servers. This helps to further extend the caching
capabilities of ISA Server 2006.
For more information on configuring ISA Server 2006 Enterprise Edition, see Chapter 6,
???Deploying ISA Server Arrays with ISA Server 2006 Enterprise Edition.
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