The Cache Array Routing Protocol (CARP) is used in load-balancing HTTP requests across multiple proxy cache servers. It works by generating a hash for each URL requested. A different hash is generated for each URL and by splitting the hash namespace into equal (or unequal parts, if uneven load is intended) the overall number of requests can be distributed to multiple servers.

Implementations include Microsoft Internet Security and Acceleration Server

Microsoft Internet Security and Acceleration Server

Microsoft Forefront Threat Management Gateway , formerly known as Microsoft Internet Security and Acceleration Server , is a network security and protection solution for Microsoft Windows, described by Microsoft as "enables businesses by allowing employees to safely and productively use the...

 and the Squid (software).

External links

• The Cache Array Routing Protocol v1.0 draft