![]() It runs on most available operating systems, including Windows and is licensed under the GNU GPL. Squid has extensive access controls and makes a great server accelerator. Squid reduces bandwidth and improves response times by caching and reusing frequently-requested web pages. ![]() Squid is derived from the ARPA-funded Harvest Project. This reduces the amount of time the cache waits for results. When squid starts up, it spawns a configurable number of helper processes, each of which can perform parallel lookups. ![]() Squid consists of a main server program squid, some optional programs for custom processing and authentication, and some management and client tools. By using the lightweight Internet Cache Protocols ICP, HTCP or CARP, Squid caches can be arranged in a hierarchy or mesh for additional bandwidth savings. Squid supports SSL, extensive access controls, and full request logging. ![]() Squid keeps meta data and especially hot objects cached in RAM, caches DNS lookups, supports non-blocking DNS lookups, and implements negative caching of failed requests. Unlike traditional caching software, Squid handles all requests in a single, non-blocking process. Squid is a high-performance proxy caching server for web clients, supporting FTP, gopher, ICAP, ICP, HTCP and HTTP data objects.
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