-----BEGIN PGP SIGNED MESSAGE----- Hi, and apologies for cross-posting :-) This is to announce the availability of both a specification for the new Cache Digest protocol: <URL:http://squid.nlanr.net/Squid/FAQ/FAQ-16.html> and an 'open source' implementation of it written in Perl: <URL:http://wwwcache.ja.net/dev/perlmod/> If you've not come across them before, Cache Digests are a new technique enabling WWW cache servers (and other entities!) to share summaries of the URLs which they know about. This means that servers can be queried for cached URLs without requiring a request/response exchange, as with most current WWW caching protocols such as the Internet Cache Protocol (ICP). The net result is a reduction in network traffic from cache-to-cache peering, and a reduction in latency associated with peerings - since it's no longer necessary to wait for responses from remote servers when processing a request. As well as making it feasible to pool much larger numbers of cache servers than practical using ICP, Cache Digests can also be used to front-end other services such as mirror sites - e.g. by registering in the mirror site's Digest every URL by which each mirrored resources can be found, and sharing the Digest with WWW caches. The original implementation and development work on Cache Digests was done by NLANR, and made available in version 2 of the their open source Squid WWW cache server: <URL:http://squid.nlanr.net/> Sayonara! Martin -----BEGIN PGP SIGNATURE----- Version: 2.6.3i Charset: noconv Comment: Processed by Mailcrypt 3.4, an Emacs/PGP interface iQCVAwUBNqjijtZdpXZXTSjhAQGTkgP+P90fDWlnqM64vdHWxIp+4pm9ewe3Vhuf f//6Ie1YDxBzMVNZu81e2Fg7YV9B3lgIS3SEhXQjoIyMoWkguFI46P4CvPspaCiq 8ds8pxBRr+Qvhh8SJa+uJHW8/bTXcWP8nrDxHJ5akhMoOTOJfZFgNmGGoi3543/k 61+/2jnDWLA= =eBGW -----END PGP SIGNATURE-----
