From fork-admin@xent.com Wed Sep 11 19:42:11 2002 Return-Path: Delivered-To: yyyy@localhost.example.com Received: from localhost (jalapeno [127.0.0.1]) by jmason.org (Postfix) with ESMTP id 18FA416F03 for ; Wed, 11 Sep 2002 19:42:11 +0100 (IST) Received: from jalapeno [127.0.0.1] by localhost with IMAP (fetchmail-5.9.0) for jm@localhost (single-drop); Wed, 11 Sep 2002 19:42:11 +0100 (IST) Received: from xent.com ([64.161.22.236]) by dogma.slashnull.org (8.11.6/8.11.6) with ESMTP id g8BFdKC21045 for ; Wed, 11 Sep 2002 16:39:21 +0100 Received: from lair.xent.com (localhost [127.0.0.1]) by xent.com (Postfix) with ESMTP id 0B0F32940FB; Wed, 11 Sep 2002 08:36:05 -0700 (PDT) Delivered-To: fork@example.com Received: from cats.ucsc.edu (cats-mx1.ucsc.edu [128.114.129.36]) by xent.com (Postfix) with ESMTP id 74A3F29409A for ; Wed, 11 Sep 2002 08:35:34 -0700 (PDT) Received: from Tycho (dhcp-63-177.cse.ucsc.edu [128.114.63.177]) by cats.ucsc.edu (8.10.1/8.10.1) with SMTP id g8BFbsq13928 for ; Wed, 11 Sep 2002 08:37:54 -0700 (PDT) From: "Jim Whitehead" To: Subject: RE: Microsoft buys XDegress - more of a p2p/distributed data thing... Message-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-Msmail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2911.0) In-Reply-To: <029801c25960$db348560$640a000a@golden> X-Mimeole: Produced By Microsoft MimeOLE V5.50.4133.2400 Importance: Normal X-Ucsc-Cats-Mailscanner: Found to be clean Sender: fork-admin@xent.com Errors-To: fork-admin@xent.com X-Beenthere: fork@example.com X-Mailman-Version: 2.0.11 Precedence: bulk List-Help: List-Post: List-Subscribe: , List-Id: Friends of Rohit Khare List-Unsubscribe: , List-Archive: Date: Wed, 11 Sep 2002 08:35:31 -0700 X-Spam-Status: No, hits=-6.2 required=7.0 tests=AWL,IN_REP_TO,KNOWN_MAILING_LIST,QUOTED_EMAIL_TEXT, SPAM_PHRASE_00_01,USER_AGENT_OUTLOOK version=2.50-cvs X-Spam-Level: XDegrees was at the WebDAV Interoperability Testing Event last year, so there may be some DAV under the hood there someplace. - Jim > -----Original Message----- > From: fork-admin@xent.com [mailto:fork-admin@xent.com]On Behalf Of > Gordon Mohr > Sent: Wednesday, September 11, 2002 12:00 AM > To: fork@example.com > Subject: Re: Microsoft buys XDegress - more of a p2p/distributed data > thing... > > > Mr. FoRK writes: > > "Files can be cached on multiple systems randomly scattered around the > > Internet, as with Napster or Freenet. In fact, the caching in > XDegrees is > > more sophisticated than it is on those systems: users with high > bandwidth > > connections can download portions, or "stripes," of a file from several > > cached locations simultaneously. The XDegrees software then reassembles > > these stripes into the whole file and uses digital signatures > to verify that > > the downloaded file is the same as the original. A key component of this > > digital signature is a digest of the file, which is stored as > an HTTP header > > for the file." > > This "more sophisticated than [Napster or Freenet]" part seems > to be the same behavior implemented in many other P2P CDNs, > such as: > > - Kazaa > - EDonkey/Overnet > - BitTorrent > - Gnutella (with HUGE extensions) > - OnionNetworks WebRAID > > ...though the quality of the "digest" used by each system varies > wildly. > > - Gordon >