Return-Path: Delivered-To: apmail-cassandra-user-archive@www.apache.org Received: (qmail 75507 invoked from network); 24 Apr 2010 17:30:54 -0000 Received: from unknown (HELO mail.apache.org) (140.211.11.3) by 140.211.11.9 with SMTP; 24 Apr 2010 17:30:54 -0000 Received: (qmail 92173 invoked by uid 500); 24 Apr 2010 17:30:53 -0000 Delivered-To: apmail-cassandra-user-archive@cassandra.apache.org Received: (qmail 92146 invoked by uid 500); 24 Apr 2010 17:30:53 -0000 Mailing-List: contact user-help@cassandra.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: user@cassandra.apache.org Delivered-To: mailing list user@cassandra.apache.org Received: (qmail 92138 invoked by uid 99); 24 Apr 2010 17:30:53 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Sat, 24 Apr 2010 17:30:53 +0000 X-ASF-Spam-Status: No, hits=0.2 required=10.0 tests=AWL,RCVD_IN_DNSWL_NONE,SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (athena.apache.org: domain of benoit@noisette.ch designates 74.125.82.172 as permitted sender) Received: from [74.125.82.172] (HELO mail-wy0-f172.google.com) (74.125.82.172) by apache.org (qpsmtpd/0.29) with ESMTP; Sat, 24 Apr 2010 17:30:49 +0000 Received: by wyb35 with SMTP id 35so1981216wyb.31 for ; Sat, 24 Apr 2010 10:30:24 -0700 (PDT) MIME-Version: 1.0 Received: by 10.216.86.145 with SMTP id w17mr2140053wee.216.1272130224417; Sat, 24 Apr 2010 10:30:24 -0700 (PDT) Received: by 10.216.48.79 with HTTP; Sat, 24 Apr 2010 10:30:24 -0700 (PDT) In-Reply-To: References: Date: Sat, 24 Apr 2010 19:30:24 +0200 Message-ID: Subject: Re: Does anybody work about transaction on cassandra ? From: Benoit Perroud To: user@cassandra.apache.org Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable "orthogonal" means "go to the opposite direction, but without going back". Including "transaction" in Cassandra needs to turn 90 degrees the design of Cassandra. Kind regards, Benoit. 2010/4/24 dir dir : >>Transactions are orthogonal to the design of Cassandra > > Sorry, Would you want to tell me what is an orthogonal mean in this > context?? > honestly I do not understand what is it. > > Thank you. > > > On Thu, Apr 22, 2010 at 9:14 PM, Miguel Verde > wrote: >> >> No, as far as I know no one is working on transaction support in >> Cassandra.=C2=A0 Transactions are orthogonal to the design of Cassandra[= 1][2], >> although a system could be designed incorporating Cassandra and other >> elements a la Google's MegaStore[3] to support transactions.=C2=A0 Googl= e uses >> Paxos, one might be able to use Zookeeper[4] to design such a system, bu= t it >> would be a daunting task. >> >> [1] http://www.julianbrowne.com/article/viewer/brewers-cap-theorem >> [2] http://www.allthingsdistributed.com/2008/12/eventually_consistent.ht= ml >> [3] http://perspectives.mvdirona.com/2008/07/10/GoogleMegastore.aspx >> [4] http://hadoop.apache.org/zookeeper/ >> >> On Thu, Apr 22, 2010 at 2:56 AM, Jeff Zhang wrote: >>> >>> Hi all, >>> >>> I need transaction support on cassandra, so wondering is anybody work o= n >>> it ? >>> >>> >>> -- >>> Best Regards >>> >>> Jeff Zhang >> > >