Return-Path: Delivered-To: apmail-cassandra-user-archive@www.apache.org Received: (qmail 80547 invoked from network); 21 Oct 2010 02:43:53 -0000 Received: from unknown (HELO mail.apache.org) (140.211.11.3) by 140.211.11.9 with SMTP; 21 Oct 2010 02:43:53 -0000 Received: (qmail 88293 invoked by uid 500); 21 Oct 2010 02:43:51 -0000 Delivered-To: apmail-cassandra-user-archive@cassandra.apache.org Received: (qmail 88155 invoked by uid 500); 21 Oct 2010 02:43:51 -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 88147 invoked by uid 99); 21 Oct 2010 02:43:51 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 21 Oct 2010 02:43:51 +0000 X-ASF-Spam-Status: No, hits=0.0 required=10.0 tests=FREEMAIL_FROM,SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (athena.apache.org: domain of jbellis@gmail.com designates 209.85.215.172 as permitted sender) Received: from [209.85.215.172] (HELO mail-ey0-f172.google.com) (209.85.215.172) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 21 Oct 2010 02:43:46 +0000 Received: by eyf6 with SMTP id 6so1155826eyf.31 for ; Wed, 20 Oct 2010 19:43:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:received:in-reply-to :references:date:message-id:subject:from:to:content-type :content-transfer-encoding; bh=V5F/KS7Ed4JtuI0wU/k3eDyz/quWxyq2qiASG5W1vRE=; b=HwKToxdsMY0ZAR4FoBpClQiTQTPczkXroanj3fdEfw+hA3nKYRBcCZgXVQDlNZQmKt DJpCDTH7hY80MDex9x5fjgr45qGpQjWNs16MCpiMySrKOP5qqTHrBaoDqbgp9eruJr50 WYjgu5V56pLvqeafaJYn+2dVCotMk/7iiEFac= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type:content-transfer-encoding; b=mZVj7U1o5/7ZoAyCeFnXF5bvcsEE3qX4vd01swgYY09oud7WX8Eppot7ojOBp8m96K TMLc7wgIhx+KYF582iygn/P1mHbmG9eYfw0g30XuvLRziOm6kkIknlAMn+rDdmCmYgyL Uy6pV3t0oRiF1QQo5NJi7ISgPECRn35NvLPnI= MIME-Version: 1.0 Received: by 10.213.114.8 with SMTP id c8mr4027753ebq.67.1287629004036; Wed, 20 Oct 2010 19:43:24 -0700 (PDT) Received: by 10.14.53.7 with HTTP; Wed, 20 Oct 2010 19:43:24 -0700 (PDT) In-Reply-To: <4CBF99A8.7060304@dawningstreams.com> References: <4CBF99A8.7060304@dawningstreams.com> Date: Wed, 20 Oct 2010 21:43:24 -0500 Message-ID: Subject: Re: What happens if there is a collision? From: Jonathan Ellis To: user Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable On Wed, Oct 20, 2010 at 8:38 PM, J=E9r=F4me Verstrynge = wrote: > -) Let's imagine node A updates MyColumn with value 'AAA' and timestamp > 3567890 > -) Let's imagine node E updates MyColumn with value 'EEE' and timestamp > 3567890 > > What happens? Who wins? Is it deterministic? value breaks ties if timestamps are identical, so AAA would win. > Let's imagine node A performs 3 writes before node E, is any node notifie= d > of the collision? I don't understand the question. --=20 Jonathan Ellis Project Chair, Apache Cassandra co-founder of Riptano, the source for professional Cassandra support http://riptano.com