Return-Path: X-Original-To: apmail-cassandra-user-archive@www.apache.org Delivered-To: apmail-cassandra-user-archive@www.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id B470044F2 for ; Tue, 21 Jun 2011 21:58:02 +0000 (UTC) Received: (qmail 74337 invoked by uid 500); 21 Jun 2011 21:58:00 -0000 Delivered-To: apmail-cassandra-user-archive@cassandra.apache.org Received: (qmail 74308 invoked by uid 500); 21 Jun 2011 21:58:00 -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 74300 invoked by uid 99); 21 Jun 2011 21:58:00 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 21 Jun 2011 21:58:00 +0000 X-ASF-Spam-Status: No, hits=0.7 required=5.0 tests=RCVD_IN_DNSWL_NONE,SPF_NEUTRAL X-Spam-Check-By: apache.org Received-SPF: neutral (nike.apache.org: local policy) Received: from [204.13.248.74] (HELO mho-02-ewr.mailhop.org) (204.13.248.74) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 21 Jun 2011 21:57:51 +0000 Received: from 67-6-215-137.hlrn.qwest.net ([67.6.215.137] helo=[192.168.0.2]) by mho-02-ewr.mailhop.org with esmtpsa (TLSv1:CAMELLIA256-SHA:256) (Exim 4.72) (envelope-from ) id 1QZ8ws-000PJZ-MF for user@cassandra.apache.org; Tue, 21 Jun 2011 21:57:30 +0000 X-Mail-Handler: MailHop Outbound by DynDNS X-Originating-IP: 67.6.215.137 X-Report-Abuse-To: abuse@dyndns.com (see http://www.dyndns.com/services/mailhop/outbound_abuse.html for abuse reporting information) X-MHO-User: U2FsdGVkX1/tpF8a086ybJzrVW5jPbgQJWCiV6vqLSI= Message-ID: <4E0113C7.3040207@dude.podzone.net> Date: Tue, 21 Jun 2011 15:57:27 -0600 From: AJ User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2.17) Gecko/20110414 Lightning/1.0b2 Thunderbird/3.1.10 MIME-Version: 1.0 To: user@cassandra.apache.org Subject: Re: Storing Accounting Data References: <4E00D52A.6040409@dude.podzone.net> <4E01073B.6090200@dude.podzone.net> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Virus-Checked: Checked by ClamAV on apache.org On 6/21/2011 3:14 PM, Anand Somani wrote: > Not sure if it is that simple, a quorum can fail with writes happening > on some nodes (there is no rollback). Also there is no concept of > atomic compare-and-swap. > Good points. I suppose what I need is for the client to implement the part of ACID that C* does not. So, right off the bat, can anyone tell me if that is even possible conceptually? If so, please throw out some terms that I can wiki and some Java API's would be much appreciated as well. Also, can I accomplish this or make things easier by imposing some restrictions, such as only allowing single-user access to the data for certain operations? Thanks!