Return-Path: Delivered-To: apmail-cassandra-user-archive@www.apache.org Received: (qmail 53065 invoked from network); 3 Dec 2010 20:34:25 -0000 Received: from unknown (HELO mail.apache.org) (140.211.11.3) by 140.211.11.9 with SMTP; 3 Dec 2010 20:34:25 -0000 Received: (qmail 73150 invoked by uid 500); 3 Dec 2010 20:34:23 -0000 Delivered-To: apmail-cassandra-user-archive@cassandra.apache.org Received: (qmail 73122 invoked by uid 500); 3 Dec 2010 20:34:23 -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 73113 invoked by uid 99); 3 Dec 2010 20:34:23 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Fri, 03 Dec 2010 20:34:23 +0000 X-ASF-Spam-Status: No, hits=2.2 required=10.0 tests=FREEMAIL_FROM,HTML_MESSAGE,RCVD_IN_DNSWL_NONE,RFC_ABUSE_POST,SPF_PASS,T_TO_NO_BRKTS_FREEMAIL X-Spam-Check-By: apache.org Received-SPF: pass (nike.apache.org: local policy) Received: from [68.142.207.185] (HELO web81906.mail.mud.yahoo.com) (68.142.207.185) by apache.org (qpsmtpd/0.29) with SMTP; Fri, 03 Dec 2010 20:34:15 +0000 Received: (qmail 24740 invoked by uid 60001); 3 Dec 2010 20:33:50 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.com; s=s1024; t=1291408430; bh=NAkAwghIiydPUIfIClwChuPJhUWk7owv/1CPBb5gB9I=; h=Message-ID:X-YMail-OSG:Received:X-Mailer:Date:From:Subject:To:MIME-Version:Content-Type; b=Xdxd9XFdy2qjOj48u6j2uoZUKrTg3fyqGclOygqG78LMx+yfjNW0i3wX6lla/bX2E7AJnjbW1R2Ln4H+3Bcum53PWnnsE2T72xTtF9D5D5ho95x7kTvzSoCBEYRtbaA3pV9YEGOML2xFFPesZhUBb4x7L93GgP7DWVv6QlOruKw= DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=Message-ID:X-YMail-OSG:Received:X-Mailer:Date:From:Subject:To:MIME-Version:Content-Type; b=pNEX9rSjZSv7Yba9fQaRvviQIWM+1GZuT8tTVSVvaxV5eaQHyyY13cjNBIM69kpWECYOmOumdWGKNmTK3VHCQqgwWItJfHd3k8ntXg2B/H5Si6lCLXEqLXoZRbfigiEfZSR1vSxo/hMNUK+T/XwXK9QUJOn2P9Fn1ePeVrJQSkQ=; Message-ID: <637832.23234.qm@web81906.mail.mud.yahoo.com> X-YMail-OSG: .3cVUukVM1nMtbRmW8UxtWZ3kkHCuDu87GgSgmTWIuMsWI9 uBPWRQsTLkhgVaAzBfGdB6j5fTyP503DIZ57QehbXNjsqn3kbarayQeN_sbw kwQ3uk3qSPi.6P3CWBrwbCdahLh_5oGNIInCC6wUB4nLFKvwBBScVHw.twEU 9Z9dwxXKfEwLWjiY1vBIfCHb5XbUc7KvxZyACmX_dR9Lb.2ghlLCZlGL76w0 EXy_aJuaJc8c74d0fi_A2DlwvIYICjToV_Yh2ETcLbhKCxeombCtXEGRbixI 6UhDgSs7ZwE062CtKoUgXOxo8Oet5kkTN4A1.mb5bHnFLM78bjbRK Received: from [65.116.116.6] by web81906.mail.mud.yahoo.com via HTTP; Fri, 03 Dec 2010 12:33:50 PST X-Mailer: YahooMailRC/553 YahooMailWebService/0.8.107.285259 Date: Fri, 3 Dec 2010 12:33:50 -0800 (PST) From: Sanjay Acharya Subject: Cassandra Map-Reduce To: user@cassandra.apache.org MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="0-2053308367-1291408430=:23234" X-Virus-Checked: Checked by ClamAV on apache.org --0-2053308367-1291408430=:23234 Content-Type: text/plain; charset=us-ascii We are in the process of evaluating Cassandra for our needs and we expect to use parallelism for analytics on collected data. The following BLOG mentions that Cassandra's Map-Reduce support does not support multiple column families http://allthingshadoop.com/2010/04/24/running-hadoop-mapreduce-with-cassandra-nosql/ Has the same proven to be a challenge or blockers for those using the Map-Reduce functionality? Please share your experience. Also are there plans to support multiple column family map-reduce functionality? --0-2053308367-1291408430=:23234 Content-Type: text/html; charset=us-ascii

We are in the process of evaluating Cassandra for our needs and we expect to use parallelism for analytics on collected data. The following BLOG mentions that
Cassandra's Map-Reduce support does not support multiple column families http://allthingshadoop.com/2010/04/24/running-hadoop-mapreduce-with-cassandra-nosql/

Has the same proven to be a challenge or blockers for those using the Map-Reduce functionality? Please share your experience. Also are there plans to support multiple column family map-reduce functionality?

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