Return-Path: Delivered-To: apmail-cassandra-user-archive@www.apache.org Received: (qmail 76140 invoked from network); 9 Feb 2011 10:35:23 -0000 Received: from hermes.apache.org (HELO mail.apache.org) (140.211.11.3) by minotaur.apache.org with SMTP; 9 Feb 2011 10:35:23 -0000 Received: (qmail 39860 invoked by uid 500); 9 Feb 2011 10:35:21 -0000 Delivered-To: apmail-cassandra-user-archive@cassandra.apache.org Received: (qmail 39581 invoked by uid 500); 9 Feb 2011 10:35:17 -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 39567 invoked by uid 99); 9 Feb 2011 10:35:16 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 09 Feb 2011 10:35:16 +0000 X-ASF-Spam-Status: No, hits=-0.0 required=5.0 tests=SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (nike.apache.org: local policy) Received: from [150.140.141.169] (HELO poseidon.ceid.upatras.gr) (150.140.141.169) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 09 Feb 2011 10:35:07 +0000 Received: from mail.ceid.upatras.gr (unknown [10.1.0.143]) by poseidon.ceid.upatras.gr (Postfix) with ESMTP id 8A991EB47BF for ; Wed, 9 Feb 2011 12:34:44 +0200 (EET) Received: from localhost (europa.ceid.upatras.gr [127.0.0.1]) by mail.ceid.upatras.gr (Postfix) with ESMTP id 70387160DB7 for ; Wed, 9 Feb 2011 12:34:44 +0200 (EET) X-Virus-Scanned: amavisd-new at ceid.upatras.gr Received: from mail.ceid.upatras.gr ([127.0.0.1]) by localhost (europa.ceid.upatras.gr [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id OdthzsY9DlYn for ; Wed, 9 Feb 2011 12:34:44 +0200 (EET) Received: by mail.ceid.upatras.gr (Postfix, from userid 48) id 4F295160DA6; Wed, 9 Feb 2011 12:34:44 +0200 (EET) Received: from 150.140.193.14 by webmail.ceid.upatras.gr with HTTP; Wed, 9 Feb 2011 12:34:44 +0200 (EET) Message-ID: <59638.150.140.193.14.1297247684.squirrel@webmail.ceid.upatras.gr> In-Reply-To: <77AEE8AD-031C-4648-A9BE-3912A5566C77@toptarif.de> References: <77AEE8AD-031C-4648-A9BE-3912A5566C77@toptarif.de> Date: Wed, 9 Feb 2011 12:34:44 +0200 (EET) Subject: Re: How do secondary indices work From: altanis@ceid.upatras.gr To: user@cassandra.apache.org User-Agent: SquirrelMail/1.4.8-5.el5_3.7 MIME-Version: 1.0 Content-Type: text/plain;charset=utf-8 Content-Transfer-Encoding: 8bit X-Priority: 3 (Normal) Importance: Normal X-Virus-Checked: Checked by ClamAV on apache.org Thank you for the reply, although I didn't quite understand you. All I got was that Index data is stored in some kind of external data structure. Alexander > > On Feb 8, 2011, at 21:23, Aaron Morton wrote: > >>>> 1) Is data stored in some external data structure, or is it stored in >>>> an >>>> actual Cassandra table, as columns within column families? > > Yes. Own files next to the CF files and own node IndexColumnFamilies in > JMX. > > And they are built asynchronously. > >