Return-Path: Delivered-To: apmail-incubator-cassandra-user-archive@minotaur.apache.org Received: (qmail 94191 invoked from network); 27 Oct 2009 23:46:28 -0000 Received: from hermes.apache.org (HELO mail.apache.org) (140.211.11.3) by minotaur.apache.org with SMTP; 27 Oct 2009 23:46:28 -0000 Received: (qmail 1304 invoked by uid 500); 27 Oct 2009 20:59:46 -0000 Delivered-To: apmail-incubator-cassandra-user-archive@incubator.apache.org Received: (qmail 1287 invoked by uid 500); 27 Oct 2009 20:59:46 -0000 Mailing-List: contact cassandra-user-help@incubator.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: cassandra-user@incubator.apache.org Delivered-To: mailing list cassandra-user@incubator.apache.org Received: (qmail 1278 invoked by uid 99); 27 Oct 2009 20:59:45 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 27 Oct 2009 20:59:45 +0000 X-ASF-Spam-Status: No, hits=2.2 required=10.0 tests=HTML_MESSAGE,SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (nike.apache.org: domain of markxr@gmail.com designates 209.85.218.210 as permitted sender) Received: from [209.85.218.210] (HELO mail-bw0-f210.google.com) (209.85.218.210) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 27 Oct 2009 20:59:38 +0000 Received: by bwz2 with SMTP id 2so189897bwz.20 for ; Tue, 27 Oct 2009 13:59:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:message-id:subject:from:to:content-type; bh=tdmMZKlU0b7TAMLaUrY9+d9UTEza8sOCahHhWfCEiJg=; b=fK+zIuruuTzXwjOzmzvEPBFh7Jrqi/Dcc3vuGMaywL2lRaGCz8zsFPRMrdLf0h9hjf MTHQtBSbaV62+JRn024VJ2rhvEmETwxMhQztIZcyjuxJcyiNdFG/EIRc3w5IF1JMUqFN jNdXm9L63Q5MAjkinOHz/gyvCMkpRpkfqnAv0= 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; b=VtlqbyoPs4wBMGB134++X2KxTCR04JHLX4Tc7hbuIURrx5Y/4v+70t+yZVGb38WHwl gmJIriJLVlCJLXu4clWYXLNgl17FYmXvYW4kL9QYxLvjANgsc+xo7O/GOAhHCpizLLAA Zh0IVh4oj0WEVzkULTwSyR154i+U6GI43N5wM= MIME-Version: 1.0 Received: by 10.204.49.68 with SMTP id u4mr2477717bkf.42.1256677157686; Tue, 27 Oct 2009 13:59:17 -0700 (PDT) In-Reply-To: References: Date: Tue, 27 Oct 2009 20:59:17 +0000 Message-ID: Subject: Re: Questions About Cassandra From: Mark Robson To: cassandra-user@incubator.apache.org Content-Type: multipart/alternative; boundary=00032555acde94cf270476f0f326 X-Virus-Checked: Checked by ClamAV on apache.org --00032555acde94cf270476f0f326 Content-Type: text/plain; charset=ISO-8859-1 2009/10/27 Jonathan Ellis > > > We're adding support for deleting ranges of data (similar to the range > granularity you can get with get_slice), including across multiple > rows, in https://issues.apache.org/jira/browse/CASSANDRA-336, but you > can already delete row-at-a-time by specifying only the CF granularity > to remove. > > That is excellent news; people wanting to use Cassandra for audit data need a way to bulk-expire data efficiently. I assume that when doing a range delete, the range is efficiently communicated to all the nodes which contain part of it and they delete their own bits (which would make sense). Mark --00032555acde94cf270476f0f326 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
2009/10/27 Jonathan Ellis <= jbellis@gmail.com>
We're adding support for deleting ranges of data (similar to the range<= br> granularity you can get with get_slice), including across multiple
rows, in https://issues.apache.org/jira/browse/CASSANDRA-336, bu= t you
can already delete row-at-a-time by specifying only the CF granularity
to remove.


=A0
That is excellent news; people wan= ting to use Cassandra for audit data need a way to bulk-expire data efficie= ntly.

I assume that when doing a range delete, the range is efficien= tly communicated to all the nodes which contain part of it and they delete = their own bits (which would make sense).

Mark
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