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 EEA2763D4 for ; Thu, 9 Jun 2011 15:59:59 +0000 (UTC) Received: (qmail 45977 invoked by uid 500); 9 Jun 2011 15:59:57 -0000 Delivered-To: apmail-cassandra-user-archive@cassandra.apache.org Received: (qmail 45945 invoked by uid 500); 9 Jun 2011 15:59:57 -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 45937 invoked by uid 99); 9 Jun 2011 15:59:57 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 09 Jun 2011 15:59:57 +0000 X-ASF-Spam-Status: No, hits=1.5 required=5.0 tests=FREEMAIL_ENVFROM_END_DIGIT,FREEMAIL_FROM,RCVD_IN_DNSWL_LOW,RFC_ABUSE_POST,SPF_PASS,T_TO_NO_BRKTS_FREEMAIL X-Spam-Check-By: apache.org Received-SPF: pass (athena.apache.org: domain of jeremy.hanna1234@gmail.com designates 209.85.213.44 as permitted sender) Received: from [209.85.213.44] (HELO mail-yw0-f44.google.com) (209.85.213.44) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 09 Jun 2011 15:59:52 +0000 Received: by ywp31 with SMTP id 31so1206541ywp.31 for ; Thu, 09 Jun 2011 08:59:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:content-type:mime-version:subject:from :in-reply-to:date:content-transfer-encoding:message-id:references:to :x-mailer; bh=v2AWLiXgoINQlhFfhGCXc6wm+o2roJvyHtb2ygKbY/Q=; b=Dv4JS33ioGVmAIR0QhMXffebjK6w7upxbW7pbEVVG7rSIZMoW7MjgKMFN+rcLKQrTF rgGmwrM/DkGinHNCdsnWDft59uzOAtnFuUSIFrI/j01KHMbWZPn4PozOsKyZV9P5KU+h H51ImVCuBiZzQ+BSPxgSR7eNrN05B3zWdoSzM= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=content-type:mime-version:subject:from:in-reply-to:date :content-transfer-encoding:message-id:references:to:x-mailer; b=oDSL3ouIdd8wtFBtUBMJQ1ECVrivfAknoavIH7ElOMUCNJUZQuMpmccXpbtXX472ta 2SarK44nsvBvrz7tp8x3z2G5grZUbEaYtpXiu7MTVlduzTyid7qXqj0ySrXnb8FOKpnb LxggaL8ewNwN4IV7ABoNtq55JaPevSR3jitQo= Received: by 10.236.192.230 with SMTP id i66mr1260827yhn.482.1307635171160; Thu, 09 Jun 2011 08:59:31 -0700 (PDT) Received: from [192.168.1.108] (108-90-0-32.lightspeed.austtx.sbcglobal.net [108.90.0.32]) by mx.google.com with ESMTPS id o47sm912005yhn.30.2011.06.09.08.59.29 (version=TLSv1/SSLv3 cipher=OTHER); Thu, 09 Jun 2011 08:59:30 -0700 (PDT) Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Apple Message framework v1084) Subject: Re: Purge Data From: Jeremy Hanna In-Reply-To: Date: Thu, 9 Jun 2011 10:59:28 -0500 Content-Transfer-Encoding: quoted-printable Message-Id: References: To: user@cassandra.apache.org X-Mailer: Apple Mail (2.1084) Have you looked at the TTL column feature in 0.7?=20 http://www.datastax.com/dev/blog/whats-new-cassandra-07-expiring-columns Those will automatically expire columns after a certain time period - = not when you near the column limit, but might be helpful for you. On Jun 9, 2011, at 10:51 AM, Bahadur, Kamal wrote: > =46rom the documentation, I came to know that there is a limitation of = maximum number (2 billion) of columns that a column family can have. My = questions is, is there a way to purge the old columns when the number of = columns is nearing the 2 billion mark? > =20 > Thanks, > Kamal