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 81125D8EB for ; Thu, 20 Sep 2012 19:11:07 +0000 (UTC) Received: (qmail 48265 invoked by uid 500); 20 Sep 2012 19:11:05 -0000 Delivered-To: apmail-cassandra-user-archive@cassandra.apache.org Received: (qmail 48210 invoked by uid 500); 20 Sep 2012 19:11:05 -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 48202 invoked by uid 99); 20 Sep 2012 19:11:04 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 20 Sep 2012 19:11:04 +0000 X-ASF-Spam-Status: No, hits=-2.3 required=5.0 tests=RCVD_IN_DNSWL_MED,SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (nike.apache.org: local policy) Received: from [192.174.58.133] (HELO XEDGEB.nrel.gov) (192.174.58.133) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 20 Sep 2012 19:10:57 +0000 Received: from XHUBA.nrel.gov (10.20.4.58) by XEDGEB.nrel.gov (192.174.58.133) with Microsoft SMTP Server (TLS) id 8.3.245.1; Thu, 20 Sep 2012 13:10:29 -0600 Received: from MAILBOX2.nrel.gov ([fe80::19a0:6c19:6421:12f]) by XHUBA.nrel.gov ([::1]) with mapi; Thu, 20 Sep 2012 13:10:35 -0600 From: "Hiller, Dean" To: "user@cassandra.apache.org" Date: Thu, 20 Sep 2012 13:10:33 -0600 Subject: any ways to have compaction use less disk space? Thread-Topic: any ways to have compaction use less disk space? Thread-Index: Ac2XY5xPkZSpXCSCRt6qKZ2lK6jEgQ== Message-ID: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: user-agent: Microsoft-MacOutlook/14.2.3.120616 acceptlanguage: en-US Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 While diskspace is cheap, nodes are not that cheap, and usually systems hav= e a 1T limit on each node which means we would love to really not add more = nodes until we hit 70% disk space instead of the normal 50% that we have re= ad about due to compaction. Is there any way to use less disk space during compactions? Is there any work being done so that compactions take less space in the fut= ure meaning we can buy less nodes? Thanks, Dean