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 E64FB7F56 for ; Mon, 29 Aug 2011 07:40:17 +0000 (UTC) Received: (qmail 92268 invoked by uid 500); 29 Aug 2011 07:40:15 -0000 Delivered-To: apmail-cassandra-user-archive@cassandra.apache.org Received: (qmail 91431 invoked by uid 500); 29 Aug 2011 07:40:04 -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 91360 invoked by uid 99); 29 Aug 2011 07:40:01 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 29 Aug 2011 07:40:01 +0000 X-ASF-Spam-Status: No, hits=-0.0 required=5.0 tests=RCVD_IN_DNSWL_LOW,SPF_NEUTRAL X-Spam-Check-By: apache.org Received-SPF: neutral (athena.apache.org: local policy) Received: from [209.85.220.172] (HELO mail-vx0-f172.google.com) (209.85.220.172) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 29 Aug 2011 07:39:53 +0000 Received: by vxi29 with SMTP id 29so5116916vxi.31 for ; Mon, 29 Aug 2011 00:39:31 -0700 (PDT) MIME-Version: 1.0 Received: by 10.220.106.201 with SMTP id y9mr1565910vco.241.1314603571639; Mon, 29 Aug 2011 00:39:31 -0700 (PDT) Sender: scode@scode.org Received: by 10.52.164.131 with HTTP; Mon, 29 Aug 2011 00:39:31 -0700 (PDT) X-Originating-IP: [94.234.170.34] In-Reply-To: References: Date: Mon, 29 Aug 2011 09:39:31 +0200 X-Google-Sender-Auth: F2TbKDitI6CHwArEFmya_kdGJyY Message-ID: Subject: Re: What are the things to watch out for with big nodes From: Peter Schuller To: user@cassandra.apache.org Content-Type: text/plain; charset=UTF-8 > If I have a cluster with 15-20T nodes, somethings that I know will be a > potential problem are > > Compactions taking longer > Higher read latencies > Long time for adding/removing nodes > > What are other things that can be problematic with big nodes? http://wiki.apache.org/cassandra/LargeDataSetConsiderations (some details slightly out of date by now, I should try to update it) Honestly though, I don't recommend going for nodes that big unless you want to spend time dealing with issues you'll hit. -- / Peter Schuller (@scode on twitter)