Return-Path: Delivered-To: apmail-cassandra-user-archive@www.apache.org Received: (qmail 98206 invoked from network); 26 Jul 2010 16:50:38 -0000 Received: from unknown (HELO mail.apache.org) (140.211.11.3) by 140.211.11.9 with SMTP; 26 Jul 2010 16:50:38 -0000 Received: (qmail 96996 invoked by uid 500); 26 Jul 2010 16:50:36 -0000 Delivered-To: apmail-cassandra-user-archive@cassandra.apache.org Received: (qmail 96954 invoked by uid 500); 26 Jul 2010 16:50:35 -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 96943 invoked by uid 99); 26 Jul 2010 16:50:35 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 26 Jul 2010 16:50:35 +0000 X-ASF-Spam-Status: No, hits=0.7 required=10.0 tests=RCVD_IN_DNSWL_NONE,SPF_NEUTRAL X-Spam-Check-By: apache.org Received-SPF: neutral (nike.apache.org: local policy) Received: from [209.85.216.44] (HELO mail-qw0-f44.google.com) (209.85.216.44) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 26 Jul 2010 16:50:28 +0000 Received: by qwe5 with SMTP id 5so211958qwe.31 for ; Mon, 26 Jul 2010 09:50:07 -0700 (PDT) MIME-Version: 1.0 Received: by 10.224.36.207 with SMTP id u15mr6562755qad.332.1280163007146; Mon, 26 Jul 2010 09:50:07 -0700 (PDT) Received: by 10.229.61.101 with HTTP; Mon, 26 Jul 2010 09:50:07 -0700 (PDT) In-Reply-To: <387977.33632.qm@web65713.mail.ac4.yahoo.com> References: <387977.33632.qm@web65713.mail.ac4.yahoo.com> Date: Mon, 26 Jul 2010 09:50:07 -0700 Message-ID: Subject: Re: Cassandra Horizontal Scalability From: Benjamin Black To: user@cassandra.apache.org Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Virus-Checked: Checked by ClamAV on apache.org Are you sending all requests to a single server? Performance increases when you add nodes when you send traffic to all of them at once. Adding new ndoes does not cause the old nodes to speed up. Also, 1300 reqs/sec is extremely slow, so something else is likely wrong, as well. On Mon, Jul 26, 2010 at 8:29 AM, SSam wrote: > > From Cassandra Website: > > Elastic > > Read and write throughput both increase linearly as new machines are adde= d, > with no downtime or interruption to applications. > > I am testing TPS with Cassandra cluster. > Initially I have tested with one node cluster , got 1300 TPS, > added another node and I got 1200 TPS with 2 node cluster. > TPS supposed to increase=A0 with every additional node.=A0 I am not sure = what I > am doing wrong?=A0=A0 Any suggestions on Cassandra Scalability? > > Thanks, > Sam. > > >