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 6C2412395 for ; Wed, 4 May 2011 00:01:13 +0000 (UTC) Received: (qmail 82414 invoked by uid 500); 4 May 2011 00:01:11 -0000 Delivered-To: apmail-cassandra-user-archive@cassandra.apache.org Received: (qmail 82384 invoked by uid 500); 4 May 2011 00:01:11 -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 82376 invoked by uid 99); 4 May 2011 00:01:11 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 04 May 2011 00:01:11 +0000 X-ASF-Spam-Status: No, hits=1.5 required=5.0 tests=FREEMAIL_FROM,HTML_MESSAGE,RCVD_IN_DNSWL_LOW,RFC_ABUSE_POST,SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (nike.apache.org: domain of baskar.duraikannu.db@gmail.com designates 209.85.220.172 as permitted sender) Received: from [209.85.220.172] (HELO mail-vx0-f172.google.com) (209.85.220.172) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 04 May 2011 00:01:01 +0000 Received: by vxg33 with SMTP id 33so648369vxg.31 for ; Tue, 03 May 2011 17:00:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:message-id:from:to:references:subject:date :mime-version:content-type:x-priority:x-msmail-priority:x-mailer :x-mimeole; bh=zdPZuSlvItoxl2FILhcz3udze2HJKkIXq4FEpfIUlPU=; b=Af2Z1NjrTfoPchBdhpv12V+qq/qrO4+RHZPv7pvninwCsnnePcFHehYyGFByFvoiH7 YCX/KznwY56CBOJG12gBbIAh48SLOZsfOogo/wybquN2rlQ5czsy5kNcP5QxFELRnV7h NSiip6WruQXYx+ClHBpDDmRQTNRrHVuCvnWuo= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:from:to:references:subject:date:mime-version :content-type:x-priority:x-msmail-priority:x-mailer:x-mimeole; b=CESXIhloT8pgp0Sr2+nnS+RfPhdZrdvByToLQgCTeXu4efGCVffwjHbp1MivgigAoi CoGwVQeQKN9eNt4SGto6Jj2xNylgv6RF0D7JaSuOivHqx61LEYo7vl03Uj5oU0xMw5pr Iz/sq59NFVoJgDxebW+5QkaO5BH8YSKF4b1fI= Received: by 10.52.72.67 with SMTP id b3mr551150vdv.215.1304467240391; Tue, 03 May 2011 17:00:40 -0700 (PDT) Received: from usnynyc1lpt0050 (66-87-32-90.pools.spcsdns.net [66.87.32.90]) by mx.google.com with ESMTPS id b24sm233042vby.7.2011.05.03.17.00.37 (version=SSLv3 cipher=OTHER); Tue, 03 May 2011 17:00:39 -0700 (PDT) Message-ID: From: "Baskar Duraikannu" To: References: <103DA7CF218C41CDABC9D5F13685D5C8@us.ad.irmc.com><7340C7DBB090442F99B78E77C2046C24@us.ad.irmc.com> Subject: Re: Performance tests using stress testing tool Date: Tue, 3 May 2011 20:00:33 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0003_01CC09CC.C2DE03D0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5931 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5994 X-Virus-Checked: Checked by ClamAV on apache.org This is a multi-part message in MIME format. ------=_NextPart_000_0003_01CC09CC.C2DE03D0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Thanks Peter.=20 I believe...I found the root cause. Switch that we used was bad.=20 Now on a 4 node cluster ( Each Node has 1 CPU - Quad Core and 16 GB of = RAM),=20 I was able to get around 11,000 writes and 10,050 reads per second = simultaneously (CPU usage is around 45% on all nodes. Disk queue size is = in the neighbourhood of 10) Is this inline with what you usually see with Cassandra?=20 ----- Original Message -----=20 From: Peter Schuller=20 To: user@cassandra.apache.org=20 Sent: Friday, April 29, 2011 12:21 PM Subject: Re: Performance tests using stress testing tool > Thanks Peter. I am using java version of the stress testing tool from = the > contrib folder. Is there any issue that should be aware of? Do you = recommend > using pystress? I just saw Brandon file this: https://issues.apache.org/jira/browse/CASSANDRA-2578 Maybe that's it. --=20 / Peter Schuller ------=_NextPart_000_0003_01CC09CC.C2DE03D0 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable =EF=BB=BF
Thanks Peter.
 
I believe...I found the root cause. = Switch that we=20 used was bad.
Now on a 4 node cluster ( Each Node has = 1 CPU =20 - Quad Core and 16 GB of RAM),
I was able to get around 11,000 writes = and 10,050=20 reads per second simultaneously (CPU = usage is=20 around 45% on all nodes. Disk queue size is in the neighbourhood of = 10)
 
Is this inline with what you usually = see with=20 Cassandra?
 
 
----- Original Message -----=20
From: Peter Schuller
Sent: Friday, April 29, 2011 12:21 PM
Subject: Re: Performance tests using stress testing = tool

> Thanks Peter. I am using java version of the stress = testing=20 tool from the
> contrib folder. Is there any issue that should be = aware=20 of? Do you recommend
> using pystress?

I just saw Brandon = file=20 this:
https://iss= ues.apache.org/jira/browse/CASSANDRA-2578

Maybe=20 that's it.

--
/ Peter Schuller
------=_NextPart_000_0003_01CC09CC.C2DE03D0--