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 CA9DD966D for ; Sun, 25 Mar 2012 16:27:44 +0000 (UTC) Received: (qmail 87208 invoked by uid 500); 25 Mar 2012 16:27:42 -0000 Delivered-To: apmail-cassandra-user-archive@cassandra.apache.org Received: (qmail 87186 invoked by uid 500); 25 Mar 2012 16:27:42 -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 87177 invoked by uid 99); 25 Mar 2012 16:27:42 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Sun, 25 Mar 2012 16:27:42 +0000 X-ASF-Spam-Status: No, hits=-0.7 required=5.0 tests=RCVD_IN_DNSWL_LOW,SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (nike.apache.org: domain of edlinuxguru@gmail.com designates 209.85.210.172 as permitted sender) Received: from [209.85.210.172] (HELO mail-iy0-f172.google.com) (209.85.210.172) by apache.org (qpsmtpd/0.29) with ESMTP; Sun, 25 Mar 2012 16:27:36 +0000 Received: by iazz13 with SMTP id z13so8306983iaz.31 for ; Sun, 25 Mar 2012 09:27:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type:content-transfer-encoding; bh=wdh24AiSldI3zjW6IWfKBROn7jJQXnHhz+52ROLtH1o=; b=GUnPUMZQozlkug7G7wRr0e7MadtGN5D6VGzfTVZBAP1mrczWOQLvRILmgoSZJZvwdD PtdIt/RDLjRMLDI7vOhc8hosA9gvsXRYNZhtc0L/T8TO2XRtUp5j4FsJHDyVscd2v+HH SSfLr/QYyhT0k3FP7EmQQrQQM/CZRZbcWIecUFhhJ7SvqCS8IEb/uI0BZdzh2/ydFkpv qugFZJZUTnlc66W4iFSMpVMcs2Gwa0axPMmFjrWL5Mn7Kq0q6k1QlZd6Kw9ORg31ppb6 DlEb/d1DiLtFUpJbYStMn5IoX398mwIZJLpa8rfY+hZb95n3vD8+0rQCxhHtdeQDM4Tv qJng== MIME-Version: 1.0 Received: by 10.42.138.9 with SMTP id a9mr11165941icu.14.1332692835759; Sun, 25 Mar 2012 09:27:15 -0700 (PDT) Received: by 10.42.197.1 with HTTP; Sun, 25 Mar 2012 09:27:15 -0700 (PDT) In-Reply-To: References: Date: Sun, 25 Mar 2012 12:27:15 -0400 Message-ID: Subject: Re: Fwd: information on cassandra From: Edward Capriolo To: user@cassandra.apache.org Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable It is fine to start with one or two nodes. An important caveat is operations at QUORUM actually turn into ALL because QUORUM can not be done with 2 nodes. The operations will still work but the failure path is different. On Sun, Mar 25, 2012 at 10:11 AM, Ertio Lew wrote: > I guess 2 node cluster with RF=3D2 might also be a starting point. Isn't = it ? > Are there any issues with this ? > > On Sun, Mar 25, 2012 at 12:20 AM, samal wrote: >> >> Cassandra has distributed architecture. So 1 node does not fit into it. >> although it can used but you loose its benefits , ok if you are just pla= ying >> around, use vm=A0 to learn how cluster communicate, handle request. >> >> To get full tolerance, redundancy and consistency minimum 3 node is >> required. >> >> Imp read here: >> http://wiki.apache.org/cassandra/ >> http://www.datastax.com/docs/1.0/index >> http://thelastpickle.com/ >> http://www.acunu.com/blogs/all/ >> >> >> >> On Sat, Mar 24, 2012 at 11:37 PM, Garvita Mehta >> wrote: >>> >>> its not advisable to use cassandra on single node, as its basic >>> definition says if a node fails, data still remains in the system, atle= ast 3 >>> nodes must be there=A0while setting up a cassandra cluster. >>> >>> >>> Garvita Mehta >>> CEG - Open Source Technology Group >>> Tata Consultancy Services >>> Ph:- +91 22 67324756 >>> Mailto: garvita.mehta@tcs.com >>> Website: http://www.tcs.com >>> ____________________________________________ >>> Experience certainty. IT Services >>> Business Solutions >>> Outsourcing >>> ____________________________________________ >>> >>> -----puneet loya wrote: ----- >>> >>> To: user@cassandra.apache.org >>> From: puneet loya >>> Date: 03/24/2012 06:36PM >>> Subject: Fwd: information on cassandra >>> >>> >>> >>> >>> hi, >>> >>> I m puneet, an engineering student. I would like to know that, is >>> cassandra useful considering we just have a single node(rather a single >>> system) having all the information. >>> I m looking for decent response time for the database. can you please >>> respond? >>> >>> Thank you , >>> >>> Regards, >>> >>> Puneet Loya >>> >>> =3D=3D=3D=3D=3D-----=3D=3D=3D=3D=3D-----=3D=3D=3D=3D=3D >>> Notice: The information contained in this e-mail >>> message and/or attachments to it may contain >>> confidential or privileged information. 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