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 CCB454846 for ; Fri, 20 May 2011 01:26:01 +0000 (UTC) Received: (qmail 66087 invoked by uid 500); 20 May 2011 01:25:59 -0000 Delivered-To: apmail-cassandra-user-archive@cassandra.apache.org Received: (qmail 66056 invoked by uid 500); 20 May 2011 01:25:59 -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 66044 invoked by uid 99); 20 May 2011 01:25:59 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Fri, 20 May 2011 01:25:59 +0000 X-ASF-Spam-Status: No, hits=2.2 required=5.0 tests=HTML_MESSAGE,RCVD_IN_DNSWL_NONE,SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (athena.apache.org: local policy) Received: from [208.113.200.5] (HELO homiemail-a83.g.dreamhost.com) (208.113.200.5) by apache.org (qpsmtpd/0.29) with ESMTP; Fri, 20 May 2011 01:25:54 +0000 Received: from homiemail-a83.g.dreamhost.com (localhost [127.0.0.1]) by homiemail-a83.g.dreamhost.com (Postfix) with ESMTP id 9CC2C5E055 for ; Thu, 19 May 2011 18:25:31 -0700 (PDT) DomainKey-Signature: a=rsa-sha1; c=nofws; d=thelastpickle.com; h=from :mime-version:content-type:subject:date:in-reply-to:to :references:message-id; q=dns; s=thelastpickle.com; b=kvkscpSXWO z/V1qBi4u0NAB2b2/6KKLLxrkExmfgT4Axlvkt0jGpYL+g3ZJU3GDrjmc9fFbJ7k LYbdmpm3MlfmsBjy0lfYc7mrUpK3PlO0Mmqi4jZmZFtw0eRhBWkXH7U+btk65pXN b/1dD+44UpqDFAD6wSPvoVX/f7RC3o77c= DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=thelastpickle.com; h=from :mime-version:content-type:subject:date:in-reply-to:to :references:message-id; s=thelastpickle.com; bh=i6OS7NO/Qyb1j+bQ ZA9CudYLGtw=; b=rpmhjV771hU7DMGcUsv/HuS55yg9XIxji/Gibq9m8sPbXp/s 7r9Wd7EFcMDtdt8+1LVDlR/cTg6UZ1paqUjYZafhoOxNlKnYMz3OyhZANQT3nw1B WWBgS521dx1SdvtJtGCxLVkCK7+A3/jSfprTBbk0ruaOwsFL8xg4yMFtUAk= Received: from [10.0.1.151] (121-73-157-230.cable.telstraclear.net [121.73.157.230]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (No client certificate requested) (Authenticated sender: aaron@thelastpickle.com) by homiemail-a83.g.dreamhost.com (Postfix) with ESMTPSA id 05FA55E060 for ; Thu, 19 May 2011 18:25:30 -0700 (PDT) From: aaron morton Mime-Version: 1.0 (Apple Message framework v1084) Content-Type: multipart/alternative; boundary=Apple-Mail-6--1017469622 Subject: Re: Cassandra Vs. Oracle Coherence Date: Fri, 20 May 2011 13:25:28 +1200 In-Reply-To: <47CB67F7850DF34E81C11AFD8DA61C310F41605A@QYNPRDEXMBXAP01.corp.intuit.net> To: user@cassandra.apache.org References: <47CB67F7850DF34E81C11AFD8DA61C310F41605A@QYNPRDEXMBXAP01.corp.intuit.net> Message-Id: <4F87FEC8-1824-4152-AEC8-F1E6750FDF4B@thelastpickle.com> X-Mailer: Apple Mail (2.1084) --Apple-Mail-6--1017469622 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii I've not used Coherence, all I know if from reading the first paragraph = here = http://www.oracle.com/technetwork/middleware/coherence/overview/index.html= and wikipedia:)=20 Cassandra is not a caching layer, it's a database. You can rely on it as = your database, and some people find when they do they no longer need a = caching layer.=20 If you can provide some more details on your use case we can help you = judge if cassandra is a good fit. Or if you can tell us which features = of Coherence you think are a good fit for you we can see if there are = Cassandra equivalents.=20 And is should also say: - cassandra is free - if you have a good idea about how it can be improved, there is a = chance it may get implemented. And if you can provide some dev time an = even better chance.=20 - you can get free support from the community=20 - there are multiple professional services companies that provide = support http://wiki.apache.org/cassandra/ThirdPartySupport =20 Hope that helps.=20 ----------------- Aaron Morton Freelance Cassandra Developer @aaronmorton http://www.thelastpickle.com On 18 May 2011, at 10:44, Karamel, Raghu wrote: > Hi, > =20 > I am new to Cassandra and very excited with the technology. I am = evaluating it and trying to understand the difference between Cassandra = and Oracle Coherence. Precisely , looking for reasons why would some = select Cassandra over Oracle Coherence. Does anyone did the exercise of = comparing them? Appreciate if you can share some information on that. > =20 > Regrads > -RK --Apple-Mail-6--1017469622 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=us-ascii I've not used Coherence, all I know if from reading = the first paragraph here http://www.oracle.com/technetwork/middleware/coherence/overview/= index.html and wikipedia:) 

Cassandra = is not a caching layer, it's a database. You can rely on it as your = database, and some people find when they do they no longer need a = caching layer. 

If you can provide some = more details on your use case we can help you judge if cassandra is a = good fit. Or if you can tell us which features of Coherence you think = are a good fit for you we can see if there are Cassandra = equivalents. 

And is should also = say:

- cassandra is free
- if you = have a good idea about how it can be improved, there is a chance it may = get implemented. And if you can provide some dev time an even better = chance. 
- you can get  free support from the = community 
- there are multiple professional services = companies that provide support http://wiki.apache.org/cassandra/ThirdPartySupport
=  
Hope that helps. 

-----------------
Aaron = Morton
Freelance Cassandra = Developer
@aaronmorton

On 18 May 2011, at 10:44, Karamel, Raghu wrote:

Hi,
I am new to Cassandra and very = excited with the technology. I am evaluating it and trying to understand = the difference between Cassandra and Oracle Coherence. Precisely , = looking for reasons why would some select Cassandra over Oracle = Coherence. Does anyone did the exercise of comparing them? Appreciate if = you can share some information on that.
Regrads