Return-Path: X-Original-To: apmail-hadoop-mapreduce-user-archive@minotaur.apache.org Delivered-To: apmail-hadoop-mapreduce-user-archive@minotaur.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id 673EFE269 for ; Thu, 6 Dec 2012 17:01:37 +0000 (UTC) Received: (qmail 48510 invoked by uid 500); 6 Dec 2012 17:01:32 -0000 Delivered-To: apmail-hadoop-mapreduce-user-archive@hadoop.apache.org Received: (qmail 48439 invoked by uid 500); 6 Dec 2012 17:01:32 -0000 Mailing-List: contact user-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: user@hadoop.apache.org Delivered-To: mailing list user@hadoop.apache.org Received: (qmail 48430 invoked by uid 99); 6 Dec 2012 17:01:32 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 06 Dec 2012 17:01:32 +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 (athena.apache.org: domain of harsh@cloudera.com designates 209.85.223.177 as permitted sender) Received: from [209.85.223.177] (HELO mail-ie0-f177.google.com) (209.85.223.177) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 06 Dec 2012 17:01:27 +0000 Received: by mail-ie0-f177.google.com with SMTP id k13so10539041iea.36 for ; Thu, 06 Dec 2012 09:01:06 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20120113; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :content-type:x-gm-message-state; bh=e+tMQUKTyX7Dhzg7SxXqD1LMm4Y8kHvEIfNedRppJIA=; b=Q05K6rds7nvjv5uJCBStIiM3iGXUqHQVANkKDNRgKwBKhvz0jNXJmYPyi+p0ipMF32 fsyS2hKSm9n8t8vjzNCczEj3HrK14XiTuR8TJ+K7kd/xY38CrWghuP81b26AKdy86BEU FKjkWWBswIDt/yyKFdlYnjZB2PzYhz6eh2moyXivQM3X37COU/1iC6+bMY8P2l2srGpO H82MLUSL6cza7OjnLJuBJGgC8uuXYRPSXmELt0a1vYVess1o35eB0qlC+Te9aVI4ZrUx 3ZX8GqckMCE20DzRcUvTY7Er8AVizy5m/1hISo6k4+9BHxFif8WBq+fMP2oz+VhFT/fN +zoQ== Received: by 10.50.194.196 with SMTP id hy4mr2114343igc.52.1354813266817; Thu, 06 Dec 2012 09:01:06 -0800 (PST) MIME-Version: 1.0 Received: by 10.64.6.129 with HTTP; Thu, 6 Dec 2012 09:00:46 -0800 (PST) In-Reply-To: References: From: Harsh J Date: Thu, 6 Dec 2012 22:30:46 +0530 Message-ID: Subject: Re: Hadoop V/S Cassandra To: "" Content-Type: text/plain; charset=ISO-8859-1 X-Gm-Message-State: ALoCoQkhP97tX2KAfZ8Q7VKF3t9NoMutCXaSJ5f3eAq94IY38O7Uwe4r4/rBwhVH9D90ZGX9Ad54 X-Virus-Checked: Checked by ClamAV on apache.org Hi Yogesh, Just wanted to correct one point of yours: On Thu, Dec 6, 2012 at 10:25 PM, yogesh dhari wrote: > Hadoop have single point of Failure but Cassandra doesn't.. In case you aren't aware yet, Hadoop (HDFS) has no single point of failure anymore. The HDFS project implemented HA quite a while ago and it works pretty well (and several of our customers run it too). See http://hadoop.apache.org/docs/current/hadoop-yarn/hadoop-yarn-site/HDFSHighAvailability.html for more. The release of 2.0.3, coming very soon, will also have a non-NFS dependent form of HA support (trunk already has it). -- Harsh J