Return-Path: Delivered-To: apmail-hadoop-general-archive@minotaur.apache.org Received: (qmail 50415 invoked from network); 11 Jan 2010 11:10:45 -0000 Received: from hermes.apache.org (HELO mail.apache.org) (140.211.11.3) by minotaur.apache.org with SMTP; 11 Jan 2010 11:10:45 -0000 Received: (qmail 73948 invoked by uid 500); 11 Jan 2010 11:10:44 -0000 Delivered-To: apmail-hadoop-general-archive@hadoop.apache.org Received: (qmail 73871 invoked by uid 500); 11 Jan 2010 11:10:44 -0000 Mailing-List: contact general-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: general@hadoop.apache.org Delivered-To: mailing list general@hadoop.apache.org Received: (qmail 73861 invoked by uid 99); 11 Jan 2010 11:10:44 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 11 Jan 2010 11:10:44 +0000 X-ASF-Spam-Status: No, hits=2.2 required=10.0 tests=HTML_MESSAGE,SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (athena.apache.org: domain of antonio.mailing@gmail.com designates 209.85.218.223 as permitted sender) Received: from [209.85.218.223] (HELO mail-bw0-f223.google.com) (209.85.218.223) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 11 Jan 2010 11:10:37 +0000 Received: by bwz23 with SMTP id 23so13779490bwz.29 for ; Mon, 11 Jan 2010 03:10:16 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:date:message-id:subject :from:to:content-type; bh=owQMYHEeiw9JxXEkXbT60kSsv4eSnX48X9XQzYc4xUc=; b=UKpDG+6B2hUn1iNR7puLRobOCefMCF1e+Bwze1Hz7e36Szjaod/npWOBr5+cEdAfpg pxVxXFBFYrIax54QdadZedyVTz5Z77s8RGT2n9l9YnlKdKrYZce8fQscgVWlrNbiimmf bPMKNG4RbyTZ+9ku5kcgbbwgdziKGSKRUfVuM= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type; b=KzPiQDaSeDsr3CyyLn7qT6vz0u/Q2RIPNuV2iaBoMSYptfPWoXr6x/4mOMJp8La1sL XRTN/2TeQnywHXeXvCGmWDv+C4FfnWWuHADe88DXz6mKEfLo/KzWIVvHw2D0+i18GJ4z yMQgFnZJPyQi2cxQU0E64fwkSRGFDbzS4bHj8= MIME-Version: 1.0 Received: by 10.204.157.2 with SMTP id z2mr3061339bkw.211.1263208216594; Mon, 11 Jan 2010 03:10:16 -0800 (PST) Date: Mon, 11 Jan 2010 12:10:16 +0100 Message-ID: Subject: Running Hadoop across data centers From: Antonio Goncalves To: general@hadoop.apache.org Content-Type: multipart/alternative; boundary=0015175cf8ca0708fa047ce195c1 --0015175cf8ca0708fa047ce195c1 Content-Type: text/plain; charset=ISO-8859-1 Hi all, I'm reading the excellent Tom White Hadoop guide and there is this sentence written : "At the time of this writing, Hadoop is not suited for running across data centers" Do you know if it's still the case ? Do you know what are the technical reasons behind that ? We are planning to test MapReduce in several scenarios, one being multiple data centers (one in France and the other one in Germany with special network lines). Wouldn't that be possible ? Thanks, Antonio --0015175cf8ca0708fa047ce195c1--