Return-Path: X-Original-To: apmail-hadoop-hdfs-user-archive@minotaur.apache.org Delivered-To: apmail-hadoop-hdfs-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 6B1579745 for ; Fri, 28 Sep 2012 09:21:47 +0000 (UTC) Received: (qmail 85402 invoked by uid 500); 28 Sep 2012 09:21:42 -0000 Delivered-To: apmail-hadoop-hdfs-user-archive@hadoop.apache.org Received: (qmail 84907 invoked by uid 500); 28 Sep 2012 09:21:36 -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 84886 invoked by uid 99); 28 Sep 2012 09:21:36 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Fri, 28 Sep 2012 09:21:36 +0000 X-ASF-Spam-Status: No, hits=1.5 required=5.0 tests=FSL_RCVD_USER,HTML_MESSAGE,RCVD_IN_DNSWL_LOW,SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (athena.apache.org: domain of dechouxb@gmail.com designates 209.85.216.41 as permitted sender) Received: from [209.85.216.41] (HELO mail-qa0-f41.google.com) (209.85.216.41) by apache.org (qpsmtpd/0.29) with ESMTP; Fri, 28 Sep 2012 09:21:29 +0000 Received: by qatp27 with SMTP id p27so5894548qat.14 for ; Fri, 28 Sep 2012 02:21:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to:content-type; bh=gcYrLIudO1txpHikXuSJTzD/xuQMPQ0yTz+RyhtDLTY=; b=WknZ6um5Ihs0PNcL9KnpYjPftqEgkSgVk3uDnR3vwKy8tP4bnYXLsLbadlEp1MJfee q4fI12qWN9kbRD8Gg43yBfRgJbj+5+zziJkTMnQpCCc/rBKjKwOEDEEy8LS4nS3YmXTr 2Z1cTvwQpI2dYNEeXq/tSCUXdywC5yOsqySIF/LYo0epkMEuGf2n395xrfUS+VHGISO+ OGIqYzNlDKyoZfi6mE6mB9rLfUASmjIwxr9dcwycqy+cezQTEcHqdcFFDiiVrb9nW3mH 4HPYlRPsMCanGWFxld3dCFEz3Qng0AQWHJRQu5HCwaMQBgy6U8iLaFzQYRcpDC+mYpoF IRCg== MIME-Version: 1.0 Received: by 10.224.168.83 with SMTP id t19mr15824974qay.8.1348824068950; Fri, 28 Sep 2012 02:21:08 -0700 (PDT) Received: by 10.49.71.231 with HTTP; Fri, 28 Sep 2012 02:21:08 -0700 (PDT) Date: Fri, 28 Sep 2012 11:21:08 +0200 Message-ID: Subject: dfs.name.dir replication and disk not available From: Bertrand Dechoux To: user@hadoop.apache.org Content-Type: multipart/alternative; boundary=20cf3074b5ce7e88ae04cabf9399 X-Virus-Checked: Checked by ClamAV on apache.org --20cf3074b5ce7e88ae04cabf9399 Content-Type: text/plain; charset=ISO-8859-1 Hi, I was wondering about the safety of multiples dfs.name.dir directories. On one hand, we want all copies to be synchronised but on the other hand if a hard drive fail we would like the namenode still to be operational. How does that work? I know there is the source but I was hoping for a higher level description. Regards Bertrand PS : I am interested about the behaviour of the last stable version ie 1.0.3. Not in the old issues that were solved. --20cf3074b5ce7e88ae04cabf9399 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Hi,

I was wondering about the safety of multiples dfs.name.dir direc= tories.
On one hand, we want all copies to be synchronised but on the ot= her hand if a hard drive fail we would like the namenode still to be operat= ional.
How does that work? I know there is the source but I was hoping for a highe= r level description.

Regards

Bertrand

PS= : I am interested about the behaviour of the last stable version ie 1.0.3.= Not in the old issues that were solved.
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