Return-Path: Delivered-To: apmail-hadoop-common-user-archive@www.apache.org Received: (qmail 66775 invoked from network); 31 Aug 2010 19:50:31 -0000 Received: from unknown (HELO mail.apache.org) (140.211.11.3) by 140.211.11.9 with SMTP; 31 Aug 2010 19:50:31 -0000 Received: (qmail 2184 invoked by uid 500); 31 Aug 2010 19:50:27 -0000 Delivered-To: apmail-hadoop-common-user-archive@hadoop.apache.org Received: (qmail 2111 invoked by uid 500); 31 Aug 2010 19:50:26 -0000 Mailing-List: contact common-user-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: common-user@hadoop.apache.org Delivered-To: mailing list common-user@hadoop.apache.org Received: (qmail 2097 invoked by uid 99); 31 Aug 2010 19:50:25 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 31 Aug 2010 19:50:25 +0000 X-ASF-Spam-Status: No, hits=0.7 required=10.0 tests=SPF_NEUTRAL X-Spam-Check-By: apache.org Received-SPF: neutral (nike.apache.org: local policy) Received: from [216.145.54.172] (HELO mrout2.yahoo.com) (216.145.54.172) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 31 Aug 2010 19:50:19 +0000 Received: from pbug.corp.yahoo.com (pbug.corp.yahoo.com [207.126.231.185]) by mrout2.yahoo.com (8.13.8/8.13.8/y.out) with ESMTP id o7VJmvgk099903 for ; Tue, 31 Aug 2010 12:48:57 -0700 (PDT) DomainKey-Signature: a=rsa-sha1; s=serpent; d=yahoo-inc.com; c=nofws; q=dns; h=received:date:message-id:from:reply-to:to:subject:in-reply-to; b=uerkBTck+3irjMHuPntmOe7ybLSJfIIFlBnKPp1WiuBzOVxonabVM+uFHsW9Aott Received: (from roelofs@localhost) by pbug.corp.yahoo.com (8.12.11/8.12.11/Submit) id o7VJmvK9005512 for common-user@hadoop.apache.org; Tue, 31 Aug 2010 12:48:57 -0700 Date: Tue, 31 Aug 2010 12:48:57 -0700 Message-Id: <201008311948.o7VJmvK9005512@pbug.corp.yahoo.com> From: Greg Roelofs Reply-To: Greg Roelofs To: common-user@hadoop.apache.org Subject: Re: cluster startup problem In-Reply-To: X-Virus-Checked: Checked by ClamAV on apache.org Hemanth Yamijala wrote: > On Mon, Aug 30, 2010 at 8:19 AM, Gang Luo wrote: > > > > 1. Can I share hadoop code and its configuration across nodes? Say I have a > > distributed file system running in the cluster and all the nodes could see the > > hadoop code and conf there. So all the nodes will use the same copy of code and > > conf to run. Is it possible? > If they are on the same path, technically it should be possible. > However, I am not sure it is advisable at all. We've tried to do > something like this using NFS and it fails in ways that make debugging > extremely hard. Read-only NFS? I recently looked into an NFS-related unit-test bug (MR-2041), but those failures were due to directory creation and/or permissions-setting (i.e., writing), apparently timing-related. Greg