Return-Path: Delivered-To: apmail-hadoop-core-user-archive@www.apache.org Received: (qmail 20762 invoked from network); 30 Jul 2008 09:32:01 -0000 Received: from hermes.apache.org (HELO mail.apache.org) (140.211.11.2) by minotaur.apache.org with SMTP; 30 Jul 2008 09:32:01 -0000 Received: (qmail 57353 invoked by uid 500); 30 Jul 2008 09:31:55 -0000 Delivered-To: apmail-hadoop-core-user-archive@hadoop.apache.org Received: (qmail 57286 invoked by uid 500); 30 Jul 2008 09:31:54 -0000 Mailing-List: contact core-user-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: core-user@hadoop.apache.org Delivered-To: mailing list core-user@hadoop.apache.org Received: (qmail 57243 invoked by uid 99); 30 Jul 2008 09:31:54 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 30 Jul 2008 02:31:54 -0700 X-ASF-Spam-Status: No, hits=-0.0 required=10.0 tests=SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (athena.apache.org: domain of Pratyushbanerjee@aol.com designates 64.12.143.100 as permitted sender) Received: from [64.12.143.100] (HELO imo-m12.mail.aol.com) (64.12.143.100) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 30 Jul 2008 09:31:00 +0000 Received: from Pratyushbanerjee@aol.com by imo-m12.mx.aol.com (mail_out_v38_r9.4.) id 9.ca8.2d832151 (34983) for ; Wed, 30 Jul 2008 05:31:22 -0400 (EDT) Received: from localhost.localdomain ([10.146.163.166]) by cia-da08.mx.aol.com (v121_r2.11) with ESMTP id MAILCIADA088-88a7489034de18d; Wed, 30 Jul 2008 05:31:22 -0400 Message-ID: <489034C4.9010901@aol.com> Date: Wed, 30 Jul 2008 15:00:44 +0530 From: Pratyush Banerjee User-Agent: Thunderbird 2.0.0.16 (X11/20080707) MIME-Version: 1.0 To: core-user@hadoop.apache.org Subject: Why does mapred.tasktracker.expiry.interval default to 10 mins ? Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-AOL-IP: 10.146.163.166 X-Mailer: Unknown (No Version) X-Virus-Checked: Checked by ClamAV on apache.org X-Old-Spam-Flag: NO Hi All, I have been using hadoop on a 50 machine cluster for sometime now and just wondered why the mapred.tasktracker.expiry.interval defaulted to 10 minutes. If I want to reduce it to 1 min i.e. 6000 msec, should that cause any problems. Also do i need to modify mapred.task.timeout accordingly to suit my reduced mapred.tasktracker.expiry.interval ? thanks and regards, Pratyush