Return-Path: Delivered-To: apmail-hadoop-core-dev-archive@www.apache.org Received: (qmail 50339 invoked from network); 13 May 2009 08:53:11 -0000 Received: from hermes.apache.org (HELO mail.apache.org) (140.211.11.3) by minotaur.apache.org with SMTP; 13 May 2009 08:53:11 -0000 Received: (qmail 10634 invoked by uid 500); 13 May 2009 08:53:10 -0000 Delivered-To: apmail-hadoop-core-dev-archive@hadoop.apache.org Received: (qmail 10568 invoked by uid 500); 13 May 2009 08:53:09 -0000 Mailing-List: contact core-dev-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: core-dev@hadoop.apache.org Delivered-To: mailing list core-dev@hadoop.apache.org Received: (qmail 10558 invoked by uid 99); 13 May 2009 08:53:09 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 13 May 2009 08:53:09 +0000 X-ASF-Spam-Status: No, hits=-2000.0 required=10.0 tests=ALL_TRUSTED X-Spam-Check-By: apache.org Received: from [140.211.11.140] (HELO brutus.apache.org) (140.211.11.140) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 13 May 2009 08:53:06 +0000 Received: from brutus (localhost [127.0.0.1]) by brutus.apache.org (Postfix) with ESMTP id 92A13234C041 for ; Wed, 13 May 2009 01:52:45 -0700 (PDT) Message-ID: <1264807720.1242204765599.JavaMail.jira@brutus> Date: Wed, 13 May 2009 01:52:45 -0700 (PDT) From: "Hong Tang (JIRA)" To: core-dev@hadoop.apache.org Subject: [jira] Created: (HADOOP-5817) Preventing node from swapping MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394 X-Virus-Checked: Checked by ClamAV on apache.org Preventing node from swapping ----------------------------- Key: HADOOP-5817 URL: https://issues.apache.org/jira/browse/HADOOP-5817 Project: Hadoop Core Issue Type: Improvement Components: mapred Reporter: Hong Tang When a node swaps, it slows everything: maps running on that node, reducers fetching output from the node, and DFS clients reading from the DN. We should just treat it the same way as if OS exhausts memory and kill some tasks to free up memory. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.