Return-Path: X-Original-To: apmail-tajo-dev-archive@minotaur.apache.org Delivered-To: apmail-tajo-dev-archive@minotaur.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id CED9C101EE for ; Wed, 23 Oct 2013 05:13:12 +0000 (UTC) Received: (qmail 26457 invoked by uid 500); 23 Oct 2013 05:13:11 -0000 Delivered-To: apmail-tajo-dev-archive@tajo.apache.org Received: (qmail 26386 invoked by uid 500); 23 Oct 2013 05:13:11 -0000 Mailing-List: contact dev-help@tajo.incubator.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: dev@tajo.incubator.apache.org Delivered-To: mailing list dev@tajo.incubator.apache.org Received: (qmail 26372 invoked by uid 99); 23 Oct 2013 05:13:10 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 23 Oct 2013 05:13:10 +0000 X-ASF-Spam-Status: No, hits=-2000.4 required=5.0 tests=ALL_TRUSTED,RP_MATCHES_RCVD X-Spam-Check-By: apache.org Received: from [140.211.11.3] (HELO mail.apache.org) (140.211.11.3) by apache.org (qpsmtpd/0.29) with SMTP; Wed, 23 Oct 2013 05:13:09 +0000 Received: (qmail 25630 invoked by uid 99); 23 Oct 2013 05:12:44 -0000 Received: from arcas.apache.org (HELO arcas.apache.org) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 23 Oct 2013 05:12:44 +0000 Date: Wed, 23 Oct 2013 05:12:44 +0000 (UTC) From: "Keuntae Park (JIRA)" To: dev@tajo.incubator.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Updated] (TAJO-275) Separating QueryMaster and TaskRunner roles in worker 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 [ https://issues.apache.org/jira/browse/TAJO-275?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Keuntae Park updated TAJO-275: ------------------------------ Attachment: TAJO-275.patch I've uploaded the patch for the issue. CHANGES: - Worker mode added in configuration tajo.worker.mode.querymaster (default: true) tajo.worker.mode.taskrunner (default: true) - Following shell command is added (in bin/start-tajo.sh) "$bin/tajo-daemons.sh" --host querymasters cd "$TAJO_HOME" \; "$bin/tajo-daemon.sh" start querymaster (in bin/stop-tajo.sh) "$bin/tajo-daemons.sh" --host querymasters cd "$TAJO_HOME" \; "$bin/tajo-daemon.sh" stop querymaster - If not specified in configuration, worker works as before, i.e., one worker has both querymaster and taskrunner roles. - How to have querymaster and taskrunner as separate daemons: 1) add following in conf/tajo-site.xml tajo.worker.mode.querymaster=false 2) add list of querymaster servers in conf/querymaster 3) execute bin/tajo-start.sh - How to start/stop querymaster in a given server bin/tajo-daemon.sh start querymaster bin/tajo-daemon.sh stop querymaster > Separating QueryMaster and TaskRunner roles in worker > ----------------------------------------------------- > > Key: TAJO-275 > URL: https://issues.apache.org/jira/browse/TAJO-275 > Project: Tajo > Issue Type: Improvement > Reporter: Keuntae Park > Assignee: Keuntae Park > Attachments: TAJO-275.patch > > > In C++ implementation of Tajo worker, > I think it is better to maintain Java code of QueryMaster and implement only TaskRunner as C++ code, rather than implementing both QueryMaster and TaskRunner as C++ code. > Accordingly, standby mode worker will have following 3 modes: > 1) TaskRunner + QueryMaster (current implementation) > 2) TaskRunner only (C++) > 3) QueryMaster only (java) > As a result, most workers work as C++ TaskRunner, and 1 or 2 workers work as separate QueryMasters (java process). > For backward compatibility, default mode should be mode 1 (TaskRunner + QueryMaster) -- This message was sent by Atlassian JIRA (v6.1#6144)