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 F04701058E for ; Fri, 6 Sep 2013 13:55:18 +0000 (UTC) Received: (qmail 82675 invoked by uid 500); 6 Sep 2013 13:55:18 -0000 Delivered-To: apmail-tajo-dev-archive@tajo.apache.org Received: (qmail 82642 invoked by uid 500); 6 Sep 2013 13:55:18 -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 82608 invoked by uid 99); 6 Sep 2013 13:55:17 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Fri, 06 Sep 2013 13:55:17 +0000 X-ASF-Spam-Status: No, hits=-2002.4 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; Fri, 06 Sep 2013 13:55:14 +0000 Received: (qmail 82333 invoked by uid 99); 6 Sep 2013 13:54:52 -0000 Received: from arcas.apache.org (HELO arcas.apache.org) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Fri, 06 Sep 2013 13:54:52 +0000 Date: Fri, 6 Sep 2013 13:54:52 +0000 (UTC) From: "Hyunsik Choi (JIRA)" To: dev@tajo.incubator.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Updated] (TAJO-149) Eliminate QueryConf and its file write 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-149?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Hyunsik Choi updated TAJO-149: ------------------------------ Status: Patch Available (was: Open) > Eliminate QueryConf and its file write > -------------------------------------- > > Key: TAJO-149 > URL: https://issues.apache.org/jira/browse/TAJO-149 > Project: Tajo > Issue Type: Improvement > Components: master, worker > Reporter: Hyunsik Choi > Assignee: Hyunsik Choi > Fix For: 0.2-incubating > > Attachments: TAJO-149.patch > > > QueryConf is a subclass of org.apache.hadoop.conf.Configuration. This has a similar mechanism of JobConf of MapReduce. It has overheads and too big to be distributed across a number of nodes. I've added QueryMeta to the patch of TAJO-144. QueryMeta contains a set of key-value pairs and is based on protobuf. Since QueryMeta is a wrapper class of a protobuf message and will contain only specific information for each query, it will be very lightweight and is easy to be disseminated across a number of nodes. > In this issue, we will replace QueryConf by QueryMeta, and we will eliminate the part where QueryConf is written as a xml file on HDFS. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira