Return-Path: Delivered-To: apmail-incubator-chukwa-dev-archive@www.apache.org Received: (qmail 31002 invoked from network); 29 Dec 2010 03:12:11 -0000 Received: from unknown (HELO mail.apache.org) (140.211.11.3) by 140.211.11.9 with SMTP; 29 Dec 2010 03:12:11 -0000 Received: (qmail 37468 invoked by uid 500); 29 Dec 2010 03:12:11 -0000 Delivered-To: apmail-incubator-chukwa-dev-archive@incubator.apache.org Received: (qmail 37330 invoked by uid 500); 29 Dec 2010 03:12:10 -0000 Mailing-List: contact chukwa-dev-help@incubator.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: chukwa-dev@incubator.apache.org Delivered-To: mailing list chukwa-dev@incubator.apache.org Received: (qmail 37296 invoked by uid 99); 29 Dec 2010 03:12:09 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 29 Dec 2010 03:12:09 +0000 X-ASF-Spam-Status: No, hits=-2000.0 required=10.0 tests=ALL_TRUSTED X-Spam-Check-By: apache.org Received: from [140.211.11.22] (HELO thor.apache.org) (140.211.11.22) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 29 Dec 2010 03:12:07 +0000 Received: from thor (localhost [127.0.0.1]) by thor.apache.org (8.13.8+Sun/8.13.8) with ESMTP id oBT3Bjrr004351 for ; Wed, 29 Dec 2010 03:11:45 GMT Message-ID: <31287032.53361293592305435.JavaMail.jira@thor> Date: Tue, 28 Dec 2010 22:11:45 -0500 (EST) From: "Eric Yang (JIRA)" To: chukwa-dev@incubator.apache.org Subject: [jira] Created: (CHUKWA-570) Create a meta data table in HBase to keep track of columns 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 Create a meta data table in HBase to keep track of columns ---------------------------------------------------------- Key: CHUKWA-570 URL: https://issues.apache.org/jira/browse/CHUKWA-570 Project: Chukwa Issue Type: New Feature Components: MR Data Processors Environment: Java 6, Mac OSX 10.6 Reporter: Eric Yang Assignee: Eric Yang Fix For: 0.5.0 HBase provides dynamic columns, but it is costly to do table scan to figure out all the columns at real time. For HICC to display all columns stored in HBase to web user interface, it would be better to cache the meta data in a small table. This jira is to implement a mapreduce job which scans for new columns for specified time ranges and deposit the column names into a chukwa meta data table. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.