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From "Eric Yang (JIRA)" <j...@apache.org>
Subject [jira] Created: (CHUKWA-570) Create a meta data table in HBase to keep track of columns
Date Wed, 29 Dec 2010 03:11:45 GMT
Create a meta data table in HBase to keep track of columns
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                 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.

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