hadoop-hdfs-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Colin Patrick McCabe (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-3947) If there are multiple edit logs with the same fstime, Recovery Mode should load a different one than the normal loading process
Date Tue, 18 Sep 2012 00:49:07 GMT
Colin Patrick McCabe created HDFS-3947:
------------------------------------------

             Summary: If there are multiple edit logs with the same fstime, Recovery Mode
should load a different one than the normal loading process
                 Key: HDFS-3947
                 URL: https://issues.apache.org/jira/browse/HDFS-3947
             Project: Hadoop HDFS
          Issue Type: Improvement
    Affects Versions: 1.2.0
            Reporter: Colin Patrick McCabe
            Assignee: Colin Patrick McCabe
            Priority: Minor


If there are multiple edit logs with the same {{fstime}}, Recovery Mode should load a different
one than the normal loading process.  This will protect against many common kinds of corruption
which affect only one edit log directory.  For example, most I/O errors would fall into this
category.

This improvement is not necessary in branch-2 and later branches because in those branches,
we have edit log failover (See HDFS-3049).  However, this is an extremely simple and useful
thing we can do to make Recovery Mode more helpful in branch-1.

--
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

Mime
View raw message