hadoop-hdfs-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Tsz Wo (Nicholas), SZE (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-4078) Handle replication in snapshots
Date Fri, 19 Oct 2012 00:36:02 GMT
Tsz Wo (Nicholas), SZE created HDFS-4078:

             Summary: Handle replication in snapshots
                 Key: HDFS-4078
                 URL: https://issues.apache.org/jira/browse/HDFS-4078
             Project: Hadoop HDFS
          Issue Type: Sub-task
          Components: name-node
            Reporter: Tsz Wo (Nicholas), SZE
            Assignee: Tsz Wo (Nicholas), SZE

Without snapshots, file replication is the same as block replication.

With snapshot, the file replication R_o of the original file and the file replication R_s
of the snapshot file could possibly be different.  Since the blocks are shared between the
original file and the snapshot file, block replication is max(R_o, R_s).  If there are more
than one snapshots, block replication is the max file replication of the original file and
all snapshot files.

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

View raw message