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

Mime
View raw message