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From "Suresh Srinivas (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-3092) Enable journal protocol based editlog streaming for standby namenode
Date Wed, 14 Mar 2012 13:44:38 GMT
Enable journal protocol based editlog streaming for standby namenode
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                 Key: HDFS-3092
                 URL: https://issues.apache.org/jira/browse/HDFS-3092
             Project: Hadoop HDFS
          Issue Type: Improvement
          Components: ha, name-node
    Affects Versions: 0.24.0, 0.23.3
            Reporter: Suresh Srinivas


Currently standby namenode relies on reading shared editlogs to stay current with the active
namenode, for namespace changes. BackupNode used streaming edits from active namenode for
doing the same. This jira is to explore using journal protocol based editlog streams for the
standby namenode. A daemon in standby will get the editlogs from the active and write it to
local edits. To begin with, the existing standby mechanism of reading from a file, will continue
to be used, instead of from shared edits, from the local edits.

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