hadoop-hdfs-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Brandon Li (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-3300) stream the edit segments to NameNode when NameNode starts up
Date Thu, 19 Apr 2012 00:10:40 GMT
stream the edit segments to NameNode when NameNode starts up
------------------------------------------------------------

                 Key: HDFS-3300
                 URL: https://issues.apache.org/jira/browse/HDFS-3300
             Project: Hadoop HDFS
          Issue Type: Sub-task
            Reporter: Brandon Li


Edit logs are saved on Journal daemon. When NameNode starts, it loads the latest image file
and then streams the edit logs from an active Journal daemon. 

Currently we are using http to transfer edit files between two journal daemons/nodes or between
a journal daemon and a NameNode. To get edit file from Journal daemon, the NameNode has to
download it first and then read it from the disk.

To avoid the slow start-up time, NameNode should be enhance to read the http data stream and
update its in memory name space instead of saving the streamed data on disk first.


--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira

        

Mime
View raw message