hadoop-hdfs-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Brandon Li (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-3201) Implement Journal reader for reading transactions from local edits log or remote Journal node
Date Sat, 07 Apr 2012 04:55:22 GMT

    [ https://issues.apache.org/jira/browse/HDFS-3201?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13249165#comment-13249165
] 

Brandon Li commented on HDFS-3201:
----------------------------------

After a new(or a rejoining) JournalNode joins the cluster and starts accepting streamed transactions,
it may not have all the previously finalized edit segments in its local storage directory.


To synchronize this JournalNode (J1) with other active JournalNode, this JournalNode needs
to copy the finalized edit segments from another JournalNode (J2) which has all the finalized
edit segments.

The remote-reader is used by J1 to get edit segments from J2. The local-reader is used by
J2 to read edit segment from its local storage directory.
                
> Implement Journal reader for reading transactions from local edits log or remote Journal
node
> ---------------------------------------------------------------------------------------------
>
>                 Key: HDFS-3201
>                 URL: https://issues.apache.org/jira/browse/HDFS-3201
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: ha, name-node
>            Reporter: Brandon Li
>            Assignee: Brandon Li
>


--
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