[
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
