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https://issues.apache.org/jira/browse/HDFS-1799?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13029624#comment-13029624
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Jitendra Nath Pandey commented on HDFS-1799:
--------------------------------------------

> Will StorageDirectory ever be removed from JournalManager's interface? It 
> seems like > an implementation detail of FileJournalManager. We should punt 
> this to a later change > (eg HDFS-1580) but, as is, JournalManager is overly 
> abstract if it doesn't hide 
> storage directories.

I agree with Eli that StorageDirectory should be an implementation detail of 
FileJournalManager. Can we just add FileJournalManager in this patch and leave 
out JournalManager interface because more discussion is required for generic 
interface still?

> Refactor log rolling and filename management out of FSEditLog
> -------------------------------------------------------------
>
>                 Key: HDFS-1799
>                 URL: https://issues.apache.org/jira/browse/HDFS-1799
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>    Affects Versions: Edit log branch (HDFS-1073)
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>             Fix For: Edit log branch (HDFS-1073)
>
>         Attachments: 0001-Added-state-management-to-FSEditLog.patch, 
> 0002-Standardised-error-pattern.patch, 
> 0003-Add-JournalFactory-and-move-divert-revert-out-of-FSE.patch, 
> HDFS-1799-all.diff, hdfs-1799-alternate-design.txt, hdfs-1799.txt, 
> hdfs-1799.txt, hdfs-1799.txt, hdfs-1799.txt, hdfs-1799.txt
>
>
> This is somewhat similar to HDFS-1580, but less ambitious. While that JIRA 
> focuses on pluggability, this task is simply the minimum needed for HDFS-1073:
> - Refactor the filename-specific code for rolling, diverting, and reverting 
> log streams out of FSEditLog into a new class
> - Clean up the related code in FSEditLog a bit
> Notably, this JIRA is going to temporarily break the BackupNode. I plan to 
> circle back on the BackupNode later on this branch.

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