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Posted to hdfs-issues@hadoop.apache.org by "Vinayakumar B (JIRA)" <ji...@apache.org> on 2014/06/04 09:59:03 UTC

[jira] [Commented] (HDFS-6466) Transfer edit log from primary cluster to mirror cluster synchronously

    [ https://issues.apache.org/jira/browse/HDFS-6466?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14017472#comment-14017472 ] 

Vinayakumar B commented on HDFS-6466:
-------------------------------------

Hi Dian,
Patch is looking good. But it will be still better if we divide the patch into multiple small patches logically 
For ex: 
 1. Deciding the state of the cluster based on configuration and starting corresponding services could be one patch.
 2. MirrorJournalManager and related changes( creating proxy, etc) which are required at primary cluster could be one patch.
 3. MirrorJournal and related changes, which is handling the journal requests at mirror cluster could be in another patch.

Any thoughts?

> Transfer edit log from primary cluster to mirror cluster synchronously
> ----------------------------------------------------------------------
>
>                 Key: HDFS-6466
>                 URL: https://issues.apache.org/jira/browse/HDFS-6466
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>    Affects Versions: 3.0.0
>            Reporter: Dian Fu
>            Assignee: Dian Fu
>             Fix For: 3.0.0
>
>         Attachments: HDFS-6466.1.patch, HDFS-6466.patch
>
>
> In sync mode of DR, the mirror clusters are treated as JournalManagers and the edit logs of primary cluster will be synchronously transferred to mirror clusters.



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