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From "Raghu Angadi (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-5189) Integration with BookKeeper logging system
Date Tue, 10 Feb 2009 00:37:59 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-5189?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12672084#action_12672084
] 

Raghu Angadi commented on HADOOP-5189:
--------------------------------------

Does this patch include HADOOP-5188 as well? There seem to be a lot of 'while space only'
changes in the patch.

If the records are written asynchronously to book keeper, is the ordering controlled explicitly
(by the NameNode side Bookkeeper client)?

I agree interface should allow edit log implementation to do decide how to wait for sync,
but ordering is probably a NameNode level requirement.

> Integration with BookKeeper logging system
> ------------------------------------------
>
>                 Key: HADOOP-5189
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5189
>             Project: Hadoop Core
>          Issue Type: New Feature
>    Affects Versions: 0.19.0
>            Reporter: Luca Telloli
>         Attachments: create.png, HADOOP-5189.patch
>
>
> BookKeeper is a system to reliably log streams of records (https://issues.apache.org/jira/browse/ZOOKEEPER-276).
The NameNode is a natural target for such a system for being the metadata repository of the
entire file system for HDFS. 

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