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