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https://issues.apache.org/jira/browse/HADOOP-5189?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12698804#action_12698804
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Luca Telloli commented on HADOOP-5189:
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Ben, the current patch needs a storage directory to retrieve the edits. In
previous patches I kept this but starting from this one I"m not using storage
directories anymore. Thus, when Iogging on BK, there won't be any storage
directory available when reading from bookkeeper so nothing to read.
In a future version I'll get rid of the requirement of having a storage
directory to restore edits from, so possibly any logging system should be ok as
soon as a stream to read from is provided.
> Integration with BookKeeper logging system
> ------------------------------------------
>
> Key: HADOOP-5189
> URL: https://issues.apache.org/jira/browse/HADOOP-5189
> Project: Hadoop Core
> Issue Type: New Feature
> Components: dfs
> Reporter: Luca Telloli
> Fix For: 0.21.0
>
> Attachments: create.png, HADOOP-5189-trunk-preview.patch,
> HADOOP-5189-trunk-preview.patch, HADOOP-5189-trunk-preview.patch,
> HADOOP-5189.patch, 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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