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https://issues.apache.org/jira/browse/HBASE-2315?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12846959#action_12846959
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Flavio Paiva Junqueira commented on HBASE-2315:
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Hi Todd, Great points:
# We plan to have a mechanism to re-replicate the ledger fragments of a bookie;
some of our applications require it. There is a wiki page I had created with
some initial thoughts, but I need to update it:
"http://wiki.apache.org/hadoop/BookieRecoveryPage";. I also thought there was a
jira open about it already, but I couldn't find it, so I created a new one:
ZOOKEEPER-712.
# We currently don't have a notion of rack awareness, but it is a good idea and
not difficult to add. We just need to have a bookie adding that information to
its corresponding znode and use it during the selection of bookies upon
creating a leader. I have also opened a jira to add it: ZOOKEEPER-711.
On the documentation, please feel free to open a jira and mention all point
that you believe could be improved.
> BookKeeper for write-ahead logging
> ----------------------------------
>
> Key: HBASE-2315
> URL: https://issues.apache.org/jira/browse/HBASE-2315
> Project: Hadoop HBase
> Issue Type: New Feature
> Components: regionserver
> Reporter: Flavio Paiva Junqueira
> Attachments: bookkeeperOverview.pdf, HBASE-2315.patch,
> zookeeper-dev-bookkeeper.jar
>
>
> BookKeeper, a contrib of the ZooKeeper project, is a fault tolerant and high
> throughput write-ahead logging service. This issue provides an implementation
> of write-ahead logging for hbase using BookKeeper. Apart from expected
> throughput improvements, BookKeeper also has stronger durability guarantees
> compared to the implementation currently used by hbase.
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