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https://issues.apache.org/jira/browse/HBASE-2315?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13412065#comment-13412065
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Flavio Junqueira commented on HBASE-2315:
-----------------------------------------
Hi Ted, fs is part of the issue I was discussing before. We don't have a
filesystem implementation for bookkeeper, so we can't use the filesystem
instance passed.
About the reader and the writer, I was configuring them in the hbase-default
configuration file:
{noformat}
<property>
<name>hbase.regionserver.hlog.reader.impl</name>
<value>org.apache.hadoop.hbase.regionserver.wal.BookKeeperLogReader</value>
<description>The HLog file reader implementation.</description>
</property>
<property>
<name>hbase.regionserver.hlog.writer.impl</name>
<value>org.apache.hadoop.hbase.regionserver.wal.BookKeeperLogWriter</value>
<description>The HLog file writer implementation.</description>
</property>
{noformat}
I assumed previously that HLog was instantiated elsewhere.
> BookKeeper for write-ahead logging
> ----------------------------------
>
> Key: HBASE-2315
> URL: https://issues.apache.org/jira/browse/HBASE-2315
> Project: HBase
> Issue Type: New Feature
> Components: regionserver
> Reporter: Flavio Junqueira
> Attachments: HBASE-2315.patch, bookkeeperOverview.pdf,
> 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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