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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. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira