© Hortonworks Inc. 2011
Major Changes for 1.0 (contd)
• Availability: Region Replicas
• Multiple RegionServers host a Region
① One is “primary”, others are “replicas”
② Only primary accepts writes
• Baby step toward quorum reads, writes
• Plumbing is all there, OFF by default
• http://issues.apache.org/jira/browse/HBASE-10070
• http://issues.apache.org/jira/browse/HBASE-11183
• http://www.slideshare.net/HBaseCon/features-session-1
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Architecting the Future of Big Data
