Standby Datacenter Idle Resource –Single Data Center Ingest –Disaster Recovery Only One way synchronization –DistCp Error Prone –Clusters can diverge over time Difficult to scale > 2 Data Centers –Complexity of sharing data increases Active / Active DR Resource Available –Ingest at all Data Centers –Run Jobs in both Data Centers Replication is Multi-Directional –active/active Absolute Consistency –Single HDFS spans locations 'N' Data Center support –Global HDFS allows appropriate data to be shared Breaking Away from Active/Passive What's in a Data Center
{}