hdfs_path refers to any hdfs location (file,directory,symlink etc.,). Since hdfs_path is already registered in Atlas, you can write a hook in hdfs to capture metadata change events and construct the json as per hdfs_path type definition and POST it to Atlas. Also , you can create your own custom type and register it. Since you are writing own hook libraries for hdfs , your hook library can construct the json to use the existing type system in 0.7 or your custom type you registered. ... View more

HBase is the preferred metadata store for Atlas as of now. BerkeleyDB can also be used. ... View more

Atlas captures Hive and falcon metadata once Hive and falcon are configured with Atlas hook. Regarding hive,all entity operations are captured by Atlas (create,drop,alter etc). For falcon, Atlas captures only submit falcon entity as of now. When you delete a falcon entity , the falcon hook doesn't send any notification to Atlas. For more technical details please refer http://atlas.incubator.apache.org/Bridge-Falcon.html ... View more