Installing Apache Atlas
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In HDP-3.0+, Apache Atlas uses the JanusGraph graph database to store metadata objects. In earlier versions, Atlas used the Titan graph database for metadata storage. When upgrading to HDP-3.0 and higher versions, you must use a command-line migration tool to migrate the Atlas metadata from Titan to JanusGraph.

  1. Estimate the size of Atlas repository and the time it will take to export the Atlas metadata from HDP-2.x and import it into HDP-3.x.
  2. Use the Atlas metadata migration tool to export the Atlas metadata from HDP 2.x.
  3. Import the Atlas metadata into HDP 3.x.