The Security Guide was extensively updated to reflect new Ranger and Knox features for HDP 2.5. This new content includes: Ranger-Atlas integration using tag-based services and policies. Tags and policy evaluation. Atlas Ranger Authorization plugin. Ranger-Hive row-filtering and column-masking. Migration script to convert from Audit-to-DB to Audit-to-Solr. Ranger Reports page improvements. Knox SSO. Ranger Usersync enhancements. Ranger High Availability (added to Apache Hadoop High Availability guide). Updates to reflect the new Ambari Infra Solr instance. The Data Governance guide was completely rewritten for HDP 2.5 to reflect new Apache Atlas capabilities, along with a new Atlas UI. This new content includes: Atlas-Ranger integration and Tag synch. Installation and Configuration. Configuring Atlas Security. Configuring Atlas High Availability. Searching and viewing Atlas Assets. Working with Atlas tags. Enabling and Managing the Atlas Business Taxonomy (Technical Preview). Updated REST API resources. ... View more