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# Changes in This Release for Oracle Big Data Appliance

This preface describes the changes in Oracle Big Data Appliance 4.0.

## Changes in Oracle Big Data Appliance Release 4 (4.0)

The following are changes in Oracle Big Data Appliance release 4 (4.0):

New Features

- Oracle Big Data SQL 1.0.0

  Oracle Big Data SQL supports queries against vast amounts of big data stored in multiple data sources, including HDFS and Hive. You can view and analyze data from various data stores together, as if it were all stored in an Oracle database. Support for Oracle Big Data SQL includes the following new features in Oracle Database:

  - `DBMS_HADOOP` PL/SQL package

  - Hive static data dictionary views

  - Access drivers for Hadoop and Hive

  Oracle Big Data SQL is an installation option, which you can specify using the Oracle Big Data Appliance Configuration Generation Utility.

  You can monitor and manage Oracle Big Data SQL using the `bdacli` command and Cloudera Manager.

  See "bdacli" and Oracle Big Data Appliance Software User's Guide.

- Service Migration

  The `bdacli` utility can migrate services from a failing critical node to a healthy noncritical node. It can also remove failing critical and noncritical nodes from a cluster, and restore them to the cluster after repairs. See "bdacli" and Oracle Big Data Appliance Software User's Guide.

- Software Upgrades

  - Cloudera's Distribution including Apache Hadoop 5.1.0

  - Cloudera Manager 5.1.1

  - Perfect Balance 2.2.0

  - Oracle Data Integrator Agent 12.1.3.0 (for Oracle Data Integrator Application Adapter for Hadoop)

  See Oracle Big Data Appliance Software User's Guide.

- Oracle NoSQL Database Zone Support

  The Oracle Big Data Appliance Configuration Generation Utility and the `mammoth -e` command support multiple zones on Oracle NoSQL Database clusters. You can add nodes to an existing zone, or create a new primary or secondary zones.

  See "Oracle NoSQL Configuration" and "Mammoth Software Installation and Configuration Utility".

- Multiple Rack Clusters

  You can now install a cluster on multiple racks using one cluster_name-config.json file.