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# Changes in This Release for Oracle Big Data Appliance Owner's Guide

This preface contains:

- Changes in Oracle Big Data Appliance Release 3 (3.1)

- Changes in Oracle Big Data Appliance Release 3 (3.0)

## Changes in Oracle Big Data Appliance Release 3 (3.1)

The following are changes in Oracle Big Data Appliance release 3 (3.1):

New Features

- Software Upgrades

  - Cloudera's Distribution including Apache Hadoop and Cloudera Manager are upgraded to 5.1.0.

  - Perfect Balance is upgraded to 2.1.0.

  See Oracle Big Data Appliance Software User's Guide.

- Multirack Clusters

  You can create one parameter file for a multirack cluster and use it to deploy the software on all racks. When defining the cluster, you simply enter the IP addresses for nodes in different racks. See "Define Clusters Page".

  Some critical services run on different nodes in a multirack cluster. The critical services that run on nodes 2 and 4 of a single-rack cluster are relocated to nodes 1 and 2 of the second rack. The services that run on node 3 of a single-rack cluster are relocated to node 2 of the first rack. See Oracle Big Data Appliance Software User's Guide.

- Command Line Interface

  The Oracle Big Data Appliance Command-Line Interface (`bdacli`) returns information about a rack, cluster, server, and the InfiniBand network. It also calls the `mammoth-reconfig` utility to add and remove optional services. This version provides new functionality and some syntax changes.

  See "bdacli".

## Changes in Oracle Big Data Appliance Release 3 (3.0)

The following are changes in Oracle Big Data Appliance release 3 (3.0):

New Features

- Software Upgrades

  - Cloudera 5 Enterprise includes Cloudera's Distribution including Apache Hadoop (CDH5), Cloudera Manager, Impala, Navigator, Search, and Apache Spark.

  - Yet Another Resource Negotiator (YARN) is the default version of MapReduce. MapReduce 1 programs might require recompilation. MRv1 is still supported for backward compatibility.

  - Oracle NoSQL Database 3.0.5 is installed. This version supports user authentication and secure network traffic.

  - Apache Spark is installed but not configured.

  - Cloudera Backup and Disaster Recovery features are subsumed into Cloudera Manager.

  See "Upgrading the Software on Oracle Big Data Appliance" and Oracle Big Data Appliance Software User's Guide.

- Reconfiguration Support

  The Mammoth Reconfiguration utility can add and remove Oracle Big Data Connectors, Oracle Enterprise Manager, Oracle Audit Vault and Database Firewall, Apache Sentry, network encryption, and disk encryption. It can also add support for Kerberos authentication, but removal is a manual procedure. See "Changing the Configuration of Optional Software".

- Command Line Interface

  The Oracle Big Data Appliance Command-Line Interface (`bdacli`) returns information about a rack, cluster, server, and the InfiniBand network. It also calls the `mammoth-reconfig` utility to add and remove optional services.

  See "bdacli".

Other Changes

The following are additional changes in the release:

- Mammoth Utility

  If Mammoth fails, it generates a diagnostic zip file that you can upload to My Oracle Support.

  The syntax of the `-e` option is simplified.

  See "Mammoth Options".