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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 2 (2.1)

- Changes in Oracle Big Data Appliance Release 2 (2.0.1)

- Changes in Oracle Big Data Appliance Release 2 (2.0)

## Changes in Oracle Big Data Appliance Release 2 (2.1)

The following are changes in Oracle Big Data Appliance Owner's Guide for Oracle Big Data Appliance release 2 (2.1).

### New Features

- Starter Rack and Upgrade Kit

  Oracle Big Data Appliance is now available as a starter rack with six servers instead of the full rack of 18 servers. An upgrade kit expands the starter rack to 12 servers, and then to 18 servers.

  See "Oracle Big Data Appliance Rack Components."

- Multiple Clusters in a Rack

  You can now configure a full Oracle Big Data Appliance rack with multiple Hadoop clusters. This support affects the Oracle Big Data Appliance Configuration Worksheets, the network configuration, and the Mammoth software installation.

  See Chapter 7.

## Changes in Oracle Big Data Appliance Release 2 (2.0.1)

The following are changes in Oracle Big Data Appliance Owner's Guide for Oracle Big Data Appliance release 2 (2.0.1).

### New Features

- Mammoth Upgrade Support

  The Mammoth Utility supports upgrades from software version 1.1 to 2.0.1.

  See "Upgrading the Software on Oracle Big Data Appliance".

- Oracle Enterprise Manager Support

  Agents run on Oracle Big Data Appliance to support the Enterprise Manager system monitoring plug-in.

  See "Software Configuration."

## Changes in Oracle Big Data Appliance Release 2 (2.0)

The following are changes in Oracle Big Data Appliance Owner's Guide for Oracle Big Data Appliance release 2 (2.0).

### New Features

- Oracle Big Data Appliance X3-2

  Oracle Big Data Appliance racks are now shipped with a different hardware configuration named Oracle Big Data Appliance X3-2. The Sun Server X3-2L-based racks supersede the Sun Fire X4270 M2-based racks. All versions of the Oracle Big Data Appliance software run on both hardware configurations.

  See "Oracle Big Data Appliance Rack Components"

- Cloudera's Distribution including Apache Hadoop Version 4 (CDH4)

  CDH4 replaces CDH3. CDH4 provides automatic failover of the NameNode and uses different services than CDH3.

  See "Port Assignments for Oracle Big Data Appliance Software" for the ports used by CDH4.

  See Oracle Big Data Appliance Software User's Guide for more information about using CDH4.