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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 (2.2.1)

- Changes in Oracle Big Data Appliance Release 2 (2.2)

- 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 (2.2.1)

The following are changes in Oracle Big Data Appliance release 2 (2.2.1):

New Features

- One-Off Patch Installation Support

  The Mammoth Utility now supports one-off patching. See "Installing a One-Off Patch."

- Oracle Enterprise Manager System Monitoring Plug-in

  The Mammoth Utility provides additional support for deploying Enterprise Manager agents on Oracle Big Data Appliance.

  See "Mammoth Installation Steps."

  The Enterprise Manager command-line utility (`emcli`) is installed on Oracle Big Data Appliance.

  See the Oracle Big Data Appliance Software User's Guide.

- Upgraded Software Versions

  Java HotSpot Virtual Machine 6 Update 51 and Cloudera Manager Enterprise 4.6.3 are installed with this release.

  See the Oracle Big Data Appliance Software User's Guide.

## Changes in Oracle Big Data Appliance Release 2 (2.2)

The following are changes in Oracle Big Data Appliance release 2 (2.2).

New Features

- Separate Clusters for Oracle NoSQL Database

  HDFS and Oracle NoSQL Database do not share a cluster. Clusters are dedicated to either CDH or Oracle NoSQL Database. To upgrade a 2.1 or earlier cluster, you must first remove Oracle NoSQL Database. See "Upgrading the Software on Oracle Big Data Appliance."

- Multiple Clusters in One Rack You can configure a rack with multiple clusters in several different configurations.

- Job Tracker High Availability

  Clusters support two Job Trackers to ensure that one is always up and running. To support this change, some software services now run on different nodes in the cluster.

  See Oracle Big Data Appliance Software User's Guide.

- Perfect Balance

  Perfect Balance is a new tool for improving the performance of some MapReduce jobs.

  See Oracle Big Data Appliance Software User's Guide.

### Other Changes

- The location of some services has changed and vary slightly between starter racks, full racks, and multiple-rack clusters.

  - JobTrackers and failover controllers run one node03 and node04.

  - ZooKeeper is configured with servers running on node01, node02, and node03.

  - Oozie is configured with a server running on node04.

  See Also:

  Oracle Big Data Appliance Software User's Guide for more detailed information about the version 2.2 software.

## 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 In-Rack 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 a second upgrade kit expands it to 18 servers.

  See "Oracle Big Data Appliance Rack Components" and "Oracle Big Data Appliance Rack Layout."

- Multiple Clusters in a Rack

  You can now configure a full Oracle Big Data Appliance rack with multiple Hadoop clusters. The smallest cluster size is six servers. Larger clusters must have multiples of three servers.

  This support affects the Oracle Big Data Appliance Configuration Worksheets, the network configuration, and the Mammoth software installation.

  See Chapter 7.

- Cloudera Software Upgrade

  Mammoth 2.2.0 installs Cloudera's Distribution including Apache Hadoop (CDH) 4.3.0 and Cloudera Manager 4.6.0. Cloudera Manager manages Hive, so you must now use Cloudera Manager to start, stop, and configure Hive.

  You can upgrade from Oracle Big Data Appliance 2.1, 2.0, or 1.1 software.

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

- Oracle NoSQL Database Enterprise Edition

  If you have a license, you can have Mammoth install Oracle NoSQL Database Enterprise Edition instead of the Community Edition.

  See "Software Configuration."

- The `dcli` utility uses the Ethernet IP addresses that are stored in the BdaDeploy.json and BdaShip.json files. The rack-hosts-infiniband file is obsolete.

  See Chapter 13.

### Other Changes

- The location of some services has changed:

  - Cloudera Manager runs on node03.

  - MySQL Database master runs on node03, and the backup database runs on node02.

  - The directory mounted on all nodes of a cluster is exported from node03.

## 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.