MapR 5.1 is at End of Life (EOL) and no longer supported. Please see the latest documentation. This documentation is not being updated.

5.1 Ecosystem
This guide contains a section for each open source project that MapR supports. You can learn how to install, configure, use, and integrate each project within the context of a MapR cluster.
- AsyncHBase
- Cascading
- Drill
- Flume
- HBase
- HCatalog
- Hive
  - Installing Hive
  - Upgrading Hive
    Complete the following steps to upgrade Hive with manual steps. If you installed Hive with the MapR Installer, use the latest version of the MapR Installer to perform the upgrade.
  - Getting Started with Hive
  - Configuring Hive
    - Configure Hive Directories
    - Use MySQL for the Hive Metastore
      The metadata for Hive tables and partitions are stored in the Hive Metastore. By default, the Hive Metastore stores all Hive metadata in an embedded Apache Derby database in MapR-FS. Derby only allows one connection at a time; if you want multiple concurrent Hive sessions, you can use MySQL for the Hive Metastore.
    - User Impersonation for Hive
    - Hive Security
  - Integrating Hive
  - Managing Hive Services
  - Connecting to Hive
  - Troubleshooting Hive
- HttpFS
- Hue
- Impala
- Mahout
- Myriad
- Oozie
- Pig
- OpenStack Sahara (Mitaka)
- Sentry
- Spark
- Sqoop
- Storm
- Third Party Solutions

User Impersonation for Hive

User impersonation enables Hive to submit jobs as a particular user. Without impersonation, Hive submits queries and hadoop commands as the user that started HiveServer2 and Hive Metastore. On a MapR cluster, this user is typically the mapr user or the user specified in the MAPR_USER environment variable.