Ambari requires a relational database to store information about the cluster configuration and topology. If you install HDP Stack with Hive or Oozie, they also require a relational database. The following table outlines these database requirements:
Component | Description |
|---|---|
Ambari | By default, will install an instance of PostgreSQL on the Ambari Server host. Optionally, to use an existing instance of PostgreSQL, MySQL or Oracle. For further information, see Using Non-Default Databases - Ambari. |
Hive | By default (on RHEL/CentOS/Oracle Linux 6), Ambari will install an instance of MySQL on the Hive Metastore host. Otherwise, you need to use an existing instance of PostgreSQL, MySQL or Oracle. See Using Non-Default Databases - Hive for more information. |
Oozie | By default, Ambari will install an instance of Derby on the Oozie Server host. Optionally, to use an existing instance of PostgreSQL, MySQL or Oracle, see Using Non-Default Databases - Oozie for more information. |
![[Important]](../common/images/admon/important.png) | Important |
|---|---|
For the Ambari database, if you use an existing Oracle database, make sure the Oracle listener runs on a port other than 8080 to avoid conflict with the default Ambari port. Alternatively, refer to the Ambari Reference Guide for information on Changing the Default Ambari Server Port. |
