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---
features:
- |
An optional configuration group ``placement_database`` can be used in
nova.conf to configure a separate database for use with the placement
API.
If ``placement_database.connection`` has a value then the
``placement_database`` configuration group will be used to configure a
separate placement database, including using ``connection`` to identify the
target database. That database will have a schema that is a replica of all
the tables used in the API database. The new database schema will be
created and synchronized when the ``nova-manage api_db sync`` command is
run.
When the ``placement_database.connection`` setting is omitted the existing
settings for the ``api_database`` will be used for hosting placement data.
Setting ``placement_database.connection`` and calling
``nova-manage api_db sync`` will only create tables. No data will be
migrated. In an existing OpenStack deployment, if there is existing
placement data in the ``nova_api`` database this will not be copied. It is
up to the deployment to manually replicate that data in a fashion that
works best for the environment.
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