Creating a database on Ozone for Cloudera Data Warehouse Private Cloud Virtual Warehouses
Learn how to create a database on Ozone storage that can be used by Cloudera Data
Warehouse (CDW) Private Cloud Hive or Impala Virtual Warehouses.
By default, the Hive metastore for Database Catalogs on CDW Private Cloud points to
HDFS, but you can configure the Database Catalog to point to Ozone storage
instead by using the following steps. These steps change the default Hive metastore
location to Ozone.
Before you re-configure the Database Catalog settings, make sure there are no running
Virtual Warehouses associated with it. Either the Database Catalog has
no associated Virtual Warehouses or you have suspended all the Virtual Warehouses
associated with it.
Use the following steps to change the Database Catalog setting:
From the Management Console Private Cloud home page left menu, navigate
to Data
Warehouse > Overview.
In the Database Catalog tile, click the edit icon .
In the Database Catalogs detail page, click the
Metastore tab, and select
hive-site from the drop-down list on the left side of
the tabbed page.
Search for the following configuration properties and update them to
Ozone file system paths, which start with o3fs:
hive.metastore.warehouse.dir
hive.metastore.warehouse.external.dir
Here is an example of these properties set for the
test-env-datalake-default Database Catalog:
The example values in the screenshot show the Hive warehouse locations in
Ozone (set at a directory level) where Hive stores the tables.
bucket1.volume1.ozone1 represents the Ozone volume,
‘est-env-datalake-default represents the Ozone bucket, and
managed and external are directories
where Hive stores the managed and external tables.
Click Apply in the upper right corner of the page to
save your settings. The Database Catalog begins updating.
After the Database Catalog has finished updating, perform one of the following
actions to get started working with a Virtual Warehouse:
Restart any associated Virtual Warehouses that you suspended before updating the
Database Catalog properties by clicking the re-start icon in the upper right corner
of the Virtual Warehouse tile on the Overview page.
Use Hue to create a database with your Virtual Warehouse. For details, see
Querying data.
After configuring the Database Catalog's Hive metastore to point to Ozone, you can
create databases on Ozone with either an Impala or a Hive Virtual Warehouse.