(v24) Manage the HDFS Connector

Manage the HDFS Connector

Composer offers connection to Cloudera’s open source Hadoop platform - Cloudera Distributed Hadoop (CDH)*. CDH provides unified batch processing, interactive SQL, interactive search, and role-based access controls. In addition, it offers enterprise-grade continuous availability. Specifically, Composer connects to CDH’s fault‐tolerant storage system called the Hadoop Distributed File System (HDFS).

The Composer HDFS connector uses its own embedded Apache Spark functionality. It supports Apache Spark 2.2 in its implementation.

By default, the HDFS connector is not included with Composer. You or your administrator need to download and enable it before configuring the connector.

After setting up the connector, create data sources that specify the necessary connection information and identify the data you want to use. See Manage Data Sources for more information. After you set up your data sources, create dashboards and visuals from from the data in these data sources. See Create Dashboards.

Feature Support

Connector support for specific features is shown in the following table.

Key: Y - Supported; N - Not Supported; N/A - not applicable

Feature	Supported?
Admin-Defined Functions	Y
Box Plots	Y
Custom SQL Queries	Y
Derived Fields (Row-Level Expressions)	Y
Distinct Counts	Y
Fast Distinct Values	N/A
Group By Multiple Fields	Y
Group By Time	Y
Group By UNIX Time	Y
Histogram Floating Point Values	Y
Histograms	Y
Kerberos Authentication	Y
Last Value	Y
Live Mode and Playback	Y
Multivalued Fields	N/A
Nested Fields	N/A
Partitions	N/A
Pushdown Joins for Fusion Data Sources	N
Schemas	Y
Text Search	N/A
TLS	N
User Delegation	N
Wildcard Filters	Y
Wildcard Filters, Case-Insensitive Mode	Y
Wildcard Filters, Case-Sensitive Mode	Y