Build Cassandra Visualizations in Tableau Online

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CData Connect Server


Use CData Connect Server to create a virtual SQL Server Database for Cassandra data and build visualizations in Tableau Online.

Tableau Online is an analytics platform fully hosted in the cloud. When paired with CData Connect Server, you get instant, cloud-to-cloud access to Cassandra data for visualizations, dashboards, and more. This article shows how to create a virtual database for Cassandra and build visualizations from Cassandra data in Tableau Online.

CData Connect Server provides a pure SQL Server, cloud-to-cloud interface for Cassandra, allowing you to easily build visualizations from live Cassandra data in Tableau Online without installing connectors or publishing worksheets and data sources from Tableau Desktop. As you build visualizations, Tableau Online generates SQL queries to gather data. Using optimized data processing out of the box, CData Connect Server pushes all supported SQL operations (filters, JOINs, etc) directly to Cassandra, leveraging server-side processing to quickly return Cassandra data.

Create a Virtual SQL Server Database for Cassandra Data

CData Connect Server uses a straightforward, point-and-click interface to connect to data sources and generate APIs.

  1. Login to Connect Server and click Databases.
  2. Select "Cassandra" from Available Data Sources.
  3. Enter the necessary authentication properties to connect to Cassandra.

    Set the Server, Port, and Database connection properties to connect to Cassandra. Additionally, to use internal authentication set the User and Password connection properties.

  4. Click Test Database.
  5. Click Privileges -> Add and add the new user (or an existing user) with the appropriate permissions.

With the virtual database created, you are ready to build visualizations in Tableau Online.

Visualize Live Cassandra Data in Tableau Online

The steps below outline creating a new data source in Tableau Online based on the virtual Cassandra database in Connect Server and building a simple visualization from the data.

  1. Log into Tableau Online, select a project, and create a new workbook.
  2. In the new workbook, choose the Microsoft SQL Server Connector from the data wizard and fill in the values for your Connect Server instance.
    NOTE: Be sure to check the "Require SSL" checkbox.
  3. Select your newly created database and the table(s) you wish to visualize (defining relationships for JOINed tables as needed).
  4. Select Dimensions and Measures and configure your visualization.

SQL Access to Cassandra Data from Applications

At this point, you have a direct connection to live Cassandra data from your Tableau Online workbook. You can create new visualizations, build dashboards, and more, with no need to publish data sources and workbooks from Tableau Desktop. For more information on gaining SQL access to data from more than 100 SaaS, Big Data, and NoSQL sources from cloud applications like Tableau Online, refer to our Connect Server page.