Cloudera Engineering Blog

Big Data best practices, how-to's, and internals from Cloudera Engineering and the community


Inside Cloudera Director

With Cloudera Director, cloud deployments of Apache Hadoop are now as enterprise-ready as on-premise ones. Here’s the technology behind it.

As part of the recent Cloudera Enterprise 5.2 release, we unveiled Cloudera Director, a new product that delivers enterprise-class, self-service interaction with Hadoop clusters in cloud environments. (Cloudera Director is free to download and use, but commercial support requires a Cloudera Enterprise subscription.) It provides a centralized administrative view for cloud deployments and lets end users provision and scale clusters themselves using automated, repeatable, managed processes. To summarize, the same enterprise-grade capabilities that are available with on-premise deployments are now also available for cloud deployments. (For an overview of and motivation for Cloudera Director, please check out this blog post.)

How-to: Write Apache Hadoop Applications on OpenShift with Kite SDK

The combination of OpenShift and Kite SDK turns out to be an effective one for developing and testing Apache Hadoop applications.

At Cloudera, our engineers develop a variety of applications on top of Hadoop to solve our own data needs (here and here). More recently, we’ve started to look at streamlining our development process by using a PaaS (Platform-as-a-Service) for some of these applications. Having single-click deployment and updates to consistent development environments lets us onboard new developers more quickly, and helps ensure that code is written and tested along patterns that will ensure high quality.

New in CDH 5.2: New Security App and More in Hue

Thanks to new improvements in Hue, CDH 5.2 offers the best GUI yet for using Hadoop.

CDH 5.2 includes important new usability functionality via Hue, the open source GUI that makes Apache Hadoop easy to use. In addition to shipping a brand-new app for managing security permissions, this release is particularly feature-packed, and is becoming a great complement to BI tools from Cloudera partners like Tableau, MicroStrategy, and Zoomdata because a more usable Hadoop translates into better BI overall across your organization! 

New in CDH 5.2: Impala Authentication with LDAP and Kerberos

Impala authentication can now be handled by a combination of LDAP and Kerberos. Here’s why, and how.

Impala, the open source analytic database for Apache Hadoop, supports authentication—the act of proving you are who you say you are—using both Kerberos and LDAP. Kerberos has been supported since release 1.0, LDAP support was added more recently, and with CDH 5.2, you can use both at the same time.

New in CDH 5.2: Apache Sentry Delegated GRANT and REVOKE

This new feature, jointly developed by Cloudera and Intel engineers, makes management of role-based security much easier in Apache Hive, Impala, and Hue.

Apache Sentry (incubating) provides centralized authorization for services and applications in the Apache Hadoop ecosystem, allowing administrators to set up granular, role-based protection on resources, and to review them in one place. Previously, Sentry only designated administrators to GRANT and REVOKE privileges on an authorizable object. In Apache Sentry 1.5.0 (shipping inside CDH 5.2), we have implemented a new feature (SENTRY-327) that allows admin users to delegate the GRANT privilege to other users using WITH GRANT OPTION. If a user has the GRANT OPTION privilege on a specific resource, the user can now grant the GRANT privilege to other users on the same resource. Apache Hive, Impala, and Hue have all been updated to take advantage of this new Sentry functionality.

New in CDH 5.2: More SQL Functionality and Compatibility for Impala 2.0

Impala 2.0 is the most SQL-complete/SQL-compatible release yet.

As we reported in the most recent roadmap update (“What’s Next for Impala: Focus on Advanced SQL Functionality”), more complete SQL functionality (and better SQL compatibility with other vendor extensions) is a major theme in Impala 2.0.

Introducing Cloudera Labs: An Open Look into Cloudera Engineering R&D

Cloudera Labs contains ecosystem innovations that one day may bring developers more functionality or productivity in CDH.

Since its inception, one of the defining characteristics of Apache Hadoop has been its ability to evolve/reinvent and thrive at the same time. For example, two years ago, nobody could have predicted that the formative MapReduce engine, one of the cornerstones of “original” Hadoop, would be marginalized or even replaced. Yet today, that appears to be happening via Apache Spark, with Hadoop becoming the stronger for it. Similarly, we’ve seen other relatively new components, like Impala, Apache Parquet (incubating), and Apache Sentry (also incubating), become widely adopted in relatively short order.

Cloudera Enterprise 5.2 is Released

Cloudera Enterprise 5.2 contains new functionality for security, cloud deployments, and real-time architectures, and support for the latest open source component releases and partner technologies.

We’re pleased to announce the release of Cloudera Enterprise 5.2 (comprising CDH 5.2, Cloudera Manager 5.2, Cloudera Director 1.0, and Cloudera Navigator 2.1).

How SQOOP-1272 Can Help You Move Big Data from Mainframe to Apache Hadoop

Thanks to M. Asokan, Chief Architect at Syncsort, for the guest post below.

Apache Sqoop provides a framework to move data between HDFS and relational databases in a parallel fashion using Hadoop’s MR framework. As Hadoop becomes more popular in enterprises, there is a growing need to move data from non-relational sources like mainframe datasets to Hadoop. Following are possible reasons for this:

Using Impala, Amazon EMR, and Tableau to Analyze and Visualize Data

Our thanks to AWS Solutions Architect Rahul Bhartia for allowing us to republish his post below.

Apache Hadoop provides a great ecosystem of tools for extracting value from data in various formats and sizes. Originally focused on large-batch processing with tools like MapReduce, Apache Pig, and Apache Hive, Hadoop now provides many tools for running interactive queries on your data, such as Impala, Drill, and Presto. This post shows you how to use Amazon Elastic MapReduce (Amazon EMR) to analyze a data set available on Amazon Simple Storage Service (Amazon S3) and then use Tableau with Impala to visualize the data.

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