Category Archives: Guest

How-to: Run Apache Mesos on CDH

Categories: CDH Cloudera Manager Guest Ops and DevOps

Big Industries, Cloudera systems integration and reseller partner for Belgium and Luxembourg, has developed an integration of Apache Mesos and CDH that can be deployed and managed through Cloudera Manager. In this post, Big Industries’ Rob Gibbon explains the benefits of deploying Mesos on your cluster and walks you through the process of setting it up.

[Editor’s Note: Mesos integration is not currently supported by Cloudera, thus the setup described below is not recommended for production use.]

Apache Mesos is a distributed,

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How Apache Spark, Scala, and Functional Programming Made Hard Problems Easy at Barclays

Categories: Guest Spark Use Case

Thanks to Barclays employees Sam Savage, VP Data Science, and Harry Powell, Head of Advanced Analytics, for the guest post below about the Barclays use case for Apache Spark and its Scala API.

At Barclays, our team recently built an application called Insights Engine to execute an arbitrary number N of near-arbitrary SQL-like queries and execute them in a way that can scale with increasing N.

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How-to: Install Apache Zeppelin on CDH

Categories: General Guest How-to Spark

Our thanks to Karthik Vadla and Abhi Basu, Big Data Solutions engineers at Intel, for permission to re-publish the following (which was originally available here).

Data science is not a new discipline. However, with the growth of big data and adoption of big data technologies, the request for better quality data has grown exponentially. Today data science is applied to every facet of life—product validation through fault prediction,

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How-to: Tune MapReduce Parallelism in Apache Pig Jobs

Categories: Guest How-to Pig

Thanks to Wuheng Luo, a Hadoop and big data architect at Sears Holdings, for the guest post below about Pig job-level performance tuning

Many factors can affect Apache Pig job performance in Apache Hadoop, including hardware, network I/O, cluster settings, code logic, and algorithm. Although the sysadmin team is responsible for monitoring many of these factors, there are other issues that MapReduce job owners or data application developers can help diagnose,

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How-to: Scan Salted Apache HBase Tables with Region-Specific Key Ranges in MapReduce

Categories: Guest HBase How-to

Thanks to Pengyu Wang, software developer at FINRA, for permission to republish this post.

Salted Apache HBase tables with pre-split is a proven effective HBase solution to provide uniform workload distribution across RegionServers and prevent hot spots during bulk writes. In this design, a row key is made with a logical key plus salt at the beginning. One way of generating salt is by calculating n (number of regions) modulo on the hash code of the logical row key (date,

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