[PDF] Hadoop - Oxiane

What is Hadoop & how does it work?

Unlike traditional systems, Hadoop enables multiple types of analytic workloads to run on the same data, at the same time, at massive scale on industry-standard hardware. CDH, Cloudera's open source platform, is the most popular distribution of Hadoop and related projects in the world (with support available via a Cloudera Enterprise subscription).

What is the fastest data store for Hadoop?

The distributed data store for Hadoop, Apache HBase, supports the fast, random reads/writes (“fast data”) required for online applications. CDH, the world's most popular Hadoop distribution, is Cloudera’s 100% open source platform.

What is Hadoop MapReduce & HDFS?

Its first iteration consists of two layers: HDFS: The Hadoop Distributed File System, responsible for storing data across multiple machines. MapReduce: The software framework for processing the data in place and in parallel on each machine, as well as scheduling tasks, monitoring them and re-running failed ones.

Is Apache Hadoop compatible?

The Apache Software Foundation has stated that only software officially released by the Apache Hadoop Project can be called Apache Hadoop or Distributions of Apache Hadoop. The naming of products and derivative works from other vendors and the term "compatible" are somewhat controversial within the Hadoop developer community.