Technical due diligence is the process of verifying a company’s technical capabilities, quality, and processes. It is typically performed by investors or buyers before a contract. There are many aspects you can investigate, but three are crucial: a code review, security evaluation, and open source components compliance.

Apache Hadoop is a framework for big data. One of its main components is HDFS, Hadoop Distributed File System, which stores that data. You might expect that a storage framework that holds large quantities of data requires state-of-the-art infrastructure for a file system that does not fail, but quite the contrary is true.

Relational database management systems (RDBMS) store data in rows and columns. Most relational databases store data row-wise by default, but a few RDBMS provide the option to store data column-wise, which is a useful feature. Let’s look at the benefits of being able to use columnar storage for data and when you'd want to.