Deepak Vohra

Deepak is a Sun Certified Java Programmer and Web Component Developer, and has worked in the fields of XML, Java programming and Java EE for ten years. Deepak is the co-author of the Apress book Pro XML Development with Java Technology and was the technical reviewer for the O'Reilly book WebLogic: The Definitive Guide. Deepak was also the technical reviewer for the Course Technology PTR book Ruby Programming for the Absolute Beginner. Deepak is also the author of the Packt Publishing books JDBC 4.0 and Oracle JDeveloper for J2EE Development, Processing XML Documents with Oracle JDeveloper 11g, EJB 3.0 Database Persistence with Oracle Fusion Middleware 11g, and Java EE Development in Eclipse IDE. Deepak is a Docker Mentor and has published 5 books on Docker and Kubernetes.

All Stories by Deepak Vohra

Before Data Analysis, You Need Data Preparation

One of the prerequisites for any type of analytics in data science is data preparation. Raw data usually has several shortcomings in structure, format, and consistency, so first it has to be converted to a usable form. These are some types of data preparation you can conduct to make your data useful for analysis.

Exploring Big Data Options in the Apache Hadoop Ecosystem

With the emergence of the World Wide Web came the need to manage large, web-scale quantities of data, or “big data.” The most notable tool to manage big data has been Apache Hadoop. Let’s explore some of the open source Apache projects in the Hadoop ecosystem, including what they're used for and how they interact.

When to Use Different Types of NoSQL Databases

Web-scale data requirements are greater than at a single organization, and data is not always in a structured format. NoSQL databases are a good choice for a larger scale because they're flexible in format, structure, and schema. Let’s explore different kinds of NoSQL databases and when it’s appropriate to use each.

Selecting a Cloud Service

Cloud services are relatively new, and for those used to downloading and installing software, it may be daunting at first when trying to figure out which cloud service to use. Let’s analyze the different options—infrastructure as a service, platform as a service, and software as a service—and when you should use each.

Explaining Hardware Virtualization and Containerization

Virtualization is the abstraction of a computer resource—such as hardware, memory, storage, an operating system, a desktop machine, or a network—built on top of the physical resource. There are many types of virtualization, and here, we look at virtualization of hardware and of an operating system, or containerization.

Selecting a Database for Your Data Needs

Data requirements vary, and with so many different types of databases, selecting which to use can be a tricky choice. It all depends on what your database will be used for, the data structure, and the scale of data. Let’s look at six popular database types so you can decide which would be best for your situation.

Agile Is Not the Same as DevOps

Agile and DevOps are two terms that are often confused with each other and sometimes used interchangeably. But they are not the same idea. While both improve software performance, these concepts are actually quite different. Let's look at their definitions, origins, and principles, as well as using each in practice.