MapReduce is a programming model for distributed computation on big data sets in parallel. It's a module in the Apache Hadoop open source ecosystem, and a range of queries may be done based on the algorithms available. Here's when it's suitable (and not suitable) to use MapReduce for generating and processing data.

When development teams are pressed for time or budget, testing is often the first activity squeezed out. But testing will actually save you money in the long run. This story gives the basics of why it's crucial to test early and often, the types of testing you should perform, and how to get proactive against bugs.

It’s often hard for teams to get sufficient time and resources for the amount and quality of tests they think are needed. It’s like management wants testing done but at the same time doesn’t want to commit what’s needed to do it. If that's your case, look at the business side, rank priorities, and negotiate resources.