Cassandra

Cassandra is a NoSQLopen-source database. It can store data of different types and sizes and is one of the top database processing tools for mobile apps. Companies ranging from Apple and Netflix use Cassandra. A Cassandra developer can expect to earn $128,646 per year, and the pay has climbed 14.5 percent over the last year.

MapReduce

Commonly referred to as the ‘heart of Hadoop’, MapReduce combines cloud computing and Big Data processing by allowing Hadoop to store data across multitudes of low cost computer servers. To get meaningful results from Hadoop, a programmer writes software programs for MapReduce. The pay for MapReduce skills is $127,315 and the pay for closely associated jobs has increased to 11 percent in the previous year.

Cloudera

Cloudera is a company that makes a commercial version of open-source Hadoop. Although Hadoop is an effective big data tool, it is not user friendly. Several companies have stepped in to fill this gap, with Cloudera being the most popular at the moment. Pay for Cloudera competency has gone up by more than 20 percent in the last year. Average pay is currently at $126,816.

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