#Apache Cassandra
Valuation: approx 80lacs

This open source distributed data management system manages large amount of structured data providing high availability service with no single point of failure. Cassandra does not hold a complex data base model and therefore, ends in serving customers with simple data base models that has complete control over data layout and format of the target web design.

It’s programming language is Java alone. Companies that have successfully employed Cassandra in their projects are Adobe, twitter, Netflix, Cisco, Ebay and Comcast. The advantage of using Cassandra is its elastic scalability that is, online accommodation of as many customers and data. It’s fast, simple with an efficient transaction support system.

# MapReduce
Valuation: approx 79lacs

It’s called the heart of Hadoop. This data processing model condenses large volumes of data into useful aggregated results. Libraries for MapReduce have been written in many programming languages. This data condenser does not necessarily need to be fast.

However it’s Partition, Compare and Reduce function guarantees credibility to the data flow. Google’s entire index of World Wide Web was composed with the aid of MapReduce. MapReduce can be used in pattern based searching, distributed sorting, Single value Decomposition and many more purposes. It’s possible to get hired here because it has over 500 vacancies as per an online survey result.

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