Hadoop

hadoop is an open source framework to store and process big data in a distributed system.
its contain two models
- map reduce - the programming model
- HDFS - store and process data
there are several tools that in hadoop eco system to perform specific tasks
- Sqoop - used to import and export data between HDFS and RDBMS
- Pig - language for develop script for MapReduce operations
- Hive - platform to develop SQL type scripts to MapReduce operations