The Apache Hadoop project develops open-source software for reliable, scalable, distributed computing. Hadoop includes these subprojects:
Hadoop Common: The common utilities that support the other Hadoop subprojects.
Avro: A data serialization system that provides dynamic integration with scripting languages.
Chukwa: A data collection system for managing large distributed systems.
HBase: A scalable, distributed database that supports structured data storage for large tables.
HDFS: A distributed file system that provides high throughput access to application data.
Hive: A data warehouse infrastructure that provides data summarization and ad hoc querying.
MapReduce: A software framework for distributed processing of large data sets on compute clusters.
Pig: A high-level data-flow language and execution framework for parallel computation.
ZooKeeper: A high-performance coordination service for distributed applications.