Hadoop是什么？

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What Is Hadoop?

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.
• 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.
  

Who Uses Hadoop?

A wide variety of companies and organizations use Hadoop for both research and production. Users are encouraged to add themselves to the Hadoop PoweredBy wiki page.