At its core, we have MapReduce, YARN and the Hadoop Distributed File System, but the number of peripheral Apache projects that compliment Hadoop -- including Ambari, Chukwa, Avro, HBase and Mahout -- ...

This paper is to discuss about two distributed file systems Google File System (GFS) and Hadoop Distributed File System (HDFS) and compare them by making various use of parameters.

Quantcast, an internet audience measurement and ad targeting service, processes over 20 petabytes of data per day using Apache Hadoop and its own custom file system called Quantcast File System (QFS).