Review Article
Big Data: Survey, Technologies, Opportunities, and Challenges
Table 2
Hadoop components and their functionalities.
| Hadoop component | Functions |
| (1) HDFS | Storage and replication | (2) MapReduce | Distributed processing and fault tolerance | (3) HBASE | Fast read/write access | (4) HCatalog | Metadata | (5) Pig | Scripting | (6) Hive | SQL | (7) Oozie | Workflow and scheduling | (8) ZooKeeper | Coordination | (9) Kafka | Messaging and data integration | (10) Mahout | Machine learning |
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