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  • HCatalog UsingHCat

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HCatalog is a table and storage management layer for Hadoop that enables users with different data processing tools — Pig, MapReduce , and Hive — to more easily read and write data on the grid. HCatalog’s table abstraction presents users with a relational view of data in the Hadoop distributed file system (HDFS) and ensures that users need not worry about where or in what format their data is stored — RCFile format, text files, SequenceFiles, or ORC files.

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