https://community.cloudera.com/t5/Support-Questions/How-HCatalog-is-different-from-Hive/m-p/215291#M177201 <P>HCatalog is a table and storage management layer for <A href="https://data-flair.training/blogs/hadoop-tutorial/">Hadoop</A> that enables users with different data processing tools — Pig, MapReduce — to more easily read and write data. 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 HCatalog supports reading and writing files in any format for which a SerDe (serializer-deserializer) can be written. By default, HCatalog supports RCFile, CSV, JSON, and SequenceFile, and ORC file formats. To use a custom format, you must provide the InputFormat, OutputFormat, and SerDe.</P> Wed, 24 Oct 2018 18:53:34 GMT sharmadukool136 2018-10-24T18:53:34Z