Hadoop Hive - ORC Files

ORC File Format File Structure Stripe Structure HiveQLSyntax Serialization and Compression Integer Column Serialization String Column Serialization Compression ORC File Format The Optimized Row Columnar (ORC) file format provides a highly efficient way to store Hive data. It was designed to overcome limitations of the other Hive file formats. Using ORC files improves performance when Hive is readi

[mooz]

ORCFile Format

[yass]

" Index data includes min and max values for each column and the row positions within each column (A bit field or bloom filter could also be included.) / present bit stream: is the value non-null? "