3904 Apache ORC V0 and V1 Text (Structured) The Apache ORC (Optimized Row Columnar) format is an open-source, column-oriented data storage format which is utilized by prominent data processing frameworks including Apache Spark, Apache Hive, Apache Flink and Apache Hadoop.The format was annouced by Hortonworks (in collaboration with Facebook) in 2013. 1 Digital Preservation Department / The National Archives 28 Jan 2025 28 Jan 2025 fmt/2030 PUID orc File extension 3393 Apache ORC Absolute from beginning of file, magic bytes: ORC Absolute from end of file, magic bytes: ORC. 1 Absolute from BOF 0 0 4F5243 1 Absolute from EOF 0 0 4F5243(14|15|16|17|18)