This archive format is used as an installation packet in the Unix operating system for updating, querying, checking, deleting and installing software products. The RPM archive is a database that is comprised of a single base of program packets and a large number of small databases. The system can store information about packet modifications, deletions and installations.
This is a multi-thread method for compressing files, used in 7-Zip archivers for creating compressed 7z archives, and also in other archivers. It has better compression performance in terms of percentage and speed than bzip2 archives. It’s distributed with open code for developers.