P*TIME ("Parallel* Transact-In-Memory Engine") is an in-memory relational database management system designed for real-time acquisition and analysis of update-intensive stream workloads.
P*TIME was acquired by SAP in 2005. It was then integrated as the transactional catalog system in SAP HANA.
P*TIME uses a fine-grain differential logging technique to allow for fast recovery of the entire database in memory.
Transact In Memory, Inc.