David jefferson time warp biography

          Abstract: This chapter is about the history of the Time Warp algorithm and optimistic approaches to parallel discrete event simulation.

        1. He is well known among computer scientists for the co-invention of the Time Warp method of parallel discrete event simulation, and in
        2. He is coinventor of the time-warp method of parallel discrete event simulation.
        3. In this paper we introduce the Time Warp mechanism as a new method for concurrency control in distributed database systems.
        4. Jefferson F. Davis (June 3, – December 6, ) was an American politician who served as the first and only president of the Confederate States from

          5. He is coinventor of the time-warp method of parallel discrete event simulation.!

          The Time Warp mechanism for database concurrency control

          T h e T i m e W a r p M e c h a n i s m for D a t a b a s e C o n c u r r e n c y C o n t r o l D.

          Jefferson C o m p u t e r Science D e p a r t m e n t University of California - Los Angeles A. Motro C o m p u t e r Science D e p a r t m e n t University of Southern California 2. D a t a a n d T r a n s a c t i o n M o d e l Abstract We view a d a t a b a s e s y s t e m as a collection of objects, sequential processes t h a t execute concurrently and c o m m u n i c a t e through t i m e s t a m p e d messages.

          Each object is capable of both c o m p u t a t i o n and communication, and has an associated a "virtual clock" and several queues to be described later. All d a t a items, all executing transactions, and most of the d a t a b a s e m a n a g e m e n t system processes are packaged as objects, and the concurrency control mechanism does not make any formal distinctions among them.

          The defining feature of a d