Master Thesis - Past Projects - Abstract

Process Migration in OSE

ID: LiTH-IDA-Ex-01/62

This projects presents the result of a masters degree project in computer science. The project aim is to extend the real-time operating system OSE with a migration mechanism, such that it can migrate processes within a distributed system. This thesis investigates theories of process migration in the context of creating migration mechanisms in an operating system. Issues to consider in the migration mechanism are message redirection, state encapsulation, state transportation, code image, obsolete variables, real-time performances, and controlling the migration procedure. These issues are held as conditions for design and implementation of the developed migration mechanism. The result is a message transparent and fault tolerant migration mechanism without any residual dependencies. Further the migration mechanism does not interfere on the OSE design and does not rely on a master node, i.e., the migration mechanism is fully distributed. Drawbacks of the migration mechanism are due to OSEs state restriction and the constraint only having one unique process within a cluster (i.e., no identical copies of processes are allowed).

Keywords: process migration, load balancing, distributed real-timesystems

Author(s): Fredrik Gustafsson

Contact: Jörgen Hansson