The Design and Implementation of Persistence in the Annex System

Abstract : Orthogonal persistence in operating systems has been a topic of research for a number of years. Several commercial, as well as research projects, have implemented orthogonal persistence as an essential part of their design. Amongst these we can count the Annex software system developed at DSTO. In this technical note we consider the design and implementation of persistence in Annex against the background of two other capability-based, orthogonally persistent operating systems. This background is used to highlight the approach taken by the Annex system, and the reasons why such an approach was used. The description given discusses the current Annex prototype and explores the directions persistence in Annex will take in the future as a result of lessons learned.