The classical notion of persistency, originated in 60s, has been extensively studied up to now. An action of a processing system is said to be persistent if, whenever it becomes enabled, it remains enabled until executed. And a system is said to be persistent if each of its actions is persistent. This notion, introduced by Karp/Miller, is one of the most frequently discussed issues in the Petri...

Persistency is one of the notions widely investigated due to its application in concurrent systems. The classical notion refers to nets with a standard sequential semantics. We will present two approaches to the issue (nonviolence and persistency). The classes of different types of nonviolence and persistency will be defined for nets with step semantics. We will prove that decision problem conc...

High-volume transaction processing speed is critical for adequate performance in many enterprise application servers. We describe our experiences using an object-oriented persistency framework to achieve greatly enhanced server response by the transparent use of main-memory database technology. We took an application server whose data persistency is abstracted via a persistent object framework ...

The main trust of this paper is to explore the inter-company variations in persistency experience for a sample of 99 U.K. life insurers, using data collected and published by the U.K. financial services regulator. Our first objective is to ascertain whether the undoubted differences in persistency among U.K. long-term insurers are random in nature (as opposed to having some systematic features)...