A Genetic Persistent Object Store

Building a Persistent Object Store using the Java Reflection API

In this paper we describe a persistent object store designed and implemented to test and evaluate the merits and shortcomings of the Java Reflection API. Our goal is to design a persistent object store that supports transparent object persistence. Our premise was that we should be able to achieve this goal if the reflection API is designed with enough features and flexibility. It turns out that...

Polymorphic Names, Types, Constancy and Magic in a Type Secure Persistent Object Store

The Design of a new Persistent Object Store for PJama

This paper presents the design of a new store layer for PJama. PJama is a platform that provides orthogonal persistence for Java1. Based on experience with a prototype, PJama0, a new architecture has been devised to permit incremental store management and to allow a number of object management regimes to co-exist in one store. It uses a plug-in model for composing a Java Virtual Machine (JVM) w...

Lumberjack: A Log-Structured Persistent Object Store

Lumberjack is a log-structured persistent object store intended for use with conventional operating systems such as Unix. The design draws together facets of previous work, in particular, the CPOMS object store used to support PS-algol, and the page-based log-structured store used in the Grasshopper persistent operating system. Lumberjack exhibits a novel store design that provides a number of ...

Incremental Garbage Collection of a Persistent Object Store using PMOS

PMOS is an incremental garbage collector designed specifically to reclaim space in a persistent object store. It is complete in that it will, after a finite number of invocations, reclaim all unreachable storage. PMOS imposes minimum constraints on the order of collection and offers techniques to reduce the I/O traffic induced by the collector. Here we present the first implementation of the PM...