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PJama Release 1.6.5 (for JDK 1.2)

About PJama

PJama is an experimental prototype that implements Orthogonal Persistence for the Java platform (OPJ), which is an approach to making application objects persist between program executions with the minimum possible effort required from the application programs themselves.

OPJ and PJama are the result of collaborative research between the Forest Project at SunLabs and the Persistence and Distribution research group in the Department of Computing Science at the University of Glasgow, Scotland.

Release 1.6.5 is intended to promote early experience and feedback with orthogonal persistence in the Java community, based on a subset of the Orthogonal Persistence for Java specification, implemented for Solaris^TM. We believe that there many application areas that can benefit from orthogonal persistence and that it complements the existing persistence facilities for Java.

What's New in Release 1.6.x

Release 1.6.x is the first public release of a completely rewritten second generation prototype that is based on the Java Solaris Production Release. It contains the following improvements:

New, even simpler, API that conforms to the proposed OPJ specification.

Support for the JIT compiler that produces significant performance improvements.

Support for native Solaris threads.

New stable store layer (Sphere) that scales to much larger stores (of the order of 100GB.

Improved scalability and flexibility in object cache management.

Improved tools for class evolution.

What's New in Release 1.6.5

This is bugfix release that repairs a crash during garbage collection, an alignment problem that appeared as an 'I/O: offset argument out of range', and running out of log space in long running applications.

Accessing this Release

We are are making this release available for research and evaluation purposes. Currently this version runs only on Solaris/SPARC. A previous release of PJama, based on JDK 1.1.7 is also available for Windows NT, although it is only at a beta level and is not maintained.

Here are the instructions for accessing this release.

Installation

You should be running Solaris version 2.5.1 or later. Certain patches may be needed to your system. We recommend that you first install the Solaris Production Release after applying the patches that are described in its installation process. Once you have verified that this system is working correctly, you can install PJama. First, unzip and untar the distribution file in a dedicated directory in your system and then read the provided README file.