Towards a single system image for high-performance Java

Summary form only given. We present our attempts to provide a partial SSI (single system image) in a cluster for concurrent Java programmers, and discuss how the design of the Java Virtual Machine (JVM) has made it possible. At the core of our present design are a thread migration mechanism that works for Java threads compiled in just-in-time (JIT) mode, and an efficient global object space that enables cross-machine access of Java objects. We close with some thoughts on what can be done next to popularize our or similar approaches.