Efficient replicated method invocation in Java

Abstract
We describe a new approach to object replication in Java, aimed at improving the performance of parallel programs. Our program- ming model allows the programmer to define groups of objects t hat can be replicated and updated as a whole, using totally-ordered broadcast to send update methods to all machines containing a copy. The model has been implemented in the Manta high-per- formance Java system. Performance measurements on a Myrinet cluster show that the replication mechanism is efficient (e. g., up- dating 16 replicas of a simple object takes 68 microseconds, only slightly longer than the Manta RMI latency). Example applications that use object replication perform as fast as manually opti mized versions based on RMI.

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