Java is one of the most widely used computer programming languages, however its use in
High Performance Computing (HPC) is relatively low. A typical HPC environment consists of
a number of multi-core computing nodes, while a typical application running in such an
environment will normally contain CPU intensive code that can be executed in parallel.
Such an application may require inter-node as well as intra-node communication. Message
Passing Interface (MPI) is a language independent specification of an API to allow such
communication. MPJExpress (Baker et al. 2006) and F-MPJ (Taboada et al. 2009) are Java-based implementations of MPI, designed with the efficient
performance of data transfers as a main objective. In this paper we discuss the
scalability of one approach of distributing data to compute nodes in HPC and we propose
the design of an alternative data transfer system, building upon MPI.