Recent Advances in Parallel Virtual Machine and Message Passing Interface : 6th European PVM MPI Users’ Group Meeting Barcelona Spain September 26–29 1999 Proceedings This book constitutes the refereed proceedings of the 6th European Meeting of the Parallel Virtual Machine and Message Passing Interface Users Group PVM MPI 99 held in Barcelona Spain in September 1999. The 67 revised papers presented were carefully reviewed and selected from a large number of submissions. All current issues of PVM and MPI are addressed. The papers are organized in topical sections on evaluation and performance extensions and improvements implementation issues tools algorithms applications in science and engineering networking and heterogeneous distributed systems