ViPIOS: The Vienna Parallel Input/Output System

. In this paper we present the Vienna Parallel Input Output System (ViPIOS), a novel approach to enhance the I/O performance of high performance applications. It is a client-server based tool combining capabilities found in parallel I/O runtime libraries and parallel file systems. 1 Introduction In the last few years the applications in high performance computing (Grand Challenges [1]) shifted from being CPU-bound to be I/O-bound. Performance can not be scaled up by increasing the number of CPUs any more, but by increasing the bandwidth of the I/O subsystem. This situation is commonly known as the I/O bottleneck in high performance computing ([5]) In reaction all leading hardware vendors of multiprocessor systems provided powerful concurrent I/O subsystems. In accordance researchers focused on the design of appropriate programming tools to take advantage of the available hardware resources. 1.1 The ViPIOS approach Conventionally two different directions in developing programming supp..