Tom Clune

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Rotationally constrained convection possesses velocity correlations that transport momentum and drive mean Ñows such as di †erential rotation. The nature of this transport can be very complex in turbulent Ñow regimes, where large-scale, coherent vorticity structures and mean Ñows can be established by smaller scale turbulence through inverse cascades. The(More)
Exascale computing systems are soon to emerge, which will pose great challenges on the huge gap between computing and I/O performance. Many large-scale scientific applications play an important role in our daily life. The huge amounts of data generated by such applications require highly parallel and efficient I/O management policies. In this paper, we(More)
Filesystems continue to be a major performance bottleneck for many applications across a variety of hardware architectures. Most existing attempts to address this issue, e.g., PVFS, rely upon system resources which are not typically tuned for any specific user application, whereas others rely on special hardware capabilities such as shared-memory.We have(More)
Filesystem I/O continues to be a major performance bottleneck for many high-end computing (HEC) applications and in particular for Earth science models, which often generate a relatively large volume of data for a given amount of computational work. The severity of this I/O bottleneck rapidly increases with the number of processors utilized. Consequently,(More)
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