@InProceedings{madhyastha:informed, author = {Tara M. Madhyastha and Garth A. Gibson and Christos Faloutsos}, title = {Informed Prefetching of Collective Input/Output Requests}, booktitle = {Proceedings of SC99: High Performance Networking and Computing}, year = {1999}, month = {November}, publisher = {ACM Press and IEEE Computer Society Press}, address = {Portland, OR}, URL = {http://www.sc99.org/proceedings/papers/madhyast.pdf}, keywords = {informed prefetching, disk-directed I/O, parallel I/O, pario-bib}, comment = {They argue that if enough application prefetches are made, a standard Unix interface will provide the same performance as a collective I/O interface. She uses simulation to show that if the file ordering is preserved, then the prefetch depth (the number of advance requests) is bounded by the number of disk drives. They look at two global access patterns: a simple interleaved sequential pattern and a 3-D block decomposition. Their experiment used 8 procs and 8 disks and did a comparison of the prefetching techniques to disk-directed I/O. Emperical studies showed that they needed a prefetch horizon of one to two times the number of disks to match the performance of disk-directed I/O, but the prefetching techniques require more memory.} }