PC-OPT: Optimal Offline Prefetching and Caching for Parallel I/O Systems
| dc.citation.issueNumber | 11 | en_US |
| dc.citation.journalTitle | IEEE Transactions on Computers | en_US |
| dc.citation.volumeNumber | 51 | en_US |
| dc.contributor.author | Kallahalla, Mahesh | en_US |
| dc.contributor.author | Varman, Peter J. | en_US |
| dc.contributor.org | Electrical and Computer Engineering | en_US |
| dc.contributor.org | Varman Laboratory | en_US |
| dc.date.accessioned | 2015-09-15T17:09:40Z | en_US |
| dc.date.available | 2015-09-15T17:09:40Z | en_US |
| dc.date.issued | 2002-11 | en_US |
| dc.description.abstract | Abstract—We address the problem of prefetching and caching in a parallel I/O system and present a new algorithm for parallel disk scheduling. Traditional buffer management algorithms that minimize the number of block misses are substantially suboptimal in a parallel I/O system where multiple I/Os can proceed simultaneously. We show that in the offline case, where a priori knowledge of all the requests is available, PC-OPT performs the minimum number of I/Os to service the given I/O requests. This is the first parallel I/O scheduling algorithm that is provably offline optimal in the parallel disk model. In the online case, we study the context of global L-block lookahead, which gives the buffer management algorithm a lookahead consisting of L distinct requests. We show that the competitive ratio of PC-OPT, with global L-block lookahead, is M ÿ L D , when L M, and MD=L , when L > M, where the number of disks is D and buffer size is M. | en_US |
| dc.identifier.citation | M. Kallahalla and P. J. Varman, "PC-OPT: Optimal Offline Prefetching and Caching for Parallel I/O Systems," <i>IEEE Transactions on Computers,</i> vol. 51, no. 11, 2002. | en_US |
| dc.identifier.doi | http://dx.doi.org/10.1109/TC.2002.1047757 | en_US |
| dc.identifier.uri | https://hdl.handle.net/1911/81639 | en_US |
| dc.language.iso | eng | en_US |
| dc.publisher | IEEE Xplore | en_US |
| dc.subject.keyword | I/O | en_US |
| dc.subject.keyword | Information Storage | en_US |
| dc.subject.keyword | Electrical and Computer Engineering | en_US |
| dc.subject.keyword | Parallel I/O Systems | en_US |
| dc.subject.keyword | caching | en_US |
| dc.subject.keyword | prefetching | en_US |
| dc.subject.keyword | scheduling | en_US |
| dc.subject.keyword | buffer management | en_US |
| dc.subject.keyword | competitive ratio | en_US |
| dc.subject.keyword | algorithms | en_US |
| dc.subject.keyword | online algorithm | en_US |
| dc.subject.keyword | offline algorithm | en_US |
| dc.title | PC-OPT: Optimal Offline Prefetching and Caching for Parallel I/O Systems | en_US |
| dc.type | Journal article | en_US |
| dc.type.dcmi | Text | en_US |