NDLI: Extending collective operations with application semantics for improving multi-cluster performance

Content Provider	IEEE Xplore Digital Library
Author	Bongo, L.A. Anshus, O. Bjorndalen, J.M. Larsen, T.
Copyright Year	2004
Description	Author affiliation: Dept. of Comput. Sci., Tromso Univ., Norway (Bongo, L.A.; Anshus, O.; Bjorndalen, J.M.; Larsen, T.)
Abstract	We identify two ways of increasing the performance of allreduce-style of collective operations in a multi-cluster with large WAN latencies: (i) hiding latency in system noise, and (ii) conditional-allreduce where knowledge about the application is used to reduce the number of WAN messages. In our multicluster, system noise was not large enough to hide the WAN latency. But, the latency could be hidden using conditional-allreduce, since on many iterations only cluster-local values were needed, and many of the values needed from other clusters were prefetched. A speedup of 2.4 was achieved for a microbenchmark. Prefetching introduced a small overhead in the cluster with the slowest hosts.
Sponsorship	Enterprise Ireland and Univ. Coll. Cork
Starting Page	320
Ending Page	327
File Size	485145
Page Count	8
File Format	PDF
ISBN	0769522106
DOI	10.1109/ISPDC.2004.24
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-07-07
Publisher Place	Ireland
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Wide area networks Delay Application software Yarn Clustering algorithms Prefetching Grid computing Bandwidth Iterative algorithms Broadcasting
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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