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The PUNCH virtual file system: seamless access to decentralized storage services in a computational grid

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3 Author(s)
Figueiredo, R.J. ; Sch. of Electr. & Comput. Eng., Purdue Univ., West Lafayette, IN, USA ; Kapadia, N.H. ; Fortes, J.A.B.

Describes a virtual file system that allows data to be transferred on demand between storage and computational servers for the duration of a computing session. The solution works with unmodified applications (even commercial ones) running on standard operating systems and hardware. The virtual file system employs software proxies to broker transactions between standard NFS (Network File System) clients and servers; the proxies are dynamically configured and controlled by computational grid middleware. The approach has been implemented and extensively exercised in the context of PUNCH (Purdue University Network Computing Hubs), an operational computing portal that has more than 1,500 users across 24 countries. The results show that the virtual file system performs well in comparison to native NFS: performance analyses show that the proxy incurs mean overheads of 1% and 18% with respect to native NFS for a single-client execution of the Andrew benchmark in two representative computing environments, and that the average overhead for eight clients can be reduced to within 1% of native NFS with concurrent proxies

Published in:

High Performance Distributed Computing, 2001. Proceedings. 10th IEEE International Symposium on

Date of Conference:

2001

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