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Potential benefits of file migration in a heterogeneous distributed file system

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4 Author(s)
Hurley, R.T. ; Comput. Studies Program, Trent Univ., Peterborough, Ont., Canada ; Yeap, S.A. ; Wong, J.W. ; Black, J.P.

Due to limited numbers of resources in a distributed system, resource management strategies such as file migration have become increasingly important. We establish through simulation, that in a heterogeneous environment, a system which migrates whole files from congested to less congested storage sites can result in significant performance gains over a system without file migration. Our file migration policy is based on an instantaneous performance gain analysis; basically, a file migration is performed whenever if seems to lower the total response time of requests already in the system. User behavior in our system is modeled with time-varying file request probabilities in order to create variable levels of file access intensities. Our model establishes the conditions under which file migration is beneficial in a heterogeneous distributed file system

Published in:

Computing and Information, 1993. Proceedings ICCI '93., Fifth International Conference on

Date of Conference:

27-29 May 1993