By Topic

Limited effects of finite storage on a beneficial file migration policy

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$33 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

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

With the availability of high-speed local-area networks, file migration becomes an attractive option in a distributed file system. However, certain limitations may exist which restrict the movement of files. One such limitation is that storage space is finite and thus, storage sites (file servers) can only store a limited number of files. We use simulation to show that for a homogeneous distributed file system which transfers whole files, migrating files from congested to uncongested storage sites can result in significant performance gains over a system without file migration even in the case of finite storage. Our file migration policy is based on an instantaneous performance gain analysis: a file is migrated only if it leads to a decrease in the overall response time of the file requests currently in the system. Our results indicate that as the system load or coefficient of variation of the file request interarrival times increase, so does the percentage improvement of our file migration policy over a system without file migration. The degradation in performance caused by limited storage space is only significant when the storage restrictions are extreme

Published in:

Local Computer Networks, 1994. Proceedings., 19th Conference on

Date of Conference: