Lecture
The Wandering Token - Congestion avoidance of a shared resource
Speaker: |
Augusto Ciuffoletti, University of Pisa |
Date: |
Thursday, 23 November 2006 |
Time: |
11:00-13:00 |
Location: |
"Stelios Orphanoudakis" Seminar Room, FORTH. Heraklion, Crete |
Host: |
| Abstract: |
In a distributed system where scalability is an issue, the problem
of enforcing mutual exclusion often arises in a {\em soft} form: the
infrequent failure of the mutual exclusion predicate is tolerated,
without compromising the consistent operation of the overall system.
For instance this occurs when the operation subject to mutual exclusion
requires massive use of a shared resource. We introduce a scalable
{\em soft mutual exclusion} algorithm, based on token passing: one
distinguished feature of our algorithm is that instead of introducing
an overlay topology we adopt a random walk approach. The consistency of
our proposal is evaluated by simulation, and we examplify its use in the
coordination of large data transfers in a backbone based network. |
| Bio: |
Augusto Ciuffoletti is a
researcher at the Department of Computer Science at the University
of Pisa, where he teaches two courses about Internet. He established
a strong collaboration with the Italian Institute of Nuclear Physics
in the frame of their project for a Computing Grid, and participates
to the CoreGRID project as an INFN member. His stay at FORTH institute
is part of the of a CoreGRID activity. Home page: http://www.di.unipi.it/~augusto/home.html |
