4. Synchronization (2).pdf
4. Synchronization (2).pdf
4. Synchronization (2).pdf
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Election<br />
• There is often a need for selecting a process<br />
with some special role<br />
– E.g., choose coordinator in a centralized protocol<br />
• If processes have unique id<br />
– Try to find process with highest id, make this leader<br />
– Algorithms differ in how they locate process with<br />
highest id<br />
• If processes do not have unique id (or similar)<br />
– Then there is no way to select any of them to be<br />
special<br />
– Well…<br />
Tanenbaum & Van Steen, Distributed Systems: Principles and Paradigms, 2e, (c) 2007 Prentice-Hall, Inc. All rights reserved. 0-13-239227-5
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