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RMI System Design: Patterns and Pitfalls	O'Reilly Conference On Enterprise Java
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Polling

Peers or clients periodically request updates.
Is easy to understand.
Tends to allow a simple protocol.
Generally lower performance:
- Polls during periods of no state changes merely waste network bandwidth.
- Increasing the number of peers increases the amount of requests by the number of polls per change.
However, if number of changes is high, and clients don't need to know of every change, polling can be appropriate.

Last modified on 9 Feb 2002 by AO