[Spread-users] detecting network outages
Matt Garman
matthew.garman at gmail.com
Thu Jul 2 18:18:14 EDT 2009
Does anyone have any techniques or ideas for consistently detecting
a network outage, and then automatically re-establishing spread
communications once connectivity is restored?
Say I have two hosts, S and R. I have a spread daemon running only
on host R. Host S has a program that is sending messages to R via
the daemon running on R. Host R has a program that is listing to
messages via its local spread daemon.
ASCII graphic of the scenario for those of you using fixed width
fonts:
+------------------+ +----------------+
| Host R |-------network-------| Host S |
+------------------+ +----------------+
| receiver program | | sender program |
+------------------+ +----------------+
| spread daemon |
+------------------+
How can the programs on both R and S reliably detect when there is a
network failure between R and S?
In testing this scenario, I cannot figure out how I can get spread
to tell me if the network is down.
Thoughts?
Thank you,
Matt
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