[Spread-users] Spread and double LAN for redundancy ?

Jonathan Stanton jonathan at cnds.jhu.edu
Wed May 28 09:25:08 EDT 2003

This is not a standard Spread feature, but you can find a patch
implementing it on the Spread development page

It is called the "multipath" patch. 

It is actually really hard to get exactly
what you said to work (where the second LAN is only used if the first
one failed, becuase you don't know when the first one failed so you
don't know what messages to send over the second). So the multipath
patch sends the messages onto both LANs at all times, and then removes
the duplicates that are received. That way the failure of one LAN won't
cause any problems.


On Wed, May 28, 2003 at 01:01:56PM +0000, . zist wrote:
> To avoid a single point of failure, is it possible to have
> each server with a Spread daemon connected to 2 separate LANs ?
> If there is a problem with one of the LANs, the Spread daemons would
> communicate with their peers over the other one.
> Is it a standard Spread feature ?
> If not, what would it take to achieve this result ?
> Thanks

Jonathan R. Stanton         jonathan at cs.jhu.edu
Dept. of Computer Science   
Johns Hopkins University    

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