[Spread-users] Are all group messages sent to all servers?

Stanisław Trytek tryteks at pit.edu.pl
Fri Sep 28 05:32:22 EDT 2007

On Thu, 20 Sep 2007 18:19:56 +0200, Jim Kleckner <jek-spread at kleckner.net>  

I would like to add some "late" comments on that issue.
 From our experience, wasting of bandwidth in WAN environment is really  
We have found pretty simple solution - to treat the whole WAN network as  
one segment and use multicast with increased TTL between daemons (of  
course our WAN allowes to do it). For LAN/WAN separation purposes we use  
gateways between spread networks.
That of course does not prevent delivery of packets to all daemons, but  
give advantage of using udp/multicast.

Stanislaw Trytek

> John Lane Schultz wrote:
>> I believe that all messages, including ones to private groups, go to all
>> daemons right now.  There has been talk of optimizing this behavior to
>> only send meta-messages to all daemons and send the actual messages
>> only to those daemons that need them, but this work has not yet been
>> done.
> Hm.  This is a big deal.
> One of the key beauties of spread is the way that it
> federates multiple remote LAN segments.  It is a huge
> simplification if local traffic stays local and remote traffic
> is replicated only if needed.  It would let you use one
> configuration and set of servers for a variety of
> simultaneous communication strategies.
> At the least, private group messages should be optimized.
> How hard is this type of optimization, both for private
> and for not-private?
> Is there a funder out there that would like to engage
> Spread Concepts to work on it?  About how
> much would it cost to fund?
> Cheers - Jim
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