[erlang-questions] Max. number of distributed nodes?

Peter Sabaini <>
Fri Jul 10 18:06:18 CEST 2009


Hm, I seem to keep talking to myself... 

Please let me rephrase: I want to get a feeling for to how many nodes an
Erlang network can grow. The "Efficiency
Guide" (http://erlang.org/doc/efficiency_guide/advanced.html#7.2 ) lists
some system limits, but my tests suggest that the limits are much lower.
Is that the case? Do people have networks with more than some tens of
nodes in operation?

Thank you,
peter.

On Thu, 2009-07-09 at 16:11 +0200, Peter Sabaini wrote:
> I should maybe add that this is on a local network (gigabit) and the
> network seems reasonably healthy:
> 
> # ping -f -s1024 mass 
> PING mass.local (192.168.1.199) 1024(1052) bytes of data.
> .^C
> --- mass.local ping statistics ---
> 116392 packets transmitted, 116391 received, 0% packet loss, time
> 24487ms
> rtt min/avg/max/mdev = 0.118/0.154/0.330/0.017 ms, ipg/ewma 0.210/0.153
> ms
> 
> 
> I notice some network traffic when the nodes start up (spikes up to
> ~5Mbit/s) but far from being saturated; also there is some load
> (loadfactor ~1-3) on the machines during startup but nothing
> extraordinary. 
> 
> On Thu, 2009-07-09 at 14:45 +0200, Peter Sabaini wrote:
> > Hi,
> > 
> > I'm currently experimenting with a distributed Erlang setup and I'm
> > trying to get ~120 nodes spread (unevenly) over 5 machines to talk to
> > each other. 
> > 
> > Unfortunately, I often get errors of the kind:
> > 
> > =ERROR REPORT==== 9-Jul-2009::13:56:07 ===
> > The global_name_server locker process received an unexpected message:
> > {{#Ref<0.0.0.1957>,''},false}
> > 
> > Or 
> > 
> > =ERROR REPORT==== 9-Jul-2009::14:03:33 ===
> > global: '' failed to connect to ''
> > 
> > 
> > I tried:
> > 
> > * setting ERL_MAX_PORTS to 100 000
> > 
> > * using kernel-poll
> > 
> > * setting net_setuptime to 60s
> > 
> > but the errors persist.
> > 
> > Is there anything else I could try?
> > 
> > Thanks,
> > peter.
> > 
> > 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 197 bytes
Desc: This is a digitally signed message part
URL: <http://erlang.org/pipermail/erlang-questions/attachments/20090710/2d7b4223/attachment.bin>


More information about the erlang-questions mailing list