[Olsr-users] lxc network emulation

[(spam-protected)]

Well, it is good news in a way, I will have to see where my setup is not
optimized.
For my setup, it takes 10 mn to start all 150 machines from nothing to
pinging any machine and 3 mn to delete all the config and file-systems.

Thanks for your figures and sorry for my mistakes, this was a very
interesting thread for me.
I am going on holiday, back in a week, if you make any more experiments in
big networks, please send your results to me or the list.

Regards
Vincent


> On Sat, Oct 22, 2011 at 1:00 PM, <(spam-protected)> wrote:
>
>> Hello again Markus,
>> I would like details about the topology you had:
>>
>> Here, you seem to speak of a network where olsr are isolated,
>
> no they aren`t isolated!
> (it wouldn`t make much sense to run hundreds or thousands of isolated
> routing daemons, wouldn`t it?)
>
> have their own network stack, means, they do not borrow the lxc host
> ones,..
> (which is also possible with lxc, but does not make much sense when
> simulating networks,..)
>
> i.e. they have there own interfaces, ip adresses, and there own routing
> tables,..
> (they also forward traffic, and are pingable itself)
>
> but they do not have there own "system" running,..
> (instead of exectuing init of the rootfs, lxc configures all network
> aspects
> itself, and directly starts olsrd)
>
> but having an rootfs with an a serial console runing costs less than 1MB
> RAM, but ~ one second additional startup time, but afterwards cpu load is
> the same.
>
> (which means ~ 90 minutes to wait for 2000 instances to start, while
> without
> rootfs its doable in ~ 10 minutes )
>
>
>> I really
>> need precise figures to be sure we are comparing similar things, about
>> the
>> case of the 2000 lxc running olsr:
>>
>> Could you reach each node with each other node with a ping ?
>>
> sure,..
>
>>
>> And also: how many hops where necessary for the extreme nodes to reach
>> each-other?
>>
> hmm average was ~ 7 hops.
>
> but topology (except maybe extreme ones) do not matter much regarding
> load,
> its (beside the number of isntances) the number of (olsrd) links that
> affects the load (and memory consumption) of the running routing daemons.
>
>>
>> In my case all pings where good and reactive and the biggest number of
>> hops was around 20.
>>
>> but next time i can try a large square or cube setup, to have a easier
> compareable topo.
>
> Markus
>