Re: [certi-dev] Maximum amount of federates (Timi Tuohenmaa)

[Eric Noulard]

Hi all,

2014-10-20 16:22 GMT+02:00 Timi Tuohenmaa <address@hidden>:

Hi,

I have been testing bit more.

Now all the tests I have done shows that count is 63 federates that
are working. Adding 64th causes some messages not to work. Often
attrbute updates continue to work, but update requests or new objects
does not come to other federates (RTIG gets that request though) until
one federate is closed. I guess my previous 66 was either
miscalculation or some dead rtia.exe I counted for no reason (also I
probably counted rtig.exe as rtia.exe). 64 is such a number that I
wonder if there is something hardcoded in CERTI to limit it to that
kind of specific count.

I tested this also with basic 3.4.3 version to make sure our fixes
were not causing problems (fixes are in bug tracker).

I haven't found anything from CERTI source yet. I'm pretty sure this
problem is CERTI related and not HLA related so other RTI libraries
does not have same issue (yet they might have other issues when using
high amount of federates).

Interesting.

I have no time right now to investigate that issue but I'd be willing to help.

RTIG is issuing a select on the socket file descriptor.

There seems to be some limit to 64 descriptor on winsock2:
http://msdn.microsoft.com/en-us/library/windows/desktop/ms739169%28v=vs.85%29.aspx

Are running your test with windows machine?

-Timi

2014-10-17 14:25 GMT+03:00 YangJing <address@hidden>:
> Hi,I have the same puzzle about the maximum amount of federates.In some special applications,I want to run some auto dynamically generated federates.
> With the larger amount of federates,the physical Network maybe become more complex,even due to No more TCP connection can be creating successfully or higher UDP data package losing rate.
> Is there a/some complete test(s) about the maximum amount of federates under some typical physical network condition?What is the real reason about the problem?Is this problem happen ing with other RTI libraries,such as p-RTI,mak-RTI and so on?
> Another question about rti:Is RTI library can be using in lab only?How about large scale using in some high reliable applications? Thanks.
>
> YangJing
>
>
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