[zeromq-dev] Can I prevent zeromq from occupying file descriptors?

Andriy Drozdyuk drozzy at gmail.com
Tue Jul 19 16:03:39 CEST 2016

I don't know if RESOURCE property is available in C++ implementation yet
(it's protocol version ZMTP 3.1):
You can use that... otherwise I've no idea.

On Tue, 19 Jul 2016 at 09:55 Alexander Poddey <alexander.poddey at gmx.net>

> Hi,
> I have a setup in C++ on linux where a master process is setting up a
> ZMQ_ROUTER and then forks many child processes, which then connect to that
> router (tcp protocol).
> Whenever a child zmq_connect's to the master, a file descriptor is occupied
> (and assigned to the master process). They get free'ed fine when the
> connection is close.
> This however limits the number of interacting processes to the number of
> allowed file descriptors (per process). For me (linux), this currently is
> 1024, which is way to small for my intended use (multi-agent / swarm
> simulation).
> Can I prevent this behaviour?
> In my mesaging architecture, each agent connects to 6 sockets, so with 100
> agents I end up with 600 occupied file descriptors :-(
> Alexander
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