[zeromq-dev] ZeroMQ behavior in satellite networks (high variable latency)

jricher jricher at jricher.com
Wed Feb 12 23:09:05 CET 2020

Does your application have a tunable for in flight messages? If so, you may improve things by increasing that parameter. Jacques Richer602-350-2463
-------- Original message --------From: Doron Somech <somdoron at gmail.com> Date: 2/12/20  2:48 PM  (GMT-07:00) To: ZeroMQ development list <zeromq-dev at lists.zeromq.org> Subject: Re: [zeromq-dev] ZeroMQ behavior in satellite networks (high variable latency) Except setting the nodelay flag, zeromq doesn't do anything special regarding tcp.I would try to compile without setting this flag, I wonder if it might help.How many messages are you sending in a second per peer? What is the high-watermark and tcp buffer size configurations?On Wed, Feb 12, 2020, 23:18 Sylvain Fabre - INPIXAL <sylvain.fabre at inpixal.com> wrote:

Sorry, i forgot to add some missing information : 
When using a RTSP streaming, in TCP, in the same condition (ie 2Mb/sec stream) it is working fine.
The kernel has already all the necessary options (TCP window size, etc, etc).
So what i can conclude tigh now on the satellite network : 
A "regular" TCP connection is working
A ZMQ PUSH-PULL connection is not working
So the issue seems to be related to ZMQ, in a way or another.
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