Wiliam:
Please read the section on unidirectional transfers. Your udp capacity might be
constrained by the nic - then again, maybe you need to change your operands...
https://users.soe.ucsc.edu/~kent/test/udpcast.html
________________________________
From: William Oquendo <woquendo(a)gmail.com>
Sent: Tuesday, July 6, 2021, 11:34 p.m.
To: Brent Kimberley
Cc: udpcast(a)udpcast.linux.lu
Subject: Re: Two or more clients drops bandwith by 2 orders of magnitude
Hi, thanks for your answer.
Do you mean making sure of that when doing the test by using udpcast? in that case how? I
cannot find explicitly how to do that in the manual.
In any case I re run the test (after a power failure) and things are scaling better now,
as expected. I do not know why ...
Thanks for udpcast
On Sat, Jul 3, 2021 at 5:17 AM Brent Kimberley
<Brent.Kimberley@durham.ca<mailto:Brent.Kimberley@durham.ca>> wrote:
William
Please ensure you are using UDP/IGMP.
Brent
Hi, (I hope this list is still active)
I am a newbie. I am testing multicast support on three computers connected
through a gigabit switch. When only the server, ran as (rand.bin is a 1Gb
file)
udp-sender --interface eth1 --file rand.bin
and ONE client
udp-receiver --file rand.bin
are connected, the bandwidth is around 937.32 Mbps, which is very good. But
with two or more clients if consistently drops to 11 Mbps
I would expect to bandwidth to decrease as 1/N, where N is the number of
clients.
What am I missing?
I am using a dumb switch.
Thanks
--
Best regards / Cordialmente,
William-Fernando Oquendo
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