[zeromq-dev] EPGM Congestion Control

Steven McCoy steven.mccoy at miru.hk
Fri May 13 14:05:51 CEST 2011

On 13 May 2011 19:15, Martin Sustrik <sustrik at 250bpm.com> wrote:

> > 2.The EPGM interface does not allow you to set the time-to-live option
> > in the setsockopt method.
> There are no TTLs either in PGM or 0MQ. Do you mean IP TTL option?
That's what I would guess, IPv4 TTL / IPv6 hop limit.

>  > 3.When testing EPGM for throughput limits I discovered that all of the
> > messages are batched until a UDP packet is full before sending it. I do
> > not what this to occur. I want all messages to be sent as individual UDP
> > packets. There should be an option to configure this functionality.
> Sounds doable. Would you like to provide a patch?
This is odd, for throughput you generally want less packets as current day
technology cannot saturate Ethernet with very small packets.

There is no actual question about PGM congestion control?

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