[zeromq-dev] zyre question

[Pieter Hintjens]

On Tue, Jun 30, 2015 at 7:46 PM, Kalyan Bade <kalyanbade at gmail.com> wrote:

> Isn't the current node need to know who are all part of the multicast group
> in order for SHOUT to be reliably transferred to all members?

There is no "all" and no "reliably"... nodes broadcast JOIN messages,
and every node maintains its own vision of what groups exist. With
pauses and handshaking you can be more or less sure of membership.

> We did play around with different sleep values just before sending the
> SHOUT. It has become less prevalent with higher sleep values. But, I was
> looking for a deterministic solution as we are seeing the issue rarely with
> a sleep as high as 10 seconds

That is abnormal for inproc; you'd expect everything to be settled in
a second at most. You may have some other issues slowing down thread
startup.

> Btw, is gossip network not mandatory for forming the zyre mesh network?

Over WiFi or Ethernet you'd use beaconing to start with, and gossip if
you have a larger network and you want to control discovery. Over
inproc there's no alternative to gossip.

-Pieter