On 9 August 2018 at 13:57, Saku Ytti <[email protected]> wrote: > On Thu, 9 Aug 2018 at 15:27, James Bensley <[email protected]> wrote: > >> A recent customer uses multicast to have the same packet arrive at >> multiple destinations at the same time for resilience (their own >> internal systems, not IPTV or media etc). Having just refreshed their >> network for the next 5-10 years it's not going away anytime soon. > > I believe the same time delivery is motivation for stock exchanges > too. One of the larger exchanges used MX and multicast, which of > course does btree or utree (in this case utree) replication, which > makes delivery times are very much variant. > So it is very much implementation detail what type of delivery time > differences to expect in different ports and it is not by design > superior to unicast.
I'm definately not saying it was a good idea / good design :) I'm just saying that it's another example of multicast in use that is not the usual IPTV or financial trading (aeronautical in this case). Cheers, James.
