On Wed, Nov 28, 2012 at 7:25 AM, Dan Goes <[email protected]> wrote:
> After reviewing a lot of the list's history of questions about UDP support > in zeromq, I've got some of my own... I did quite a lot of experimentation with UDP for 0MQ patterns a year or two ago. The results weren't impressive, performance wise. Semantically, it maps quite nicely, if you're OK with short messages and a high rate of loss. > - What sort of performance increases could we see with UDP transport over > TCP transport in zeromq, if it were a feature? Probably quite a large drop in performance. If latency is really your concern I'd first make sure you're working asynchronously, not round-tripping, and if you then need lower latency, I'd look at options like Infiniband. > - If UDP could help us, what options are available to have it baked into > zeromq? The first stage is to simply measure with stand-alone code and make sure it's worth doing. You'd want a side-by-side test of raw TCP and raw UDP that shows performance on different types of network. Second step, if this proves the benefit, is to make the change or ask someone to make the change. iMatix is happy to do this kind of thing for you, commercially. There is some proof of concept UDP work already done, in https://github.com/imatix/vtx/tree/master/v3. That was a bridging approach (using inproc to talk to a separate thread doing the UDP). -Pieter _______________________________________________ zeromq-dev mailing list [email protected] http://lists.zeromq.org/mailman/listinfo/zeromq-dev
