On Sat, Jul 6, 2013 at 6:11 AM, Juan López <[email protected]> wrote:
> I have been looking through the libzmq code, and I think that this case can > be solved with some modifications to the PUB-SUB sockets... It's a plausible change and you're welcome to try to make it and submit a pull request. However the strategy of blocking publishers when there's one slow subscriber is _really_ poor. It lets you kill a whole pub-sub system just by freezing one subscriber, e.g. doing something stupid in some downstream application. The same as allowing an infinite HWM. The only consistently safe response to a slow subscriber is to discard its messages and continue with the rest. On PUSH/PULL or DEALER the problem is different because one slow receiver just gets ignored. In general if you need a customised flow-control mechanism the better strategy is to use ROUTER-DEALER, to do the fanout yourself, and add credit based flow control or whatever else you need on top. -Pieter _______________________________________________ zeromq-dev mailing list [email protected] http://lists.zeromq.org/mailman/listinfo/zeromq-dev
