30.12.2010, 10:52, "Martin Sustrik" <sust...@250bpm.com>: > On 12/30/2010 12:17 AM, Paul Colomiets wrote: > >> For reliability of REQ sockets I use a timeouts. Likewise PUB/SUB >> I could send somehow "pause" command to publisher, and >> read the data until got "paused" message. But it means all >> subscribers will suffer. Is there any better ideas? > > Even worse, waiting for pause-ack can cause the subscriber to hang-up on > shutdown (if there's an network disruption or such). You are right. I can use timeouts, but it usually means, that restart process could last for few seconds, or may be tens of seconds.
> The problem you are > solving is traditionally solved by acking individual messages in async > manner and resending those that weren't acked after the client > reconnects. The client has to drop the duplicate messages. Well, that means that I must use XREQ/XREP instead of PUB/SUB. And does this mean, I should use PUB/SUB only where reliability is not needed? And do you have any plans to change this? I mean implement another kind of pub/sub which will send acks. Or maybe graceful socket shutdown? (which I see preferred, because both ways will not work if there is a device in the middle and it crashes, but the latter will have less performance impact) -- Paul _______________________________________________ zeromq-dev mailing list zeromq-dev@lists.zeromq.org http://lists.zeromq.org/mailman/listinfo/zeromq-dev
