ZeroMq IRC Log

Monday September 6, 2010

[Time] Name	Message
[02:18] mikejs	there's no INSTALL file in the 2.0.9 tarball, despite it being referenced in the README
[05:10] mato	mikejs: good catch, my fault for not testing one setting properly, i'll fix the tarballs
[08:16] BooTheHamster	hi
[08:17] mato	hi BooTheHamster
[08:17] BooTheHamster	can I connect ZMQ socket to zero port number, e.g. "tcp://localhost:0"?
[08:17] mato	0 is not a legal port number, so no :-)
[08:18] BooTheHamster	ZMQ don't get a random port no?
[08:18] mato	ah, you want dynamically assigned ports on socket?
[08:18] BooTheHamster	yes
[08:18] mato	that's a different question :)
[08:19] BooTheHamster	sorry for my english :(
[08:19] mato	no problem
[08:19] mato	for dynamically assigned ports, that's not possible at the moment but you can emulate it
[08:19] mato	on the bind side, you'll want to do a loop and try to bind to a random port in a portrange
[08:20] mato	see e.g. how pyzmq does it: http://github.com/zeromq/pyzmq/blob/master/zmq/_zmq.pyx
[08:20] mato	lines 588 onwards, "bind_to_random_port()"
[08:21] mato	you'll then want to save the port number you bound to, and connect to that
[08:21] mato	it's a hack, I hope to resolve this properly in 2.1.x
[08:21] mato	but that is still some way away
[08:21] BooTheHamster	great thanx, mato :)
[08:22] mato	BooTheHamster: you're welcome
[09:23] Tasser	no tcl binding for 2.0 yet?
[11:44] BooTheHamster	Hi. Can I use telnet (or something else) to debugging my application with ZMQ_REP socket?
[11:44] keffo	I suggest a debugger.
[11:47] BooTheHamster	I mean that I develop a server application, but don't have a client yet. Can I sent a messages to opened ZMQ socket?
[11:48] guido_g	write a simple client first then
[11:50] BooTheHamster	thanx
[11:50] guido_g	see here for an example http://github.com/guidog/cpp/blob/master/zmqcpp/sender.cpp
[11:51] guido_g	there is even simpler stuff in the tests directory on master
[11:52] BooTheHamster	thanx, guido_g.
[15:27] pieterh	heh, 0MQ on Reddit two years ago... http://www.reddit.com/r/programming/comments/6topk/zeromq_fastest_messaging_ever/
[15:28] pieterh	"This sounds like just a big marketing gimmic,"
[15:28] guido_g	reddit? yes...
[15:28] guido_g	]:->
[17:31] sbahra	pieterh, in all honesty, I first heard about ZeroMQ from the multithreading magic article (which states things like "To scale further, or developer must switch to 100% lock-free algorithms for data sharing. He is now into the realm of black magic."), and it made it seem like ZeroMQ was a marketing gimmick. :-P
[17:32] sbahra	Now, we're seriously looking at using ZeroMQ for the product I'm involved with. :-P
[17:32] pieterh	sbahra :-)
[17:32] pieterh	can you share what that product is?
[17:33] sbahra	If we use it, I'll let you know.
[17:33] sbahra	pieterh, it's a distributed high performance MTA.
[17:33] pieterh	nice!
[17:34] pieterh	i've thought for a while that 0MQ was ideal for clustered products
[17:34] sbahra	Based on my basic readings so far, it seems like it.
[17:34] sbahra	We're currently using spread.
[17:34] sbahra	Much older than 0MQ, I think. :-)
[17:34] sbahra	pieterh, http://spread.org/
[17:35] pieterh	yeah, found that via google...
[17:35] pieterh	interesting...
[17:36] pieterh	biggest difference I see so far is that Spread uses blue while 0MQ uses red
[17:37] sbahra	"Spread currently supports application messages upto around 100Kbytes. Currently the exact size is not exported as part of the API."
[17:37] sbahra	pieterh, it doesn't seem like that's the case for 0MQ. :-P
[17:37] pieterh	oh... their latency is measured in msec...
[17:37] sbahra	pieterh, spread is very resilient.
[17:38] pieterh	hmm, it's interesting...
[17:38] sbahra	Anyways, we'll see if we switch over to 0MQ sometime next year.
[17:39] sbahra	I should do some hackery dackery doe. Bye.
[17:39] pieterh	covers a lot of the ground people complain about missing in 0MQ
[17:39] pieterh	cyat