zeromq-dev@lists.zeromq.org discussions

3	[zeromq-dev] Broadcast mode for ZMQ_STREAM

Hi, I am using ZMQ_STREAM to receive and deliver data from/to non-zeroMQ applications. For delivery, I have to send the data to a number of connected clients. All clients receive a copy of the data ...

Jens Auer
Jun 17, 2016 at 5:09 pm
Jun 17, 2016 at 8:17 pm

6	[zeromq-dev] EAGAIN on ZMQ_STREAM

Hi, I am witnessing something in my system that I didn't expect. I am processing data at a data rate of 100Mbps, with occasional peaks of 5s of data (=5 * 100Mbps) delivered as fast as possible ...

Jens Auer
Jun 17, 2016 at 5:05 pm
Jun 18, 2016 at 5:21 pm

1	[zeromq-dev] [zeromq-announce] ZeroMQ 4.0.8 stable is now available

In the manpage for version 4.0.8 for zmq_ctx_set there are now ZMQ_THREAD_SCHED_POLICY and ZMQ_THREAD_PRIORITY that were not there for version 4.0.7, but there are no changes in zmq.h Are these now ...

Peter Kleiweg
Jun 17, 2016 at 2:36 pm
Jun 17, 2016 at 3:10 pm

3	[zeromq-dev] XPUB unsubscriptions with ZMQ_XPUB_MANUAL

Hi, I'm experimenting with "manual" mode of XPUB and see that on client disconnection socket generates messages indicating unsubscription in terms of *topics* rather than custom messages provided by ...

Fedor Sheremetyev
Jun 16, 2016 at 9:37 am
Jun 17, 2016 at 1:03 pm

2	[zeromq-dev] Zero copy

The faq makes reference to zero copy, but I can't find it documented anywhere. -- <-Douglas Petican-

Douglas Petican
Jun 16, 2016 at 1:18 am
Jun 16, 2016 at 9:24 pm

1	[zeromq-dev] IoT pattern work in progress

I've been working on req-broker-rep messaging pattern for an application and so far its working great. Thanks for the help. Right now it does what I need it to do for the current application, but ...

Douglas Petican
Jun 16, 2016 at 12:35 am
Jun 16, 2016 at 6:00 am

3	[zeromq-dev] Not blocking forever when waiting for response

Just went through a sorta code review today and got asked the question: what happens if Y module doesn't respond to X modules request? My answer was: then I coded Y module wrong because the contract ...

Douglas Petican
Jun 15, 2016 at 11:17 pm
Jun 18, 2016 at 4:52 pm

3	[zeromq-dev] ZeroMQ Reliable Multicast just halts and never continues

Hi Folks - I am using 0MQ and CLRZMQ wrapper for C# on Windows 7. I have a client app running on a Windows box that receives reliable multicast from 6 different server processes. The server processes ...

Paul Krauss
Jun 15, 2016 at 2:23 pm
Jun 15, 2016 at 5:18 pm

1	[zeromq-dev] correct way of failing over to another server

Hi, I wanted to know what is the preferred way to implement a failover strategy across servers using the ZeroMQ (specifically NetMQ) libraries on the client side. I have a bunch of identical servers ...

Sachin Agrawal
Jun 14, 2016 at 6:30 pm
Jun 14, 2016 at 7:40 pm

2	[zeromq-dev] [CZMQ/git latest] make check failing ubuntu 14.04 LTS

Hi! Just noticed that make check for czmq is failing fom git latest in test zsock: $ valgrind -v ./czmq_selftest -v -t zsock =%433== Memcheck, a memory error detector =%433== Copyright (C) 2002-2011, ...

Frittum Johannes
Jun 14, 2016 at 2:38 am
Jun 14, 2016 at 6:44 am

6	[zeromq-dev] Please un-deprecate MDP 0.1

Hello, I have just noticed that MDP 0.1 has been deprecated and I would like to ask for this tag to be removed. http://rfc.zeromq.org/spec:7/ Truth be told, it is possible that it has been the case ...

Dariusz Suchojad
Jun 13, 2016 at 6:36 pm
Jun 17, 2016 at 2:20 pm

0	[zeromq-dev] pyzmq and curve, as server

Hi, I'm trying to use the CURVE mechanism with PYZMQ, following the code example at https://github.com/zeromq/pyzmq/blob/master/examples/security/stonehouse.py. I created an authenticator, I ...

Julien Kauffmann
Jun 13, 2016 at 12:57 pm
Jun 13, 2016 at 12:57 pm

4	[zeromq-dev] docker accounts

Hello zeromqers, I've been recently looking at the docker images of zeromq that are provided on docker hub. There're two docker hub organizations I'm interested in particular "zeromq" and ...

Kevin Sapper
Jun 13, 2016 at 7:04 am
Jun 13, 2016 at 2:26 pm

2	[zeromq-dev] pyzmq pubsub: Address already in use

I'm making a pyzmq app which uses the publisher-subscribe pattern and when I setup a zeromq device in a controller class, I'm not able to cleanup the port and on next run I get the `Address already ...

Mazzaroth M.
Jun 11, 2016 at 11:14 pm
Jun 14, 2016 at 5:22 am

1	[zeromq-dev] message deliver time, PAIR, REQ-REP

Hi all I'm thinking about using zmq as the basic communication mechanism for an LTE protocol stack implementation. First I wanted to measure average time messages of various size need to be ...

Maciej Wewior
Jun 10, 2016 at 9:13 am
Jun 10, 2016 at 12:25 pm

1	[zeromq-dev] Regarding Issue in Initialising Repeated Fields

Dear Team, Please find my detailed problem: I have a schema which handles repeated fields as shown below, i am facing problems for Initialising the repeated fields. In my schema, i have one Rack ...

Yogesh fulsunge
Jun 9, 2016 at 4:07 pm
Jun 9, 2016 at 4:40 pm

0	[zeromq-dev] Haskell ZeroMQ (REQ -> Router)

Hi - Could someone please take a look at my StackOverflow question - http://stackoverflow.com/questions/37625833/why-a-zeromq-req-router-example-does-not-receive-any-message ? I'm having issues with ...

Kevin Meredith
Jun 8, 2016 at 8:37 pm
Jun 8, 2016 at 8:37 pm

6	[zeromq-dev] Can't make router router work

I want to enforce a one to one relationship between client and dynamically spawned worker. I asked before on the list and was told to use a router router broker. However, I can't get my code to work ...

Douglas Petican
Jun 8, 2016 at 2:07 pm
Jun 12, 2016 at 7:29 pm

1	[zeromq-dev] ZeroMQ C4 Jenkins/CI Job Setup

Hi - I read about C4 in Pieter's Social Architecture book and http://rfc.zeromq.org/spec:22/. On my work project (web service), I'd like to move forward with C4's branching, i.e. a single `master` ...

Kevin Meredith
Jun 3, 2016 at 8:15 pm
Jun 5, 2016 at 8:25 am

1	[zeromq-dev] XPUB/XSUB subscriptions and protocol differences between 3.0 and 3.1

Hi, I've been working on a Python asyncio-native implementation of ZMTP during the past weeks. So far everything is going great, but as I wrote interoperability tests with pyzmq, I stumbled on a ...

Julien Kauffmann
Jun 1, 2016 at 12:46 pm
Jun 2, 2016 at 7:22 am

1	[zeromq-dev] Regarding Push Pull Pattern

Dear Team, Can you please let me know if it is possible to connect multiple clients to push messages using push socket to single pull socket?? PUSH --------- PUSH2-------- PULL ------------- ...

Yogesh fulsunge
Jun 1, 2016 at 9:02 am
Jun 1, 2016 at 9:55 am

3	[zeromq-dev] Looking for C++ and Java APIs for sending large messages around 15 MB

Dear Team, I am looking for zeromq apis in C++ and java for sending large message sizes around 15 MB in one request. I would like to know if multipart message is the only option to send messages of ...

Yogesh fulsunge
Jun 1, 2016 at 6:14 am
Jun 2, 2016 at 7:22 am

0	[zeromq-dev] connect doesnt' throw an error but binding to an address does

Hello, I'm tunneling into a machine, and binding the remote port 3000 to the local port 3000, but unfortunately I'm receiving an error when I start the server: ```zmq.error.ZMQError: Address already ...

William david
Jun 1, 2016 at 12:31 am
Jun 1, 2016 at 12:31 am

4	[zeromq-dev] Mailing List

Apologies but I think I'm on this mailing list by accident can I please be removed? Thanks, -- Anthea Middleton Fractalise Web Design <http://fractalise.com Anthea's Thoughts on Nice Things (blog) ...

Anthea Middleton
May 31, 2016 at 12:58 pm
May 31, 2016 at 1:59 pm

2	[zeromq-dev] Unsubscribe from all topics

hi! is there an option to unsubscribe from ALL topics? I have found void zsocket_set_unsubscribe (void *zocket, char * unsubscribe); Is the only option to save all topics and then unsubscribe from ...

Bachmair Florian - flexSolution GmbH
May 31, 2016 at 11:45 am
May 31, 2016 at 1:14 pm

11	[zeromq-dev] [RFC] systemd socket activation for libzmq

Hi, Ale's thread about Setting privileges on a UNIX socket inspired me to create small patch to libzmq adding automatic systemd socket activation support. https://github.com/zeromq/libzmq/pull/2015 ...

Michal Vyskocil
May 30, 2016 at 7:14 pm
May 31, 2016 at 8:46 pm

1	[zeromq-dev] Sporadic failures in unit tests

Hello, There appears to be a sporadic but consistent failure in unit tests with ZeroMQ 4.1.4 on SUSE's Open Build Service [1] [ 98s] FAIL: test_monitor [ 98s] ================== [ 98s] [ 98s] ...

Adam Majer
May 30, 2016 at 11:00 am
May 30, 2016 at 2:45 pm

1	[zeromq-dev] Help with my router/dealer broker similar to majordomo

First off I'm really impressed with zeromq. I've been working with it since yesterday and already I can amazing stuff. Thx for making it. I think I'm trying to do something similar to a majordomo ...

Douglas Petican
May 27, 2016 at 11:46 pm
May 29, 2016 at 11:49 am

3	[zeromq-dev] Regarding Pattern for Replacing CORBA with Zeromq + Protocol Buffers

Dears, I am working on a design to replace CORBA interface between java swing clients ( around 1200) and C++ middleware Server in a distributed application environment. I have decided to use zeroMQ ...

Yogesh fulsunge
May 26, 2016 at 2:21 pm
Jun 1, 2016 at 5:57 am

5	[zeromq-dev] download.zeromq.org: last call

This is the "last call" for download.zeromq.org. If you want anything off: http://download.zeromq.org/ which you don't already have, please download it ASAP. The VM hosting it (an iMatix VM) will be ...

Ewen McNeill
May 26, 2016 at 3:24 am
May 30, 2016 at 4:13 am

0	[zeromq-dev] zmq_msg_init_size corrupts data on my system

I have a very simple set of test programs in C as I am learning ZeroMQ and evaluating it for a project. My first program set uses zmq_send (PUB) and zmq_recv (SUB). This seems to work fine. My second ...

Wade Hampton
May 25, 2016 at 3:45 pm
May 25, 2016 at 3:45 pm

11	[zeromq-dev] Setting privileges on a UNIX socket

Hi all, For my program, I am using the ipc protocol. The unix socket used needs to be accessible to various programs run by different users, so I want to set group write privileges. How can I do ...

Ale Strooisma
May 25, 2016 at 10:32 am
May 27, 2016 at 9:30 am

2	[zeromq-dev] ZMQ on exercism.io?

Hi, I?m playing a bit with http://exercism.io which is quite nice and wonder if it would make sense to come up with some exercises on ZeroMQ? Probably needs some talking to the makers since ...

Dinu Gherman
May 25, 2016 at 10:23 am
May 26, 2016 at 9:03 pm

2	[zeromq-dev] vector io for TCP sockets

Hi, I have been thinking on how to change the stream_engine_t class to use vector io to save copying the message data into the send buffer. The basic idea is to send the data directly from the ...

Auer, Jens
May 24, 2016 at 1:22 pm
May 30, 2016 at 6:58 am

5	[zeromq-dev] ZeroMQ STREAM Socket Type

Hello, Long story short, I have code that works that I now need to refactor. The networking for my application has changed and I need to push my ZeroMQ messages over a half-duplex (i.e., one way) ...

Peter Witkowski
May 23, 2016 at 8:58 pm
May 25, 2016 at 9:41 am

2	[zeromq-dev] Libzmq binaries in conan.io

Hi! I am currently building and packaging almost 100 different binaries of libzmq (4.1.1) for different OSs and configurations for Conan.io package manager (FOSS, disclaimer, I am one of the ...

James
May 23, 2016 at 4:12 am
May 23, 2016 at 6:16 am

0	[zeromq-dev] UnmanagedLibrary[libzmq] Unable to load binary "libzmq" from folders

Hi I am using zeromq 4.1.0.21 library in a c# application. In development pc everything is ok and works like a charm. In target pc I get the following exception: UnmanagedLibrary[libzmq] Unable to ...

Mortazavi
May 23, 2016 at 3:09 am
May 23, 2016 at 3:09 am

11	[zeromq-dev] Fwd: 37/ZMTP RFC inconsistencies

Hi there! I'm working my way through an implementation of 37/ZMTP ( http://rfc.zeromq.org/spec:37) and there's a few inconsistencies in the spec, mostly the timing of message exchanges, and how it ...

Elliot Crosby-McCullough
May 22, 2016 at 8:54 am
May 24, 2016 at 6:41 am

3	[zeromq-dev] message queuing with zeromq

Good evening! I am very new to zeromq. Could you suggest me a ready-made solution for this? I administer a couple of servers with fail2ban. Fail2ban sends a lot of notification emails. These servers ...

SZÉPE Viktor
May 19, 2016 at 9:58 pm
May 20, 2016 at 10:14 am

7	[zeromq-dev] Meetup in Brussels, June 4th

Hi All, I'd like to invite anyone who's in the neighborhood to join an all-day meetup/patch party on June 4th in Brussels. The address is Rue des Ateliers 15. No registration necessary. There will be ...

Pieter Hintjens
May 19, 2016 at 2:55 pm
Jun 2, 2016 at 3:27 pm

2	[zeromq-dev] native select call

This must have been asked many times and I recall working with it before but was it possible to use a normal/native/regular select call on a zmq socket? I know about the edge and level triggering but ...

Arnaud Loonstra
May 19, 2016 at 1:52 pm
May 24, 2016 at 3:56 pm

2	[zeromq-dev] A home for universal, cross-project protocols

Hi, I had a thought that some of the protocols designed by ZeroMQ and other communities have really outgrown their communities and would really benefit from a better exposure to the general public as ...

Yurii Rashkovskii
May 18, 2016 at 9:19 am
May 18, 2016 at 12:26 pm

19	[zeromq-dev] RFC in Markdown?

Hi, I was wondering if any thought has been given to (potentially) using Markdown as a format for RFCs? Pieter asked me if I can ask this question on the mailing list ...

Yurii Rashkovskii
May 18, 2016 at 4:07 am
May 27, 2016 at 5:42 pm

3	[zeromq-dev] ZeroMQ cheatsheet

Hello, I have put together a cheatsheet about ZeroMQ sockets: https://docs.google.com/spreadsheets/d/1HEmeXmKxcX7fiWKwlpTQHE_WjnqgzUek91pz4xPsb5w/edit?usp=sharing I extracted the info from the doc ...

Axel Voitier
May 16, 2016 at 12:15 pm
May 16, 2016 at 3:08 pm

1	[zeromq-dev] Is there a way to avoid sleep operation before sending messages ?

Hi, I am now working on a simple case where a multi-threaded program tries to send a message to a proxy. The program is written in C and the czmq-3.0.2_3 is used. The platform is Mac OS X. Here is ...

Teng Zhang
May 15, 2016 at 9:49 pm
May 16, 2016 at 6:39 am

3	[zeromq-dev] Regarding UDP engine and RAW sockets

Hello everyone. I'm investigating the possibility to add UDP raw (datagram) sockets to ZeroMQ, for compatibility with applications that use the BSD Sockets API directly, replicating what is done for ...

Leonardo José Consoni
May 14, 2016 at 6:19 am
May 15, 2016 at 1:38 pm

1	[zeromq-dev] Malamute consumer cancel a pattern

Hi, Is there an option to cancel/unsubscribe what the consumer subscribes to For eg. If I have mlm_client_set_consumer (reader1, "weather", "newyork"); mlm_client_set_consumer (reader2, "weather", ...

Kumar Anand
May 13, 2016 at 2:10 pm
May 13, 2016 at 2:42 pm

0	[zeromq-dev] ZeroMQ and master thesis

Note: this mail does not regard ZeroMQ development directly! Hello ZMQers, some of you know me from our various C projects. I'm currently in the last master semester before being be able to write the ...

Kevin Sapper
May 13, 2016 at 1:01 pm
May 13, 2016 at 1:01 pm

4	[zeromq-dev] identifying a subscriber with xpub xsub

Hi I wanted to know how I can identify a subscriber. What I want to do control which topics a client can subscribe to on the server. I was thinking of using the XPUB/XSUB proxy and then forwarding ...

Sachin Agrawal
May 12, 2016 at 2:40 pm
May 13, 2016 at 10:21 am

1	[zeromq-dev] bidirectionnal rpc

Hi, for a simulation project I have a classic Client Server model like, but the server should also be able to retrieve informations from client. The number of clients is static. At first I thought ...

Jean rouquet
May 12, 2016 at 11:21 am
May 12, 2016 at 2:19 pm

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