[zeromq-dev] Disable resend of Publisher after reconnection
Bachmair Florian - flexSolution GmbH
florian.bachmair at flexsolution.eu
Thu Aug 27 15:28:46 CEST 2015
I have done this:
I do not get the packages, but a reconnect is also not established...
int alive = 1, alive_idle = 1, alive_probes = 1, alive_intvl = 1;
int rc = zmq_setsockopt(publisher, ZMQ_TCP_KEEPALIVE, &alive, sizeof alive);
assert(rc == 0);
rc = zmq_setsockopt(publisher, ZMQ_TCP_KEEPALIVE_IDLE, &alive_idle,
sizeof alive_idle);
assert(rc == 0);
rc = zmq_setsockopt(publisher, ZMQ_TCP_KEEPALIVE_CNT, &alive_probes,
sizeof alive_probes);
assert(rc == 0);
rc = zmq_setsockopt(publisher, ZMQ_TCP_KEEPALIVE_INTVL, &alive_intvl,
sizeof alive_intvl);
assert(rc == 0);
Am 27.08.2015 um 15:13 schrieb KIU Shueng Chuan:
>
> You could use the tcp keepalive socket options to make the tcp
> connection drop faster once you have unplugged your cable. That should
> cause the queued packets to be dropped.
>
> Or your subscriber could drain the socket of messages by reading it
> until it would block and only process the last one.
>
> On Aug 27, 2015 20:42, "Bachmair Florian - flexSolution GmbH"
> <florian.bachmair at flexsolution.eu
> <mailto:florian.bachmair at flexsolution.eu>> wrote:
>
> ok, thank you!
>
> I have to think about that, because I want to use curve as well,
> and therefore I would need tcp...
>
> Am 27.08.2015 um 14:12 schrieb Sergey Zinov:
>> Seems like that should be the case. TCP is a reliable protocol,
>> it buffers all data till it acknowledged by receiver and resend
>> when needed. Switch to the UDP if don't need that reliability.
>>
>> On 27.08.2015 14:07, Bachmair Florian - flexSolution GmbH wrote:
>>> This does not work either :/
>>>
>>> I'm unsing PUB/SUB via tcp.
>>>
>>> I have captured the tcp connection with tcpdump and I saw that
>>> after I unplug the cable I get tcp retransmission packets.
>>>
>>> May this be more a behaviour of tcp itself than of zmq?
>>>
>>>
>>> Am 27.08.2015 um 13:39 schrieb Sergey Zinov:
>>>> Hi,
>>>>
>>>> Try to set ZMQ_SNDHWM to 1. By the way which transport are you
>>>> using?
>>>>
>>>> On 27.08.2015 11:52, Bachmair Florian - flexSolution GmbH wrote:
>>>>> I tried it, but it does not work!
>>>>>
>>>>> Don't know If I get that right, but even If I set
>>>>> ZMQ_RECONNECT_IV to "-1" my PUB and SUB Sockets are
>>>>> reconnecting to each other after I replug the cable
>>>>>
>>>>> Am 27.08.2015 um 10:59 schrieb Doron Somech:
>>>>>>
>>>>>> I'm not sure, but try to set ZMQ_IMMEDIATE option.
>>>>>>
>>>>>> On Aug 27, 2015 11:38 AM, "Bachmair Florian - flexSolution
>>>>>> GmbH" <florian.bachmair at flexsolution.eu
>>>>>> <mailto:florian.bachmair at flexsolution.eu>> wrote:
>>>>>>
>>>>>> Hello!
>>>>>>
>>>>>> Is there a opportunity to tell the publisher not to
>>>>>> resend messages?
>>>>>>
>>>>>> I have two stations A and B
>>>>>>
>>>>>> A publishes all the time
>>>>>> B receives it
>>>>>>
>>>>>> A-PUB 10
>>>>>> B-SUB 10
>>>>>> A-PUB 20
>>>>>> B-SUB 20
>>>>>> A-PUB 30
>>>>>> B-SUB 30
>>>>>> A-PUB 40
>>>>>> B-SUB 40
>>>>>> ---unplug cable
>>>>>> A-PUB 50
>>>>>> A-PUB 60
>>>>>> A-PUB 70
>>>>>> ---plug cable again
>>>>>> B-SUB 50
>>>>>> B-SUB 60
>>>>>> B-SUB 70
>>>>>> ....
>>>>>>
>>>>>>
>>>>>> B does some routines after it gets those values. But I'm
>>>>>> not interested
>>>>>> in 50 and 60 any more, I just want the 70 after reconnection.
>>>>>> I do Heartbeating so I detect connection lost on my own
>>>>>> and I can
>>>>>> request the last value as well. So is this possible to
>>>>>> disable the
>>>>>> resend mechanism?
>>>>>>
>>>>>> Thx
>>>>>> Florian
>>>>>> _______________________________________________
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>>>>>> zeromq-dev at lists.zeromq.org
>>>>>> <mailto:zeromq-dev at lists.zeromq.org>
>>>>>> http://lists.zeromq.org/mailman/listinfo/zeromq-dev
>>>>>>
>>>>>>
>>>>>>
>>>>>> _______________________________________________
>>>>>> zeromq-dev mailing list
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>>>>>
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> zeromq-dev mailing list
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>>>>> http://lists.zeromq.org/mailman/listinfo/zeromq-dev
>>>>
>>>>
>>>> --
>>>> Sergey Zinov
>>>>
>>>> Wissenschaftlicher Mitarbeiter
>>>> Fachbereich Elektrotechnik, Maschinenbau und Wirtschaftsingenieurwesen
>>>> Hochschule Anhalt
>>>> /
>>>> Research Assistant
>>>> Department of Electrical, Mechanical and Industrial Engineering
>>>> Anhalt University of Applied Sciences
>>>>
>>>> Phone:+4915738145172 <tel:%2B4915738145172>
>>>>
>>>>
>>>> _______________________________________________
>>>> zeromq-dev mailing list
>>>> zeromq-dev at lists.zeromq.org <mailto:zeromq-dev at lists.zeromq.org>
>>>> http://lists.zeromq.org/mailman/listinfo/zeromq-dev
>>>
>>>
>>>
>>> _______________________________________________
>>> zeromq-dev mailing list
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>>> http://lists.zeromq.org/mailman/listinfo/zeromq-dev
>>
>>
>> --
>> Sergey Zinov
>>
>> Wissenschaftlicher Mitarbeiter
>> Fachbereich Elektrotechnik, Maschinenbau und Wirtschaftsingenieurwesen
>> Hochschule Anhalt
>> /
>> Research Assistant
>> Department of Electrical, Mechanical and Industrial Engineering
>> Anhalt University of Applied Sciences
>>
>> Phone:+4915738145172 <tel:%2B4915738145172>
>>
>>
>> _______________________________________________
>> zeromq-dev mailing list
>> zeromq-dev at lists.zeromq.org <mailto:zeromq-dev at lists.zeromq.org>
>> http://lists.zeromq.org/mailman/listinfo/zeromq-dev
>
>
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