[zeromq-dev] Odd numbers with zeromq

Apostolis Xekoukoulotakis xekoukou at gmail.com
Wed Sep 19 06:21:46 CEST 2012


If you want to acknowledge a msg but each msg is independent of each other,
use Router/dealer.
There is nothing else you can do.

2012/9/19 Bennie Kloosteman <bklooste at gmail.com>

> If you wait for responses you have to wait on  latency which can get much
> worse eg international 250ms  your limit is 4 messages per second.  You
> cannot do better
>
> That why people build asynch systems...and why Doom/Quake use to spam UDP
> position updates - without waiting for an answer.
>
> Ben
>
>
> On Wed, Sep 19, 2012 at 11:21 AM, Maninder Batth <whatpuzzlesme at gmail.com>wrote:
>
>> Paul,
>> With messages being sent one way, via pub and sub sockets, i am getting a
>> very decent performance. About 80% of our network gets saturated.
>> The code is zserver.cpp and zclient.cpp
>>
>> But if i configure the software such that client only sends the next
>> message, after it has received a response from the server, the throughput
>>  is really bad.
>> The code is zserver-ack1.cpp  and zclient-ack1.cpp
>> The difference is that in the former case, i can get 110k messages per
>> second , whereas in the latter case,  i can only get 1k messages per second.
>> The sockets that i use in latter case are of type REQ and REP. Am i using
>> wrong sockets type ?
>>
>>
>>
>> On Tue, Sep 18, 2012 at 9:38 PM, Maninder Batth <whatpuzzlesme at gmail.com>wrote:
>>
>>> Paul,
>>> Thank you again for your help. Now with message copying, i am getting a
>>> throughput of .8Gb, which is what i would have expected on a 1Gb network.
>>>
>>>
>>> On Tue, Sep 18, 2012 at 4:20 PM, Paul Colomiets <paul at colomiets.name>wrote:
>>>
>>>> Hi Maninder,
>>>>
>>>> On Tue, Sep 18, 2012 at 10:21 PM, Maninder Batth
>>>> <whatpuzzlesme at gmail.com> wrote:
>>>> > Paul,
>>>> > Here is number of messages as seen by the server in one second. Each
>>>> message
>>>> > is 1024 byte excluding tcp/ip and zmq headers. Based on these numbers
>>>> and i
>>>> > am getting a throughput of 1.4 Gb/sec.
>>>> > Enclosed is the source code for the server and the client.
>>>> >
>>>>
>>>> Zeromq closes the message after sending. So you effectively send
>>>> messages of the zero length after first one. You should use
>>>> zmq_msg_copy (or whatever C++ API is there) before  doing send() in
>>>> case you want to reuse message.
>>>>
>>>> --
>>>> Paul
>>>> _______________________________________________
>>>> zeromq-dev mailing list
>>>> zeromq-dev at lists.zeromq.org
>>>> http://lists.zeromq.org/mailman/listinfo/zeromq-dev
>>>>
>>>
>>>
>>
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>>
>
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-- 


Sincerely yours,

     Apostolis Xekoukoulotakis
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