[zeromq-dev] Odd numbers with zeromq

Maninder Batth whatpuzzlesme at gmail.com
Wed Sep 19 05:21:01 CEST 2012


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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