[zeromq-dev] ZeroMQ Newbie

[Eric Hill]

http://zguide.zeromq.org/page:all#Multithreading-with-MQ

Contexts are thread safe. Create a new socket in each thread and you'll be
all set.
On Apr 2, 2013 4:38 AM, "A L" <alapex0310 at gmail.com> wrote:

> Hi Eric,
>
> Thanks for replying.
>
> I also want to know if, in addition to using my own thread, I can use
> multiple threads to handle ZMQ.
>
> Best regards,
>
> -Asif
>
>
>
> On Mon, Apr 1, 2013 at 6:44 PM, Eric Hill <eric at ijack.net> wrote:
>
>>
>>
>>> I need to handle something like 8000 messages per second in a Windows
>>> environment. The existing solution handles something like 32000 messages
>>> per second and is based on Windows/IO-Completion ports.
>>>
>>
>> You should write up a test using any of the provided examples in the
>> guide and benchmark your setup.  Messaging throughput is very dependent on
>> your architecture and interconnects.  8000 mps should be easily attainable.
>>  See here for a good benchmarking methodology:
>> http://www.zeromq.org/whitepapers:measuring-performance
>>
>>
>>> To start with, I need to know if I can handle that many messages using a
>>> single-threaded approach with ZMQ as I assume that ZMQ does multi-threading
>>> internally.
>>>
>>
>> Yes.  Unless you're DOING something with the message, in which case the
>> time you take to do something will negatively effect the overall throughput.
>>
>>
>>> Also, I'd like to know if I could do better with multiple threads? How?
>>> I'd be thankful if you could post links to related online articles and
>>> examples.
>>>
>>
>> Again, zmq does a great job at handling the messages.  You need to do
>> YOUR work with whatever threading/IOCP/coroutine/fiber/magic methodology
>> that suits the problem best.
>>
>> In addition, I want to know if I can send each ZMQ message encrypted
>>> using Win32 Crypto API's default RSA provider, RSA_PROV_FULL,  (I don't
>>> know if other open-source alternatives exist to accomplish the same).
>>>
>>
>>  zmq sends opaque messages.  The data you put in the messages can be with
>> whatever encryption you choose.
>>
>>
>>> Finally, what causes the message loss? In which situations can I loose
>>> messages?
>>>
>>
>> Switch latency, router latency, network latency in general, lousy network
>> card, anti-virus programs, cosmic rays, poor orientation to the ether wind,
>> etc.  Message loss happens.  It's your job to minimize it as much as
>> possible, and deal with it when it happens.
>>
>>
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>>
>>
>
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