[zeromq-dev] Problem with fileserver / fileclient

Pieter Hintjens ph at imatix.com
Mon Nov 19 02:23:28 CET 2012


I've updated the doc to make this clear, and will change the examples
in the Guide accordingly.

Thanks for spotting this problem!

https://github.com/hintjens/libzmq/commit/7533ebb33d1cc6f23061e0228bf7eb22713aaa17

-Pieter

On Mon, Nov 19, 2012 at 10:01 AM, Pieter Hintjens <ph at imatix.com> wrote:
> Stathis,
>
> I've tested this in detail.
>
> Tthere seems to be a problem with the HWM in the ROUTER, which is
> dropping outgoing messages unexpectedly. That is, the HWM setting of
> 10 isn't actually enough for 10 outgoing messages.
>
> What it looks like is that the HWM is in fact per message frame, not
> per message. So in this case you'd have to use:
>
>     zsocket_set_hwm (router, PIPELINE * 2);
>
> In the router since the identity frame is counted in the HWM calculation.
>
> This is a bug IMO, or at least it's rather surprising.
>
> -Pieter
>
>
>
>
> On Mon, Nov 19, 2012 at 3:13 AM, Stathis Gkotsis
> <stathis.gkotsis at commsquare.com> wrote:
>> Indeed, sorry about this, here are the two links to the code:
>>
>> http://pastebin.com/1DLa4e2J
>> http://pastebin.com/cbJUxJB4
>>
>> Thanks,
>> Stathis
>> ________________________________________
>> From: zeromq-dev-bounces at lists.zeromq.org [zeromq-dev-bounces at lists.zeromq.org] On Behalf Of Min [miniway at gmail.com]
>> Sent: Sunday, November 18, 2012 7:36 PM
>> To: ZeroMQ development list
>> Subject: Re: [zeromq-dev] Problem with fileserver / fileclient
>>
>> The two links seem to be identical.
>>
>> Could you upload the client code also ?
>>
>> Thanks
>> Min
>>
>>
>> On Mon, Nov 19, 2012 at 1:22 AM, Stathis Gkotsis <stathis.gkotsis at commsquare.com<mailto:stathis.gkotsis at commsquare.com>> wrote:
>> Hello,
>>
>>    I am using zeromq v3.2.1-RC2 on Ubuntu 10.04 / Ubuntu 12.04 64bit. I created two simple apps: one fileserver and one fileclient, based on the "File Transfer" example code in the documentation (http://zguide.zeromq.org/page:all#header-151 , model 3). The code for these two example apps can be found here: http://pastebin.com/AuGU9EDC and here: http://pastebin.com/LusbjGCa . As you can see, I use a file of 100KB.
>>
>> The problem is that when I start the server and then run the client multiple times, sometimes it receives less than 102400 bytes, like: 98304 or 94208 or 90112 bytes. For example, when I run the client 1000 times with an interval of 100ms between the runs, for 970 runs it receives 12400 bytes, while for the rest (30 runs) it receives less bytes. I am bit puzzled by this, could you help?
>>
>> Thanks,
>> Stathis
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>>
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