[zeromq-dev] thoughts on pub-sub messaging and "reliability"

Dorvin dorvin at tlen.pl
Mon Oct 20 11:39:38 CEST 2014

W dniu 2014-10-20 10:50, Holger Joukl pisze:
> Sadly and as often the case this term is used with multiple meanings
> in different contexts, see e.g. the QoS definitions of the MQTT protocol:
> http://public.dhe.ibm.com/software/dw/webservices/ws-mqtt/MQTT_V3.1_Protocol_Specific.pdf
There are lots of similar situations between groups (f.e. windows admins 
vs programmers vs networking guys). More funny is that these happen in 
one group, too. F.e. "trunk" means completely different thing with Cisco 
switches and HP switches. Since name "QoS" hasn't yet been popularized 
in 0MQ community and this is networking software it seems sensible to 
not get used to it in confusing context.

The only thing you need to do about QoS is to tell your network admins 
to reserve you some bandwidth or complain about slow transfer and packet 
drops. :)

> I don't know where the term first originated from but I agree
> it's best to avoid confusion. So maybe "delivery guarantees" or
> "reliability level" might be better words.

Reliability sounds just fine. But use whatever suits you if it's not QoS. :)

With regards,

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