[zeromq-dev] Check if message is dropped due to HWM at send in ZeroMQ PUB-SUB pattern

[Pieter Hintjens]

Certified messaging, yes, but not for pub-sub. Spam is spam.
Registered mail is registered mail. However when post offices burn
down, even registered mail gets lost.

On Thu, Oct 16, 2014 at 4:32 PM, Holger Joukl <Holger.Joukl at lbbw.de> wrote:
>> Von: Pieter Hintjens
>>
>> By magic coincidence I'm sketching out a proposal for reliable pub-sub.
>>
>> https://github.com/zeromq/zeps
>>
>
> What would be the appeal of having a centralized ZeroMQ broker as opposed
> to just using some existing out-of-the box solution, probably (I almost
> dare not say it ;-) AMQP-based, e.g. RabbitMQ or QPid?
>
> Apart from the obvious ZeroMQ goodness e.g. ubiquituous client/language
> support and
> probably a better world in general...
>
> As with the aforementioned (or JMS or anything else using centralized
> persistent
> queues) this would inevitably introduce a single point of failure that
> would then
> need to be safeguarded with clustering, high availability, cold/hot
> standby, you name it.
>
> Then, of course you'd need to deal with avoiding or recovering from queue
> inconsistencies in case of broker failure and resulting switchover and
> such.
>
> Looks to me like this is not an easily-solved problem even for some of
> those
> rather established (as in available for quite a long time) solutions.
>
> If you need a strong notion of guaranteed or certified messaging that is,
> as in:
> Never lose a single message. Ever.
> (Yes I know it's really only "as close as you can get to 'never' and
> 'ever'")
>
> Best regards,
> Holger
>
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