Re: [mosquitto-dev] Suggestion regarding `persistent_client_expiration`

[Karl Palsson <karlp@xxxxxxxxxxxx>]

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Are you trying to use client expiry to toss out queued messages?  That
sounds like a risky path.     If you want such short lived clients, why
make them durable clients at all?  With a keepalive for the connection
of 5-10 seconds, (very short) what would be the point in expiring
clients in anything less than a minute?

I  can sort of see the use in hours, but really, if you need them that
short, I don't know why you are using durable clients at all.  

I really don't see how client expiration has any bearing on response
time to data either.

Sincerely,
Karl P

Felipe de Andrade Neves Lavratti <felipelav@xxxxxxxxx> wrote:
> The configuration key `persistent_client_expiration` has its minimum
> value of 1 day.
> 
> There are network contexts, including the one I use Mosquitto with,
> where valid data has the expiration time lower than 1 day, for
> example, actuators in a real time network, where the network must
> respond in a time window of seconds to the user input.
> 
> If the configuration key `persistent_client_expiration` accepted
> _seconds_ and _minutes_ as valid value. Clients, in these real time
> networks, could catch only not expired data from the broker in the
> events of the connection getting dropped and re-established again.
> 
> To make it short:
> My suggestion is that `persistent_client_expiration` get implemented
> to work with time windows from 1 sec.
> 
> I can do the coding, just need to know if it is a welcome change.
> 
> Thanks!
> 

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