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Re: [mosquitto-dev] restart of large messages...

Hi Tommy,

in general with MQTT, the answer is no.  Any fragmentation is done at the TCP level.  If you want to achieve this you have to do it at the application level by splitting the payload into smaller chunks and send each separately in an MQTT publish.  MQTT was designed primarily with smaller payloads in mind.  The lack of such features is what helps to keep MQTT small, so it does have an upside :-)


On 08/21/2014 03:17 PM, Tommy Svensson wrote:

maximum publish payload size is 256MB. I cannot see anything in the spec, therefore I ask if there is a restart mechanism in Mosquitto/MQTT so that the entire message does not have to be resent in case of a network disconnect; instead the message transfer is restarted where it left off when network connection has been reestablished?


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Ian Craggs                          
icraggs@xxxxxxxxxx                 IBM United Kingdom
Committer on Paho, Mosquitto

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