Re: [mosquitto-dev] Cassandra as a retained message store

[Roger Light <roger@xxxxxxxxxx>]

Hi Michael,

I'd definitely be interested to hear more.

Regards,

Roger


On Wed, Nov 26, 2014 at 3:23 PM, Laing, Michael
<michael.laing@xxxxxxxxxxx> wrote:
> I am experimenting with MQTT as a way to extend the nytfabrik at the edge,
> complementing and perhaps replacing our custom WebSocket/SockJS protocol.
>
> We use RabbitMQ with topic routing on the nytfabrik global backbone mesh, so
> we are familiar with wildcarding, subscription, etc.
>
> And we have lots of 'retained' messages - 10's of millions growing to 100's
> of millions.
>
> This is no problem for Cassandra but, as we look to support MQTT, we need a
> technical solution for query with wildcards on retained messages.
>
> Cassandra has a limited query language but can be very fast. I was looking
> for a way to run 'close to the metal' (no additional layers) and now have a
> working prototype architecture and algorithms for store and query that are
> simple, fast and which scale. So I think that technical blocker is overcome
> for our usage cases.
>
> Anyway, if this is of interest, I'll keep this list informed, and maybe
> solicit some advice.
>
> We're not sure yet how we'll add MQTT to the nytfabrik, but most likely we
> would remix mosquitto with our own code, package it up, and run it under
> python on our autoscaling edge instances.
>
> Cheers,
>
> Michael
>
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