> On Jul 12, 2017, at 11:03 AM, David Hoerl <dho...@mac.com> wrote:
>
> Thanks so much for your response! The desired solution is targeted at an
> environment that currently uses "Firebase". The problem now is that if the
> iOS devices lose internet access, the whole network goes down.
>
> The application is as follows. A few up to say 16 iOS devices need to
> communicate to each other to keep all devices synced to a distributed data
> set - something that changes over time, but doesn't require a lot of
> bandwidth. A contrived example: a local farmers market has a standalone WIFI
> network. At a very slow rate, new sellers show up, and some leave. When a new
> seller shows up, their iPad goes on line, uses Bonjour to find all other
> sellers on the network.
I’m not usually the type to plug my employer’s product … but you’re actually
describing a great use case of Couchbase Lite, of which I’m the architect and
tech lead. (And it is a genuine open source project, as well as a commercial
product.)
https://github.com/couchbase/couchbase-lite-ios/
<https://github.com/couchbase/couchbase-lite-ios/>
https://www.couchbase.com/products/mobile
<https://www.couchbase.com/products/mobile>
Couchbase Lite actually focuses on the sync portion of the problem (which is
another big can of worms and more difficult than it seems), and its primary
usage is client/server, but it does offer a P2P mode where two clients can sync
with each other instead of a server. The sync protocol is REST-based using
NSURLSession and a GCDAsyncSocket-based HTTP micro-server. This can be extended
by having any combination of clients sync with each other through arbitrary
topologies.
What we don’t offer yet is the discovery and topology layer on top of this —
that’s why I’ve been so interested in this discussion. However, some of our
customers have implemented this layer, and I’ve got a demo version that, as I
said earlier in this thread, should scale acceptably for moderate numbers of
clients and low traffic. I gave a conference presentation about this in 2015:
http://connect15.couchbase.com/agenda/couchbase-mobile-103-building-peer-peer-app-couchbase-mobile/
<http://connect15.couchbase.com/agenda/couchbase-mobile-103-building-peer-peer-app-couchbase-mobile/>
Feel free to contact me directly if you have questions...
—Jens _______________________________________________
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