On 16/07/2012, at 18:39, Jens Alfke wrote:
> In my experience — and yes I have tried it — using DO between multiple
> computers is a nightmare. I know it sounds so simple and appealing, but
> that's because it tries to sweep all the hard problems of networking[1] under
> the rug. The problems remain, and will bite you, hard.
>
> [...]
>
> The bad news: Approach #1 is straightforward but means you have to abandon
> Core Data on the client, and design and implement your own network protocol,
> which is time-consuming. Approach #2 is lovely when it works but I assure you
> from experience that synchronization is very, very difficult to implement
> from scratch.
Well... This is one of the more down-to-earth arguments about why I should
steer away from this technique. Coming from you, Jens, I can't ignore it.
> I hate to make this post sound like an ad, but I'm developing (for my
> employer, Couchbase) a framework that implements #2. It's based on
> CouchDB[2], a very popular nonrelational ("NoSQL") distributed database that
> is really, really good at synchronization. My framework, TouchDB,[3] lets Mac
> or iOS or Android apps store databases locally, operate on them locally, and
> then replicate in real time with a CouchDB server. If there are multiple
> clients syncing with the same server, it's exactly the solution #2 I outlined
> above.
I've just took a look at the links you sent and I'm downloading TouchDB. I'll
have a careful look at it soon.
> Now, TouchDB isn't compatible with Core Data. But it does have a pretty solid
> Cocoa API that has an object-model layer a bit like a simplified Core Data.
> The people who've been using it like it a lot.
To be honest, I know a little about Cocoa and can write almost any simple app
you can imagine. Core Data is not, by any measure, a simple framework. I think
I understand it, so it feels comfortable for me to try and stick with it. But
it doesn't have to be Core Data. It must be Cocoa, though.
Cheers,
Flavio
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