On Jun 3, 2011, at 1:29 PM, Evadne Wu wrote: > As for the SQLite file, I am never sure if Core Data’s OS X implementation > and iOS implementation share the same format and will continue to be so
SQLite’s file format is 100% consistent cross-platform. And I have no reason to think the same’s not true of CoreData’s schema, since it’s supposed to be compatible between OS’s. > Note that Dropbox exposes directory hashes, so that might help with images. > I’m not sure if referenced images would be updated at all — this can be a big > problem if they can be updated outside the app and you need to handle that. If you make the application’s store a directory and put the images in it as well as the CoreData file, and if you sync the whole directory with Dropbox, it should Just Work. > For the record, going with Dropbox might not be very safe, could be not > scalable at all, and might have security implications as Jeffrey pointed out. > Dropbox has been quite safe and scalable in my experience. I’ve been using it for a lot of my data for two years, have never lost data or gotten files messed up, and I can’t think of the last time it didn’t sync in a timely manner. The security issues are overblown due to the recent fracas. Yes, your files could theoretically be accessed by their employees or requested by the FBI. The same thing is true of your email, your iDisk, your Google Docs/Sites/Spreadsheets, any software running on your hosted web space, and anything else you put up in “the Cloud”. If you’re super paranoid you can encrypt and decrypt the files locally; but then you run into the complications of key management and transfer … which is one of the reasons cloud services don’t go as far as to do this. > But it might work very well for your scenario. If you’re serious about > making it robust, I still recommend that you create a tiny and dedicated web > service for this app… I understand your point, but in practice, a service designed and run by professionals is going to be more reliable than a quickie web-app cobbled together in your spare time. (What’s the least reliable blog site I’ve ever used? The private WordPress installation I run on my domain. Mostly because the @*%$ sysadmin [me] never has the time to upgrade or fix it…) —Jens
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