Re: Sharing a file between Mac and iOS
Re: Sharing a file between Mac and iOS
- Subject: Re: Sharing a file between Mac and iOS
- From: Jerry Krinock <email@hidden>
- Date: Thu, 19 Jul 2012 18:18:00 -0700
On 2012 Jul 19, at 11:32, Jens Alfke wrote:
> every time you make a change, the entire file will have to be uploaded [by Dropbox] (and downloaded on the other devices) so this doesn't scale well.
I tested this about a year ago and found otherwise. Drag a large file into your Dropbox. Say that it takes 5 minutes to transfer to your other device. Do the bits/second math with your internet connection speed and verify that the transmission time is about as expected. Now change a few bits in the file. Voila! The other device is updated within seconds. Dropbox apparently transmits only changed blocks. Very nice.
What's even better, is that I found it also works that way with a Core Data sqlite store. Changing one record in a large store does not transmit the whole store.
> it won't resolve conflicts in the file. So if one database row gets changed on one device, and another one on another device, Dropbox is just going to go 'duh' and give you two copies of the file, one with each change.
That is correct. Dropbox "syncing" works good for "multi-device" situations, not "multi-user". But that is good enough for most consumer applications.
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