Hi Chris, On 23/09/2010, at 04:27, Chris Hanson wrote:
> On Sep 22, 2010, at 11:39 PM, Tito Ciuro wrote: > >> I believe (please correct me if I'm wrong) that Core Data stores the data >> atomically for both, XML and binary formats. That, if I'm not mistaken >> requires the datafile to be read in memory. Not so with NanoStore: > > Not really so with Core Data either. > > Core Data has the concept of both atomic and non-atomic persistent stores. > > Core Data’s binary and XML persistent stores are atomic, so they are read and > written like documents (all at once). Developers can also create your own > kinds of atomic persistent stores by subclassing NSAtomicStore. (Also, the > XML persistent store is not available on iOS, only on Mac OS X.) > > Core Data’s SQLite persistent store is quite explicitly not atomic: It uses > transactions against SQLite. The entire persistent store does not need to be > read into memory, only the data requested; the entire persistent store is not > written upon a save, only the data changed. > > -- Chris As I mentioned to Thomas, I left part of the sentence out, so thanks for clarifying this. What I meant was precisely what you have written so eloquently. NanoStore is also explicitly not atomic: It uses transactions against SQLite as well storing and indexing the dictionaries. Thanks Chris, -- Tito_______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
