Re: Two questions on CoreData
Re: Two questions on CoreData
- Subject: Re: Two questions on CoreData
- From: mmalcolm crawford <email@hidden>
- Date: Wed, 2 Nov 2005 10:12:53 -0800
On Nov 2, 2005, at 9:41 AM, Vincent Coetzee wrote:
1. Does anyone have an idea of how to migrate a schema, in other
words, short of writing masses of code how does one migrate data
from one schema version to another ?
See <http://www.cocoabuilder.com/archive/message/cocoa/
2005/5/11/135606>, and <http://developer.apple.com/documentation/
Cocoa/Conceptual/CoreData/Articles/cdVersioning.html>.
2. I have been using an SQLLite type store for an app of mine and
wondered what the performance characteristics of an SQLLite store
are as the data set grows ?
See <http://developer.apple.com/documentation/Cocoa/Conceptual/
CoreData/Articles/cdFAQ.html#//apple_ref/doc/uid/TP40001802-
DontLinkElementID_16> and <http://developer.apple.com/documentation/
Cocoa/Conceptual/CoreData/Articles/cdPersistentStores.html>.
Core Data adds some overhead, but (a) the overhead is not
particularly large, and (b) a major advantage of the SQLite store is
that it "does not require that the entire object graph reside in
memory".
mmalc
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