Re: Two questions on CoreData
Re: Two questions on CoreData
- Subject: Re: Two questions on CoreData
- From: email@hidden
- Date: Fri, 4 Nov 2005 14:43:23 +0200
Dear List
Thanks for all the pointers. On a lighter note, how on earth do you
guys know all this stuff. You must LIVE on the web, but thank
goodness you do !
Vince
>
>
>
>---- Original Message ----
>From: email@hidden
>To: email@hidden
>Subject: Re: Two questions on CoreData
>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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