Re: Shared CoreData DataModel and DB file..
Re: Shared CoreData DataModel and DB file..
- Subject: Re: Shared CoreData DataModel and DB file..
- From: Mike Abdullah <email@hidden>
- Date: Mon, 28 Dec 2009 18:29:56 +0000
But from remote and local machine at once? This sounds dangerously like a multi-user setup which Core Data is very much NOT designed for. Trying to force it will only result in pain later.
On 28 Dec 2009, at 18:19, Robert Monaghan wrote:
> Nice! I suspected as much.
>
> So, I should implement a file lock mechanism, as well, then. I have every reason to believe that people would use the database file over a network filesystem.
>
> bob..
>
>
> On Dec 28, 2009, at 10:09 AM, Mike Abdullah wrote:
>
>> Yes. If you use the SQLite store, it automatically uses filesystem locking. Indeed, that is how CalendarStore and AddressBook operate under the hood these days I believe.
>>
>> The major caveat is that the locking doesn't work if the file is accessed from two different filesystems. i.e. a local file which another machine is also trying to access over the network at the same time.
>>
>> Mike.
>>
>> On 28 Dec 2009, at 17:50, Robert Monaghan wrote:
>>
>>> Is it possible to share a DataModel and resulting db file between 2 apps?
>>> If so, what sort of pitfalls are present?
>>>
>>> I want to create an App that creates the DB file, and a plugin for another App, that reads the database file.
>>>
>>> Thanks!
>>>
>>> bob..
>>>
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>
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