On 26 Mar 2014, at 10:13, Colas B <colasj...@yahoo.fr> wrote:

> 
> Yes indeed, 
> 
> I'm using this method to manage additional data in a document.
> Want you say Mike frightens me a little bit, I would not want all my memory 
> used my extra files when I save the document.
> 
> Which options should I use if I want the file wrapper to read/write as less 
> as possible when I update this additional data on the disk? Is there a 
> special procedure to follow if I want to remove a file from the additional 
> data on the disk?
> 

If you’re writing a directory (package), and pass in a suitable original URL, 
NSFileWrapper will do its best to write hard links for any files it detects 
haven’t changed.

I should probably point out that NSFileWrapper can be configured to use memory 
mapping, which may lower the memory requirements for your app.
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