>>   You might notice a difference in disk usage if you have enormous
>> amounts of small files. (In a non-compacting FS every file takes a
>> multiple of 4 kB, rounded up. With ReiserFS they can take less. For
>> example if you have 1000 files, each one 128 bytes in length, instead
>> of taking 4 MB of disk space they only take 128 kB.)
> 
> Interestingly enough, in NTFS, if all the data fits in the same sector 
> as the inode[1], it goes into the same sector.

...which the result that if you have many hundreds of tiny files in a 
single directory... the directory structure becomes rather large and 
slow to traverse. ;-) (Still better than wasting half your harddrive 
though!)

>>   There might be some file systems which support additional permissions,
>> but I don't remember right now.
> 
> There are, and yes, they aren't especially well supported, especially by 
> things like rsync, svn, backup programs, etc.

I thought that would be problematic. ;-) But it at least exists though?

-- 
http://blog.orphi.me.uk/
http://www.zazzle.com/MathematicalOrchid*

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