Re: Allocations for zero length files

[Shailendra Tripathi <stripathi@xxxxxxxxx>]

Hi Karl,
	The length will be limited to in this case to standard XFS name limit 
of 255 as you appear to be interested in regular file names. The 
difference is in symbolic links. If symbolic link is less than a 
constant,  it is stored on the inode itself. This constant is dependent 
upon the inodesize(In presence of extended attributes, this constant is 
dependent upon some other factor as well). For example, with 256 
inodesize, the maximum which you can possibly store as symbolic link is 
156 bytes name.

Regards,
Shailendra

Karl O. Pinc wrote:
> Hi,
>
> If I make a zero length file in xfs is any disk allocated for the
> data portion?  I'm thinking of storing lots (units of 10**6) of
> small keys as empty files with names that are the keys.
>
> I suppose some keys could be larger, is there a limit on filename
> length?
>
> (Thanks for not making me go to the trouble of coming up with
> some free partition space to try this out.  I'm afriad
> of loopback mount lockups, although maybe that was
> all related to Linux 2.4.)
>
>
> Karl <kop@xxxxxxxx>
> Free Software:  "You don't pay back, you pay forward."
>                  -- Robert A. Heinlein