Re: Question about sparse files

[Nathan Scott <nathans@xxxxxxx>]

Hi John,

On Wed, Jun 14, 2006 at 01:55:27PM -0500, John Groves wrote:
> A question for those who know more about xfs internals than me:
> 
> If want to create sparse files that XFS can handle efficiently, is there 
> an optimal minimum sparse chunk size?  I can look at an data stream for 
> null segments and make them sparse, but I presume I shouldn't make 1 
> byte sparse extents.  File size will range from small to multiple GB, 
> but large files are the norm.

I'd recommend you make your minimum sparse chunk be the filesystem
blocksize.  You can extract this from the statfs(2) f_bsize field.

cheers.

-- 
Nathan