Re: Here is the results of my last question...

[Chris Wedgwood <cw@xxxxxxxx>]

On Fri, Oct 25, 2002 at 08:27:27PM +0200, Andi Kleen wrote:

> The right thing would be to change the downloader assistant to use
> XFS' file preallocation ioctls so that it allocates the full space
> in advance. Unfortuately they are not fully implemented on linux/xfs
> and are only available for root currently. I would be possible to
> create the file first and fill it with zeroes. This way you should
> get few extents.

It would be pretty cheap for the downloader to actually just touch
lseek/touch ahead a few MB of each writer too, this would be almost as
easy to code and would work on other filesystems.


  --cw