On Mon, Apr 27, 2009 at 04:00:32PM -0500, Michael Cronenworth wrote:
-------- Original Message --------
Subject: Re: Things to do this week instead of arguing about mixers
From: Eric Sandeen <sandeen(a)redhat.com>
To: Development discussions related to Fedora <fedora-devel-list(a)redhat.com>
Date: 04/27/2009 03:53 PM
>
> Try downloading a large (multi-gigabyte) torrent on ext4 or xfs or
> btrfs; see what the resulting file layout looks like if your client does
> not preallocate. Now use a client that preallocates the space and try
> again. Calling fallocate() first for the full file size will help on
> all these filesystems (well, TBH, I have not tested it on btrfs).
>
> If there are well-defined interfaces to give hints to the filesystem
> about the ultimate state of a file, it's a nice feature, not a bug.
>
> Sure, filesystems should do the best they can in the absence of hints,
> but performing well (or better) _with_ a hint is not indicative of a bug.
>
I can truely only speak for XFS, but btrfs might be similar:
Ha. Ha. Ha.
No. Sandeen can speak for XFS.
kthnx.