Things to do this week instead of arguing about mixers
Eric Sandeen
sandeen at redhat.com
Mon Apr 27 20:53:49 UTC 2009
Michael Cronenworth wrote:
> -------- Original Message --------
> Subject: Things to do this week instead of arguing about mixers
> From: Eric Sandeen <sandeen at redhat.com>
> To: Development discussions related to Fedora Core
> <fedora-devel-list at redhat.com>
> Date: 04/27/2009 02:10 PM
>
>> Now that we have ext4 as the new default filesystem, it'd be nice if we
>> can get more applications to take advantage of some of the features.
>>
>
> Filesystems should be transparent to programs 99% of the time in my
> humble little opinion. If ext4 depends on having falloc() calls then
> ext4 has a bug. File a bug on it.
>
> XFS, btrfs, or any file system that's better than the extX series don't
> seem to have issues with requiring this function call.
You're missing the point here, I think.
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.
-Eric
More information about the fedora-devel-list
mailing list