-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
Diego Calleja wrote:
> El Sun, 22 Jan 2006 04:31:44 -0500,
> Theodore Ts'o <[email protected]> escribió:
>
>
>
>>One major downside with Soft Updates that you haven't mentioned in
>>your note, is that the amount of complexity it adds to the filesystem
>>is tremendous; the filesystem has to keep track of a very complex
>>state machinery, with knowledge of about the ordering constraints of
>>each change to the filesystem and how to "back out" parts of the
>>change when that becomes necessary.
>
>
>
> And FreeBSD is implementing journaling for UFS and getting rid of
> softupdates [1]. While this not proves that softupdates is "a bad idea",
> i think this proves why the added sofupdates complexity doesn't seem
> to pay off in the real world.
>
Yeah, the huge TB fsck thing became a problem. I wonder still if it'd
be useful for small vfat file systems (floppies, usb drives); nobody has
led me to believe it's definitely feasible to not corrupt meta-data in
this way.
I guess journaling is looking a lot better. :)
> [1]: http://lists.freebsd.org/pipermail/freebsd-hackers/2004-December/009261.html
>
> "4. Journaled filesystem. While we can debate the merits of speed and
> data integrety of journalling vs. softupdates, the simple fact remains
> that softupdates still requires a fsck run on recovery, and the
> multi-terabyte filesystems that are possible these days make fsck a very
> long and unpleasant experience, even with bg-fsck. There was work at
> some point at RPI to add journaling to UFS, but there hasn't been much
> status on that in a long time. There have also been proposals and
> works-in-progress to port JFS, ReiserFS, and XFS. Some of these efforts
> are still alive, but they need to be seen through to completion"
>
- --
All content of all messages exchanged herein are left in the
Public Domain, unless otherwise explicitly stated.
Creative brains are a valuable, limited resource. They shouldn't be
wasted on re-inventing the wheel when there are so many fascinating
new problems waiting out there.
-- Eric Steven Raymond
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.2 (GNU/Linux)
Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org
iD8DBQFD1CqhhDd4aOud5P8RAjvDAJ0W9pcNQ31v0RWSSIGVitnSpfvReQCdHBah
usgY72whnDcCwgshpVFW02o=
=Px/i
-----END PGP SIGNATURE-----
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
