GJournal (hopefully) final patches.
bryants at gmail.com
Thu Aug 10 21:18:50 UTC 2006
On 8/8/06, Pawel Jakub Dawidek <pjd at freebsd.org> wrote:
> I'm pleased to announce hopefully the final gjournal patches.
> The biggest change is removal of magic .deleted/ directory. Now orphaned
> objects (files/directories which were deleted, but are still open) are
> handled in a different way - in every CG there is a counter which tells
> how many such orphaned objects are there in the given CG. There is also
> a global unreferenced inodes counter in the superblock.
> On power failure or system crash, fast fsck version will be run on
> journaled file system which only checks CG for unreferenced inodes.
> Multi terabyte file system is checked in few minutes, but it depends on
> how many such objects we have. The global counter in the superblock
> allows to stop scanning CGs when it goes to 0.
> Another change is that now from a configuration point of view gjournal
> is threated simlar to soft-updates - you need to specify -J flag at
> newfs(8) time or use 'tunefs -J enable <fsdev>'. 'gjournal' is no longer
> a mount option.
> To create journaled UFS file system on ad0s1d partition:
> # gjournal load
> # gjournal label ad0s1d
> # newfs -J /dev/ad0s1d.journal
> # mount -o noatime,async /dev/ad0s1d.journal /mnt
> On reboot 'fsck_ffs -p /dev/ad0s1d.journal' will perform fast check. One
> can still run regular check by not giving the -p option.
> BTW. This should allow to have root file system on gjournal partition,
> but haven't verified it yet - just a theory.
> Patches for 7-CURRENT:
> Patches for 6-STABLE:
> To apply the patches:
> # cd /usr/src
> # mkdir sys/geom/journal sbin/geom/class/journal sys/modules/geom/geom_journal
> # patch < gjournal_20060808.patch
> Now you need to recompile the world and the kernel. Remember to add
> 'options UFS_GJOURNAL' to your kernel configuration file.
> If there will be no bug reports nor strong objections, I'd like commit
> gjournal in a week or two first to 7-CURRENT and then to 6-STABLE (maybe
> before 6.2-RELEASE, but it depends on testing and feedback from users).
> Pawel Jakub Dawidek http://www.wheel.pl
> pjd at FreeBSD.org http://www.FreeBSD.org
> FreeBSD committer Am I Evil? Yes, I Am!
Okay I have applied the latest patches. And everything works fine on a
new filesystem (newfsing).
Trying to add it to an existing file system I'm getting problems. This
might be my fault. So I'll give it another go before reporting back my
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