Thorsten Leemhuis wrote on 08.10.2014 07:52: > Josh Boyer wrote on 07.10.2014 21:15: >> On Tue, Oct 7, 2014 at 2:24 PM, Josef Bacik <josef@xxxxxxxxxxxxxx> wrote: >> […] >>>> I think the point is somewhat valid though. To just keep repeating the >>>> mantra 'its not ready' is not going to make it any more ready. If suse >>>> can identify a stable subset of btrfs features and use it as their >>>> default file system with those restrictions, why can't we do the same ? >>>> The approach makes sense to me, at least... >>> Because they still have the support staff for when users don't listen, >>> Fedora doesn't. >> As an aside, I looked at their 3.16.2-1.1.gdcee397 kernel-source SRPM. >> I can't find any patches that limit btrfs usage. I could totally be >> wrong, but if someone knows of a patch that limits the features please >> point me to it. > > Due to a coincidence I yesterday took a quick look myself and didn't > spot anything. But in case you haven't looked further: I found one in > the SLE-Kernels: > > http://kernel.opensuse.org/cgit/kernel-source/tree/patches.suse/btrfs-8888-add-allow_unsupported-module-parameter.patch?h=SLE11-SP3 > http://kernel.opensuse.org/cgit/kernel-source/tree/patches.suse/btrfs-8888-add-allow_unsupported-module-parameter.patch?h=SLE12 BTW & TWIMC, their solution to problems like this http://aseigo.blogspot.de/2014/09/btrfs-rebalancing.html (ran into this myself yesterday) seems to be a package called btrfsmaintenance that was introduced a few days ago. Quoting http://article.gmane.org/gmane.linux.suse.opensuse.devel/59787/ """ > From: David Sterba <dsterba <at> suse.cz> > Subject: Introduce btrfsmaintenance package to Factory > Newsgroups: gmane.linux.suse.opensuse.devel > Date: 2014-10-06 15:40:37 GMT (1 day, 14 hours and 40 minutes ago) > > Hi, > > let me introduce a new package that supplements the btrfs filesystem and aims > to automate a few maintenance tasks. This means the scrub, balance, trim or > defragmentation. The package comes from SLE12 where btrfs is going to be the > default filesystem as well. > > Each of the tasks can be turned on/off and configured independently. The > default config values were selected to fit the default installation profile. > > * scrub - go through all medatada/data and verify the checksums, default period > is one month > > * balance - the balance command can do a lot of things, in general moves data > around in big chunks, here we use it to reclaim back the space of the > underused chunks so it can be allocated again according to current needs > > The point is to prevent some corner cases where it's not possible to eg. > allocate new metadata chunks because the whole device space is reserved for all > the chunks, although the total space occupied is smaller and the allocation > should succeed. > > * trim - run TRIM on the filesystem using the 'fstrim' utility, makes sense for > SSD devices. > > * defrag - run defrag on configured directories. This is for convenience and > not necessary. > > There's a separate defragmentation task that happens automatically and > defragments only the RPM database files in /var/lib/rpm. This is done via a > zypper plugin and the defrag pass triggers at the end of the installation. > > This improves reading the RPM databases later, but the installation process > fragments the files very quickly so it's not likely to bring a significant > speedup here. > > Cron takes care of periodic execution of the scripts, but they can be run any > time directly from /usr/share/btrfs/maintenance/, respecting the configured > values in /etc/sysconfig/btrfsmaintenance. > > If the period is changed manually, the cron symlinks have to be refreshed, use > "systemctl restart btrfsmaintenance-refresh" (or the > "rcbtrfsmaintenance-refresh" shortcut). Changing the period via yast2 sysconfig > editor triggers the refresh automatically. > > The project lives in obs://filesystems/btrfsmaintenance and I'm going to submit > it to Factory. > > I'd like to ask volunteers to give it some testing. Feedback is welcome. > > Thanks, > David """ The package in the opensuse obs: https://build.opensuse.org/package/show/filesystems/btrfsmaintenance Seems to mostly consist of shell scripts. CU knurd -- devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/devel Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct
