Re: New file system with same issue (was: Again, no space left on device while rebalancing and recipe doesnt work)

[Marc Haber <mh+linux-btrfs@zugschlus.de>]

On Sun, Mar 13, 2016 at 08:14:45PM +0100, Henk Slager wrote:
> On Sun, Mar 13, 2016 at 12:58 PM, Marc Haber
> <mh+linux-btrfs@zugschlus.de> wrote:
> > Hi,
> >
> > On Sat, Mar 05, 2016 at 12:34:09PM -0700, Chris Murphy wrote:
> >> The alternative if this can't be fixed, is to recreate the filesystem
> >> because there's no practical way yet to migrate so many snapshots to a
> >> new file system.
> >
> > I recreated the file system on March 7, with 200 GiB in size, using
> > btrfs-tools 4.4. The snapshot-taking process has been running since
> > then, but I also regularly cleaned up. The number of snapshots on the
> > new filesystem has never exceeded 1000, with the current count being
> > at 148.
> 
> Is the snapshotting still read-write?

Yes, I want to keep the possibility to remove huge files from
snapshots that shouldnt have been on a snapshotted volume in the first
place without having to ditch the entire snapshot.

> Also, If some part of the OS or tools scans through the snapshot dirs
> every now and then with atime creation on, metadata grows without a
> real need.

I mount with noatime and nodiratime anyway, and the directory the
snapshots are mounted to (/mnt/snapshots) are excluded in
updatedb.conf. Any other idea which tool might scan filesystems and
that might not be noticed when it's running about a five digit number
of snapshots?

Greetings
Marc

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