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RE: btrfs filesystem full problems (was Re: A full /var partition destroyed 3 hours of my life!)

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  RE: btrfs filesystem full problems (was Re: A full /var partition  destroyed 3 hours of my life!) Borden Rhodes <jrvp@bordenrhodes.com> - 2016-11-15 20:50 +0100
    Re: btrfs filesystem full problems (was Re: A full /var partition  destroyed 3 hours of my life!) Jonathan Dowland <jmtd@debian.org> - 2016-11-16 11:40 +0100

#174771 — RE: btrfs filesystem full problems (was Re: A full /var partition destroyed 3 hours of my life!)

> It sounds like btrfs specific behaviour. It would be interesting to know
> what kernel version and btrfs version you were using, if only to confirm
> my suspicion that even the versions in Debian are not suitable for use in
> production.
>
> I'm going to guess that it was a series of 'btrfs balance' commands that
> fixed things for you.

Correct you are! The various incantations used different filters and
one of them worked. I have no idea what filters are and I would die a
happy man without needing to know.

I use Debian testing, so it's whatever kernel and btrfs packages that
were in that as of yesterday.

> Yes, this is right. The problem is not 'rm', the problem is that you use
> sudo without understanding why it is set up like that: sudo logs the
> command it executes to /var/log/auth.log

Makes sense. So why did I get the exact same problem when I enabled
the debug-shell? Unless it's also lying to me, doesn't it boot into a
proper root shell?

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#174788

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On Tue, Nov 15, 2016 at 02:25:55PM -0500, Borden Rhodes wrote:
> Correct you are! The various incantations used different filters and
> one of them worked. I have no idea what filters are and I would die a
> happy man without needing to know.

Last time I used 'btrfs balance', I had to run it with increasing (or
decreasing) values for the -fi argument (iirc), as the initial values freed up
just enough working space for the subsequent values to work within, and the
subsequent values would not work when I first tried them. If that makes sense.
I was left with a very sour taste in my mouth.

Nowadays I only use btrfs for a development space (as a docker storage backend)
and when it goes pear-shaped, I just blow it away and start again, there's
nothing stored there which can't be recreated.

> I use Debian testing, so it's whatever kernel and btrfs packages that
> were in that as of yesterday.

Ah ok, thanks.

-- 
Jonathan Dowland
Please do not CC me, I am subscribed to the list.

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