[Lustre-discuss] Lost Files - How to remove from MDT
bs_lists at aakef.fastmail.fm
Sun Apr 18 08:46:54 PDT 2010
On Sunday 18 April 2010, Charles Taylor wrote:
> On Apr 18, 2010, at 9:38 AM, Brian J. Murrell wrote:
> > On Sun, 2010-04-18 at 09:30 -0400, Charles Taylor wrote:
> >> Is there some way to remove these files from the MDT - as though they
> >> never existed - without reformatting the entire file system?
> > lfsck is the documented, supported method.
> Yes, but we attempted that at one time with a smaller file system (for a
> different reason). After letting it run for over a day, we estimated
> that it would have taken seven to ten days to finish. That just wasn't
> practical for us at the time and still isn't. This file system would
> probably take a couple of weeks to lfsck. I'm sorry to say we can't take
> the file system offline for that long.
You don't need to take the filesystem offline for lfsck. Also, I have
rewritten large parts of lfsck and also fixed the parallelization code. I need
to review all patches again and probably also make a hg or git repository out
of it. Unfortunately, I always have more tasks to do than I manage to do...
But given the fact that I fixed several bugs and added safety checks, I think
my version actually is better than upstream.
Let me know if you are interested and I can put a tar ball of
e2fsprogs-sun-ddn on my home page.
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