Re: [MooseFS-Users] growing overgoal

[Markus K. <mar...@tu...>]

On Tuesday, 8 September 2020 09:04:50 CEST Agata Kruszona-Zawadzka wrote:
> W dniu 07.09.2020 o 15:17, Markus Köberl pisze:
> > On Monday, 7 September 2020 12:19:42 CEST Agata Kruszona-Zawadzka wrote:
> >>
> >> W dniu 04.09.2020 o 15:22, Markus Köberl pisze:
> >>> Since some time (last few versions of MooseFS) on a few chunkservers the used space grows above the default ACCEPTABLE_PERCENTAGE_DIFFERENCE = 1.0 till I restart the affected chunkserver.
> >>> On the webinterface i see huge numbers for overgoal (even 4 extra copies).  After the restart of the chunkserver the overgoal goes down but starts growing again after some time.
> >>
> >> We have an issue in MooseFS currently, where on disks with I/O errors in
> >> certain circustances some chunks get locked and cannot be deleted until
> >> the whole chunk server process is restarted. We introduced a fix for
> >> that, it's gonna be available in version 3.0.115. The issue does not
> >> affect disks without I/O errors.
> > 
> > Thanks good to hear that a fix might be on the way.
> > 
> > Could it be that instead of "some chunks get locked and cannot be deleted" that there a no deletes at all on this chunk server, or might that be a different problem?
> 
> Yes, that's exactly it. By "some chunks" I meant that not every chunk is 
> able to trigger the problem, but once it happens so that enough chunks 
> do, then, due to operation limits (specifically deletions limit in this 
> instance), the system won't attempt to delete any more chunks.

Thank you for confirming that it is the same problem and the good explanation.


regards
Markus Köberl
-- 
Markus Koeberl
Graz University of Technology
Signal Processing and Speech Communication Laboratory
E-mail: mar...@tu...