Re: [MooseFS-Users] ODP: Disappearing chunks on Ubuntu 14.04 chunk server(ZFS)

[Aleksander W. <ale...@mo...>]

Hi.
Is is possible to get some more infos from LOG file on this chunkserver?

First of all please check:
- if you have right entry in /etc/mfs/mfshdd.cfg for device mount point
- if you can list folders in mounted ZFS device which was a chunk disk
- if mouted device have right owner and group(default mfs:mfs)

Best regards
Aleksander Wieliczko
Technical Support Engineer
MooseFS.com <moosefs.com>

On 15.06.2015 11:58, Ben Harker wrote:
>
> Aleksander - thanks for the reply, sorry to get back late I was away
> for a couple of days -
>
>
> the chunkserver in question is running mfschunkserver 3.0.22-1 - as
> mentioned before, it's Ubuntu Server 14.04, ZFS, as a VM. there were a
> pair, the other one's fine.
>
>
> I'm quite happy to rebuild the box as a hardware unit, as that was the
> plan all along - my main question is that the chunks still exist on
> that drive, is there a semi-easy way for me to get them back into MFS,
> maybe on another chunkserver, and therefore back into use?
>
>
> when I start mfschunkserver I see
>
>
> *scanning folder /Storage/mfschunks/: .chunkdb used - full scan don't
> needed*
>
>
> - is there maybe a way to force a scan of the chunks that it seems to
> be ignoring?
>
>
> many many thanks in advance :)
>
>
> Benny.
>
>
> Ben Harker
>
> Apple / Linux Specialist
>
> Barton Peveril College
> Mob: 07525175882
> Tel: 02380367224
> Ext: 2731
>
>
> >>> Aleksander Wieliczko <ale...@mo...> 6/10/2015
> 9:30 PM >>>
>
> Hi.
> What is the version of your MooseFS instalation?
>
> Best regards
> Aleksander Wieliczko
> Technical Support Engineer
>
> ------------------------------------------------------------------------
> *Od: *Ben Harker <mailto:bj...@ba...>
> *Wysłano: *‎2015-‎06-‎10 22:15
> *Do: *moo...@li...
> <mailto:moo...@li...>
> *Temat: *[MooseFS-Users] Disappearing chunks on Ubuntu 14.04 chunk
> server(ZFS)
>
> Hello all, afraid I'm out of office so unable to post any logs but I
> did notice some oddness today; after a reboot, one of my chunkservers
> (one of a pair) was not listing any of it's chunks on moosefs-cgi,
> though the process was definitely running and the files were
> definitely on the drive (...luckily, this is backups of non-critical
> data!).
>
> Chunkservers are both running 1TB ZFS volumes on Ubuntu server VM's,
> all mfs utils are current as of today. Most of the data had a goal of
> 2 but some had a goal of 1, and that's the stuff I'm after.
>
> I've grep'd and tail'd through various logs but so far haven't come up
> with anything indicating an issue, can anyone think of any simple
> things I can check?
>
> ((If not, is there a way that I am able to get the chunks back into
> MFS somehow? I'm still learning the ropes here...))
>
> Many thanks in advance for any help.
>
> Ben.
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