[lustre-discuss] Full OST

[Andreas Dilger]

You can also check "mdt.*.exports.*.open_files" on the MDTs for a list of FIDs open on each client, and use "lfs fid2path" to resolve them to a pathname.

On Sep 3, 2021, at 02:09, Degremont, Aurelien via lustre-discuss <lustre-discuss at lists.lustre.org<mailto:lustre-discuss at lists.lustre.org>> wrote:

Hi

It could be a bug, but most of the time, this is due to an open-unlinked file, typically a log file which is still in use and some processes keep writing to it until it fills the OSTs it is using.

Look for such files on your clients (use lsof).

Aurélien


Le 03/09/2021 09:50, « lustre-discuss au nom de Alastair Basden » <lustre-discuss-bounces at lists.lustre.org<mailto:lustre-discuss-bounces at lists.lustre.org> au nom de a.g.basden at durham.ac.uk<mailto:a.g.basden at durham.ac.uk>> a écrit :

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   Hi,

   We have a file system where each OST is a single SSD.

   One of those is reporting as 100% full (lfs df -h /snap8):
   snap8-OST004d_UUID          5.8T        2.0T        3.5T  37% /snap8[OST:77]
   snap8-OST004e_UUID          5.8T        5.5T        7.5G 100% /snap8[OST:78]
   snap8-OST004f_UUID          5.8T        2.0T        3.4T  38% /snap8[OST:79]

   However, I can't find any files on it:
   lfs find --ost snap8-OST004e /snap8/
   returns nothing.

   I guess that it has filled up, and that there is some bug or other that is
   now preventing proper behaviour - but I could be wrong.

   Does anyone have any suggestions?

   Essentially, I'd like to find some of the files and delete or migrate
   some, and thus return it to useful production.

   Cheers,
   Alastair.
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Cheers, Andreas
--
Andreas Dilger
Lustre Principal Architect
Whamcloud







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