The MDT shows 6% of storage in use and 9% of inodes in use.  The OST,
however, shows 46% of storage and 100% of inodes in use (12 free).  (There
is only one OST on this particular file system.)   I suppose if a lot of
files are deleted, the system will recover, but then I'm not sure why I
couldn't create any files after deleting a few.

Is there any way to increase the number of inodes on the OST without losing
the data currently on the filesystem?

.. Lana ([email protected])




On Thu, Mar 19, 2020 at 2:13 PM Degremont, Aurelien <[email protected]>
wrote:

> Hi Lana,
>
>
>
> Lustre dispatches the data across several servers, MDTs and OSTs. It is
> likely that one of this OST is full.
>
> To see the usage per sub-component, you should check:
>
>
>
> lfs df -h
>
> lfs df -ih
>
>
>
> See if this reports one OSTs or MDT is full.
>
>
>
> Aurélien
>
>
>
> *De : *lustre-discuss <[email protected]> au nom de
> Lana Deere <[email protected]>
> *Date : *jeudi 19 mars 2020 à 19:08
> *À : *"[email protected]" <[email protected]>
> *Objet : *[EXTERNAL] [lustre-discuss] "no space on device"
>
>
>
> *CAUTION*: This email originated from outside of the organization. Do not
> click links or open attachments unless you can confirm the sender and know
> the content is safe.
>
>
>
> I have a Lustre 2.12 setup running on CentOS 7.  It has been working fine
> for some months but last night one of my users tried to untar a large file,
> which (among other things) created a single directory containing several
> million subdirectories.  At that point the untar failed, reporting "no
> space on device".  All attempts to create a file on this Lustre system now
> produce the same error message, but "df" and "df -i" indicate there is
> plenty of space and inodes left.  I checked the mount point on the metadata
> node and it appears to have plenty of space left too.
>
>
>
> I can list directories and view files on this filesystem.  I can delete
> files or directories on it.  But even after removing a few files and a
> directory I cannot create a new file.
>
>
>
> If anyone can offer some help here it would be appreciated.
>
>
> .. Lana ([email protected])
>
>
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