[ZFS] refquota is very slow !

[InterNetX - Juergen Gotteswinter]

Did you try the same in a single local disk based pool? And pls post output of
zfs get all, zdb & zpool get all


> Ben RUBSON <ben.rubson at gmail.com> hat am 4. September 2016 um 11:28
> geschrieben:
>
>
> Juergen & Bram,
>
> Thank you for your feedback.
>
> I then investigated further and think I found the root cause.
>
> No issue with refquota in my zroot pool containing (in this example) 300.000
> inodes used.
>
> However, refquota is terribly slow in my data pool containing around
> 12.000.000 inodes used.
>
> I then created 12.000.000 empty file in my zroot pool, in a test dataset.
> I put a refquota on this dataset and created a dd file to fulfil empty space.
> And around the limit, it began to stall...
> I then created an empty dataset in the same pool, refquota is even slow in
> this dataset having no inode used.
> The root cause seems then to be the total number of inodes used in the pool...
>
> Some numbers :
> Time to fulfil 512MB with quota : 17s
> Time to fulfil 512MB with refquota : 3m35s
>
> Very strange.
>
> Do you experience the same thing ?
>
> Thank you again,
>
> Ben
>
> > On 03 Sep 2016, at 16:59, Bram Vandoren <bram.vandoren at kuleuven.be> wrote:
> >
> > I encountered the same problem over NFS. I didn't manage to reproduce it not
> > using NFS. I think the userquota property works without any problem though.
> >
> > Cheers,
> > Bram.
>
> > On 03 Sep 2016, at 12:26, InterNetX - Juergen Gotteswinter
> > <juergen.gotteswinter at internetx.com> wrote:
> >
> > cant confirm this, works like a charm without difference to normal quota
> > setting
>
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