NFS server hang with backing store on ZFS and quota nearly exhausted

[Ben RUBSON]

> On 21 Dec 2016, at 07:24, Garrett Wollman <wollman at bimajority.org> wrote:
> 
> I don't know the ZFS code well enough to understand what running out
> of quota has to do with this situation (you'd think it would just
> return immediately with [EDQUOT]) but perhaps it matters that the
> clients are not well-behaved and that the filesystem is often almost
> at quota but not quite there yet.

Hi Garrett,

ZFS is slow when your are playing around the quota limit,
due to how quota are implemented.
See this thread :
https://lists.freebsd.org/pipermail/freebsd-fs/2016-September/023874.html

Ben