On Fri, Feb 27, 2015 at 3:52 PM, Jerry Jelinek <[email protected]>
wrote:

>
> NFS mounting from the GZ into a zone on the same box is kind of tricky
> because the the two things (GZ and NGZ) want to act like separate machines
> but they are clearly not. There is a very old bug (decades?) in the way UFS
> and NFS interact which can cause a deadlock in rare cases. The automounter
> always worked around this by doing a lofs mount when it sees you are NFS
> mounting on the same machine as the NFS server. However, the automounter
> obviously can't detect that when it is running inside of a NGZ. I have
> never heard of or seen a definitive evaluation to determine if this UFS/NFS
> deadlock is applicable to ZFS, so some of the conventional wisdom here
> might be outdated.
>

I've not had any problems either in a light use deployment.  However, I
just put a VM into production on a high traffic Samba deployment and
performance is horrible.  I could do better by hooking a USB stick to the
workstation.    I'm going to move the data for this VM over to the primary
filesystem in the VM over the weekend, but I'd like to know why this isn't
working very well.  NFS is perfect for mounting volumes inside a VM, unless
it just doesn't work.

Greg



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