On Thu, 2009-08-20 at 01:03 +0200, Henrik Johansson wrote:
> Hello Michael,
> On Aug 19, 2009, at 7:17 PM, Michael Barrett wrote:
> > Say you create a zpool based on a file that lives on a NFS mount.
> >  Then you mount that zpool to a local mount point and give it to
> > your zone to live on.  I'm assuming that under the covers this is
> > just another version of this loopback method:
> > 
> > http://blogs.sun.com/jph/entry/containers_on_nfs
> > 
> > Is there anyone out there running like this?  Any performance issues
> > that jumped out at you?
> Since using files as backing store for a pool is not recommended,
> putting them on NFS will probably not make things better. It will only
> be as reliable as the remote filesystem and NFS implementation
> together. People have lost their pools in far less complex
> configurations, talk to the ZFS people but i doubt they will approve.
> I would feel more safe with UFS if I where to put a filesystem on
> files or perhaps
> iSCSI: http://blogs.sun.com/JeffV/entry/zoit_solaris_zones_on_iscsi

I would discourage you from using UFS formatted volumes as backing store
for you containers, especially over iSCSI which is not COMSTAR. We've
run into really major reliability issues. There are even certain ways to
panic the kernel.


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