Performance difference between UFS and ZFS with NFS

[Warren Block]

On Mon, 25 Nov 2013, Eric Browning wrote:

> I've tried to 4K align these SSDs with gnop but they are currently ashift
> 9.

Those are two different things.  Alignment is controlled by partition 
starting block and size.  Both should be integer multiples of 4K.

Using gnop to force ashift=12 just makes sure ZFS is using 4K blocks, it 
does not force alignment.