Performance difference between UFS and ZFS with NFS

[Steven Hartland]

----- Original Message ----- 
From: "Warren Block" <wblock at wonkity.com>


> 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.

stable/10 and current/11 have dynamic ashift support.

It still requires either the disk report 4k sectors or a cam
quirk. So if you believe your disk is 4k but its not reporting
as such let us know.

    Regards
    Steve

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