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Subject: Re: vfs.zfs.min_auto_ashift and OpenZFS
To: freebsd-current@freebsd.org
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From: Ryan Moeller <freqlabs@FreeBSD.org>
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Date: Wed, 9 Sep 2020 11:55:14 -0400
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On 9/8/20 4:31 PM, Niclas Zeising wrote:
> On 2020-05-02 02:20, Matthew Macy wrote:
>> OpenZFS doesn't have the same ashift optimization logic that FreeBSD
>> has. It's something that needs to be resolved before the code can be
>> integrated downstream.
>
> So currently all pools created with OpenZFS will use 512 bit 
> alignment, at least if the underlying storage device uses 512bit 
> sectors (which most drives tend to do)?
>
> If this is the case, it feels like a pessimisation.
>
> Regards


The vdev ashift optimizations from FreeBSD were put in OpenZFS before 
the import into base. That sysctl does work now.


-Ryan