Greetings Noble BSD Gods

[Mark Felder]

On Mon, Feb 10, 2014, at 13:30, Dan Uber wrote:
> I am but a simple mortal respectfully inquiring about the future
> potential
> of the ZFS spacemap_histogram feature offering write support.
> 
> I have a 30TB array that was spawned in FreeNAS (foolish mistake, yes, I
> know) that I would really love to migrate to FreeBSD 10, but I'm getting
> the following when I try to import it.
> 
> root at Galaxy:/home/ub3r # zpool import Galaxy
> This pool uses the following feature(s) not supported by this system:
>         com.delphix:spacemap_histogram (Spacemaps maintain space
> histograms.)
> All unsupported features are only required for writing to the pool.
> The pool can be imported using '-o readonly=on'.
> cannot import 'Galaxy': unsupported version or feature
> 
> At first I thought this might be something easy to implement myself, then
> I
> was informed that only the FreeBSD-FS Overlords are capable of dabbling
> in
> such witchcraft.
> 
> Thank you for your time, I greatly appreciate it.
> 

Did FreeNAS patch in spacemap_histogram before we did? I'm aware it
exists in head/CURRENT, but didn't notice until now that it's missing
from FreeBSD 10.