Partial scrub support

[mabod]

I am wondering if it would be possible to get the zpool command to support partial scrubs by dataset. e.g.
zpool scrub mypool/mydata1/mydatset2

Every once in a while we see meta data issues like

#12025
#11294

They are only affecting one dataset and could easily be fixed. But instead a full scrub of the whole pool is need which can take days.

[AttilaFueloep]

Looks like #8995 should do the job.

[mabod]

Yes, that looks right.
But this PR is already in the pipeline for 2 years. Not very promising.

[AttilaFueloep]

Still your your best bet I'd say since a) it gained some traction recently and b) it perfectly matches your use case. I'd close this one and participate there.

[mabod]

Closing this. Waiting for the PR.

[jumbi77]

Beside the already mentioned PR there is also PR #7257 which is open for a long time. Looking forward for this PR too :)