I'm preparing ahead for when ZFS FreeBSD gains allocation classes with ZoF,
and have 2 technical questions.
1) Will migrating a pool's metadata to SSD vdevs require send+recv the pool
to a newly configured pool, or can it be done any way in situ? I'm fairly
sure its the former but worth checking.
2) What would be an accurate way to measure the total space currently
used/needed by all metadata (including DDT if relevant), for SSD vdev sizing?
(If possible based on actual zpool/zdb output stats, not assumed default
values, as my pool uses non-standard metaslab count per vdev + block sizing
to speed up spacemaps)
Thanks!
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