vk> Actually customer wants to reduce the pool size, I guess we
vk> cannot do this today....there is a pending RFP on this.
RFE 4852783 is decreasing.
There was maybe some recent activity about INcreasing a pool size
which you can do already, but adding ability to notice the change in
LUN size without disconnecting the LUN and without exporting the pool.
I may have misunderstood though.
Anyway, currently you can increase only, not decrease, and it is
offline increasing---you must export and import the pool. It's
offline, but it's instantaneous and silent, meaning there's no
zfs_expand tool that runs for an hour or anything. so, for now,
adding devices can be done online, but increasing is offline and
decreasing/removing/raid-type-migration is impossible.