Edward Pilatowicz wrote:
hey all,
so recently i wrote some zones code to manage zones on zfs datasets.
the code i wrote did things like rename snapshots and promote
filesystems. while doing this work, i found a few zfs behaviours that,
if changed, could greatly simplify my work.
the primary issue i hit was that when renaming a snapshot, any clones
derived from those snapshot are unmounted/remounted. promoting a
dataset (which results in snapshots being moved from one dataset to
another) doesn't result in any clones being unmounted/remounted. this
made me wonder if the mount cycle caused by renames is actually
necessary or is it just an artifact of the current implementation?
removing this unmount/remount would greatly simplify my dataset
management code. (the snapshot rename can also fail if any clones are
zoned or in use, so eliminating these mount operations would remove one
potential failure mode for zone administration operations.)
This is bug # 6472202. IMO, the prop changelist code could use an overhaul.
--matt
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