auto-mounting ZFS snapshots
jhell at DataIX.net
Mon Dec 6 21:28:49 UTC 2010
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On 12/06/2010 16:13, Patrick Proniewski wrote:
> On 6 déc. 2010, at 18:20, Freddie Cash wrote:
>> FreeBSD automounts the "hidden" .zfs filesystem hierarchy where
>> snapshots are "stored" automatically. No need for amd.
> The zfs man page reads:
> File system snapshots can be accessed under the ".zfs/snapshot"
> direc- tory in the root of the file system. Snapshots are
> automatically mounted on demand and may be unmounted at regular
> intervals. The visi- bility of the ".zfs" directory can be controlled
> by the "snapdir" prop- erty.
> "may be unmounted at regular intervals" <-- what about this? Do I
> have to create a periodic script that'll unmount snapshots? And if
> so, how can I make a script that'll unmount only snapshots mounted
> for over, say, 1 hour?
No this is a no worry type of thing. This is a transparent process that
handles what is available. Just consider them mounted all the time but
you will not see them.
Play with it a little and see what it looks like. mount(1) will not even
show them as mounted so there is no worries here. The correct thing
happens to keep you from shooting yourself in the foot.
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