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Date:      Wed, 12 Nov 2014 17:31:12 -0600
From:      "Gene" <fbsd@brightstar.bomgardner.net>
To:        Mike Tancsa <mike@sentex.net>, Gene <fbsd@bomgardner.net>, Freebsd Questions <FreeBSD-questions@freebsd.org>
Subject:   Re: FBSD 10, zfs, can't find mountpoint for /usr
Message-ID:  <20141112232934.M54977@brightstar.bomgardner.net>
In-Reply-To: <5463A22C.7030006@sentex.net>
References:  <20141112161610.M95499@brightstar.bomgardner.net> <54638E16.6070607@sentex.net> <20141112172332.M24598@brightstar.bomgardner.net> <5463A22C.7030006@sentex.net>

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On Wed, 12 Nov 2014 13:08:44 -0500, Mike Tancsa wrote
> On 11/12/2014 12:28 PM, Gene wrote:
> > OK - so on the older system, if I wanted to take a snapshot of, say /usr/
> > local/etc, I would have to snapshot /usr (/usr being the upstream
> > mountpoint).
> 
> Yes, you would typically do a UFS snapshot like that.
> 
> > So now, if I want a similar snapshot of /usr/local/etc, any idea
> > what the path would be? Can't do /usr, it's no longer a mountpoint.
> > Ditto /usr/local. Snapshoting "/" maybe? Would that no longer capture the
> > entire pool? Hmmmm....
> 
> Yes, it would indeed be /
> 
> ZFS snapshots are VERY efficient and fast. So dont worry about the 
> space they take. If just a few MB changed, the space it takes to 
> keep that snapshot wont be much bigger than the few MB. Here is one 
> of my servers with a default install and daily snapshots. As you can 
> see, / does not register as it doesnt get updated that often. /var 
> does, which makes sense due to the logs. But even there, it seems 
> quite efficient and economical.
> 
> # zfs list zroot
> NAME    USED  AVAIL  REFER  MOUNTPOINT
> zroot  7.24G  88.7G    96K  none
   %><  snip
> 	---Mike

And that solves the problem. 
Thank you for your help.
Gene

> 
> -- 
> -------------------
> Mike Tancsa, tel +1 519 651 3400
> Sentex Communications, mike@sentex.net
> Providing Internet services since 1994 www.sentex.net
> Cambridge, Ontario Canada   http://www.tancsa.com/


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