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Date:      Thu, 10 Jul 2008 21:23:08 +0200
From:      Kris Kennaway <kris@FreeBSD.org>
To:        "Daniel E. Lynn" <dan@audilis.com>
Cc:        freebsd-fs@freebsd.org
Subject:   Re: Storing UFS snapshots externally?
Message-ID:  <4876619C.4050108@FreeBSD.org>
In-Reply-To: <48765802.9060502@audilis.com>
References:  <48765802.9060502@audilis.com>

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Daniel E. Lynn wrote:
> Greetings all,
> 
> First, let me apologize if this has been asked before. If it has then my 
> search skills must be lacking because I couldn't seem to find it in the 
> lists anywhere.
> 
> I'm wondering if it is feasible to store snapshots for UFS on a separate 
> drive, and if so if there is an advisable way of doing it. The basic 
> idea is that I'd like to be able to mitigate any write overhead of using 
> a lot of snapshots by using a separate disk for them entirely. Here's 
> the proposed setup:

No, the point of snapshots is that they are copy-on-write, so you don't 
copy the data until it changes.  If you want to store them up 
externally, you have to copy the whole thing, and you should use a tool 
like dump, rsync, etc.

Kris




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