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Date: Fri, 1 Dec 2006 11:49:55 +0100
From: Jeremie Le Hen <jeremie@le-hen.org>
To: freebsd-geom@FreeBSD.org
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Subject: gsnapshot around ?
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Hi,

we are getting more and more feature through Geom, coming near those
provided by Linux' LVM.  I'm thinking of gstripe, gvirstor, ...

However, it supports block-level snapshots which is not possible on
FreeBSD currently AFAIK.

I guess gjournal has some backends that might be used to create
gsnapshot.  It would be pretty useful in some case, especially
when FreeBSD will support Xen Dom0.  For instance, one can create
a bare FreeBSD install in a vnode-backed md(4) file, apply gsnapshot
on it to create N writable snapshots.  When a DomU instance will
write into it, a Copy-On-Write mechanism will be triggered to make
the changes elsewere.

For more information, type "lvm snapshot cow" on Google.

Is there any work in this area at the moment ?

Thank you !
Regards,
-- 
Jeremie Le Hen
< jeremie at le-hen dot org >< ttz at chchile dot org >