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Date:      Fri, 04 Jan 2008 14:02:59 -0500
From:      Graham Todd <gtodd@bellanet.org>
To:        Matthew Dillon <dillon@apollo.backplane.com>
Cc:        Mikhail Teterin <mi@bonkers.video-collage.com>, efinleywork@efinley.com, current@freebsd.org
Subject:   Re: a new way to hang 7.0
Message-ID:  <477E82E3.6000303@bellanet.org>
In-Reply-To: <200801032334.m03NY7Zd019292@apollo.backplane.com>
References:  <200801012116.m01LGQhN012860@bonkers.video-collage.com> <200801032334.m03NY7Zd019292@apollo.backplane.com>

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Matthew Dillon wrote:
>     DragonFly has a new filesystem called HAMMER in the works which should
>     become production ready in a few months.  All primary operations work now
>     so it is very real, but major pieces still need to be written and others
>     need to be rewritten and stabilized.  It's in pre-alpha state now and
>     will be early-alpha by the DFly 2.0 release later this month.  It should
>     be in a state that can be ported without having to play constant catchup
>     in maybe 2-3 months.  This filesystem has full historical capabilities...
>     you don't even have to make snapshots per say, just sync, and you can get
>     at any data as-of any point in the past with a simple @@<timestamp>
>     file/directory name extension.

Wow, pretty neat. If HAMMER becomes the default filesystem and snapshots
are low cost and easy are they any plans to leverage these features? :-)
 If I understand some of the opensolaris work correctly they are
starting to make use of zfs snapshots for upgrades/updates and packaging
systems.



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