continuous backup solution for FreeBSD
outbackdingo at gmail.com
Wed Oct 8 13:59:39 UTC 2008
one answer... www.bakbone.com
On Wed, Oct 8, 2008 at 6:20 PM, Oliver Fromme <olli at lurza.secnetix.de>wrote:
> Dag-Erling Smørgrav wrote:
> > "Zaphod Beeblebrox" <zbeeble at gmail.com> writes:
> > > "Dag-Erling Smørgrav" <des at des.no> writes:
> > > > What really annoys me with this thread is that nobody has provided
> > > > any information at all that would allow someone to understand what
> > > > needs to be done and estimate how hard it would be.
> > > Well... I hinted that a hammer port would be sufficient (although they
> > > need to finish their replication design) and I hinted that the hammer
> > > approach may be graftable to ZFS. Both reasonably large effort-wise
> > > (but probably within the scope of a single developer with sufficient
> > > time).
> > No... you're so far off the mark it's not even funny, especially when
> > it's been repeatedly pointed out to you. This is not a file system,
> > it's a backup system. It's not designed to survive a disk crash or an
> > accidental file deletion, it's designed to survive a direct missile
> > strike on your colo center.
> > To quote Wikipedia, "CDP is a service that captures changes to data to a
> > separate storage location" - emphasis on "separate".
> FWIW, the HAMMER file system _does_ support replication to
> remote targets (thus "separate"). Unfortunately they call
> this feature "mirroring", which is misleading at best.
> It's really rather a replication mechanism, much like the
> binlog of MySQL. It can be used for various purposes,
> including live mirroring, delayed mirroring, archiving,
> backup and point-in-time recovery.
> Well, of course, all of that doesn't help us at all because
> HAMMER doesn't exist on FreeBSD.
> However, ZFS does exist on FreeBSD, and I think it wouldn't
> be impossible to add similar features to ZFS.
> Another possibility would be to extend gjournal by adding
> time stamps to journal transactions and a possibility to
> feed the journal to a pipe, socket or whatever. And of
> course a client-side implementation that does something
> useful with the journal stream. This might even be a good
> SoC project.
> Best regards
> Oliver Fromme, secnetix GmbH & Co. KG, Marktplatz 29, 85567 Grafing b. M.
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