continuous backup solution for FreeBSD

[Outback Dingo]

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
>
> --
> Oliver Fromme, secnetix GmbH & Co. KG, Marktplatz 29, 85567 Grafing b. M.
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