Re: [linux-lvm] RE:LVM Snapshots for remote archiving.

[Chris Beck <cbeck gene concordia ca>]

Yah, that works, but I can't really archive the whole thing to tape on a 
regular basis - I've got scads of large image files and other sundries 
that will very quickly go above the capacity of convenient taping.

I guess I'm not being clear ... I don't want the snapshot volume, I want 
the set of writes that are stored somewhere while the snapshot is in 
existance.

It is whispered that C R Ritson was heard, on or about 1/28/2004 4:30 AM 
to say:

> > I want to use 24-hour snap shots as an archival tool.
> > I have 2 identical file servers, one primary and one as an off-site=20
> > mirror.  I'd like the primary system to generate a transaction 
> > log that=20
> > rolls over every 24-hours and gets transmitted to the remote site.
> >    
>
> I do something similar but with tapes, not a second server. Every
> evening, about 15 minutes before the backups, I delete an old snapshot
> and create a new one. As this snapshot is mounted and exported via NFS I
> have to undo this first (which has caused slight problems,
> occasionally). I then backup the newly created snapshot to tape using
> amanda. Using the snapshot ensures that amanda and dump (even though
> working at the block level) is guaranteed not to see a changing
> filesystem, and the snapshot remains available for most of the next 24
> hours for a user-initiated recovery of yesterday's version of a file.
> Any longer than that, and we have to go to the tapes, but amanda's
> indexing makes it quite easy to step back in time and see the filenames
> that were previously on disk (though not change dates). Such as it is, I
> can make the snapshot script available.
>
> Chris Ritson (Computing Officer)
>  

--
Chris Beck / Y.A.B.A. / Fungal Genomics
CFSG / Concordia University
"La loi dans sa majestueuse égalité, interdit à tous, aux riches comme
aux pauvres de dormir sous les ponts, de coucher dans la rue et de voler
du pain." -- Anatole France (Les Lys Rouge - 1894)