[nycbug-talk] off site backup

csnyder chsnyder
Fri Oct 28 15:29:28 EDT 2005

On 10/28/05, George Georgalis <george at galis.org> wrote:
> What are people doing for off site backup? I know there is a lot
> of options, my only requirement is to mitigate risk, which is
> kinda vague. There is about 60Gb which may double in a year.  It
> would be desirable to have on line access to the older data.
> Typically I do frequent rsync with hardlinks into dated folders on
> HD, so local snapshots are available at the site.
> This data is highly private, so that must be part of the formula.
> I was thinking of a system similar to the local backups, doing a
> pull from a colo machine; and at the same time making cd/dvd or
> tapes at the main site which would go into a (bank) safe deposit
> box or some other facility.
> My tendency is to think an off site raid mirror functioning as a
> copy of the local raid mirror snapshots is pretty comprehensive.
> It is difficult for me to focus on the benefits of dated tape, hd,
> or cd/dvd in a storage facility. What is the real benefit of that?
> Very quick disaster recovery is not necessary, but 3 days would
> defiantly be better than a week to recover.  How do I find the
> sweet spot of medium, interval and rotation? Is off line medium
> really necessary here?
> // George

Disk-based backup seems preferable to tape, both for ease of recovery
(speed) and the fact that you don't need to keep a matching tape drive
with the backup tapes.

On the downside, if you want to archive your backups for 7+ years, you
have to keep buying new disk drives.

Chris Snyder

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