Re: [Hampshire] Off-site backup (storage) services

--- On Thu, 16/10/08, Graham Bleach <graham@???> wrote:

> From: Graham Bleach <graham@???>
> Subject: Re: [Hampshire] Off-site backup (storage) services
> To: "Hampshire LUG Discussion List" <hampshire@???>
> Date: Thursday, 16 October, 2008, 10:39 PM
> 2008/10/16 Tony Whitmore <tony@???>:
> > Alternatively, in the on-line backup arena, we
> currently backup 3TB of data
> > in a full backup run. It is practical to use an
> on-line backup service for
> > this quantity of data or is the expense signficantly
> higher than the
> > storage services mentioned above?
>
> 3TB is going to take over 66 hours to transfer over a
> 100Mbit/s link
> (not allowing for upstream congestion, IP overheads and
> latency
> effects). It only seems feasible if you have reliable
> Gigabit link to
> the online backup service.
>

I should say if you intend to backup 3 Terrabytes of data over a network, its going to cost a hell of a lot. But what is the increment of a days data changes ? if its less than say 10GByte then off-site online backup solutions could work.

i have to administrate an online backup server tommorrow, and i think the average customer has about 30GBytes quota with a daily increment of 0.5 - 2.5 GByte. they pay about a grand a year or something like that for that space, but that includes a management fee.

one good thing though, its reasonably easy to pull random files out of the 'web interface' from the online backup repository, just incase a user deleted some special document, by accident today that was there yesterday.

isaac