On Thu, 2022-11-10 at 02:19 -0500, gene heskett wrote:
> On 11/10/22 00:37, David Christensen wrote:
> > On 11/9/22 00:24, hw wrote:
> >  > On Tue, 2022-11-08 at 17:30 -0800, David Christensen wrote:
> 
> [...]
> Which brings up another suggestion in two parts:
> 
> 1: use amanda, with tar and compression to reduce the size of the 
> backups.  And use a backup cycle of a week or 2 because amanda will if 
> advancing a level, only backup that which has been changed since the 
> last backup. On a quiet system, a level 3 backup for a 50gb network of 
> several machines can be under 100 megs. More on a busy system of course.
> Amanda keeps track of all that automatically.

Amanda is nice, yet quite unwieldy (try to get a file out of the backups ...). 
I used it long time ago (with tapes) and I'd have to remember or re-learn how to
use amanda to back up particular directories and such ...

I think I might be better off learning more about snapshots.

> 2: As disks fail, replace them with SSD's which use much less power than 
> spinning rust. And they are typically 5x faster than commodity spinning 
> rust.

Is this a joke?

https://www.dell.com/en-us/shop/visiontek-16tb-class-qlc-7mm-25-ssd/apd/ab329068/storage-drives-media

Cool, 30% discount on black friday saves you $2280 for every pair of disks, and
it even starts right now.  (Do they really mean that? What if I had a datacenter
and ordered 512 or so of them?  I'd save almost $1.2 million, what a great
deal!)

And mind you, SSDs are *designed to fail* the sooner the more data you write to
them.  They have their uses, maybe even for storage if you're so desperate, but
not for backup storage.

> Here, and historically with spinning rust, backing up 5 machines, at 3am 
> every morning is around 10gb total and under 45 minutes. This includes 
> the level 0's it does by self adjusting the schedule to spread the level 
> 0's, AKA the fulls, out over the backup cycle so the amount of storage 
> used for any one backup run is fairly consistent.

That's almost half a month for 4TB.  Why does it take so long?

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