Re: ZFS guidance

[Georgi Naplatanov <gosho@oles.biz>]

On 1/2/21 11:10 PM, Gregory Seidman wrote:
> I've been running 10+ LVM volumes on top of dmcrypt on top of md RAID1 on
> Debian for many, many years and it has served me well. I've been
> double-mirroring (i.e. three active drives in the RAID array) for the last
> several with the idea that I can manually fail a disk, pull it out (and
> replace with a fresh drive), and put it somewhere safe off-site as an easy
> approach to backup (and I'm only concerned with disaster recovery, not
> individual file recovery).
> 
> I have new server hardware I'm planning on moving things to, and I'm
> considering making a change to my approach. I've been hearing good things
> about ZFS for a long time, and I understand that encryption has been
> supported for several years. Assuming that I have three physical disks to
> dedicate (separate from the three I am currently using) I'm seeking
> guidance on the following:
> 
> 1. Can an entire ZFS array be encrypted, rather than individual volumes? I
> 	 don't want to have to enter the password for each volume, just once when
> 	 bringing up the whole array.
> 
> 2. Is there a way to tune ZFS such that it can tolerate the loss of any two
>    out of three disks? Redundancy is more important to me than total
> 	 available storage.
> 
> 3. Is there any equivalent off-site backup mechanism like my current
>    fail-and-remove approach?
> 
> Note that I am not worried about the effort involved in moving data. This
> is a home setup and downtime is tolerable.
> 

Maybe this wiki can be helpful if you decide to use Debian GNU/Linux for
ZFS.

https://wiki.debian.org/ZFS

Kind regards
Georgi