[Discuss] ZFS on Raspberry Pi?

[richard.pieri at gmail.com (Rich Pieri)]

On Fri, 29 Jul 2022 11:29:24 -0400
markw at mohawksoft.com wrote:

> You can't make a general argument about a specific example. I have an
> 8 core AMD FX with 16G ram. It isn't running ZFS, but it is running
> an MD RAID5 with 5 4T SCI disks.

I didn't. I made an example of something that could reasonably be found
lying around. If you have something larger then you can scale more
easily. YMMV.


> The problem of redundancy is kind of a non-sequiteur for a discussion
> of VMs. Anything you can do with hardware you can do with a VM, I
> don't understand why you think it introduces any new difficulty to
> the problem. The VM makes a server just another application.

This is factually incorrect. Two examples:

A service running in a VM is vulnerable to SPECTRE-style hardware
attacks launched from other VMs on the same host. A service running on
a discrete machine cannot be attacked this way.

An application running in a VM does not have full direct access to
attached peripherals such as temperature sensors and X10 controllers
(it has to go through the hypervisor). The same application running on
discrete hardware does (at least can) have this access.

I'm not assuming any "additional" difficulty. I am pushing back at your
assertion that virtualization is the perfect solution to every problem.
It isn't.

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