Re: GIMP 3.0.0-RC1

On Mon, 10 Feb 2025, rbowman wrote:

On Mon, 10 Feb 2025 12:08:00 +0100, D wrote:
>

It turned out that Azure had done something weird when emulating NIC:s
inside their VM:s, which broke the clustering of the SAP environment
when moved from on prem to the cloud.

>
Back before multicore processors I would have to remind people that no
matter how sophisticated the OS was you had one CPU executing one
instruction at a time. Then came VMs, with the stress on 'virtual'. When
you get down to bare metal if you have one NIC there's a whole lot of
juggling going on.
>
Back in the day we had a fairly sophisticated technique to mirror the live
system on a physically remote backup system. As bare metal systems were
replaced by VMs I had a hard time persuading our support people that their
time honored setup wasn't too useful when the live system and backup
system were VMs running on the same hardware. It's conceivable a VM could
crash and the switchover would work but if a rat chews through the power
cable they're all going down.
>
We also ran into problems with the specs on a HA system. Short story, if
you want to mirror you'd better have a big pipe.
>
Like most of life a high level abstraction is fine but you need to step
back every now and then and look at physical reality since there ain't no
other reality.
>

This is the truht! A fine lesson to keep in mind when designing systems.