Re: Need to get out of SCO, linux-abi
- From: Bela Lubkin <filbo@xxxxxxxxxx>
- Date: Wed, 10 Oct 2007 13:06:09 -0700
"RLR" wrote:
Bill Campbell wrote:
Have you considered running OSR5 under VMWare? I've seen several posts
from Bela talking about running various SCO systems with it.
On Oct 9, 1:13 pm, Bela Lubkin <fi...@xxxxxxxxxx> wrote:
VMware's virtual hardware provides a stable platform on which OSR5 can
be expected to run smoothly for years past the end of availability of
OSR5-compatible physical hardware.
Great idea Bill and Bela. But doesn't vmware slow down an application?
I only tried it running Windows Vista on a linux system. Everything
worked but it was slow. Of course I need SCO for foxpro database
crunching by about 20 simultaneous users, it isn't graphics of Vista.
Speed of database is important. Thanks for the idea. I am going to try
linux-abi on a few more kernels and distros. So far I failed at CentOS
5 (RedHat ES5) and a couple of others. Maybe I'll get lucky and a few
others are trying too.
In my search for a solution, Googling for an answer, I bumped into
numerous orphan users in the same boat. There needs to be a gathering.
The guys who have the technical abilities seem to succeed with
numerous kernels.
The virtual environment presented by VMware on today's hardware is
faster than the native environment that the legacy SCO sysems ran on.
Just make sure there's adequate memory.
The only drawback I've encountered running on VMware is that it's easy
to corrupt the virtual disk with an improper shutdown. VMware
provides tools that let the host OS do that safely for supported guest
OS's. Is there some workaround for that?
You can certainly arrange for your virtual OSR5 to be shut down on
demand. That is, if you _know_ you are shutting down the virtualization
environment, you can take steps at the same time to shut down the VMs
even if they are not going to be able to respond to internal signals
from the virtualization environment.
What's that mean?
At the crudest level, it means: before you shutdown VMware, login to the
OSR5 VM as root and shut it down manually.
What refinements can you make on that?
Well, you can shutdown the OSR5 box remotely by doing:
ssh root@osr5vm shutdown -g0 -y # or whatever
So now you have something that you can script. Set things up so your
controlling host (host you're ssh'ing from) can ssh in to the VM's root
without needing to enter a password.
Now if you're shutting down the VMware environment under some sort of
script control, you can just do the OSR5 VM shutdown before the
environment shutdown, in the same script.
If VMware is being shutdown as part of a host OS shutdown, all host OS
shutdown facilities have ways to add scripted steps to the shutdown.
Research that, add a "shutdown my OSR5 VMs" step before it's going to
get to the VMware environment in which they run.
....
So yes, there are workarounds; you'll have to participate in researching
the exact details.
....
Meanwhile, to address an implied question: I think it would be possible
for an OSR5 guest OS to become receptive to the mechanisms VMware uses
to tell guest OSes to shutdown. I've done some experimentation with
running a Linux version of `vmware-guestd` under `lxrun`, for instance.
I don't have my research notes right now and this was nothing in any
shape to be used for serious purposes. What I want to convey is that
it's within the realm of technical possibility, if someone spends the
time/energy on working out the details.
Bela<.
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