Salve Herbert!
Herbert Poetzl schrieb am Dienstag, den 28. November 2006 um 16:03h:
> On Mon, Nov 27, 2006 at 04:24:10PM +0100, Robert Michel wrote:
> > Salve *, Herbert!
> >
> > I like the power of linux-vserver and I do not to
> > want to _nag_ you with the question:
In the sence of asking only for new features...
Linux-verserver is already powerfull, great and AFAIK very stable ;)
> > would "guest suspend to disk" work?
> ah, you mean a single guest
yes
> ... well that's a completely
> different thing, and yes, it is possible to do that,
already to do it today?
> but it requires some efford
sone efford for vserver modification or "just" administration?
> and increases the overall
> overhead significantly, as you cannot use sharing or
> isolation anymore ...
Overhead for the image or for the running system.
Some application will load some kernel modules or
libaries - when a guest is used for one application
only, the ram image on the disc would save with a
brute force methode all needed and cost disc memory.
But how to run the image again - by invoke it "brute
force" to 100% it may could run, but then would some
parts (driver, library) would run twice.
I think to suspend a guest a UserModeLinux would
be easyer to handle - but that would be not so smart,
not so efficent, especialy on embedded systems.
> > - could be remove from stock/RAM to free resources
> happens automagically via system paging (swap)
Is there a tool to manage it?
E.g. I start working with A, then work with B and C.
But C isn't so important for me - can I manualy swap
C to have more system recources for A or D?
Or when A is very important for my, can I avoid A
from being swaped?
By using different guests I would have a system to
manage recources for A, BC and D.
> > - could be moved to other (host) systems
>
> require the other systems to have identical structures
> and/or resources, that's why suspend to disk with
> different boxes does not work either ...
Saving a meta file for system/scructures and/or ressources
information and start QEMU with this meta file?
> > - could be cloned (for training or productive enviroments)
>
> in this case putting it into 'some' virtual machine
> is definitely the simpler approach ..
But wouldn't the virtual machine eat more system power?
> btw, you can achieve all that and more by adding
> a Xen wrapper around Linux-VServer ...
"Xen wrapper" I found a one year old news that sun whant's
to run redhed binaries compiled for x86 on solaris (x86)
http://www.techworld.com/opsys/features/index.cfm?featureid=1989&inkc=0
Interesting - this sounds less recources consumpting then
emulation or running a second operating system...
Would Xen-Wrapper would be smart and efficent when I just
want to use the *same* kernel? Are ther some other recources
(more detailed) about xen wrapper?
But my thought was that - a live linux like Knoppix could
attack the data on the flash memory - especialy when it
is not protected with encryption/hash functions.
So to avoid that an demonstration of another developer
will attack my system - but maybe also that i can try his
demonstration and switch back to my used version on the same
smartphone without a newstart and without losing to much
performances...
I like that I can sleep/swap this demonstration when I don't
need it - so that I run 1-2 of 10 different demonstrations
at the same time - and when I suspend one to disk, I could
continuing at the same point...
To suspend one guest and migrate it to a workstation and
migrate it back would be the next step - I think a workstation
has more power so emulation would be no problem for it.
Imagine some application would have infrequent bug - the tester
could suspend the guest to disk and share this image with other
developers to have a better chance to find out what has gone wrong
....
So even when suspend to disk solution would not be efficent to
save - because it would save everythink
and the wakeing up wouldn't efficent, because some driver/libaries
would run twice on the machine - what would you guess how much
work would it be?
Not to please the vserver developer to do this - maybe the OpenMoko
community becomes big enough that enough people would love to
use linux-vserver with a guest suspent to disk function that they
would hack it ;)
Would Xen-Wrapper would be smart and efficent when I just want
to use the same kernel?
Other ideas what to do now or maybe in the future with linux-vserver
on smartphones?
Running a vserver guest parallel on a mobil and a workstation at
the same time?
Other "sick" or smart ideas?
Cheers,
rob
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Received on Thu Nov 30 15:03:59 2006