On Tue, 2006-03-28 at 19:15 +1000, Nick Piggin wrote:
> Kirill Korotaev wrote:
> > First of all, what it does which low level virtualization can't:
> > - it allows to run 100 containers on 1GB RAM
> > (it is called containers, VE - Virtual Environments,
> > VPS - Virtual Private Servers).
> > - it has no much overhead (<1-2%), which is unavoidable with hardware
> > virtualization. For example, Xen has >20% overhead on disk I/O.
> Are any future hardware solutions likely to improve these problems?
No, not all of them.
> > OS kernel virtualization
> > ~~~~~~~~~~~~~~~~~~~~~~~~
> Is this considered secure enough that multiple untrusted VEs are run
> on production systems?
Yes, hosting providers have been deploying this technology for years.
> What kind of users want this, who can't use alternatives like real
> VMs?
People who want low overhead and the administrative benefits of only
running a single kernel and not umpteen. For instance visibility from
the host into the guests' filesystems is a huge advantage, even if the
performance benefits can be magically overcome somehow.
> > Summary of previous discussions on LKML
> > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
> Have their been any discussions between the groups pushing this
> virtualization, and important kernel developers who are not part of
> a virtualization effort? Ie. is there any consensus about the
> future of these patches?
Plenty recently. Check for threads involving (the people on the CC list
to the head of this thread) this year.
Comparing Xen/VMI with Vserver/OpenVZ is comparing apples with orchards.
May I refer you to some slides for a talk I gave at Linux.conf.au about
Vserver: http://utsl.gen.nz/talks/vserver/slide17a.html
Sam.
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