Fedora xen - Jan 2008 - kernel-xen, qemu, kvm etc summary and speed of virtual machines in F8

People,

Is there available a plain summary of how all the different bits of
virtualisation fit together?  The stuff I have found so far is more
confusing than anything . .

I have been toying around with virtual machines on FC6, F7 and now F8
but there seems to have been a big slow-down in performance with F8?

This speed issue is why I have been trying to get a better understanding
of how all the bits fit together, see where the bottlenecks are and what
I can do to improve performance so that I might use the virtual machines
for real work.  

I have installed:

kernel-xen-2.6.21-2952.fc8
xen-libs-3.1.2-1.fc8
xen-3.1.2-1.fc8
qemu-0.9.0-5.fc8
kvm-36-7.fc8

Thanks,

Phil.
-- 
Philip Rhoades

Pricom Pty Limited  (ACN 003 252 275  ABN 91 003 252 275)
GPO Box 3411
Sydney NSW      2001
Australia
Fax:     +61:(0)2-8221-9599
E-mail:  phil@pricom.com.au

I''m interested in this too as the F8 vm I''m running on an F8
host
seems pretty slow. Also right now I''m using qemu does xen perform
better? Is there any place I can read about the tradeoff between
approaches?

On Jan 21, 2008 11:12 PM, Phil Rhoades <phil@pricom.com.au>
wrote:
> People,
>
> Is there available a plain summary of how all the different bits of
> virtualisation fit together?  The stuff I have found so far is more
> confusing than anything . .
>
> I have been toying around with virtual machines on FC6, F7 and now F8
> but there seems to have been a big slow-down in performance with F8?
>
> This speed issue is why I have been trying to get a better understanding
> of how all the bits fit together, see where the bottlenecks are and what
> I can do to improve performance so that I might use the virtual machines
> for real work.
>
> I have installed:
>
> kernel-xen-2.6.21-2952.fc8
> xen-libs-3.1.2-1.fc8
> xen-3.1.2-1.fc8
> qemu-0.9.0-5.fc8
> kvm-36-7.fc8
>
> Thanks,
>
> Phil.
> --
> Philip Rhoades
>
> Pricom Pty Limited  (ACN 003 252 275  ABN 91 003 252 275)
> GPO Box 3411
> Sydney NSW      2001
> Australia
> Fax:     +61:(0)2-8221-9599
> E-mail:  phil@pricom.com.au
>
> --
> Fedora-xen mailing list
> Fedora-xen@redhat.com
> https://www.redhat.com/mailman/listinfo/fedora-xen
>

Phil Rhoades wrote:
> People,
> 
> Is there available a plain summary of how all the different bits of
> virtualisation fit together?  The stuff I have found so far is more
> confusing than anything . .
> 
> I have been toying around with virtual machines on FC6, F7 and now F8
> but there seems to have been a big slow-down in performance with F8?
> 
> This speed issue is why I have been trying to get a better understanding
> of how all the bits fit together, see where the bottlenecks are and what
> I can do to improve performance so that I might use the virtual machines
> for real work.  

I''ll throw my "me too" in. I am sure my first guest, Debian
an an F8
beta, could do disk at 148 Mbytes/sec, as measured with hdparm.

This made some kind of sense, I thought, as it would be hitting RAM on 
the host.

No more, disk is about Pentium class or worse.

I''ve been using hardware virtualisation all the time, and that first 
guest was with Xen.


-- 

Cheers
John

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