On Thursday 08 February 2007 10:08am, Jim Klein wrote:
> Anyone been able to get the PV drivers from Xensource to work on an
> FC6 created HVM. Performance is rather sluggish, even on 64bit,
> without these, yet they don't seem to want to work here. Or,
> alternatively, is Red Hat working on their own? The HVM IO is really
> a bit too slow for most production use without them.
On Thu, 8 Feb 2007 11:26am, Lamont Peterson wrote:
>I don't believe that you can do this.
>
>But, I'm wondering what OS you're trying to run on the HVM DomU. If it's
>Linux, use a paravirtualized DomU. You'll get much better performance
>(especially on things like I/O).
>
>HVM adds some emulation overhead and, thus, is slower than PV. HVM is only
>necessary to run an OS for which no paravirtualized kernel is available.
>--
>Lamont Peterson <lamont@xxxxxxxxxxxx>
>Senior Instructor
>Guru Labs, L.C. [ http://www.GuruLabs.com/ ]
All my Linux guests are PV (been running Xen in production for 7 months - far longer in testing.) I'm talking about Windows guests, which is why I would need PV drivers to work. Am running 64bit Dom0 to alleviate some of the pain, but I/O is still too slow for anything but lightweight applications. We're a RHEL shop, so would prefer to use RHEL as a base over XenSource Commercial, but it looks like I may have to go that route if noone else is working on PV drivers for Windows guests.
--
Jim Klein
Director Information Services & Technology
LPIC1, CNA/CNE 4-6, RHCT/RHCE
Saugus Union School District
http://www.saugus.k12.ca.us
"Finis Origine Pendet"
> Anyone been able to get the PV drivers from Xensource to work on an
> FC6 created HVM. Performance is rather sluggish, even on 64bit,
> without these, yet they don't seem to want to work here. Or,
> alternatively, is Red Hat working on their own? The HVM IO is really
> a bit too slow for most production use without them.
On Thu, 8 Feb 2007 11:26am, Lamont Peterson wrote:
>I don't believe that you can do this.
>
>But, I'm wondering what OS you're trying to run on the HVM DomU. If it's
>Linux, use a paravirtualized DomU. You'll get much better performance
>(especially on things like I/O).
>
>HVM adds some emulation overhead and, thus, is slower than PV. HVM is only
>necessary to run an OS for which no paravirtualized kernel is available.
>--
>Lamont Peterson <lamont@xxxxxxxxxxxx>
>Senior Instructor
>Guru Labs, L.C. [ http://www.GuruLabs.com/ ]
All my Linux guests are PV (been running Xen in production for 7 months - far longer in testing.) I'm talking about Windows guests, which is why I would need PV drivers to work. Am running 64bit Dom0 to alleviate some of the pain, but I/O is still too slow for anything but lightweight applications. We're a RHEL shop, so would prefer to use RHEL as a base over XenSource Commercial, but it looks like I may have to go that route if noone else is working on PV drivers for Windows guests.
--
Jim Klein
Director Information Services & Technology
LPIC1, CNA/CNE 4-6, RHCT/RHCE
Saugus Union School District
http://www.saugus.k12.ca.us
"Finis Origine Pendet"
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