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Re: [Libvir] [PATCH 0/6] Inactive domain support



On Wed, Nov 15, 2006 at 02:11:59AM +0000, Daniel P. Berrange wrote:
> The following series of patches is an update of my previous patches for
> supporting inactive domains in libvirt. A rough highlight of changes
> since last time:
> 
>  - Can override /etc/xen by setting LIBVIRT_XM_CONFIG_DIR env variable
>    for people who move it to non-standard location
>  - Several memory corruption bugs in config file refresh were solved
>  - Fixed booting with paravirt framebuffer + grub
>  - Added support for new APIs to python binding
>  - Removed logic for supressing 404 errors (already merged earlier)
>  - More complete device handling support (now creates network devices)
> 
> Previous posting was here:
> 
> http://www.redhat.com/archives/libvir-list/2006-September/msg00003.html

I forgot to mention, there is a branch of the main virt-manager codebase
which adds support for managing inactive domains. This is the main way I
have been validating correct operation of these patches (along with the
standard virsh).

 http://hg.et.redhat.com/virt/applications/virt-manager--passive

The only issue this has exposed was not in the patches themselves, but
in XenD - the filtering of currently running domains from the inactive
domain list imposes a non-trivial performance hit. This is because of
the absolutely ridiculous number of XenStored database transactions that
XenD triggers. I've investigated many ways around this, but none made any
signficant difference - this ultimately has to be fixed in xenstored
which is something targetted for xen 3.0.4

Regards,
Dan.
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