[Xen-users] Re: [Libvir] Xen physical host statistics
Mindaugas Kiznis
mk at splius.lt
Fri Aug 10 10:37:10 UTC 2007
Thank you for your quick answer. In my opinion, I/O statistics are
critical as CPU, memory usage in data center environment to optimally
plan, arrange, spread VMs in a resource or say Xenhost pool. Since there
are many Xen hosts in my case and this number is growing, it is a need
to monitor each host's resource usage in a centralized console, graphing
engine, etc. Hope to see these additions in the next releases of libvirt.
Best regards,
Mindaugas Kiznis
Richard W.M. Jones wrote:
> Mindaugas Kiznis wrote:
>> - I am trying to make an application, which would connect to a remote
>> xen host and fetch some information about total (physical) CPU usage,
>> total memory usage, network and disk I/O. I have managed to do a
>> remote statistics grabber for CPU and memory usage using libvirt. I
>> couldn't find any source of information about libvirt ability to
>> return I/O numbers. Also haven't found any other solution yet. Any
>> suggestions?
>
> It's very interesting that you should ask this, because I am
> investigating adding network I/O and block I/O stats to libvirt. We
> would get the information from /sys/devices/xen-backend/... in the
> same way that libxenstat does it at the moment, and pass that up
> through libvirt APIs. As with all libvirt-related stuff we need to
> think about how it will apply to the other hypervisors that we support
> and could support in the future.
>
> You are quite right that there is no facility for this in libvirt
> right now (just CPU-/memory-based stats at the moment).
>
> See also: http://et.redhat.com/~rjones/virt-top/
>
> Rich.
>
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