Xen users - Feb 2007 - Determining server load

Hi all,

I was wondering if anyone knows of a way to get a clear picture of an
entire server, dom0s including domUs. This could be important in
determining which server would be a candidate for another domU, when
we need extra services, without interfering too much with the rest of
the setup.

Is there a way to get a clear view of the cpu load and the IO load on
a complete machine?

-- 
Gegroet,
Tim

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Hi All,

Does anyone know if rpms for xen 3.0.4 are available for OpenSUSE 10.2.  I can
only google the OpenSUSE factory rpms which are 3.0.3.

Thanks in advance,

Steve.



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On 2/11/07, Tim Stoop <tim.stoop@gmail.com> wrote:
> Is there a way to get a clear view of the cpu load
Apart from me gfailing to see what you mean with "clear view":

xentop, xm list --long
> and the IO load on
> a complete machine?
Net IO can also be seen in Xentop, and in xm output I think, as well
as in ifconfig. I don''t know of disk IO, but I also don''t know
where
to see disk IO data apart from benchmark tools, which is not what we
talk about here, I assume)

Henning

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On 2/11/07, Henning Sprang <henning_sprang@gmx.de>
wrote:
> Apart from me gfailing to see what you mean with "clear view":
Ah yeah, sorry about that. I meant, without Xen you can get some
statistics of your server (load and mem usage, mostly) to determine if
you should run any more services on the machine. If either is too
high, you''re probably better off using another server (or reducing the
load first). It''s not something that is a clear yes or no, but at
least I''ve a gut feeling about it when I see the numbers.
> xentop, xm list --long
Okay, I''ll look into these.
> Net IO can also be seen in Xentop, and in xm output I think, as well
> as in ifconfig. I don''t know of disk IO, but I also don''t
know where
> to see disk IO data apart from benchmark tools, which is not what we
> talk about here, I assume)
Ah, yeah, I was a thinking about something like "vmstat -d" and a tool
like mrtg to display the activity. But I want to see the activity for
the complete machine, not just for one domU.

Any thoughts?

--
Gegroet,
Tim

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On Sun, Feb 11, 2007 at 01:32:30PM +0100, Tim Stoop
wrote:
> Is there a way to get a clear view of the cpu load and the IO load on
> a complete machine?
It is not the most trivial way to measure things, but you can
calculate CPU usage per domain by the rate at which the cpu time
counters from "xm list" or "xm list --long" increase.  This
can be
graphed.

Per device IO load can be gauged from "iostat -x" output, which
works for me since I use LVM for my domU block devices.

It would be great if there were some way to export some CPU and IO
counters for all domU, from dom0 say via SNMP.  I have not found
anything though, and I guess this sort of thing is not a Xen Source
priority.

Cheers,
Andy


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Hi Steve,
lists@higgers.me.uk wrote:
> Hi All,
>
> Does anyone know if rpms for xen 3.0.4 are available for OpenSUSE
> 10.2.  I can
> only google the OpenSUSE factory rpms which are 3.0.3. 
I had the same problem. It seems there won''t be any 3.0.4 packages
available for 10.2. I think they''ll be released for 10.3.

Jan

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Quoting Jan Albrecht <jan.albrecht@gmail.com>:
> Hi Steve,
> lists@higgers.me.uk wrote:
>> Hi All,
>>
>> Does anyone know if rpms for xen 3.0.4 are available for OpenSUSE
>> 10.2.  I can
>> only google the OpenSUSE factory rpms which are 3.0.3.
> I had the same problem. It seems there won''t be any 3.0.4 packages
> available for 10.2. I think they''ll be released for 10.3.
>
> Jan
If that''s the case then has anyone got 3.0.4 working successfully on
OpenSUSE
10.2?  I seem to remember reading a message (possibly from Henning 
Sprang) that
said 3.0.4 didn''t work well.  However, my memory isn''t that
good! :-)

Thanks,

Steve.
>
> _______________________________________________
> Xen-users mailing list
> Xen-users@lists.xensource.com
> http://lists.xensource.com/xen-users
>



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Hi,

 > I had the same problem. It seems there won''t be any 3.0.4
packages
 > available for 10.2. I think they''ll be released for 10.3.
you ever tried these packages:

http://forge.novell.com/modules/xfmod/project/?xenpreview

I''m not quite sure on which level they are right now, but in the past 
they always included the latest one!


BTW: I also had success installing the binary-distribution of the 
xen-source 3.0.2-packages on OSS 10.0, 10.1 and SLES 10 Beta some time 
ago, so probably it also can run with 3.0.4 on OSS 10.2!
-- 

Chau y hasta luego,

Thorolf

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On 2/13/07, lists@higgers.me.uk <lists@higgers.me.uk>
wrote:
> Quoting Jan Albrecht <jan.albrecht@gmail.com>:
>
> > Hi Steve,
> > lists@higgers.me.uk wrote:
> >> Hi All,
> >>
> >> Does anyone know if rpms for xen 3.0.4 are available for OpenSUSE
> >> 10.2.  I can
> >> only google the OpenSUSE factory rpms which are 3.0.3.
> > I had the same problem. It seems there won''t be any 3.0.4
packages
> > available for 10.2. I think they''ll be released for 10.3.
> >
> > Jan
>
> If that''s the case then has anyone got 3.0.4 working successfully
on OpenSUSE
> 10.2?  I seem to remember reading a message (possibly from Henning
> Sprang) that
> said 3.0.4 didn''t work well.  However, my memory isn''t
that good! :-)
Yes, I worked for me. No problem at all, I had just do disable USB
support in my kernel, as my DL380 won''t properly boot with that.

But I did switch back to SLES10 and the xenpreview kernel from novell
as they fit much better im XEN strategy.

But 3.0.4 on openSuSE 10.2 worked not as stable as I supposed to.

Jan

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