[Gllug] Constrained virtual machines

[Jim Bailey]

On Dec 13, 01:15, paul at ma1.se wrote:
> Jim Bailey wrote:
> >On Dec 01, 10:57, Karanbir Singh wrote:
> >>Richard Huxton wrote:
> >>>James Roberts wrote:
> >>>>Karanbir Singh wrote:
> >>>>>does vmware-server ( also, like vmware-player, free to download and 
> >>>>>use ) not meet your requirement ?
> >>>>I think he has got that already. He wants fine-grained cpu and other 
> >>>>resource control for testing. vmware-server only offers very crude cpu 
> >>>>control (1 processor, 2 processors...) although the memory allocated 
> >>>>can be fine-grained.
> >>>Yeah - what I'd like to be able to do is have a virtual-machine limited 
> >>>to e.g. the speed of a 1GHz P4 with 512MB RAM and something that looks 
> >>>like a single IDE disk. And then change all those parameters on the next 
> >>>test run. And it needs to be *all* of them, otherwise the tests will be 
> >>>unbalanced.
> >>>
> 
> As for disco I/O its all quota based with OpenVZ/Virtuozzo simfs/vzfs 
> filesystem, the VM isn't mounted on file or disc image so I would have 
> said that coupled with the fact you are only running one 
> (OpenVZ/Virtuozzo) kernel it was as close to "bare metal" as possible in 
> terms of performance.

They talk of a 2-3% performance hit but I take that with a pinch of
salt.
> 
> The developers of OpenVZ are very helpful on the forums and mailing 
> lists - www.openvz.org

I lurk on the OpenVZ forums and list and can second that I have often
found the answer to my Virtuozzo problems in the OpenVZ forums before I
get a reply from SWsoft support.
 
OpenVZ is a much under rated and under utilised platform and deserves a
little bit of Xen's glory.

-- 
Peace Jim :-)

 Those who make peaceful revolution impossible will make violent revolution inevitable
 -- JFK

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