[et-mgmt-tools] Xen 'production' services - are we there yet?

[Michael DeHaan]

Aaron Lippold wrote:
> Hi,
>
> Thanks so much for the thoughts. So, I would assume then that a 'Xen
> production env' has advantages not really in quote unquote
> consolidation but flexibility? 

Consolidation and resource utilization can be valuable -- especially 
when existing apps are originally speced out to run on different boxes 
and there's
no reason they need that much hardware.   There are also the hardware 
isolation / QA advantages.

> What's the one line ROI then to the
> management in your opinion?
>
>   

I want to help, but I don't speak MBA-language :)

> A
>
> On 10/23/07, Richard W.M. Jones <rjones at redhat.com> wrote:
>   
>> Richard W.M. Jones wrote:
>>     
>>> We found virtualisation made a great solution for isolating different
>>> servers from each other.  We had previously had a problem where our
>>> Apache required so many different modules to support the various
>>> different services we were running that the Apache config became
>>> extremely fragile.  No such problem with Xen however since we just ran
>>> different Apache instances on different guests, with a web accelerator
>>> in front of them (a stripped down Apache with mod_proxy) so that all the
>>> backend Apaches would appear on the same IP address.  You could reboot a
>>> backend server easily if it failed without affecting any other
>>> production service.
>>>       
>> I should add that if you do consider an Apache configuration like the
>> above, then this little module is an absolute life-saver:
>>
>> http://stderr.net/apache/rpaf/
>>
>> Rich.
>>
>> --
>> Emerging Technologies, Red Hat - http://et.redhat.com/~rjones/
>> Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod
>> Street, Windsor, Berkshire, SL4 1TE, United Kingdom.  Registered in
>> England and Wales under Company Registration No. 03798903
>>
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>>     
>
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