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On Sun, 1 Jul 2007, Rio wrote:
>>> http://linux-vserver.org/Welcome_to_Linux-VServer.org
>>>
>>> we have been running it for a year now with absolutely
>>> no hiccups whatsoever and no excessive loading! we have
>>> 84 virtual servers on 1 machine and 40 on
I didn't get my point across it seems. Let's see if I can do
a better job.
You have one box which is running 84 instances of a virtual
server and another box which has 40 instances. So you have
two boxes which can appear to be 124 realservers?
>> Trying to find out why people use virtual servers for
>> realservers
>> The next question then is why don't you have the big server
>> which is currently split into 84 realservers as just one big
>> realserver? If you need failover (do virtual servers fail?)
>> why not just 5 machines (enough that you'll only loose 20%
>> on failure)?
I understand that its cheaper, less cooling etc to have a
single large box than 84 separate boxes.
> if i am understanding you to mean you want me to split it
> into 84 complete virtual machines that advertise their own
> virtual hardware? too much overhead and wasted resources.
so you have 84 virtual machines but they don't appear to be
84 individual machines?
> we do have several instances where virtualized hardware is
> required. we have one host running esx server for just
> that need. but by far the most common needs are easily met
> using linux-vserver.
>
> if i understand you to mean combine the 84 servers into
> one server running all the services, that cannot be. some
> of those are rented colo space and i will not allow a
> customer access to our hosts.
OK so not all of your virtual instances are being used for
LVS realservers.
> i have become a firm believer
> in context virtuals.
what are "context virtuals" (nothing useful found in
google).
> far less overhead than virtual hardware (who needs 84
> kernels running all doing basically the same thing?).
I thought you had 84 virtual machines. Clearly I don't know
what you have.
What is the hardware running these 84 machines (number CPUs,
number NICs etc)? How many virtual instances are
realservers? Why don't you just have a small number of
realservers, each one getting a larger share of the
resources rather than a large number of realservers, each of
which gets a small fraction of the resources?
Thanks Joe
--
Joseph Mack NA3T EME(B,D), FM05lw North Carolina
jmack (at) wm7d (dot) net - azimuthal equidistant map
generator at http://www.wm7d.net/azproj.shtml
Homepage http://www.austintek.com/ It's GNU/Linux!
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