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xen-users
Re: [Xen-users] what makes a good xen machine?
Whats the official way to pin a hyperthread to dom0?
xm pincpu 0 dom0?
Thanks,
-Tim
--
Timothy Doyle
CEO
Quantact Hosting Solutions, Inc.
tim@xxxxxxxxxxxx
http://www.quantact.com
M.A. Williamson wrote:
Well...
It all depends on what you're doing. There are a few rules of thumb,
though:
* Hyperthreading helps (though not essential) - if dom0 can have a
dedicated hyperthread, it can run all the time servicing other domains
with having to be context-switched in and out. * You need enough
memory to give *each* virtual machine (including dom0), plus some
extra for Xen itself. Because the memory is hard-partitioned (you
can't overcommit) you need to have enough for all the domains. *
Processor speed needs to be enough to cope with the computation you're
doing across all the virtual machines (+ a bit extra for overheads).
For very demanding network loads (small packets at GigE line rate),
you need lots of CPU (i.e. true SMP) but since this is a pessimal
case, its unlikely you have a workload that requires it.
Cheers,
Mark
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