Le Tuesday 28 August 2007 08:05:59 GNUbie, vous avez écrit : > Hello Jim, > > On 8/28/07, Jim Crilly <jim@why.dont.jablowme.net> wrote: > > You can't give each VM (or domU in Xen terms) all of your memory so at > > the very least you'll have to rethink that part of your setup. > > Then how will I allocate memory for each domU? What's the best practice > for this kind of setup? > > As for the CPUs, > > > Xen 3.0 and up does seem to support SMP domUs but I can't imagine it > > would be a very good idea to give multiple domUs all 4 CPUs. > > What can you advice then based from your experience? > > If you have this kind of machine, how will you design your Xen domUs in > such a way that you can properly utilize all your hardware components with > the optimum performance for your network services as well as hosting > different web domains you plan to deploy in a production environment? > > Please advice. > > Thank you in advance. > > GNUbie Start simple : - 1 vCPU per domU, try to let one for dom0, specially if it manages a complex storage (soft RAID, DRBD, LVM, iSCSI...) - Let at least 512Mo for dom 0, spread the rest on your domUs depending on what they do. Good to know, you can change the memory allocated for a domU online ! Make some tests, load tests. If you know or you see that some tasks are slow because they can't be parallelised, add a vCPU to the domU. The essential here, is to know what your domUs will really do, and how much you planned.
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