Re: [Xen-users] How many VMs on single server...

["Alessandro R." <lord2y@xxxxxxxxx>]

2007/8/23, Andy Smith <andy@xxxxxxxxxxxxxx>:
> Hi Alessandro,
>
> No, since it depends on what resources the individual domains need.
>
> For example, my users tend to use more IO than CPU or RAM, so I
> always run out of disk spindles before I run out of disk space, RAM
> or CPU.
> Others may well have users that need a lot of RAM, or are CPU-bound,
> or whatever.

Ok. So it's a stitistic of usage. I have to see what the user do to
calculate what is the
best conf of each VM right?

> > For example: in my setting I have one server with Intel Xeon 3050 Dual
> > Core - single socket - with 4GB Ram and 2 hdd of 250GB SATA; hard
> > drive is mirroring with software RAID and I'm using an image disk for
> > xen VM. I want run only HVM vm.
> >
> > How many VMs can I run on this?
>
> One, if it needs ~4G RAM and ~250G of disk.

:D

>
> > Now I'm using RAM as delta (suppose to give 5-10 GB of disk space):
> > if I give for each VM 256MB of RAM I will be able to start 14 domU
> > with 90 - 100 MB of RAM in dom0.
>
> You will have no problem starting and running 14, 15, 20, 30, maybe
> 100s of domains.

> Whether they have enough resources to do what you want them to do is another 
> question.
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

I can't understand this paragraph. Can you explain?

thanks.

regards.


-- 
Alessandro R.

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