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Re: [Xen-users] How to share all memory between DomUs ?

On Sat, Aug 16, 2014 at 4:22 AM, Gary M <garym@xxxxxxxxxx> wrote:

Is there a way in the configuration to share all the memory space between DomUs?Â


You'd need kernel/OS-level virtualization (e.g. lxc, openvz) for that.
And make all the memory in Dom0 available to 'a' DomU ?

No. There are always be memory needed for dom0.

If you want to maximize your guest's memory, what you can do is:
- dedicate small ammount memory to dom0 and preventing dom0 memory ballooning (IIRC for minimal setup 256MB should be enough), and configure the rest for a domU
- use other virtualization solution that can do memory overcommit (e.g. vmware). Note that memory overcommit comes at performance penalty (due to swapping).
- useÂkernel/OS-levelÂvirtualization that can be configured to allow a guest to use all of hosts' available memory (e.g. lxc). In this type of setup, the memoryÂoverhead of the host can be very small (< 100 MB)

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