[Xen-users] crazy SWAP and RAM idea

["SH Solutions" <info@xxxxxxxxxxxxxxx>]

Hi

I've been thinking about the following:

As every domU has it's own RAM, I cannot give as much memory to each domU,
as I wanted to.
So I gave them swap. That's LVM-backed.
But now, each domain that exceeds it's memory needs to swap pages in and
out, while other domains might not need their memory.

The idea to solve this, is a follows:

1. Give every domU as few memory as possible. (16MB?)
2. Give dom0 a huge fast swap space (several GB?)
3. Create a "RAMDRIVE" in dom0 in that swap.
4. Create domU's swap partitions on dom0's ramdrive.

The reason would be that dom0 can now "really" swap in pages as *REALLY*
needed from/to harddrive.
DomU's would then "only" swap from/to a partition that really is RAM and as
such really fast.

Seems a little crazy idea, but a way to make swaping more sensfull.

What do you think?

Regards,
  Steffen

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