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Re: [Xen-users] can Xen use swap instead or RAM?

To: George Shuklin <george.shuklin@xxxxxxxxx>
Subject: Re: [Xen-users] can Xen use swap instead or RAM?
From: Martinx - ジェームズ <thiagocmartinsc@xxxxxxxxx>
Date: Fri, 24 Sep 2010 16:24:20 -0300
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Mmm... You mean this:


On 24 September 2010 15:49, George Shuklin <george.shuklin@xxxxxxxxx> wrote:
Yes, It is nice technology, but it still do not allow hypervisor
swapping or overselling. :)

В Птн, 24/09/2010 в 14:57 -0300, Martinx - ジェームズ пишет:
> Hi!

>  The Xen 4.0 introduces the TMEM project, take a look at it:

>  http://wiki.xensource.com/xenwiki/Xen4.0

>  TMEM allows improved utilization of unused (for example page cache)
> PV guest memory. more
> information: http://oss.oracle.com/projects/tmem/

> On 24 September 2010 14:46, George Shuklin <george.shuklin@xxxxxxxxx>
> wrote:
>         You can use swap of any size at VM level (every VM will have
>         it own
>         swap).
>         Right now there is no way to do hypervisor swap or oversell
>         memory.
>         В Птн, 24/09/2010 в 13:14 -0400, Boris Epstein пишет:
>         > Hello listmates,
>         >
>         > Let's say I've got a machine with 1 GB of RAM and I want to
>         host 3 512
>         > MB virtual machines on it? Is that possible - i.e., is it
>         possible to
>         > force Xen to use swap and pass it off as RAM to the VM's? I
>         know it is
>         > slow and inefficient but for the purposes of testing - is
>         that
>         > possible?
>         >

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