From: Michael Vrable <mvrable@cs.ucsd.edu>
To: Xen-devel@lists.sourceforge.net
Subject: Re: Copy-on-write memory to allow many more xenU domains per machine
Date: Tue, 26 Oct 2004 11:30:42 -0700 [thread overview]
Message-ID: <20041026113042.C27518@cs.ucsd.edu> (raw)
In-Reply-To: <417E0789.8030106@thegreen.co.uk>; from mpah@thegreen.co.uk on Tue, Oct 26, 2004 at 09:15:05AM +0100
On Tue, Oct 26, 2004 at 09:15:05AM +0100, Peri Hankey wrote:
> I hadn't been thinking of the honeypot scenario myself, but of the plain
> old 'more virtual computers than you would have thought possible' scene.
> From Ian's account of it there's less scope for that than I had imagined.
>
> I can be heavy slow myself ('heavy' is apparently Glaswgian slang for
> 'very' - think 'heavy light') - especially when immersed in the
> technical undergrowth.
"Memory Resource Management in VMware ESX Server" by Carl Waldspurger
has some numbers on memory sharing between VMs:
http://www.usenix.org/events/osdi02/tech/waldspurger/waldspurger.pdf
(This paper is also cited in the Xen SOSP 2003 paper.)
Sharing between identical machines is good, though sharing between
dissimilar machines is not as high as I remembered (copy-on-write
sharing is able to save around 7-30% of memory in real-world testing).
--Michael Vrable
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next prev parent reply other threads:[~2004-10-26 18:30 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-10-08 8:59 Shadow page tables? Chengyuan Li
2004-10-08 9:11 ` Keir Fraser
2004-10-10 2:52 ` Chengyuan Li
2004-10-12 18:50 ` Michael Vrable
2004-10-12 20:09 ` Andrew Warfield
2004-10-13 1:53 ` Michael Vrable
2004-10-21 8:38 ` Peri Hankey
2004-10-25 12:12 ` Copy-on-write memory to allow many more xenU domains per machine Peri Hankey
2004-10-25 12:21 ` Ian Pratt
2004-10-25 18:24 ` David Hopwood
2004-10-25 19:52 ` Ronald G. Minnich
2004-10-25 20:19 ` Ian Pratt
2004-10-25 22:38 ` Michael Vrable
2004-10-26 8:15 ` Peri Hankey
2004-10-26 18:30 ` Michael Vrable [this message]
2004-10-26 19:43 ` Ian Pratt
2004-10-26 22:19 ` Michael Vrable
2004-11-02 20:55 ` Jacob Gorm Hansen
2004-11-02 21:33 ` Ian Pratt
2004-11-02 21:50 ` urmk
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