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xen-users
Re: [Xen-users] KVM vs XEN source
We must somehow define the level of discussion. Yes, some guys do
wants some box software to run their ten vms in some near-soho
environment (install and forget). In those terms we must not talk
about xen, but about, f.e. Xen Cloud Platform/XenServer.
But if we wants to talk about hypervisors, the point of discussion
shall move from 'box software' to more delicate and serious
questions about pure hypervisor questions. For example, the main
disadvantage for xen is very thick virtualization - no page sharing
(except directly declared by drivers), very cooperative mode for
suspend/resume (and migration) processes, relatively bad performance
on huge network load (I never saw guests producing more than 6-8G
compare to native 30Gbps over loop in linux), lack of file-based
disk space distribution (i'm not talking about img on FS, i'm
talking about virtio).
I don't know how KVM doing, if it make all those things better -
well, it'll be nice. But right now KVM is very young product. And
there is nice phrase 'every software suck intil version 3'. Let's
wait for kvm 3 and see what happens...
On 09.08.2011 00:09, Scott Damron wrote:
You mention Amazon as using XEN like it is some off
the shelf XEN install. It is definitely not. The same goes for
3Tera/CA. Sure, they use XEN, but that stuff is no where NEAR the
stock XEN software. When people pimp the fact that Amazon or some
other large institution uses XEN, it makes everyone believe that
they can have a setup like those mentioned above with little to no
effort. Please justify that type of comment when you make them.
Thanks!
On Mon, Aug 8, 2011 at 3:01 PM, Jeff
Sturm <jeff.sturm@xxxxxxxxxx>
wrote:
Xen
has some very large deployments (Amazon EC2). It's
not easy to say what kind of market share KVM has
these days, assuming a minority of all Red Hat
customers actually use it. I think it's fair to say
KVM has an uphill battle to fight with the likes of
Xen and VMWare on the market. Ultimately if both
products are very good, small margins of performance
won't matter to most users.
Red
Hat took a big gamble on a niche virtualization
technology, since in my opinion they don't have the
market muscle to make KVM a dominant player. Time
will tell how this works out for them. I've also
seen posts from people saying (in effect): "You
should try out KVM, it is very good." I believe
they're probably right. The problem for KVM
supporters is they haven't given me any reason to
switch. (And before someone mentions it, I don’t
count dom0 support as a reason, since I have no
business requirement to run RHEL 6 on each piece of
hardware I own.)
Given enough effort, anything is
possible. At this point in time, I definitely
think Xen is better than KVM. If Xen development
stalled and KVM development continued to move
forward, KVM could become better at some point in
time. Predications tend to be tricky, though.
About 50 years ago, everybody assumed we would all
drive flying cars by now.
-----Original
Message-----
From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
[mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx]
On Behalf Of Bruno Steven
Sent: Monday, August 08, 2011 10:12 AM
To: Xen User-List
Subject: [Xen-users] KVM vs XEN source
Hi Dear,
I read in foruns , sites especialized that KVM will
be better than XEN sourcer on next years. It is
possible ? Somebody has some link that bring
comparation beteween Xen souce and KVM ?
Thank very much
--
Bruno Steven - Administrador de sistemas
LPIC-2 / MCSA-Windows 2003 / CompTIA Security+
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