Xen vs KVM vs ESXi

From: Eric Wolf 
I'm currently running ESXi at home - a bit of an overkill since I only have
one VM on it. I'm setting up a new VM server and was wondering if I should
try something else. What opinions do y'all have?


Eric B. Wolf                           720-334-7734

=============================================================== From: Lynn Dixon ------------------------------------------------------ I am a big KVM fan since its built into the kernel (for a while now, but cant remember what kernel version it was introduced). I run all of my VM's on my laptop using KVM. I like using virt-manager and virsh to manage the machines, and then I use Spice as the remote-control and display protocol. Spice allows you to redirect USB to the guest, and even do on the fly display resizing of the guest as you resize the window. I would also recommend oVirt if you are looking for a great web based console and the ability to manage 1 to many hosts. I use this in my home lab on an old IBM x3650 as a host. oVirt is also the upstream for Red Hat's RHEV product. Heres the website: http://www.ovirt.org oVirt is based on KVM as well. You should give it a go! Its pretty nice, and the web console is really slick.

=============================================================== From: Mike Harrison ------------------------------------------------------ I'll give credit to Adam for making me a believer in KVM/Qemu. My understanding of it is minimal, which means it "just works". The few times I've needed to do something with it, it's been a bit of a pain to figure it out, edit the text file or issue the command, but so far, it always "just works". Servers on it are long term stable, run smooth, and seem to not have issues like clock slew that I saw in our very limited playing with vmPlayer. We can even use USB ports for serial communications.

=============================================================== From: Ed King ------------------------------------------------------ not exactly "kvm" but "we" have had 40 netbooks running qemu on windows for= a year now... =A0 with the qemu accelerator installed the performance of t= he vm is damn close to the same app running natively on linux.=A0=A0=A0 We = did have clock skew but ntpclient solved that ;-)=A0=A0 Biggest problem see= ms to be when the host os (windows) looses mi-fi connectivity, the vm loose= s its networking also (of course), but the problem is that the vm continues= to act a fool even when the=A0 mi-fi signal comes back to the host.=A0=A0 = We have a cheesy workaround in place, because we are the Masters of Cheese. anyway, another vote for kvm/qemu --- On Thu, 2/21/13, Eric Wolf wrote: From: Eric Wolf Subject: [Chugalug] Xen vs KVM vs ESXi To: "CHUGALUG" Date: Thursday, February 21, 2013, 12:51 AM I'm currently running ESXi at home - a bit of an overkill since I only have= one VM on it. I'm setting up a new VM server and was wondering if I should= try something else. What opinions do y'all have?=0A -Eric -=3D--=3D---=3D----=3D----=3D---=3D--=3D-=3D--=3D---=3D----=3D---=3D--=3D-= =3D- Eric B. Wolf =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 720-334-77= 34 =0A =0A=0A -----Inline Attachment Follows-----

=============================================================== From: Adam Jimerson ------------------------------------------------------ Qemu/kvm is a great choice, even more so with the release of Qemu 1.4, which brings the proformance of virtio block devices, network and hard drives, to almost being on par with the host machine. Of course this all depends on if your guest supports virtio block dewices or not.

=============================================================== From: "kitepilot@kitepilot.com" ------------------------------------------------------ I have a sort-of dual boot laptop that I can boot on Linux or Win7. Howerver, when I boot Linux, I can also use Virtualbox to boot the Win7 partition under a VM. Can I do that with Qemu/kvm? ET Eric Wolf writes:

=============================================================== From: "kitepilot@kitepilot.com" ------------------------------------------------------ Or! (even better) Can I have a minimal underlying Qemu/kvm installation to run Linux/Win7 side by side and still be able to boot either standalone? ET Eric Wolf writes:

=============================================================== From: Bret McHone ------------------------------------------------------ Is there a reason to move away from esxi? Im fine with a lot of what preople proposed, im just curious about what it is specifically yoi are looking for. -Bret

=============================================================== From: Adam Jimerson ------------------------------------------------------ ET, I have not tried it to the scale you are talking about, but it should be possible. I know that with Qemu/kvm you can point it to a raw partition instead of using file based storage with the VM. I know that you can also pass the VM the same processor information an the host, but you may have some problems with things with NIC, Graphics, and Audio as there is no way to pass the details on the host device to the guest currently that I know of.

=============================================================== From: James Nylen ------------------------------------------------------ How do you set this up?

=============================================================== From: "kitepilot@kitepilot.com" ------------------------------------------------------ You create a 'raw partition' virtual HD, take the boot sector of the real HD and install it on the virtual, fix (or break) some permissions and you are good to go. I can be more specific if you want to try it yourself, I have a cookbook somewhere... ET James Nylen writes:

=============================================================== From: Jonathan Calloway ------------------------------------------------------ I am interested in this. Please send a link if you have posted this somewhere. Jonathan Calloway Sent from my iPad