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-   -   Switching From VMware ESXi to KVM? (http://www.linuxquestions.org/questions/linux-virtualization-and-cloud-90/switching-from-vmware-esxi-to-kvm-875925/)

carlosinfl 04-19-2011 01:05 PM

Switching From VMware ESXi to KVM?
 
I've been hearing a lot of great things about KVM over ESXi or Xen. I've been using VMware ESXi Hypervisor for almost 1 year now and I find it very annoying that in order to manage my VM clients, I MUST use a Windows machine with a Vsphere client that connects to the VMware host. I am sick of catering or managing a Windows VM on my desktop for this need. I was wondering if I will see any performance gain or benefits switching to KVM? I don't know a lot of KVM other than it's pre-loaded into the kernel now and performs a hair or two better than Xen. Not sure how reliable that info is however. Can anyone please tell me if they feel the trouble / time would be worth moving from VMware to KVM? I can't really complain about VMware performance. It's been very good from my perspective but it's the only thing I've ever used and can't compare to anything else.

Thanks!

paulsm4 04-19-2011 02:47 PM

Hi -

Absolutely buy a copy of the February "Admin" magazine (it's still on many newstands). It has an excellent summary of the leading VM products, from an enterprise Admin's perspective:

http://www.admin-magazine.com/conten...ackup-showdown

PS:
There's no one "right answer". You definitely want to evaluate the different candidates, and see what's best for your shop.

PPS:
I'm not delighted that XenServer requires you to use the (Windows-only) XenCenter for GUI administration. But - like VMWare - you don't absolutely *need* the Windows GUI. It just makes life that much easier ;)

dyasny 04-20-2011 05:21 AM

what stops you from trying KVM out?

acid_kewpie 04-20-2011 05:44 AM

1 Attachment(s)
I have to post this file... We were using KVM in a huge project very successfully and someone with a VMware invoice said we had to change to ESX. This was their formal "proof" that KVM kills babies. I hope it does NOT help you!

I found KVM to be great, in an environment that wasn't heavily clustered or resilient (we had hundreds of identical machines, so didn't want things to move around a la vmotion etc, although it's still possible.) and extremely versatile and flexible with a little scripting, much much easier to work with that ESX

dyasny 04-20-2011 05:59 AM

acid_kewpie, wow, this is one of the more ugly loads of bs vmware has piled on kvm so far. Anyhow, while applied to CentOS _some_ of the points might be partially true (lack of proper support for example), the rest are not even close, and are an outright lie. Actually, this is a very nice indicator of how much vmware are scared of KVM :)

acid_kewpie 04-20-2011 06:23 AM

Quote:

Originally Posted by dyasny (Post 4330330)
acid_kewpie, wow, this is one of the more ugly loads of bs vmware has piled on kvm so far. Anyhow, while applied to CentOS _some_ of the points might be partially true (lack of proper support for example), the rest are not even close, and are an outright lie. Actually, this is a very nice indicator of how much vmware are scared of KVM :)

Well this was a totally internal thing, nothing to do with VMware themselves. At the base of the "discussions" we were having, I feel that virtualization should not, in itself, be seen to be a specifically interesting thing anymore. Your enterprise worthy operating system will provide functionality for virtualized / partitioned machines at some level and it is no more interesting that the choice of scsi driver etc. VMware made it a product, but it's not one any more, hence ESXi being free.

We had some really simple build scripts using tools like koan and func to deploy VM's direct to the KVM hosts in a flash, and had to replace it with a corporately centralized vCenter implementation which was slow and very unreliable. The ignorance some people have amazes me, they just get so comfy with that they did last time, everything else is obviosuly wrong.


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