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Sigh...
http://docs.fedoraproject.org/en-US/Fedora/13/html/Virtualization_Guide/sect-Virtualization-Tips_and_tricks-Overcommitting_with_KVM.html
also this one:
http://www.linux-kvm.org/wiki/images/f/ff/2011-forum-memory-overcommit.pdf
You do know that KSM was made by the KVM devs?
If you get your customers mad, they will leave you. End of story.
I see~ Thanks for documentation
I'm not mad, so I'm not overselling them for my customers, I'm just testing :P
Shhht, don't tell anyone!
Ah, is that why a number of offers says XXXX dedicated RAM, and xxx burstable RAM
i think it's only on OpenVZ
I always wonder why people think you can only oversell OpenVZ... All virtualizations are made with over committing capabilities to effectively utilize corporate resources...
i am new, thanks for the infos
That was an ancient post on Chinese forums, which gives the false information.
But most people would repost without any thinking. That's the reason that this rumour still lasts...
AFAIK, you can't oversell VMWare.
VMWare it is bulid for that
thin provision, vcpu, memory compresion, memory baloning.... it got it all (other hypervisors do not have memory compression) table1
https://labs.vmware.com/vmtj/memory-overcommitment-in-the-esx-server
VMware supports disk & memory overselling both.
Disk overselling can happen only if you thin-provision. If you thick-provision your disks, you can't oversell. As for Memory, it may be true to a point.
That's like saying "You can move faster if you run. If you don't run, you don't move faster". Like.. no shit.
And yes, you can overcommit in VMware every way you want.