KVM Virtulization better than OpenVZ Virtualization ?

Breezehost

What do you think KVM Virtualization better than OpenVZ Virtualization ? Because I am thinking provide KVM virtual server to our clients .

xenu

KVM provides greater separation, so, obviously, it's better than OpenVZ from client's view.

Ash_Hawkridge

KVM Is just as good as Xen... but then again OpenVZ is usually faster than both of them when under the right management (Due to less overhead).

Bare in mind KVM does not allow overselling of HD space, RAM can be oversold but all in all thats just a bad move. (Due to swap etc) so make sure you plan everything out beforehand.

And for the record, SolusVM and KVM interaction is "Limited" to say the least.

Breezehost

Thanks for yours suggestion

MrAndroid

RedHat actually recommend you oversell KVM,

OpenVZ isn't even virtualisation in my opinion, but it's still amazing.

Ash_Hawkridge

@Daniel

Sources for the RedHat info? I would like to read it. I cant see how it would be a good thing to do.

Agreed on the OpenVZ point and yes when its properly managed, its a real winner.

Mon5t3r

http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6/html/Virtualization_Administration_Guide/sect-Virtualization-Tips_and_tricks-Overcommitting_with_KVM.html

you can try to put SSD drive for swap if you want. i already did that and look good. but i prefer not overcommitting the memory.

Ash_Hawkridge

Thank's Mon5t3r . We dont over-commit memory with KVM either and our 4 drive 15K SAS2 RAID10 array handles swap just fine

Mon5t3r

sure you don't. i recommending that config for personal use only. but really,, the I/O is very tempting.. hahahaha

Ash_Hawkridge

TBH with hard drive prices atm it would be hard to oversell RAM because you would have already ran out of HD space with 500GB setups :P

MrAndroid

@VMPort said: Sources for the RedHat info? I would like to read it. I cant see how it would be a good thing to do.

Agreed on the OpenVZ point and yes when its properly managed, its a real winner.

I'm trying to find the exact page it was on, but I found this. http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6/html/Virtualization_Administration_Guide/sect-Virtualization-Tips_and_tricks-Overcommitting_with_KVM.html

Its basically saying if done properly, overcommitting saves money, power, energy, which is a good thing?