[ale] QCOW2 Performance?

[Jim Kinney]

No idea but that's a very good question. 

Study time and talk later are appreciated!

On Wed, 2015-02-11 at 15:52 -0500, DJ-Pfulio wrote:
> QCOW2 Performance?
> 
> Does anyone have incite into the performance of qcow2 for kvm VMs on spinning
> HDDs?
> 
> How much slower will they be than raw images is really my question.
> 
> I did some testing between vdmk, vdi and images on virtualbox a few years ago -
> raw images were much faster.  Then last year, I tested VDI sparse, VDI
> pre-allocated and QCOW to find that VDI had improved greatly and was within
> 5-10% of raw image performance. QCOW was 4x slower. Used the same spinning HDD,
> no SSDs for the tests.
> 
> So, is qcow2 performance even close to raw images for spinning disks?
>