Re: [Qemu-devel] [PATCH 0/7] qcow2: Reduce the number of I/O ops when doing COW

[Alberto Garcia]

On Wed 24 May 2017 06:09:42 PM CEST, Anton Nefedov wrote:

> I agree; as mentioned we have similar patches and they don't conflict
> much.  We noticed a performance regression on HDD though, for the
> presumably optimized case (random 4k write over a large backed image);
> so the patches were put on hold.

Interesting, I think that scenario was noticeably faster in my
tests. What cluster size(s) and image size(s) were you using?

Berto