Re: KVM Block Device Driver

Wolfgang Richter
2013-08-14T14:47:44Z

Still interested and back to working on this. I taught a couple
classes this summer which killed my time in June - July.

So Chad, are you already logging all accesses? Or do you need
something quick to log them?

I have a patch to QEMU mainline (very small) to add block I/O tracing,
but it works via the log subsystem and might not fit your environment
if you wanted a production solution.

--
Wolf

On Wed, Aug 14, 2013 at 10:07 AM, Stefan Hajnoczi <stefanha@gmail.com> wrote:
> On Wed, Aug 14, 2013 at 07:29:53AM -0400, Spensky, Chad - 0559 - MITLL wrote:
>> We are trying to keep an active shadow copy while the system is running
>> without any need for pausing. More precisely we want to log every
>> individual access to the drive into a database so that the entire stream
>> of accesses could be replayed at a later time.
>
> CCing Wolfgang Richter who was previously interested in block I/O
> tracing:
> https://lists.nongnu.org/archive/html/qemu-devel/2013-05/msg01725.html
>
> Stefan

--
Wolf