Hi Daniel,

Did you get a chance to check this out ? Please let me know....

On Wednesday, December 21, 2022, Gk Gk <ygk.kmr@gmail.com> wrote:
> I have just created a new vm and rechecked the disk stats. This time around too, they seem to be different as shown below:
> From libvirt python library:
> ---
> disk_name=sda read_req=10501,read_bytes=263819776,write_req=1933,write_bytes=82269184
> ---
>
> So the write_bytes from above amounted to 78 MB approx.
> But from within the vm :
> ---
> root@sample2:~# iostat -p sda -h
> Linux 4.15.0-101-generic (sample2) 12/21/2022 _x86_64_ (1 CPU)
>
> avg-cpu:  %user   %nice %system %iowait  %steal   %idle
>            1.9%    0.0%    1.3%    0.4%    0.0%   96.4%
>
> Device             tps    kB_read/s    kB_wrtn/s    kB_read    kB_wrtn
> sda
>                  40.45       643.6k        21.2M     217.5M       7.2G
> sda1
>                  40.04       637.6k        21.2M     215.5M       7.2G
> ----
> 7.2 G is far from 78 MB.   Am I doing wrong anywhere ? Btw, I did not reboot the new vm this time
>
>
>
> On Wed, Dec 21, 2022 at 9:30 PM Daniel P. Berrangé <berrange@redhat.com> wrote:
>>
>> On Wed, Dec 21, 2022 at 09:26:14PM +0530, Gk Gk wrote:
>> > Thanks Daniel for the response.
>> >
>> > I am wondering what exactly is the difference in the process for a soft and
>> > hard reboot in the context of a kvm guest ? Can you throw some light here
>> > please ?
>>
>> KVM will always do a soft reboot, where QEMU keeps running.
>>
>>
>> With regards,
>> Daniel
>> --
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>>
>