On Fri, Dec 8, 2017 at 4:18 PM Kevin Wolf wrote:
> Am 07.12.2017 um 23:45 hat Nir Soffer geschrieben:
> > The qemu bug https://bugzilla.redhat.com/713743 explains the issue:
> > qemu-img was writing disk images using writeback and fillingup the
> > cache buffers which are then flushed by the kern
Am 07.12.2017 um 23:45 hat Nir Soffer geschrieben:
> The qemu bug https://bugzilla.redhat.com/713743 explains the issue:
> qemu-img was writing disk images using writeback and fillingup the
> cache buffers which are then flushed by the kernel preventing other
> processes from accessing the storage.
On Thu, Nov 23, 2017 at 3:33 PM Yaniv Kaul wrote:
> On Thu, Nov 23, 2017 at 1:43 PM, Jiří Sléžka wrote:
>
>> well, another idea
>>
>> when I did not use the direct flag, the performace was much better
>>
>> 15787360256 bytes (16 GB) copied, 422.955159 s, 37.3 MB/s
>>
>
> That means you were hitt
