06.05.2019 7:24, Liang Li wrote:
> On Tue, Apr 30, 2019 at 10:35:32AM +, Vladimir Sementsov-Ogievskiy wrote:
>> 28.04.2019 13:01, Liang Li wrote:
>>> If the backup target is a slow device like ceph rbd, the backup
>>> process will affect guest BLK write IO performance seriously,
>>> it's cause
On Tue, Apr 30, 2019 at 10:35:32AM +, Vladimir Sementsov-Ogievskiy wrote:
> 28.04.2019 13:01, Liang Li wrote:
> > If the backup target is a slow device like ceph rbd, the backup
> > process will affect guest BLK write IO performance seriously,
> > it's cause by the drawback of COW mechanism,
28.04.2019 13:01, Liang Li wrote:
> If the backup target is a slow device like ceph rbd, the backup
> process will affect guest BLK write IO performance seriously,
> it's cause by the drawback of COW mechanism, if guest overwrite the
> backup BLK area, the IO can only be processed after the data
If the backup target is a slow device like ceph rbd, the backup
process will affect guest BLK write IO performance seriously,
it's cause by the drawback of COW mechanism, if guest overwrite the
backup BLK area, the IO can only be processed after the data has
been written to backup target.
The
