Re: QEMU RBD is slow with QCOW2 images

2021-03-05 Thread Stefano Garzarella
On Fri, Mar 05, 2021 at 10:16:41AM +0100, Kevin Wolf wrote: Am 04.03.2021 um 18:32 hat Stefano Garzarella geschrieben: On Thu, Mar 04, 2021 at 03:59:17PM +0100, Kevin Wolf wrote: > Am 04.03.2021 um 15:08 hat Stefano Garzarella geschrieben: > > On Thu, Mar 04, 2021 at 01:05:02PM +0100, Kevin

Re: QEMU RBD is slow with QCOW2 images

2021-03-05 Thread Kevin Wolf
Am 04.03.2021 um 18:32 hat Stefano Garzarella geschrieben: > On Thu, Mar 04, 2021 at 03:59:17PM +0100, Kevin Wolf wrote: > > Am 04.03.2021 um 15:08 hat Stefano Garzarella geschrieben: > > > On Thu, Mar 04, 2021 at 01:05:02PM +0100, Kevin Wolf wrote: > > > > Am 03.03.2021 um 18:40 hat Stefano

Re: QEMU RBD is slow with QCOW2 images

2021-03-04 Thread Stefano Garzarella
On Thu, Mar 04, 2021 at 03:59:17PM +0100, Kevin Wolf wrote: Am 04.03.2021 um 15:08 hat Stefano Garzarella geschrieben: On Thu, Mar 04, 2021 at 01:05:02PM +0100, Kevin Wolf wrote: > Am 03.03.2021 um 18:40 hat Stefano Garzarella geschrieben: > > Hi Jason, > > as reported in this BZ [1], when

Re: QEMU RBD is slow with QCOW2 images

2021-03-04 Thread Kevin Wolf
Am 04.03.2021 um 15:08 hat Stefano Garzarella geschrieben: > On Thu, Mar 04, 2021 at 01:05:02PM +0100, Kevin Wolf wrote: > > Am 03.03.2021 um 18:40 hat Stefano Garzarella geschrieben: > > > Hi Jason, > > > as reported in this BZ [1], when qemu-img creates a QCOW2 image on RBD > > > writing data is

Re: QEMU RBD is slow with QCOW2 images

2021-03-04 Thread Stefano Garzarella
On Thu, Mar 04, 2021 at 01:05:02PM +0100, Kevin Wolf wrote: Am 03.03.2021 um 18:40 hat Stefano Garzarella geschrieben: Hi Jason, as reported in this BZ [1], when qemu-img creates a QCOW2 image on RBD writing data is very slow compared to a raw file. Comparing raw vs QCOW2 image creation with

Re: QEMU RBD is slow with QCOW2 images

2021-03-04 Thread Kevin Wolf
Am 03.03.2021 um 18:40 hat Stefano Garzarella geschrieben: > Hi Jason, > as reported in this BZ [1], when qemu-img creates a QCOW2 image on RBD > writing data is very slow compared to a raw file. > > Comparing raw vs QCOW2 image creation with RBD I found that we use a > different object size, for

Re: QEMU RBD is slow with QCOW2 images

2021-03-04 Thread Daniel P . Berrangé
On Thu, Mar 04, 2021 at 12:12:51PM +0100, Stefano Garzarella wrote: > On Thu, Mar 04, 2021 at 10:25:33AM +, Daniel P. Berrangé wrote: > > On Thu, Mar 04, 2021 at 09:55:40AM +0100, Stefano Garzarella wrote: > > > On Wed, Mar 03, 2021 at 01:47:06PM -0500, Jason Dillaman wrote: > > > > On Wed,

Re: QEMU RBD is slow with QCOW2 images

2021-03-04 Thread Stefano Garzarella
On Thu, Mar 04, 2021 at 10:25:33AM +, Daniel P. Berrangé wrote: On Thu, Mar 04, 2021 at 09:55:40AM +0100, Stefano Garzarella wrote: On Wed, Mar 03, 2021 at 01:47:06PM -0500, Jason Dillaman wrote: > On Wed, Mar 3, 2021 at 12:41 PM Stefano Garzarella wrote: > > > > Hi Jason, > > as reported

Re: QEMU RBD is slow with QCOW2 images

2021-03-04 Thread Daniel P . Berrangé
On Thu, Mar 04, 2021 at 09:55:40AM +0100, Stefano Garzarella wrote: > On Wed, Mar 03, 2021 at 01:47:06PM -0500, Jason Dillaman wrote: > > On Wed, Mar 3, 2021 at 12:41 PM Stefano Garzarella > > wrote: > > > > > > Hi Jason, > > > as reported in this BZ [1], when qemu-img creates a QCOW2 image on

Re: QEMU RBD is slow with QCOW2 images

2021-03-04 Thread Stefano Garzarella
On Wed, Mar 03, 2021 at 10:26:12PM +0100, Peter Lieven wrote: Am 03.03.21 um 19:47 schrieb Jason Dillaman: On Wed, Mar 3, 2021 at 12:41 PM Stefano Garzarella wrote: Hi Jason, as reported in this BZ [1], when qemu-img creates a QCOW2 image on RBD writing data is very slow compared to a raw

Re: QEMU RBD is slow with QCOW2 images

2021-03-04 Thread Stefano Garzarella
On Wed, Mar 03, 2021 at 01:47:06PM -0500, Jason Dillaman wrote: On Wed, Mar 3, 2021 at 12:41 PM Stefano Garzarella wrote: Hi Jason, as reported in this BZ [1], when qemu-img creates a QCOW2 image on RBD writing data is very slow compared to a raw file. Comparing raw vs QCOW2 image creation

Re: QEMU RBD is slow with QCOW2 images

2021-03-03 Thread Peter Lieven
Am 03.03.21 um 19:47 schrieb Jason Dillaman: > On Wed, Mar 3, 2021 at 12:41 PM Stefano Garzarella > wrote: >> Hi Jason, >> as reported in this BZ [1], when qemu-img creates a QCOW2 image on RBD >> writing data is very slow compared to a raw file. >> >> Comparing raw vs QCOW2 image creation with

Re: QEMU RBD is slow with QCOW2 images

2021-03-03 Thread Jason Dillaman
On Wed, Mar 3, 2021 at 12:41 PM Stefano Garzarella wrote: > > Hi Jason, > as reported in this BZ [1], when qemu-img creates a QCOW2 image on RBD > writing data is very slow compared to a raw file. > > Comparing raw vs QCOW2 image creation with RBD I found that we use a > different object size,

QEMU RBD is slow with QCOW2 images

2021-03-03 Thread Stefano Garzarella
Hi Jason, as reported in this BZ [1], when qemu-img creates a QCOW2 image on RBD writing data is very slow compared to a raw file. Comparing raw vs QCOW2 image creation with RBD I found that we use a different object size, for the raw file I see '4 MiB objects', for QCOW2 I see '64 KiB