Re: [Qemu-devel] [PATCH 0/2] improve qemu-img conversion performance

2011-09-12 Thread Kevin Wolf
Am 12.09.2011 05:17, schrieb Yehuda Sadeh Weinraub: > On Sun, Sep 11, 2011 at 8:14 PM, Sage Weil wrote: >> On Fri, 9 Sep 2011, Kevin Wolf wrote: >>> Am 08.09.2011 18:36, schrieb Sage Weil: On Thu, 8 Sep 2011, Kevin Wolf wrote: > Am 08.09.2011 01:06, schrieb Yehuda Sadeh: >> The follow

Re: [Qemu-devel] [PATCH 0/2] improve qemu-img conversion performance

2011-09-12 Thread Yehuda Sadeh Weinraub
On Sun, Sep 11, 2011 at 8:17 PM, Yehuda Sadeh Weinraub wrote: > On Sun, Sep 11, 2011 at 8:14 PM, Sage Weil wrote: >> On Fri, 9 Sep 2011, Kevin Wolf wrote: >>> Am 08.09.2011 18:36, schrieb Sage Weil: >>> > On Thu, 8 Sep 2011, Kevin Wolf wrote: >>> >> Am 08.09.2011 01:06, schrieb Yehuda Sadeh: >>>

Re: [Qemu-devel] [PATCH 0/2] improve qemu-img conversion performance

2011-09-11 Thread Yehuda Sadeh Weinraub
On Sun, Sep 11, 2011 at 8:14 PM, Sage Weil wrote: > On Fri, 9 Sep 2011, Kevin Wolf wrote: >> Am 08.09.2011 18:36, schrieb Sage Weil: >> > On Thu, 8 Sep 2011, Kevin Wolf wrote: >> >> Am 08.09.2011 01:06, schrieb Yehuda Sadeh: >> >>> The following set of patches improve the qemu-img conversion proce

Re: [Qemu-devel] [PATCH 0/2] improve qemu-img conversion performance

2011-09-11 Thread Sage Weil
On Fri, 9 Sep 2011, Kevin Wolf wrote: > Am 08.09.2011 18:36, schrieb Sage Weil: > > On Thu, 8 Sep 2011, Kevin Wolf wrote: > >> Am 08.09.2011 01:06, schrieb Yehuda Sadeh: > >>> The following set of patches improve the qemu-img conversion process > >>> performance. When using a higher latency backend

Re: [Qemu-devel] [PATCH 0/2] improve qemu-img conversion performance

2011-09-09 Thread Kevin Wolf
Am 08.09.2011 18:36, schrieb Sage Weil: > On Thu, 8 Sep 2011, Kevin Wolf wrote: >> Am 08.09.2011 01:06, schrieb Yehuda Sadeh: >>> The following set of patches improve the qemu-img conversion process >>> performance. When using a higher latency backend, small writes have a >>> severe impact on the t

Re: [Qemu-devel] [PATCH 0/2] improve qemu-img conversion performance

2011-09-08 Thread Sage Weil
On Thu, 8 Sep 2011, Stefan Hajnoczi wrote: > On Wed, Sep 07, 2011 at 04:06:51PM -0700, Yehuda Sadeh wrote: > > The following set of patches improve the qemu-img conversion process > > performance. When using a higher latency backend, small writes have a > > severe impact on the time it takes to do

Re: [Qemu-devel] [PATCH 0/2] improve qemu-img conversion performance

2011-09-08 Thread Sage Weil
On Thu, 8 Sep 2011, Kevin Wolf wrote: > Am 08.09.2011 01:06, schrieb Yehuda Sadeh: > > The following set of patches improve the qemu-img conversion process > > performance. When using a higher latency backend, small writes have a > > severe impact on the time it takes to do image conversion. > > W

Re: [Qemu-devel] [PATCH 0/2] improve qemu-img conversion performance

2011-09-08 Thread Kevin Wolf
Am 08.09.2011 01:06, schrieb Yehuda Sadeh: > The following set of patches improve the qemu-img conversion process > performance. When using a higher latency backend, small writes have a > severe impact on the time it takes to do image conversion. > We switch to using async writes, and we avoid spl

Re: [Qemu-devel] [PATCH 0/2] improve qemu-img conversion performance

2011-09-08 Thread Stefan Hajnoczi
On Wed, Sep 07, 2011 at 04:06:51PM -0700, Yehuda Sadeh wrote: > The following set of patches improve the qemu-img conversion process > performance. When using a higher latency backend, small writes have a > severe impact on the time it takes to do image conversion. > We switch to using async write

[Qemu-devel] [PATCH 0/2] improve qemu-img conversion performance

2011-09-07 Thread Yehuda Sadeh
The following set of patches improve the qemu-img conversion process performance. When using a higher latency backend, small writes have a severe impact on the time it takes to do image conversion. We switch to using async writes, and we avoid splitting writes due to holes when the holes are small