Re: [Qemu-devel] drive-backup

2016-02-26 Thread Stefan Priebe
Am 25.02.2016 um 20:53 schrieb John Snow: On 02/25/2016 02:49 AM, Stefan Priebe - Profihost AG wrote: Am 22.02.2016 um 23:08 schrieb John Snow: On 02/22/2016 03:21 PM, Stefan Priebe wrote: Hello, is there any chance or hack to work with a bigger cluster size for the drive backup job?

Re: [Qemu-devel] drive-backup

2016-02-25 Thread John Snow
On 02/25/2016 02:49 AM, Stefan Priebe - Profihost AG wrote: > > Am 22.02.2016 um 23:08 schrieb John Snow: >> >> >> On 02/22/2016 03:21 PM, Stefan Priebe wrote: >>> Hello, >>> >>> is there any chance or hack to work with a bigger cluster size for the >>> drive backup job? >>> >>> See: >>>

Re: [Qemu-devel] drive-backup

2016-02-25 Thread Fam Zheng
On Thu, 02/25 08:49, Stefan Priebe - Profihost AG wrote: > > Am 22.02.2016 um 23:08 schrieb John Snow: > > > > > > On 02/22/2016 03:21 PM, Stefan Priebe wrote: > >> Hello, > >> > >> is there any chance or hack to work with a bigger cluster size for the > >> drive backup job? > >> > >> See: > >>

Re: [Qemu-devel] drive-backup

2016-02-24 Thread Stefan Priebe - Profihost AG
Am 22.02.2016 um 23:08 schrieb John Snow: > > > On 02/22/2016 03:21 PM, Stefan Priebe wrote: >> Hello, >> >> is there any chance or hack to work with a bigger cluster size for the >> drive backup job? >> >> See: >>

Re: [Qemu-devel] drive-backup

2016-02-22 Thread John Snow
On 02/22/2016 03:21 PM, Stefan Priebe wrote: > Hello, > > is there any chance or hack to work with a bigger cluster size for the > drive backup job? > > See: >

[Qemu-devel] drive-backup

2016-02-22 Thread Stefan Priebe
Hello, is there any chance or hack to work with a bigger cluster size for the drive backup job? See: http://git.qemu.org/?p=qemu.git;a=blob;f=block/backup.c;h=16105d40b193be9bb40346027bdf58e62b956a96;hb=98d2c6f2cd80afaa2dc10091f5e35a97c181e4f5 This is very slow with ceph - may be due to the

Re: [Qemu-devel] drive-backup locks VM if target has issues?

2013-09-30 Thread Paolo Bonzini
Il 30/09/2013 00:46, Wolfgang Richter ha scritto: I wanted to explore overhead with the new drive-backup command and I noticed if I set the target to something like '/dev/null' the guest VM starts having IO errors and loses write access to its root file system. Here is the qmp-shell command

Re: [Qemu-devel] drive-backup locks VM if target has issues?

2013-09-30 Thread Wolfgang Richter
On Mon, Sep 30, 2013 at 3:41 AM, Paolo Bonzini pbonz...@redhat.com wrote: Il 30/09/2013 00:46, Wolfgang Richter ha scritto: All writes to the drive-backup source have to first copy the pre-write data to the target. Thus, drive-backup usually works best if you are using werror=stop on the

[Qemu-devel] drive-backup locks VM if target has issues?

2013-09-29 Thread Wolfgang Richter
I wanted to explore overhead with the new drive-backup command and I noticed if I set the target to something like '/dev/null' the guest VM starts having IO errors and loses write access to its root file system. Here is the qmp-shell command I'm using: drive-backup sync=none device=virtio0