7:46 a.m.
Hi all,
I'm a graduate student in Shanghai, and will do experiment about live migration using
KVM as hypervisor.
Due to my demand, I want to get each iteration time and downtime in migration.
I found there is no API to implement it, and how can I obtain data I want?
Thanks very much.
Best wishes,
Yale Yuan
4:38 a.m.
On Tue, Mar 26, 2013 at 12:46:52 +0000, Yuan, Ye A wrote:
Hi all,
I'm a graduate student in Shanghai, and will do experiment about live migration using
KVM as hypervisor.
Due to my demand, I want to get each iteration time and downtime in migration.
I found there is no API to implement it, and how can I obtain data I want?
Libvirt provides virDomainGetJobStats API which gives you all migration
statistics data provided by QEMU (via query-migrate QMP command). If you
need something more, you would need to add reporting of the required
additional statistics to QEMU first.
Jirka
6:09 a.m.
Jiri thank you, and I will attempt to do some research using virDomainGetJobStats API.
Any stupid questions I will ask you later if necessary. :)
Best wishes,
Yale Yuan
-----Original Message-----
From: Jiri Denemark [mailto:jdenemar@redhat.com]
Sent: Wednesday, March 27, 2013 5:38 PM
To: Yuan, Ye A
Cc: libvir-list(a)redhat.com
Subject: Re: [libvirt] How to get iteration time & downtime?
On Tue, Mar 26, 2013 at 12:46:52 +0000, Yuan, Ye A wrote:
Hi all,
I'm a graduate student in Shanghai, and will do experiment about live migration using
KVM as hypervisor.
Due to my demand, I want to get each iteration time and downtime in migration.
I found there is no API to implement it, and how can I obtain data I want?
Libvirt provides virDomainGetJobStats API which gives you all migration statistics data
provided by QEMU (via query-migrate QMP command). If you need something more, you would
need to add reporting of the required additional statistics to QEMU first.
Jirka
7:22 a.m.
New subject: [libvirt] FW: How to get iteration time & downtime?
Jiri, sorry for my stupid.
I read your instruction about your API, but there is no function do get 'iteration
time'.
Does that mean I should implement it by myself?
And if I want to get the dirty page bitmap, should I review libvirt source code and print
information to log file during migration?
Best wishes,
Yale Yuan
-----Original Message-----
From: Yuan, Ye A
Sent: Wednesday, March 27, 2013 7:09 PM
To: 'Jiri Denemark'
Cc: libvir-list(a)redhat.com
Subject: RE: [libvirt] How to get iteration time & downtime?
Jiri thank you, and I will attempt to do some research using virDomainGetJobStats API.
Any stupid questions I will ask you later if necessary. :)
Best wishes,
Yale Yuan
-----Original Message-----
From: Jiri Denemark [mailto:jdenemar@redhat.com]
Sent: Wednesday, March 27, 2013 5:38 PM
To: Yuan, Ye A
Cc: libvir-list(a)redhat.com
Subject: Re: [libvirt] How to get iteration time & downtime?
On Tue, Mar 26, 2013 at 12:46:52 +0000, Yuan, Ye A wrote:
Hi all,
I'm a graduate student in Shanghai, and will do experiment about live migration using
KVM as hypervisor.
Due to my demand, I want to get each iteration time and downtime in migration.
I found there is no API to implement it, and how can I obtain data I want?
Libvirt provides virDomainGetJobStats API which gives you all migration statistics data
provided by QEMU (via query-migrate QMP command). If you need something more, you would
need to add reporting of the required additional statistics to QEMU first.
Jirka
7:47 a.m.
New subject: [libvirt] FW: How to get iteration time & downtime?
On Wed, Mar 27, 2013 at 12:22:39 +0000, Yuan, Ye A wrote:
I read your instruction about your API, but there is no function do
get 'iteration time'.
Right, you can only get downtime. The reason is that QEMU does not
provide statistics about iteration time.
Does that mean I should implement it by myself? And if I want to get
the dirty page bitmap, should I review libvirt source code and print
information to log file during migration?
Well, it's not libvirt where you need to be looking. The migration is
done in QEMU, libvirt just controls it. In other words, you need to go
to QEMU sources to get more statistics about migration. And in case you
need any guidance or answers for your questions, qemu-devel(a)nongnu.org
is the primary list for QEMU developers.
Jirka
8:11 a.m.
New subject: [libvirt] FW: FW: How to get iteration time & downtime?
:):):)
I found that QEMU do migration and libvirt invoke it
Thanks your help, Jiri!!!!!
I will view QEMU source code ~~~!!!
Best wishes,
Yale Yuan
-----Original Message-----
From: Jiri Denemark (jdenemar(a)redhat.com) [mailto:jdenemar@redhat.com]
Sent: Wednesday, March 27, 2013 8:47 PM
To: Yuan, Ye A
Cc: libvir-list(a)redhat.com
Subject: Re: FW: [libvirt] How to get iteration time & downtime?
On Wed, Mar 27, 2013 at 12:22:39 +0000, Yuan, Ye A wrote:
I read your instruction about your API, but there is no function do
get 'iteration time'.
Right, you can only get downtime. The reason is that QEMU does not provide statistics
about iteration time.
Does that mean I should implement it by myself? And if I want to get
the dirty page bitmap, should I review libvirt source code and print
information to log file during migration?
Well, it's not libvirt where you need to be looking. The migration is done in QEMU,
libvirt just controls it. In other words, you need to go to QEMU sources to get more
statistics about migration. And in case you need any guidance or answers for your
questions, qemu-devel(a)nongnu.org is the primary list for QEMU developers.
Jirka
4263
days inactive
4264
days old
5 comments
3 participants
participants (3)
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Jiri Denemark -
Jiri Denemark (jdenemar＠redhat.com)
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Yuan, Ye A