Public bug reported:
Description
===========
I am trying to live migrate using --block-migration flag to move local disks
between compute nodes. As part of the I am setting
"live_migration_bandwidth=900" (MiB), able to see value applied by the libvirt,
but copying disks take very longer, definitely not using the above bandwidth.
Memory copy is ver faster & bandwidth applied properly
Steps to reproduce
==================
VM spec ( Pinned vm ) with disk OS-FLV-EXT-DATA:ephemeral 600 & root disk 10.
As part of migration using --block-migration copies disk first before the
actual memory transfer
from libvirt disk targets
Target Source
----------------------------------------------------------------------------------
vda /var/lib/nova/instances/84b43962-5623-42c2-9ecd-26e09753dead/disk
vdb /var/lib/nova/instances/84b43962-5623-42c2-9ecd-26e09753dead/disk.eph0
blockjob info for vdb
----
Block Copy: [ 12 %] Bandwidth limit: 943718400 bytes/s (900.000
MiB/s) ( applied bandwidth )
Actual speed is 59.3Mb while checking with iftop. It is clear that
actual bandwidth is not applied for the disk transfer
Expected result
===============
Disk copy should be done using the applied bandwidth
Actual result
=============
It is clear that actual bandwidth is not applied for the disk transfer.
It copied only after 40 min
13G disk.eph0
Environment
===========
Openstack version Yoga across both source & destination compute nodes
Logs & Configs
==============
** Affects: nova
Importance: Undecided
Status: New
** Description changed:
Description
===========
- I am trying to live migrate using --block-migration flag to move local disks
between compute nodes. As part of the I am setting
"live_migration_bandwidth=900" (MiB), able to see value applied by the libvirt,
but copying disks take very longer, definitely not using the above bandwidth.
Memory copy is ver faster & bandwidth applied properly
+ I am trying to live migrate using --block-migration flag to move local disks
between compute nodes. As part of the I am setting
"live_migration_bandwidth=900" (MiB), able to see value applied by the libvirt,
but copying disks take very longer, definitely not using the above bandwidth.
Memory copy is ver faster & bandwidth applied properly
Steps to reproduce
==================
- VM spec ( Pinned vm ) with disk OS-FLV-EXT-DATA:ephemeral 600 & root disk
10.
+ VM spec ( Pinned vm ) with disk OS-FLV-EXT-DATA:ephemeral 600 & root disk 10.
As part of migration using --block-migration copies disk first before the
actual memory transfer
from libvirt disk targets
- Target Source
+ Target Source
----------------------------------------------------------------------------------
- vda /var/lib/nova/instances/84b43962-5623-42c2-9ecd-26e09753dead/disk
- vdb
/var/lib/nova/instances/84b43962-5623-42c2-9ecd-26e09753dead/disk.eph0
-
+ vda /var/lib/nova/instances/84b43962-5623-42c2-9ecd-26e09753dead/disk
+ vdb
/var/lib/nova/instances/84b43962-5623-42c2-9ecd-26e09753dead/disk.eph0
blockjob info for vdb
----
Block Copy: [ 12 %] Bandwidth limit: 943718400 bytes/s (900.000
MiB/s) ( applied bandwidth )
Actual speed is 59.3Mb while checking with iftop. It is clear that
actual bandwidth is not applied for the disk transfer
-
Expected result
===============
Disk copy should be done using the applied bandwidth
-
Actual result
=============
- It is clear that actual bandwidth is not applied for the disk transfer
+ It is clear that actual bandwidth is not applied for the disk transfer.
+ It copied only after 40 min
+
+ 13G disk.eph0
Environment
===========
Openstack version Yoga across both source & destination compute nodes
Logs & Configs
==============
--
You received this bug notification because you are a member of Yahoo!
Engineering Team, which is subscribed to OpenStack Compute (nova).
https://bugs.launchpad.net/bugs/2008935
Title:
Yoga, Live migration bandwidth not applies to disks
Status in OpenStack Compute (nova):
New
Bug description:
Description
===========
I am trying to live migrate using --block-migration flag to move local disks
between compute nodes. As part of the I am setting
"live_migration_bandwidth=900" (MiB), able to see value applied by the libvirt,
but copying disks take very longer, definitely not using the above bandwidth.
Memory copy is ver faster & bandwidth applied properly
Steps to reproduce
==================
VM spec ( Pinned vm ) with disk OS-FLV-EXT-DATA:ephemeral 600 & root disk 10.
As part of migration using --block-migration copies disk first before the
actual memory transfer
from libvirt disk targets
Target Source
----------------------------------------------------------------------------------
vda /var/lib/nova/instances/84b43962-5623-42c2-9ecd-26e09753dead/disk
vdb
/var/lib/nova/instances/84b43962-5623-42c2-9ecd-26e09753dead/disk.eph0
blockjob info for vdb
----
Block Copy: [ 12 %] Bandwidth limit: 943718400 bytes/s (900.000
MiB/s) ( applied bandwidth )
Actual speed is 59.3Mb while checking with iftop. It is clear that
actual bandwidth is not applied for the disk transfer
Expected result
===============
Disk copy should be done using the applied bandwidth
Actual result
=============
It is clear that actual bandwidth is not applied for the disk
transfer. It copied only after 40 min
13G disk.eph0
Environment
===========
Openstack version Yoga across both source & destination compute nodes
Logs & Configs
==============
To manage notifications about this bug go to:
https://bugs.launchpad.net/nova/+bug/2008935/+subscriptions
--
Mailing list: https://launchpad.net/~yahoo-eng-team
Post to : [email protected]
Unsubscribe : https://launchpad.net/~yahoo-eng-team
More help : https://help.launchpad.net/ListHelp
