Open Stack

Hi folks,


The vm has keeping migrating status in my openstack environment, 
when I use "nova live-migration --block-migrate vm_name dest_compute_node" this instruction.
Then I am checked the instance log at dest_compute_node(/var/log/libvirt/qemu/instance-00000331.log‍),
meet with ".....Completed 99 %^MDisabling I/O throttling on 'drive-virtio-disk0' due to synchronous I/O" the information.


Actually, I'm set the I/O rate limit of disk which adjust extra_specs property of openstack flavor.
Indeed, it's using libvirt/qemu to set xml file of instance attain rate limiting. I guess:)


and belowed‍[1][2] is  some fragments of my env.‍‍


So, Can someone please explain this situation for me, and, your help is a highly appreciated.‍‍
Thanks.


Joe


--[1]: source  compute node 
# virsh ‍list 
 112   instance-00000331              paused‍


--[2]: destination compute node
# virsh list
 170   instance-00000331              paused



--[3]: destination compute node
# vim /var/log/libvirt/qemu/instance-00000331.log‍
....
char device redirected to /dev/pts/22 (label charserial1)
Receiving block device images
Completed 0 %^MCompleted 1 %^MCompleted 2 %^MCompleted 3 %^MCompleted 4 %^MCompleted 5 %^MCompleted 6 %^MCompleted 7 %^MCompleted 8 %^MCompleted 9 %^MCompleted 10 %^MCompleted 11 %^MCompleted 12 %^MCompleted 13 %^MCompleted 14 %^MCompleted 15 %^MCompleted 16 %^MCompleted 17 %^MCompleted 18 %^MCompleted 19 %^MCompleted 20 %^MCompleted 21 %^MCompleted 22 %^MCompleted 23 %^MCompleted 24 %^MCompleted 25 %^MCompleted 26 %^MCompleted 27 %^MCompleted 28 %^MCompleted 29 %^MCompleted 30 %^MCompleted 31 %^MCompleted 32 %^MCompleted 33 %^MCompleted 34 %^MCompleted 35 %^MCompleted 36 %^MCompleted 37 %^MCompleted 38 %^MCompleted 39 %^MCompleted 40 %^MCompleted 41 %^MCompleted 42 %^MCompleted 43 %^MCompleted 44 %^MCompleted 45 %^MCompleted 46 %^MCompleted 47 %^MCompleted 48 %^MCompleted 49 %^MCompleted 50 %^MCompleted 51 %^MCompleted 52 %^MCompleted 53 %^MCompleted 54 %^MCompleted 55 %^MCompleted 56 %^MCompleted 57 %^MCompleted 58 %^MCompleted 59 %^MCompleted 60 %^MCompleted 61 %^MCompleted 62 %^MCompleted 63 %^MCompleted 64 %^MCompleted 65 %^MCompleted 66 %^MCompleted 67 %^MCompleted 68 %^MCompleted 69 %^MCompleted 70 %^MCompleted 71 %^MCompleted 72 %^MCompleted 73 %^MCompleted 74 %^MCompleted 75 %^MCompleted 76 %^MCompleted 77 %^MCompleted 78 %^MCompleted 79 %^MCompleted 80 %^MCompleted 81 %^MCompleted 82 %^MCompleted 83 %^MCompleted 84 %^MCompleted 85 %^MCompleted 86 %^MCompleted 87 %^MCompleted 88 %^MCompleted 89 %^MCompleted 90 %^MCompleted 91 %^MCompleted 92 %^MCompleted 93 %^MCompleted 94 %^MCompleted 95 %^MCompleted 96 %^MCompleted 97 %^MCompleted 98 %^MCompleted 99 %^MDisabling I/O throttling on 'drive-virtio-disk0' due to synchronous I/O.‍

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