Open Stack

I have this flag in compute nodes' nova.conf file

--
block_migration_flag=VIR_MIGRATE_UNDEFINE_SOURCE,VIR_MIGRATE_PEER2PEER,VIR_MIGRATE_NON_SHARED_INC
--

When I try to migrate an instance I see the following error. Basically it
says the instance's files are not found in destination compute node.
Should'nt it copy and create it self?

Stderr: "qemu-nbd: Failed to bdrv_open
'/var/lib/nova/instances/ae8b4bb2-1c87-46d5-9e75-b6f5a619d6ca/disk': No
such file or directory\n"


What am I missing?

Thanks
Paras.
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