Why would ephemeral instance disks be copied if the backing store is
a shared system like Ceph.
Sorry for the confusion, I tried to describe the workflow if you use
local disk storage for the instances. Of course there's no disk
copying if you use a storage like ceph.
Zitat von Jay Pipes <[email protected]>:
On 01/25/2017 03:19 AM, Eugen Block wrote:
All these instances are in our ceph cluster.
The instance path is defined in nova.conf:
# Where instances are stored on disk (string value)
instances_path = $state_path/instances
If one compute node fails but it's able to initiate a migration, the
same instance directory is created on the new host and the disks are
copied to its new compute node.
Why would ephemeral instance disks be copied if the backing store is
a shared system like Ceph. There would be no need to copy a disk
image since the destination host's /var/lib/nova/instances directory
is exactly the same as the source's, right?
Best,
-jay
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