libvirt: Create option to enable parallel live migration
With increasing network speed, live-migration becomes quickly CPU bound.
QEMU introduced with 2.11 multifd, and libvirt with 5.2.0 VIR_MIGRATE_
options to parallelise the migration with multiple threads.
Since both versions precede the current minimum versions, there are no additional
requirements, and we simply can expose the feature as a configuration options to
the administrator with a default value that preserves the existing behaviour.
The configuration just needs to be set on the source host to take an effect, so no orchestration
of the change is needed.
The default could be
`[libvirt]
which would
- not set the `VIR_MIGRATE_
- and neither pass the option `parallel.
keeping the existing behavior.
Blueprint information
- Status:
- Not started
- Approver:
- None
- Priority:
- Undefined
- Drafter:
- Fabian Wiesel
- Direction:
- Needs approval
- Assignee:
- None
- Definition:
- New
- Series goal:
- None
- Implementation:
-
Unknown
- Milestone target:
- None
- Started by
- Completed by
Related branches
Related bugs
Sprints
Whiteboard
Addressed by: https:/
libvirt: Expose number of migration threads
