Configurage no_compression_image_types

Registered by Daniel Speichert

Ability to configure image types for which transfer will not use compression when migrating instance.

This value was previously hardcoded to disable compression for qcow2 only.
In real world scenario, compressing raw images during migration makes it
CPU-bound (single core) instead of network-bound, slowing it down to about 8 mbps in tests.

Disabling compression for RAW naturally allows to saturate network link without saturating CPU core.

Operators may prefer to disable compression for raw images.

Blueprint information

Status:
Started
Approver:
Sylvain Bauza
Priority:
Medium
Drafter:
Daniel Speichert
Direction:
Approved
Assignee:
Daniel Speichert
Definition:
Approved
Series goal:
Accepted for yoga
Implementation:
Needs Code Review
Milestone target:
None
Started by
Daniel Speichert

Related branches

Sprints

Whiteboard

https://review.opendev.org/c/openstack/nova/+/817995

[20211124 bauzas] Accepted as a specless BP by the last meeting, provided no change in the default behaviour
https://meetings.opendev.org/meetings/nova/2021/nova.2021-11-23-16.00.html

(?)

Work Items

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