Before this work can be completed, T401396 must be resolved.
Assuming we get the all-clear from testing on test2wiki, our rollout plan is
- group0 at 10%
- group0 at 50% (optional)
- group0 at 100%
- group1 at 10%
- group1 at 50%
- group1 at 100%
- Pause to examine capacity and scale up if needed
- all non-enwiki at 10%
- all non-enwiki at 50%
- all non-enwiki at 100%
- capacity check
- enwiki at 10%
- enwiki at 50%
- enwiki at 100%