Editor engagement experiments/Bucketing

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Viable bucketing criteria

The following data points are cached and are therefore feasible for us to use as bucketing criteria for high-volume experiments. (Use of some of these data points may be restricted for extraneous reasons; their inclusion here reflects their viability from the perspective of engineering only.)

1. user_id
2. user_name
3. user_password
4. user_newpassword
5. user_newpass_time
6. user_email
7. user_email_authenticated
8. user_real_name
9. user_token
10. user_registration
11. user_editcount
12. user_touched

Items on the list correspond to columns on the MediaWiki user table.

Bucket Verification

We should utilize a non-bucketing debug mode accessible via URL parameters (e.g. debug=true&exp=XYZ&bucket=ABC) to visualize a specific design/condition. Relying upon page refresh and cookie removal until being assigned to the correct bucket is problematic.