Hello all! **Any and all schemas that are not designated for migration will be deprecated. Datasets who rely on deprecated schemas will no longer receive data* *Background:* - The Modern Event Platform (MEP) <https://www.mediawiki.org/wiki/Wikimedia_Technology/Annual_Plans/FY2019/TEC2:_Modern_Event_Platform> will be the new infrastructure for building services that produce and consume event data for analytics and production. In order to take advantage of the new platform data, schemas need to be migrated from the old format (EventLogging) on meta to the new MEP specification. Given all teams have schemas, instrumentation and process surrounding the previous way of generating event data, teams will be required to shift in how they instrument and produce these events moving forward on the new MEP. - To do this, we must - Make a copy of the original Event Logging schema into the new system and - Change the name of the original schema to legacy_<name> - Any instrumentation using the original schema will automatically use the updated schema. There is no change in application code. Events will flow to the same database table. There should be no interruption in data, and there is a QA process in place during this transition. - Consequences for you and your team: - Any future modifications to the schema will need to be made in the new system - A few additional fields will appear in your database table - Switching the schema in this way will not make the features of the Modern Event Platform project available immediately. To get these features, we need to author a fresh schema and update the instrumentation code. This is the final step of the migration and will be done in concert with Data Scientists and Product Teams at a later date. - You can find out more about our Migration Plan & Timeline <https://docs.google.com/document/d/1LZ3ZijXePGqur3LAkH9LWSmkTBuTZuGJPlgHeiISwx4/edit#>[3] and reach out to me if you have any further questions [1] https://docs.google.com/spreadsheets/d/1WXbGPyuu2S6TYvrb-DvWWmrEx_K7TJ5rYPk… [2] https://www.mediawiki.org/wiki/Wikimedia_Technology/Annual_Plans/FY2019/TEC… [3] https://docs.google.com/document/d/1LZ3ZijXePGqur3LAkH9LWSmkTBuTZuGJPlgHeiI… Best, -- Seve Kim *(he/him)* Sr. Technical Product Manager <https://wikimediafoundation.org/> *"Imagine a world in which every single human being can freely share in the sum of all knowledge. That's our commitment."*