5M

Action Item Followup

Edward Zarecor

• Review status of last meeting’s action items.

20M

Present video mapping from Open edX tracking logs to xAPI

Quitterie Lucas

Proposition of the possible mapping of the video events from edX to xAPI:

• LoadVideo to Initialized

• PlayVideo to Played

• PauseVideo to Paused

• StopVideo to Terminate

• SeekVideo to Seeked

• SpeedChangeVideo to Interacted

Discuss possible mapping for:

• HideTranscript/ShowTranscript

• HideCCMenu/ShowCCMenu

It does not fit to any existing extensions of the interacted events

• Notes:

  • We need some guidance on how to approach the native events that are not covered by the video profile. Ed will reach out ADL

  • There is a delta between the existing mapping of video events in event_routing_backends and the ADL video profile.

  • We haven’t done the gap analysis to fully understand how much work this would be.

  • We also would need to think about how event_routing_backends will respect profiles. It currently doesn’t leverage them.

5-10M

Update on the message bus

Rebecca Graber (Deactivated)

• Current work: sending signals from studio to course-discovery

• Fundamental concerns:

  • What is an event?

    • A single field changing

    • A model changing

    • A user interaction

    • Example: COURSE_CATALOG_INFO_CHANGED vs COURSE_START_DATE_CHANGED

• Notes:

  • The 2U team is focused on deploying a single event to the bus in the next two weeks.

  • It’s important to understand that the terminology “event” is very overloaded.

    • The initial events that will be “teleported” or propogated across the micro-services are runtime events related to stage changes. A course is published in Studio and the changes to content or metadata need to be propagated to, say, the LMS and the Discovery services.

    • Events is also used to mean tracking log entries or “learning traces” in the xAPI world.

    • In the future we can imagine that learning trace events would be pushed onto the event bus. So, we want to consider the implications of the bus for the data stack.

    • That, however, is not an immediate plan or priority for the 2U Arch team.

10M?

MySQL encoding and collation thoughts

Dave Ormsbee (Axim)

• Migrating from utf8 to utf8mb4

  • Collation changes

  • Upgrade process

  • Relationship to MySQL 8.0

• Notes:

  • EOL for MySQL 5.7 is October

  • None of the attendees are actively working on the upgrade

  • There was also no intel currently on the requirements for migrating to utf8mb4, so the impact of that is still an unknown.