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project_tracking.md

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Version-1 Checklist

item status
Development Done
Production In operation, Stable, under active testing
Web API Django + Django Rest Framework
DB MySQL
Background tasks Celery Beat
Deployment Nginx + Gunicorn on a EC2 T2 Medium instance
Performance On avg about 16-17ms to retrieve travel options for a single time slot (online service)

Problems with Version-1 (priority: high - low)

  • Updater not scalable. It uses a bring-all-in-then-update-sequentially scheme.

    • about 1 sec to update Parade & OTP options for a single entry
    • about 1.5 sec to update Uber options for a single entry

  • dev and production env not configurable

  • deployment should be completely automated

  • the map from timezone to city (otp router) won't work if there are multiple cities within one timezone

Plan for Version-2 (priority: high - low)

  • Make Updater scalable (multiple celery workers, request_future, Amazon Lambda)

  • Make dev and production env configurable and automated

  • Automate deployment/Wrap everything into virtual env

  • Visualize performance data with Periscope

  • support for Jenkins/Travis?

Tasks breakdown for Version-2

Category Tasks
Scale Updater Look into how to scale celery tasks
Scale Updater Support query travel option entries by range of slot id in API