Design a Shared Calendar Service
Design a distributed shared calendar service, akin to modern online calendar products, capable of handling tens of millions of daily active users and storing billions of events. The service must provide low-latency reads for daily and weekly calendar views.
Core Functionality
Users should be able to:
- Create and manage multiple calendars.
- Create, edit, and delete events.
- Invite attendees to events.
- Accept or decline event invitations.
- View their personal agenda.
- View free/busy availability for other users.
- Configure and receive reminders for events.
- Create and manage recurring events.
- Share calendars with other users, defining different permission levels.
Discussion Areas
Your design should cover the following aspects:
- Detailed requirements and assumptions.
- API design for core functionalities.
- Data model for events, calendars, users, and invitations.
- Overall system architecture.
- Storage solutions and indexing strategies.
- Consistency models for shared data.
- Specific handling of recurring events.
- Design for reminders and notifications.
- Management of time zones.
- Scalability considerations for high user load and data volume.
- Strategies for failure handling and disaster recovery.
AI interview prep
Core dilemma
Balancing extreme read throughput for complex time-series queries (daily/weekly views) with the intricate logic of recurring events, time zones, and distributed consistency for shared calendars and invitations, all at a massive scale.
3 tradeoffs and 3 stress tests locked
Interview prep
Unlock the interviewer X-Ray rubric, tradeoff matrix, stress tests, clarifying questions, and key concepts.
Design a Shared Calendar Service
Design a distributed shared calendar service, akin to modern online calendar products, capable of handling tens of millions of daily active users and storing billions of events. The service must provide low-latency reads for daily and weekly calendar views.
Core Functionality
Users should be able to:
- Create and manage multiple calendars.
- Create, edit, and delete events.
- Invite attendees to events.
- Accept or decline event invitations.
- View their personal agenda.
- View free/busy availability for other users.
- Configure and receive reminders for events.
- Create and manage recurring events.
- Share calendars with other users, defining different permission levels.
Discussion Areas
Your design should cover the following aspects:
- Detailed requirements and assumptions.
- API design for core functionalities.
- Data model for events, calendars, users, and invitations.
- Overall system architecture.
- Storage solutions and indexing strategies.
- Consistency models for shared data.
- Specific handling of recurring events.
- Design for reminders and notifications.
- Management of time zones.
- Scalability considerations for high user load and data volume.
- Strategies for failure handling and disaster recovery.