System requirements

Functional:

1. Tagging: Users should be able to add tags to digital items.
2. Search: Users should be able to search for digital items based on tags.
3. Edit: Users should be able to edit or remove tags from digital items.
4. Tag Suggestions: Provide tag suggestions based on existing tags or content.
5. Normalization: Normalize tags to ensure consistency and reduce duplicates.
6. Tag Collaboration: Consider features like collaborative tagging or shared tag collections for teamwork purposes.
7. Tag Popularity: Track and display information about popular tags to aid users in discovery and improve search relevance.

Non-Functional:

1. Scalability: The system should be able to handle a large number of users and digital items.
2. Performance: Tags should be quickly retrieved and searchable even with a large number of items.
3. Reliability: The system should be reliable and available even under high load.
4. Security: User data and tags should be secure and protected.
5. Usability: The tagging service should be user-friendly and intuitive for users to interact with.
6. Security: Implement access controls to restrict unauthorized access to user data and tags. Consider encryption for sensitive information.
7. Internationalization: If applicable, design the service to be adaptable to different languages and cultural contexts.

Capacity estimation

Estimate the scale of the system you are going to design...

API design

Define what APIs are expected from the system...

Storage Requirements for Tagging Service

Here's how to estimate the storage requirements for your tagging service, considering the below assumptions:

Digital Items:

• Number of items (num_items) = 100 million
• Average item size (avg_item_size) = 500 KB (convert to bytes: 500 * 1024)

Tags:

• Maximum tags per item (max_tags_per_item) = 10
• Tag length (tag_length) = 128 characters (assuming UTF-8 encoding for 1 byte per character)

Calculations:

Storage for digital items:

item_storage = num_items * avg_item_size item_storage = 100,000,000 * 500 KB item_storage = 50,000,000,000 KB item_storage = 50 TB

Storage for tags:

tag_storage = num_items * max_tags_per_item * tag_length tag_storage = 100,000,000 * 10 * 128 tag_storage = 128,000,000,000 bytes tag_storage = 128 GB

Total storage:

total_storage = item_storage + tag_storage total_storage = 50 TB + 128 GB

Database design

Defining the system data model early on will clarify how data will flow among different components of the system. Also you could draw an ER diagram using the diagramming tool to enhance your design...

High-level design

You should identify enough components that are needed to solve the actual problem from end to end. Also remember to draw a block diagram using the diagramming tool to augment your design. If you are unfamiliar with the tool, you can simply describe your design to the chat bot and ask it to generate a starter diagram for you to modify...

Request flows

Explain how the request flows from end to end in your high level design. Also you could draw a sequence diagram using the diagramming tool to enhance your explanation...

Detailed component design

Dig deeper into 2-3 components and explain in detail how they work. For example, how well does each component scale? Any relevant algorithm or data structure you like to use for a component? Also you could draw a diagram using the diagramming tool to enhance your design...

Trade offs/Tech choices

Explain any trade offs you have made and why you made certain tech choices...

Failure scenarios/bottlenecks

Try to discuss as many failure scenarios/bottlenecks as possible.

Future improvements

What are some future improvements you would make? How would you mitigate the failure scenario(s) you described above?