
Design a url shortener service that creates short aliases redirecting to long urls, like tiny url or bit.ly, to save space and reduce mistyped links while enabling tracking.
Clarify the goals and requirements for a URL shortening system, covering functional, non-functional, and extended needs like unique short links, redirects, expiration, high availability, and REST API analytics.
Explore the load balancing layer across the client, app servers, database, and caching servers, starting with round robin and evolving to intelligent load-aware routing.
Describe component design of the application layer, including write and read workflows, six-letter key generation, duplicate handling, and a two-tier data store with metadata and object storage.
Present Pastebin system design diagram, detailing client and application servers with load balancing, caching layers, object storage, metadata storage, and a key generation service with a standby key database replica.
Design a photo sharing service like Instagram, enabling upload, view, search by photo titles, and a newsfeed of top posts with 200 ms latency, high availability, and reliability.
Build a high load photo service with reliable storage and low latency, estimating capacity and supporting upload and view or search flows using object storage for images and metadata database.
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