A message broker decouples producers from consumers by providing a durable, ordered, partitioned log. Producers append messages to topics; consumers […]
An event bus is a pub/sub messaging system designed for event-driven architectures: services publish domain events, and multiple subscribers react
An object storage system provides a flat, scalable store for arbitrary binary data (objects) addressed by a bucket name and
A block storage system exposes raw storage as fixed-size blocks (typically 4 KB or 512 bytes) arranged into logical volumes.
A vector database stores high-dimensional embedding vectors and enables fast approximate nearest neighbor (ANN) search — finding the top-K vectors
A column-family store organises data in a hierarchy: keyspace → table → partition → rows. The partition key determines which
A graph database stores entities as nodes and relationships as edges, with properties on both. Unlike relational databases that simulate
A time-series database (TSDB) is purpose-built for append-heavy, time-ordered metric data. Its key design decisions — chunk storage, timestamp and
Synonym Expansion System: Overview Synonym expansion augments search queries with equivalent or related terms so that a search for “automobile”
Document Store System: Overview A document store persists and retrieves arbitrary JSON documents. Unlike relational databases, it does not enforce
Key-Value Store System: Overview A key-value store is the simplest distributed database: keys map to opaque binary values. Despite its
Proximity Search System: Overview A proximity search system finds entities (restaurants, drivers, users) within a geographic radius of a query
Typeahead Autocomplete System: Overview A typeahead (autocomplete) system returns ranked query completions as the user types, with latency under 50ms
Spell Checker System: Overview A spell checker takes an input word (potentially misspelled) and returns a ranked list of correction
User Activity Feed: Overview A user activity feed aggregates events from actors a user follows and surfaces them in reverse-chronological
