Low Level Design: Chunked Upload Service
What Is a Chunked Upload Service? A chunked upload service splits a large file into fixed-size pieces and transfers them […]
System Design
System Design
Low Level Design: File Upload Service
What Is a File Upload Service? A file upload service provides a reliable, scalable mechanism for clients to transfer files
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Low Level Design: Digest Email Service
What Is a Digest Email Service? A Digest Email Service batches individual notification events that would otherwise generate separate emails
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Low Level Design: Do-Not-Disturb Service
What Is a Do-Not-Disturb Service? A Do-Not-Disturb (DND) Service suppresses or delays outbound notifications during time windows that a user
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Low Level Design: Geospatial Index Service
What Is a Geospatial Index Service? A Geospatial Index Service stores, indexes, and queries geographic coordinates at scale. It powers
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Low Level Design: Identity Service
What Is an Identity Service? An Identity Service handles authentication and authorization: it answers the questions “who are you?” (authn)
System Design
Low Level Design: Distributed Semaphore Service
What Is a Distributed Semaphore? A distributed semaphore limits the number of concurrent processes that can access a shared resource
System Design
Low Level Design: Distributed Lock Service
What Is a Distributed Lock Service? A distributed lock service allows multiple processes or nodes across a network to coordinate
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Low Level Design: On-Call Management Service
What Is an On-Call Management Service? An on-call management service determines which engineer is responsible for responding to an alert
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Low Level Design: Metrics Aggregation Service
What Is a Metrics Aggregation Service? A metrics aggregation service collects raw telemetry data (counters, gauges, histograms) emitted by application
System Design
Low Level Design: Social Graph Service
What Is a Social Graph Service? A social graph service models relationships between users on a platform. These relationships can
System Design
Low Level Design: Write-Through Cache
What Is Write-Through Cache? Write-through caching is a strategy where every write to the cache is synchronously propagated to the
System Design
Low Level Design: ETL Service
What Is an ETL Service? Extract, Transform, Load (ETL) is the classic pattern for moving data from operational systems into
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Low Level Design: Billing System
What Is a Billing System? A billing system manages the full revenue lifecycle: creating subscription plans, tracking usage, generating invoices,
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Low Level Design: Content-Based Filtering Service
What Is Content-Based Filtering? Content-based filtering recommends items similar to those a user has already engaged with, based on the