6 min read A file storage system (like Dropbox or Google Drive) stores user files, provides sync across devices, and handles concurrent edits. […] Read article
6 min read Real-time server-to-client communication requires the server to push data without waiting for a client request. Three primary patterns exist: long […] Read article
6 min read Data archival is the systematic movement of infrequently accessed data from primary storage to cheaper, slower storage while maintaining the […] Read article
7 min read Deleting data is irreversible by default. Soft delete marks records as deleted without removing them from the database; hard delete […] Read article
6 min read CRDTs (Conflict-Free Replicated Data Types) are data structures that can be updated independently and concurrently on multiple nodes without coordination, […] Read article
4 min read Multi-Version Concurrency Control (MVCC) is the concurrency mechanism used by PostgreSQL, MySQL InnoDB, Oracle, and most modern databases to enable […] Read article
6 min read Full-text search finds documents matching natural language queries across large corpora. Unlike exact-match database queries (WHERE name = ‘foo’), full-text […] Read article
5 min read An audit log records a tamper-evident, chronologically ordered history of all significant actions in a system: who did what, when, […] Read article
4 min read Search relevance ranking determines the order in which results are presented for a given query. Poor ranking makes a search […] Read article
5 min read A booking system manages time-bounded reservations for finite resources: hotel rooms, airline seats, restaurant tables, or appointment slots. The core […] Read article