Big Data Technology & Architecture

Jun 19, 2019 · Big Data

Understanding Spark Structured Streaming StateStore: Architecture, Operations, and Fault Recovery

This article explains the design and implementation of Spark Structured Streaming's StateStore module, covering its distributed architecture, state sharding, versioning, batch read/write, migration, update/query APIs, maintenance compaction, and fault‑tolerance mechanisms that enable incremental continuous queries with exactly‑once guarantees.