Event Sourcing

📖 Bản tiếng Việt (Vietnamese Edition) Series Navigation: This is Part 3 of the Core Banking Systems Architecture Masterclass. For the complete architectural curriculum, start at the Master Overview Guide. Event Sourcing & CQRS: Immutable Ledger for Microservices Answer-first: Event Sourcing and CQRS (Command Query Responsibility Segregation) solve the fundamental tension in core banking between write-side audit immutability and read-side low-latency queries. By treating an append-only event log as the authoritative System of Record (SoR) and deriving balance read models asynchronously via transactional outbox Change Data Capture (CDC), financial platforms eliminate dual-write hazards, maintain mathematical auditability, and deliver sub-millisecond account balance lookups under massive concurrent workloads. ...

📖 Bản tiếng Việt (Vietnamese Edition) Prerequisite: Read Part 3: ACID Transactions & Concurrency for database isolation mechanics. Banking Microservices Architecture: Event Sourcing & Saga Answer-first: Modernizing legacy core banking monoliths requires transitioning to event-driven microservices governed by Event Sourcing, CQRS, and Orchestrated Sagas. Recording every balance mutation as an immutable domain event enables independent horizontal scaling, temporal auditability, and sub-millisecond query responses across decoupled banking domains while eliminating blocking Two-Phase Commit (2PC) bottlenecks. ...

📖 Bản tiếng Việt (Vietnamese Edition) Core Banking Systems Architecture Masterclass Guide Answer-first: Modern cloud-native core banking architecture replaces brittle mainframe monoliths with decoupled, distributed primitives: deterministic append-only double-entry ledgers, multi-region distributed SQL with bounded consensus latency, event-sourced CQRS projections, orchestrated compensation Sagas, zero-allocation ISO 20022 parsing, FAPI 2.0 sender-constrained security, and real-time streaming Complex Event Processing (CEP). This masterclass delivers actionable architecture specifications, production DDL schemas, low-latency benchmarks, and zero-downtime resilience blueprints. ...