ACID Transactions & Isolation Levels in Core Banking
Answer-first: Enforcing ACID isolation levels in core banking prevents lost updates and dirty reads during high-concurrency transfers. Using PostgreSQL REPEATABLE READ or pessimistic row locking (SELECT FOR UPDATE) combined with Go connection pooling guarantees transactional integrity. Spanner and CockroachDB provide linearizable distributed ACID transactions across microservices using Paxos consensus and Hybrid Logical Clocks. Prerequisite: Part 2: CASA & Lending Domain Logic on transaction parameters. The Core Problem: Concurrency Answer-first: High-concurrency banking transfers risking race conditions and lost updates require strict database lock isolation to protect ledger state. ...