Freaks City

Scenario 1: Identical Binlog Filename with Misaligned Offsets When utilizing a Virtual IP (VIP) for high availability, if the current primary and standby nodes share the exact same binary log filename, but the recorded position on the original primary is smaller than the actual position on the newly promoted primary, Canal throws an error resem ...

Business Requirement Both the source and target schemas on the same MySQL instance contain a table named student. Any INSERT, UPDATE, or DELETE executed against source.student must be reflected in target.student with sub-second latency. Candidate Approaches 1. Shell Script Quick PoC with bash + mysqldump was abandoned because the team lacked sh ...

Scenario Overview In modern application architectures, Redis is frequently employed as a caching layer to accelerate read operations. However, a common challenge arises when underlying database records are modified: the cache must be updated accordingly. Embedding cache invalidation or update logic directly within business code often leads to t ...