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Roles and Functions Role Function canal-server Listens to the source database and captures data changes. canal-adapter Subscribes to canal-server and writes data to the target database. Deploying canal-server For detailed steps on deploying canal-server in a Kubernetes cluster, refer to official documentation. A new instance must be ...

Configuring permissions for Alibaba Canal involves standard replication grants, specifically REPLICATION SLAVE and REPLICATION CLIENT. However, the requirement for the SELECT privilege often leads to confusion regarding its necessary scope—whether it must be applied at the database level or if table-level access suffices. Initial testing in loc ...

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 ...