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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 ...

Before configuring MySQL master-slave replication, ensure both servers run the same MySQL version and have compatible system configurations. Configure the Master Server Edit the MySQL configuration file /etc/my.cnf on the master node: [mysqld] log-bin=mysql-bin server-id=101 log-bin enables binary logging, required for replication. server-id ...

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 ...

MySQL Selective Replication It is strongly advised against using the parameters mentioned in this article for selective replication in MySQL environments. This document serves only as a testing reference and is not recommended for production use. Test Environment: MySQL 5.7.26, Note: MySQL 5.6 behavior may differ! Note: All conclusions below re ...

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 ...