$ PostgreSQL & MySQL Master/Slave + Backup

Enterprise-grade replication, data synchronization, and automated backup infrastructure for PostgreSQL and MySQL.

→Set up separate master-slave replication topologies for both PostgreSQL and MySQL. Every write operation on the master node is propagated to slave nodes in real time. Read load is distributed across slaves, reducing pressure on the master.
→Wrote triggers to automate cross-table data synchronization. Any INSERT, UPDATE, or DELETE on one table is immediately reflected in the related tables, keeping data consistent across two different systems or services at all times.
→An automatic alerting mechanism kicks in when a slave disconnects from the master or replication lag exceeds the defined threshold — a notification is sent immediately.
→Built an automated backup pipeline through Cloudflare. Backups are Gzip-compressed and transferred to both local storage and external storage. After each backup, data integrity is verified with a SHA checksum.
→Applied a 7-day rolling retention policy. Old backups are automatically purged by Cron Jobs, preventing unnecessary storage consumption.
→An automated email report is sent after each backup run. Successful backups include a summary of size, duration, and checksum. Failures deliver a detailed log report with the root cause.
→All processes are automated via Bash scripts running on Cron. No manual intervention is required. Any step failure causes the process to terminate safely and log the error.

PostgreSQLMySQLReplicationTriggerBashCronBackupDevOpsCloudflare