The JusDB Database Engineering Blog

Production-ready MySQL Group Replication deployment guide. Learn cluster sizing, monitoring setup, performance tuning, and disaster recovery planning.

PostgreSQL 13 will officially reach end of life on November 13, 2025. After this date, the PostgreSQL Global Development Group will stop releasing security patc

Production MariaDB Galera Cluster: mariabackup-based SST, MaxScale Galera-aware routing, schema-change strategy with TOI vs RSU, and a troubleshooting playbook for the failures that actually take down production.

Understand RDS Multi-AZ for HA and Read Replicas for read scaling — failover behavior, replication lag, and costs

Compare Redis RDB snapshots and AOF logging — durability trade-offs, performance impact, and recovery scenarios

Configure Redis Cluster for horizontal scaling — hash slots, replication, failover, and client-side routing

Define meaningful SLOs and SLAs for your database tier — latency, availability, durability, and error budgets

A practical runbook for database incidents — triage, diagnosis, escalation, and post-mortem for MySQL and PostgreSQL

Set up MySQL Orchestrator for automatic failover, topology discovery, and master election at scale

Configure pgBackRest for full, differential, and WAL archiving backups with S3 storage and point-in-time recovery

Deploy Aurora Global Database for sub-second cross-region replication. Understand storage-level replication, planned failover vs unplanned, and write forwarding for read regions.

Redis Sentinel and Redis Cluster both provide HA, but teams regularly choose the wrong one. Sentinel is simpler and covers 95% of use cases; Cluster is required for horizontal scale. Here's when to choose each.