The JusDB Database Engineering Blog

MySQL 8 introduced comprehensive password management — password validation policies, reuse history, expiration, and dual passwords for zero-downtime credential rotation.

Implement MySQL audit logging for SOC2, PCI-DSS, and HIPAA compliance. Covers MariaDB Audit Plugin, general query log, trigger-based auditing, and SIEM integration.

Configure PostgreSQL TLS with self-signed or CA-signed certificates. Force TLS via pg_hba.conf, set minimum TLS version, and verify server certs from clients.

mysqld_exporter exposes 300+ MySQL metrics for Prometheus. Learn to deploy it, configure essential alerting rules for connection saturation and replication lag, and build production dashboards in Grafana.

PostgreSQL's pg_stat_activity view exposes every connection's state — but understanding what 'idle in transaction' means and why it's dangerous requires knowing the full lifecycle of a PostgreSQL backend process.

MySQL transmits data in plaintext by default, exposing passwords and query results to network interception. Here's how to configure SSL/TLS for MySQL — from certificate generation to enforcing encrypted connections.

Hatchet transforms raw MongoDB JSON logs into actionable insights — surfacing slow operations, connection storms, and namespace hotspots that are impossible to spot in raw log files.

Add data quality checks to your pipeline — row count validation, schema drift detection, and anomaly alerting with Great Expectations

Implement schema change management with versioning, peer review, and automated validation for safe deployments

Build a data-driven capacity planning process using historical metrics, growth trends, and resource modeling

Design PostgreSQL HA with Patroni 4.1, a protected quorum DCS, HAProxy role checks, explicit durability choices, and rehearsed switchover and recovery.

Monitor PostgreSQL streaming replication lag, replication slots, and standby health to ensure HA readiness