The JusDB Database Engineering Blog

Deploy and operate a Redis Cluster with automatic sharding and HA. Covers 6-node setup, health checks, adding master nodes, resharding, and manual failover.

A detailed comparison of Google Cloud SQL, Amazon RDS, and Azure Database for MySQL and PostgreSQL — HA architecture, failover times, connection pooling, pricing for equivalent instances, and platform-specific features.

Compare PostgreSQL backup approaches: logical dumps, physical base backups, and WAL-G incremental cloud backups. Covers PITR, restore speed, and backup verification.

Configure MySQL Group Replication (MGR) with Paxos-based consensus for fault-tolerant clustering. Covers prerequisites, bootstrap, joining nodes, and health monitoring.

Set up PgBouncer in transaction pooling mode to handle thousands of PostgreSQL connections. Configuration, monitoring with SHOW POOLS, and common pitfalls.

MongoDB 8.0 brings significant replication improvements including faster elections, durable oplog writes, and changes to write concern behavior. Here's what changed and how to take advantage of it.

Enable MySQL semi-synchronous replication to prevent data loss during failover. Configure AFTER_SYNC wait point, tune timeouts, and monitor semi-sync status.

PostgreSQL offers multiple index types for different access patterns — and choosing wrong means slow queries or wasted space. A comprehensive guide to indexing strategy, from type selection to monitoring and maintenance.

Configure PostgreSQL logical replication for selective table sync and zero-downtime major version upgrades. Covers publications, subscriptions, and replication slot monitoring.

MariaDB and MySQL have diverged significantly. This guide compares licensing, Galera vs Group Replication, thread pool, cloud support, and migration paths.

Systematically diagnose MySQL replication lag: single-threaded applier, large transactions, missing replica indexes. Enable parallel replication and use pt-heartbeat.

TiDB 8.0 is the most production-ready version of the distributed SQL database yet. With improved HTAP, stronger MySQL compatibility, and Resource Groups, it's compelling for teams outgrowing single-node MySQL.