Database Insights

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.

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.

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

PostgreSQL disaster recovery requires more than just running pg_dump — it needs WAL archiving, PITR capability, regular restore testing, and clear RTO/RPO targets. Here's how to build it.

Deploy a production PostgreSQL HA cluster with Patroni and etcd. Covers configuration, patronictl commands, HAProxy integration, and failover procedures.

Day-to-day MongoDB replica set operations: adding/removing members, triggering elections, diagnosing replication lag, and managing oplog size.

Set up PostgreSQL streaming replication from scratch. Covers primary configuration, standby base backup, replication monitoring, and manual failover promotion.

Configure MySQL Orchestrator for automated failover and replication topology management. Step-by-step guide covering installation, Raft mode, and failover testing.

TiDB uses Raft consensus protocol through TiKV to replicate every region across three or more nodes. Here's how leader election, log replication, and region management work in practice.

PostgreSQL 17 finally adds native incremental backup support — allowing subsequent backups to capture only changed blocks since the last full backup.