The JusDB Database Engineering Blog

Build a production database DR runbook covering RTO/RPO definitions, failover steps, PITR recovery commands, and a verification checklist. Test it quarterly.

Design multi-region database topologies for global latency and DR. Compares active-passive, Aurora Global Database replication, and application-level read routing patterns.

Upgrade PostgreSQL major versions with sub-second downtime using logical replication. Step-by-step guide covering schema copy, subscription setup, lag monitoring, and sequence resync.

Aerospike 7.0 delivers 1 million writes per second with sub-millisecond latency using its Hybrid Memory Storage architecture. Learn when Aerospike beats Redis and Cassandra, and how to configure it for production.

Logical replication in PostgreSQL has a critical gap: slots do not survive failover. PostgreSQL 17 finally fixes this with failover slots, plus adds row and column filtering for selective replication.

MySQL Group Replication and Galera Cluster both promise multi-primary high availability, but they behave very differently under load, network partitions, and node failures.

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.

Choose PostgreSQL backup and recovery methods from explicit RTO and RPO, preserve continuous WAL, verify manifests, and rehearse isolated restores.

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

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.