The 8:40 AM phone call: recovering a Galera Cluster when nodes fall one after another
A Galera 3-node cluster loses quorum during a live incident. Diagnosis, emergency bootstrap, and recovery procedure guided over the phone — with the runbook.
High-Availability
4 tagged articles
MySQL
Oracle
Oracle from On-Premises to Cloud: Strategy, Planning and Cutover
Oracle 19c on-premises to OCI migration: 2 TB with RAC and Data Guard. BYOL licensing, Data Pump, overnight cutover — real chronicle.
MySQL
Galera Cluster with 3 nodes: how I solved a MySQL availability issue
3-node MySQL Galera Cluster for high availability: synchronous replication, quorum, SST/IST. Full configuration against single point of failure.
Oracle
From Single Instance to Data Guard: The Day the CEO Understood DR
Oracle Data Guard 19c: migration from single instance after a 6-hour outage. DR architecture, primary/standby, automatic switchover.