HA & DR

RAC, Data Guard, RMAN, failover & recovery

• RAC Node Eviction: A Troubleshooting Checklist That Starts With "Why" Jun 7, 2026
  Oracle RAC node eviction explained from the logs up: the three heartbeats, misscount vs disktimeout, split-brain and voting disks, rebootless restart — and a checklist to find the real cause (interconnect, storage, or a starved node) and stop it recurring.
• The Oracle HA Decision Tree: RAC vs Data Guard vs Both May 30, 2026
  RAC survives node failure; Data Guard survives site loss and corruption; only backups survive a bad DELETE. A practical RAC-vs-Data-Guard decision framework with RTO/RPO, MAA tiers, switchover/failover, and a free lab.

← All posts