Active-Active — all nodes handle traffic. Active-Passive — one node active.
Active-Active Clustering:
Active-Active:
[Node 1] ← Traffic
[Node 2] ← Traffic
(All active, load balanced)
Active-Passive Clustering:
Active-Passive:
[Node 1] ← Traffic (active)
[Node 2] (standby)
(One active, others standby)
Key differences: