Modern hinted handoff

Hinted Handoff is an optional feature in Cassandra that stores hints locally when a write fails due to unavailable replica nodes. These hints are later replayed to the recovering node, ensuring data consistency and availability. However, hinted handoffs do not count towards ConsistencyLevel requirements and cannot satisfy all types of writes. While it helps maintain performance during failures, it is not a substitute for regular repair operations as hardware failure can still lead to inconsistencies.