What are Milvus consistency levels?

Milvus supports four consistency levels: Strong, which guarantees reads see all previous writes; Bounded staleness, the default, which tolerates a small delay between writes becoming visible; Session, where a client sees its own writes but not necessarily other clients' recent writes; and Eventually, which offers highest throughput by allowing any read to lag behind writes. Lower consistency levels reduce query latency because they skip synchronization with the log broker. Choose based on whether fresh data or low latency matters more for each query.