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R + W > RF → strong consistency. Lower → trade for latency/availability.
What you're seeing
Tunable consistency per query. R+W>RF means read and write quorums overlap — read sees latest write. LOCAL_QUORUM = quorum within local DC (typical for multi-DC). EACH_QUORUM = quorum in every DC.
Most workloads: RF=3 with QUORUM+QUORUM. Telemetry: ONE+ONE for max throughput.
★ KEY TAKEAWAY
R + W > RF → strong consistency. RF=3 + QUORUM both ways = standard production setting.
▶ WHAT TO TRY
- Pick W and R consistency levels.
- Green box appears when R+W>RF (strong); red when not.