Chapter 13 concept map
Chapter 13 Map — Streaming Philosophy at a Glance
funnel
cost
causal
replay
local
identify
split
apologize
DERIVED DATA
one record, many views
One Record
input enters once, CDC out
Order = Consensus
total order needs a leader
Causality
keep only needed order
Batch + Stream
replay, migrate gradually
Dataflow over RPC
subscribe, read locally
End-to-End IDs
UNIQUE id, dedup all hops
Time vs Integrity
temporary vs permanent
Sweet Spot
coordinate just enough
Funnel input through one record, derive everything, verify end to end — apologize only where cheap.