Case studies / cadence
Cadence — ledger rewrite
11
zero-downtime cutovers
11 cutovers0 downtime4× throughput
Problem
A decade-old PHP ledger core was the single point of failure behind every product launch. Reconciliation drift required a nightly manual fix.
Intervention
A strangler-fig migration to Rust, run alongside the legacy core with a shadow-write reconciliation harness until parity was proven for eleven consecutive cutovers.
Outcome
Zero downtime across eleven cutovers, four times the throughput on identical hardware, and zero reconciliation drift events since go-live.
11zero-downtime cutovers
4×throughput vs legacy
0reconciliation drift events
planner topology
throughput / depot
0
reconciliation drift events
"We handed over a rescue project and got back a system our own team could actually run."
CFCadence FinancialVP Product
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