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Distributed Kanban Board
A real-time collaborative Kanban with C++ primary-backup replication and vector-clock conflict resolution.
Overview
Final project for CS6650 Building Scalable Distributed Systems at Northeastern. A C++ backend holds board state with primary-backup replication over a custom TCP binary protocol. The hot standby promotes on a 5-second heartbeat, and a rejoining master receives a full state transfer. Express and Socket.io sit in front as the gateway to a React client.
Key Achievements
Hot standby promotes on a 5-second heartbeat, and a full state transfer restores the rejoining master
Vector clocks with last-write-wins resolve concurrent edits across clients
p90 held under 200ms and p99 under 500ms at 50 concurrent tasks
Tech Stack
C++11TCPVector ClocksPrimary-Backup ReplicationExpressSocket.ioReactDistributed Systems