LLD - Design — Online Shopping Cart
In designing an e-commerce system, how can you ensure both high availability and data consistency for order processing?
In designing an e-commerce system, how can you ensure both high availability and data consistency for order processing?
hard📝 Trade-off Q9 of 15
Step-by-Step Solution
Solution:
Step 1: Define high availability and consistency needs
High availability means the system is always accessible; consistency means data is accurate and synchronized.Step 2: Use distributed databases with consensus
Consensus protocols like Paxos or Raft ensure replicas agree on data, providing consistency and availability.Final Answer:
Use distributed databases with consensus protocols and fallback replicas -> Option AQuick Check:
Consensus + replicas = availability + consistency [OK]
Quick Trick: Consensus protocols keep data consistent and available [OK]
Common Mistakes:
- Relying on single machine
- Accepting inconsistency
- Disabling replication
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