Read Repair
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DS201 Exercise 14: Read Repair
- Difficulty: Beginner
- Time: 10 minutes
In this hands-on lab, you will:
- Simulate an inconsistent replica node by deleting its data files
- Force a read repair by requesting query results from all replica nodes
Consistency is the tricky challenge for distributed systems. As distributed systems trade-off consistency for performance, some of the nodes in a cluster may become inconsistent. When Cassandra notices these inconsistencies, it takes steps to resolve them. This resolution is the role of read repair.