CapitalOne Loyalty is a cloud native application processing billions of credit card transactions yearly and delighting our customers with rewards. Our platform uses Apache Cassandra as one of its key datastore. While building highly resilient systems for servicing our customer with Apache Cassandra. There are various key design decisions were made and it involves choosing right partition keys for Apache Cassandra. This talk will highlight 3 of such real world use case of choosing right partition key and how it helps us with our scale and resiliency. Those use cases are :
1. Adoption of Staging Table pattern helping us resiliency
2. Adoption of Current and History pattern helping us to service both batch and real-time use cases
3.Adoption of idempotency helping with all de-dups