Cassandra is more close to AP whereas MySQL with clustering is more like CP. So they serve different purpose. See this nice discussion on Stackoverflow: https:/

Cassandra is more close to AP whereas MySQL with clustering is more like CP. So they serve different purpose. See this nice discussion on Stackoverflow: https://stackoverflow.com/questions/36404765/why-isnt-rdbms-partition-tolerant-in-cap-theorem-and-why-is-it-available https://stackoverflow.com/questions/36404765/why-isnt-rdbms-... > Also, whether you need a highly available database for a company like yelp is an implementation detail. You surely know better than them what they need, that's impressive.