Hands-On Microservices with Kubernetes

Storing your data on a local SSD

A local SSD is not as fast as memory, but it is very fast. Of course, you can always combine in-memory caching too (any respectable data store will use memory caching to its advantage). Using an SSD is appropriate when you require fast performance, but your working set doesn't fit in memory or, alternatively, you don't want to pay the premium of large memory when you can get by with a much cheaper, yet still very fast, SSD. For example, Cassandra recommends using local SSD storage as the backing store for its data.