Tuning the row cache in Cassandra 2.1 | DatastaxCassandra works optimally when the data you need to access is already in memory. Disks are comparatively slow, so when data needs to be read from disk, it works best when it is performed as a single sequential operation. In order to design an effective data model in Cassandra, it's good to keep these best practices in mind: Use clustering columns in your tables so that your rows are ordered on dis
https://www.datastax.com/blog/amazon-dynamodb
