About Read Requests 21 Planning a Cassandra Cluster Deployment 22 Selecting Hardware 22 Memory 22 CPU 22 Disk 23 Network 23 Planning an Amazon EC2 Cluster 23 Capacity Planning 24 Calculating Usable Secondary Indexes 53 Building and Using Secondary Indexes 53 Planning Your Data Model 54 Start with Queries 54 Denormalize to Optimize 54 Planning for Concurrent Writes 54 Using Natural or Surrogate Row this section are not intended for production installations, just for a quick start tutorial. See Planning a Cassandra Cluster Deployment, Installing and Initializing a Cassandra Cluster, and Configuring