With provisioned capacity mode, reads are metered using read capacity units (RCUs) and writes are metered using write capacity units (WCUs). Each RCU provides enough capacity to read up to 4 KB of data per row per second with LOCAL_QUORUM consistency. If you use LOCAL_ONE consistency, you are only billed one half of an RCU for the read. Each WCU provides enough capacity to write up to 1 KB of data per row per second with LOCAL_QUORUM consistency. For example, to write one row with 3 KB of data per second requires 3 WCUs. To read a row with 10 KB of data per second requires 3 RCUs using LOCAL_QUORUM consistency or 1.5 RCUs using LOCAL_ONE consistency.