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.
5/22/2020
Reading time:N/A min
Amazon Keyspaces for Apache Cassandra pricing - Amazon Web Services
by John Doe
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.
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