Amazon Keyspaces (for Apache Cassandra) pricing

Read and write throughput – Amazon Web Services China (Beijing) Region, operated by Sinnet and Amazon Web Services China (Ningxia) Region, operated by NWCD

On-demand capacity mode

Provisioned capacity mode

Read and write consistency

Metering and regional pricing

• On-demand capacity mode

  With on-demand capacity mode, reads are metered using read request units (RRUs) and writes are metered using write request units (WRUs). Each RRU provides enough capacity to read up to 4 KB of data with LOCAL_QUORUM consistency. If you use LOCAL_ONE consistency, you are only billed one half of an RRU for the read. Each WRU provides enough capacity to write up to 1 KB of data per row with LOCAL_QUORUM consistency. For example, to write a row with 3 KB of data requires 3 WRUs. To read a row with 10 KB of data requires 3 RRUs using LOCAL_QUORUM consistency or 1.5 RRUs using LOCAL_ONE consistency. If a query returns multiple rows, you are billed based on the aggregate size of the data returned. For example, if your query returns four rows and each row has 2 KB of data (8 KB of data total), you are billed 2 RRUs using LOCAL_QUORUM consistency and 1 RRU using LOCAL_ONE consistency. 

  On-demand capacity mode - Amazon Web Services China (Beijing) Region

  You pay a flat price for each read or write request performed:

  • Write requests: ¥ 12.9384 for every 1,000,000 write request units
  • Read requests: ¥ 2.5877 for every 1,000,000 read request units
    

  On-demand capacity mode - Amazon Web Services China (Ningxia) Region

  You pay a flat price for each read or write request performed:

  • Write requests: ¥ 12.9384 for every 1,000,000 write request units
  • Read requests: ¥ 2.5877 for every 1,000,000 read request units
    

• Provisioned capacity mode

  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 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. If a query returns multiple rows, you are billed based on the aggregate size of the data returned. For example, if your query returns four rows and each row has 2 KB of data (8 KB of data total), you are billed 2 RCUs using LOCAL_QUORUM consistency and 1 RCU using LOCAL_ONE consistency. 

  Provisioned capacity mode - Amazon Web Services China (Beijing) Region

  You pay a flat, hourly rate based on the capacity you reserve:

  • Read throughput: ¥ 0.00134 for every unit of read capacity per hour

  • Write throughput: ¥ 0.0067 for every unit of write capacity per hour
    

  Provisioned capacity mode - Amazon Web Services China (Ningxia) Region

  You pay a flat, hourly rate based on the capacity you reserve:

  • Read throughput: ¥ 0.00134 for every unit of read capacity per hour

  • Write throughput: ¥ 0.0067 for every unit of write capacity per hour