From the course: AWS Certified Developer - Associate (DVA-C02) Cert Prep

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Amazon DynamoDB RCU and WCU calculation

Amazon DynamoDB RCU and WCU calculation - Amazon Web Services (AWS) Tutorial

From the course: AWS Certified Developer - Associate (DVA-C02) Cert Prep

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Amazon DynamoDB RCU and WCU calculation

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- [Instructor] Now let's talk about how you can calculate the required provision Read and Write Capacity Unit for your DynamoDB table. Let's start with the Read Capacity Unit. A Read Capacity Unit can support up to one strongly consistent read request per second for an item up to four kilobytes. This is also equivalent to two eventually consistent read request per second of up to four kilobyte items. For transactional read requests, it's going to cost you two RCUs to read an item up to four kilobytes in size. For reads on items greater than 4KB, the total number of reads required is equal to the total size divided by 4KB rounded up. Now let's go to the Write Capacity Units. It's easier to remember the rules for the Write Capacity Units. So a single Write Capacity Unit can support up to one standard write request per second for an item up to one kilobyte. As for transactional writes, you need two Write Capacity Units…

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