Streams read request unit: Each GetRecords API call to DynamoDB Streams is a streams read request unit. Each write occurs in the local Region as well as the replicated Regions. Replicated write request unit: When using DynamoDB global tables, your data is written automatically to multiple AWS Regions of your choice. For example, a write request of a 1 KB item requires one write request unit, a write request of a 3 KB item requires three write request units, and a transactional write request of a 3 KB item requires six write request units. A transactional write requires two write request units. For items larger than 1 KB, additional write request units are required. A standard write request unit can write an item up to 1 KB. Write request unit: API calls to write data to your table are billed in write request units. For example, a strongly consistent read request of an 8 KB item requires two read request units, an eventually consistent read of an 8 KB item requires one read request unit, and a transactional read of an 8 KB item requires four read request units. For items up to 4 KB in size, an eventually consistent read request requires one-half read request unit, and a transactional read request requires two read request units. For items larger than 4 KB, additional read request units are required. A strongly consistent read request of up to 4 KB requires one read request unit. DynamoDB read requests can be either strongly consistent, eventually consistent, or transactional. Read request unit: API calls to read data from your table are billed in read request units.
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