How can the developer accomplish this?

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In: DVA-C01
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With: 2 Comments
A developer is writing an application that runs on Amazon EC2 instances in an Auto Scaling group The application data is stored in an Amazon DynamoDB table and records are constantly updated by all instances. An instance sometimes retrieves old data. The developer wants to correct this by making sure the reads are strongly consistent.

How can the developer accomplish this?

Set ConsistentRead to true when calling GetItem.

Create a new DynamoDB Accelerator (DAX) table

Set Consistency to strong when calling UpdateTable.

Use the GetShardIterator command.

Explanations:

SettingConsistentReadtotruewhen callingGetItemensures that the read operation is strongly consistent, meaning the application will always retrieve the most up-to-date data from DynamoDB.

DynamoDB Accelerator (DAX) is a fully managed caching service that improves read performance by caching results. However, it provides eventually consistent reads by default and does not guarantee strong consistency.

TheUpdateTableoperation modifies the table’s structure, such as adding or removing indexes, but it does not control the consistency of read operations.

TheGetShardIteratorcommand is used for working with DynamoDB Streams, not for managing data consistency during reads from a DynamoDB table.

2026-04-02

2 Comments

  1. Carolyn
    Author

    I systematize that the answer is:
    Set ConsistentRead to true when calling GetItem.

  2. Bradley
    Author

    I rank that the answer is:
    Set ConsistentRead to true when calling GetItem.

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