Question: How does DynamoDB handle data changes?
Answer
DynamoDB handles data changes in a few different ways depending on the type of change being made.
- Put and Update operations: When you use the
Put
operation to add a new item to a table or use theUpdate
operation to modify an existing item, DynamoDB updates the item in the table. These operations are atomic, meaning they update the entire item in a single operation, and the updates are immediately visible to all users. - Delete operations: When you use the Delete operation to remove an item from a table, DynamoDB physically removes the item from the table. These operations are also atomic, meaning they remove the entire item in a single operation, and the deletes are immediately visible to all users.
- Conditional writes: DynamoDB also allows you to perform conditional writes, which only update or delete an item if certain conditions are met. For example, you can use a conditional write to only update an item if its attribute has a certain value or delete an item if it hasn't been modified in a certain amount of time.
- Versioning: DynamoDB provides a " versioning " feature that allows you to enable versioning on your table. With versioning, DynamoDB automatically keeps a history of all the versions of an item, and you can easily access the previous versions of an item.
- Eventual consistency: DynamoDB is designed with a distributed architecture, and it replicates data across multiple servers to ensure durability and availability. In some rare cases, when there is a change to an item, it may take some time for the change to propagate to all the copies of that item. This is known as "Eventual consistency, " a trade-off for high availability and scalability.
It's important to keep in mind that when you're making changes to a DynamoDB table, you should be mindful of your table's performance and capacity and ensure that your updates and deletes are properly monitored and tested.
Other Common DynamoDB FAQ (with Answers)
- How to grab data from AWS DynamoDB?
- Can DynamoDB do aggregations?
- Does DynamoDB support load balancing?
- Why is DynamoDB so expensive?
- Can I add another region to global DynamoDB?
- Will I be charged for DynamoDB is it is inactive?
- How to tell if DynamoDB initialized correctly?
- What does the DynamoDB query return?
- Does DynamoDB support read replicas?
- Who owns DynamoDB?
- Who invented DynamoDB?
- How to write complex queries for a DynamoDB table?
- How to divert the traffic from S3 to DynamoDB?
- How to access DynamoDB from Apache Hive?
- Are DynamoDB table names globally unique?
Tired of switching accounts and regions? Use Dynobase.
First 7 days are. No credit card needed.
Product Features
DynamoDB Tools
DynamoDB Info
© 2023 Dynobase