aws dynamodb on-demand capacity

Charges apply for reading, writing, and storing data in DynamoDB with instant scaling based on the activity (both up/down).

This is based on the reads/writes on the table, rather than specifying the read/write units during table creation.

Great for:

• Unpredictable workloads
• New applications you don't have workload plans for
• When you want to "pay for what you use"

On-demand capacity

• Unknown workloads
• Unpredictable application traffic
• Spiky, short-lived peaks
• Pay-per-use model is desired
• It may be more difficult to predict the cost

Provisioned capacity

• Read/write capacity can be easily forecasted
• Predictable application traffic
• Application traffic is consistent or increases gradually
• Gives much clearer ideas of cost