How can I use DynamoDB’s free tier effectively to meet the need of the application?

In the context of AWS, here are the appropriate approach given:-

Understanding DynamoDB’s free tier

It can offer a free tier that would include 25 GB of storage, 25 read capacity units, and 25 write capacity units per month. It is very crucial to understand these limits and plan your data storage and access patterns accordingly.

Capacity modes

It can offer two capacity modes: on-demand and provisioned. For applications under the free tier, it is recommended to start with the on-demand mode as it automatically scales your tables based on the real traffic and usage patterns without the need for provisioning capacity.

Data modeling strategies

You can design your data model to optimize storage usage and access patterns while staying within the free tier limit. You can use the partition keys effectively to distribute data evenly across the partition and avoid hot partition which can lead to throttling.

Here is an example given below of how you can create a DynamoDB table by using the AWS SDK for Java programming language and specifying the on-demand capacity mode:-

Import com.amazonaws.services.dynamodbv2.AmazonDynamoDB;
Import com.amazonaws.services.dynamodbv2.AmazonDynamoDBClientBuilder;
Import com.amazonaws.services.dynamodbv2.document.DynamoDB;
Import com.amazonaws.services.dynamodbv2.document.Table;
Import com.amazonaws.services.dynamodbv2.document.spec.CreateTableSpec;
Import com.amazonaws.services.dynamodbv2.model.ProvisionedThroughput;

Public class DynamoDBFreeTierExample {
    Public static void main(String[] args) {
        AmazonDynamoDB client = AmazonDynamoDBClientBuilder.standard().build();
        DynamoDB dynamoDB = new DynamoDB(client);
        CreateTableSpec spec = new CreateTableSpec()
            .withTableName(“MyFreeTierTable”)
            .withAttributeDefinitions(new AttributeDefinition(“Id”, “N”))
            .withKeySchema(new KeySchemaElement(“Id”, KeyType.HASH))
            .withProvisionedThroughput(new ProvisionedThroughput(1L, 1L)); // Provisioned throughput for on-demand mode
        Table table = dynamoDB.createTable(spec);
        System.out.println(“Table created: “ + table.getDescription().getTableStatus());
    }
}