I think DynamoDB has replaced SimpleDB as the default key-value store if you're running within AWS. For example, even the official Kinesis Client Library will

I think DynamoDB has replaced SimpleDB as the default key-value store if you're running within AWS. For example, even the official Kinesis Client Library will store its state in a DynamoDB table. (link: http://docs.aws.amazon.com/kinesis/latest/dev/kinesis-record-processor-ddb.html http://docs.aws.amazon.com/kinesis/latest/dev/kinesis-record...)