Which AWS service is ideal for backing up real-time streaming data?

Kinesis Firehose is the ideal service for backing up real-time streaming data. This service is specifically designed to handle large streams of data in real-time, allowing you to reliably capture streaming data, transform it if necessary, and then store it in a variety of destinations such as Amazon S3, Amazon Redshift, or Amazon Elasticsearch Service.

The ability of Kinesis Firehose to process data continuously and deliver it with minimal latency makes it particularly suited for scenarios where immediate insights from streaming data are crucial. It is capable of automatically scaling to match the throughput of incoming data, which is essential for applications that generate a continuous flow of information.

Other services listed, while useful in various contexts, do not specialize in real-time streaming data backing. Amazon S3, for example, is designed for object storage and can be a destination for the data processed by Kinesis Firehose but does not inherently manage real-time streaming data. Amazon Glacier is optimized for long-term archival storage and is not suited for real-time access. Amazon RDS is meant for relational database management and not for handling continuous streaming data. Hence, Kinesis Firehose stands out as the best option for this purpose.