Did you use EMR?
💡 Model Answer
Amazon EMR (Elastic MapReduce) is a managed cluster platform that simplifies running big‑data frameworks such as Hadoop, Spark, Hive, and Presto on AWS. It provisions EC2 instances, installs the chosen software stack, and handles cluster lifecycle management, scaling, and security. You use EMR when you need to process large volumes of data quickly, perform batch analytics, or run machine‑learning pipelines that benefit from distributed computing. Key benefits include pay‑as‑you‑go pricing, integration with S3 for durable storage, and the ability to mix instance types for cost optimization. Typical use cases are ETL jobs, log processing, data lake analytics, and training Spark MLlib models. EMR also supports custom AMIs, allowing you to pre‑install libraries or configure security settings. In practice, you spin up a cluster, submit your job (e.g., a Spark script), monitor progress via the console or CloudWatch, and terminate the cluster when finished to avoid idle charges.
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