AWS Certified Data Analytics Specialty 2021 - Hands-On! - Amazon Elastic MapReduce (EMR), Amazon Web Services (AWS) Inte

The video tutorial explains how Amazon EMR integrates with various AWS services like EC2, VPC, S3, CloudWatch, and IAM. It covers storage options such as HDFS, EMRFS, and local storage, highlighting the benefits and limitations of each. The tutorial also discusses the importance of data consistency in S3 and the improvements made in 2021. Additionally, it touches on monitoring and security aspects using CloudWatch and IAM, and the use of transient clusters in data pipelines.

Which AWS service is used to configure permissions on EMR?

• Amazon VPC

• AWS IAM

• Amazon CloudWatch

• AWS Data Pipeline

What is a key characteristic of HDFS storage in EMR?

• It is ephemeral and data is lost after cluster shutdown.

• It automatically scales with data size.

• It uses Amazon S3 for storage.

• It is persistent after cluster termination.

How does EMRFS enhance data storage in EMR?

• By allowing S3 to be accessed as if it were HDFS.

• By using local file systems for persistent storage.

• By providing automatic data replication across clusters.

• By integrating with Amazon CloudWatch for monitoring.

What was a previous issue with EMRFS that has been resolved?

• Consistency issues with multiple nodes writing to S3.

• Inability to use S3 for data storage.

• Lack of integration with Amazon CloudWatch.

• Limited support for large-scale applications.

What is a limitation of using local file systems in EMR?

• They are ephemeral and not backed up.

• They provide persistent storage.

• They are suitable for long-term data storage.

• They automatically expand with data size.

What happens if an EBS volume is manually detached while EMR is running?

• The cluster will terminate.

• EMR will treat it as a failure and replace it.

• Data will be permanently lost.

• The volume will automatically reattach.

Which storage option in EMR is suitable for temporary data?

• Amazon S3

• Elastic Block Store (EBS)

• EMRFS

• Local file systems