DEA-C01 Question 18

Community Discussion

Written by other learners. Comments can disagree with the marked answer — check the official documentation when in doubt.

• Chose B4

  Concurrency Scaling in Amazon Redshift is a feature that automatically adds temporary clusters to handle spikes in query traffic, providing additional read and write capacity. This feature is enabled through Workload Management (WLM) at the queue level in Redshift. Each queue can be configured to use concurrency scaling for handling queries that exceed the capacity of the main cluster. Why option A is incorrect: Turn on concurrency scaling in workload management (WLM) for Redshift Serverless workgroups: This option is for Redshift Serverless rather than clusters on RA3 nodes. Serverless clusters handle scaling differently and don't require manual concurrency scaling settings like the RA3 clusters.

• 1

  B"You can manage which queries are sent to the concurrency-scaling cluster by configuring WLM queues. You're charged for concurrency-scaling clusters only for the time they're actively running queries." https://docs.aws.amazon.com/redshift/latest/dg/concurrency-scaling.html

• Chose B2

  B. According to documentation, the "concurrency scaling" is set up in workload management queue (see comment below). A. discarted, because redshift serverless scales automatically (it doesn't need enable "concurrency scaling").