Redshift Quiz

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A company currently uses Redshift in AWS. The Redshift cluster is required to be used in a cost-effective manner. As an architect, which of the following would you consider to ensure cost-effectiveness?

A. Use Spot Instances for the underlying nodes in the cluster.

B. Ensure that unnecessary manual snapshots of the cluster are deleted.

C. Ensure VPC Enhanced Routing is enabled.

D. Ensure that CloudWatch metrics are disabled.

B. Ensure that unnecessary manual snapshots of the cluster are deleted.
AWS Documentation mentions the following:
Amazon Redshift provides free storage for snapshots that is equal to the storage capacity of your cluster until you delete the cluster. After you reach the free snapshot storage limit, you are charged for any additional storage at the normal rate. Because of this, you should evaluate how many days you need to keep automated snapshots and configure their retention period accordingly, and delete any manual snapshots that you no longer need.
For more information on working with Redshift Snapshots, please visit the following URL:
Note: Redshift pricing is based on the following elements.Compute node hours Backup StorageData transfer – There is no data transfer charge for data transferred to or from Amazon Redshift and Amazon S3 within the same AWS Region. For all other data transfers into and out of Amazon Redshift, you will be billed at standard AWS data transfer rates.Data scanned There is no additional charge for using Enhanced VPC Routing. You might incur additional data transfer charges for certain operations, such as UNLOAD to Amazon S3 in a different region or COPY from Amazon EMR or SSH with public IP addresses. Enhanced VPC routing does not incur any cost but any Unload operation to a different region will incur a cost.With Enhanced VPC routing or with out it any data transfer to a different region does incur cost.But with Storage, increasing your backup retention period or taking additional snapshots increases the backup storage consumed by your data warehouse. There is no additional charge for backup storage up to 100% of your provisioned storage for an active data warehouse cluster. Any amount of storage exceeding this limit does incur cost.

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