A SysOps Administrator needs to retrieve a file from the GLACIER storage class of Amazon...

Create an Amazon CloudWatch Events for file restoration from Amazon S3 Glacier using the GlacierJobDescrbption API and send the event to an SNS topic the administrator has subscribed to.

Create an AWS Lambda function that perform a HEAD request on the object being restored and checks the storage class of the object. Then send a notification to an SNS topic the administrator has subscribed to when the storage class changes to STANDARD.

Enable an Amazon S3 event notification for the s3: ObjectCreated : Post event that a sends notification to an SNS topic the administrator has subscribed.

Enable S3 event notification for the S3: ObjectRestore: Completed event that sends a notification to an SNS topic the Administrator has subscribed to.