A data engineer develops an AWS Glue Apache Spark ETL job to perform transformations on...

A “No space left on device” error typically results fromdata skeworlarge shuffle stages. The best actions are:

B. Monitor using Spark UI and Glue metricsto find skewed partitions or executor issues.

D. Use --write-shuffle-files-to-s3to offload intermediate data to S3 instead of local disk, andapply saltingto reduce skew.

“You can reduce the impact of data skew and large shuffle operations by monitoring with Spark UI and enabling the --write-shuffle-files-to-s3 option. Salting can help rebalance the skewed keys.”

–Ace the AWS Certified Data Engineer - Associate Certification - version 2 - apple.pdf

Scaling out workers (A, C) is more costly and less efficient if the root cause (skew) is not fixed.