DBS-C01 Monitoring and Troubleshooting Practice Question
A company uses Amazon Redshift for data warehousing. A nightly ETL job fails with 'Disk full' error on some nodes. The cluster has 8 dc2.large nodes. Which action will MOST efficiently resolve the issue without increasing costs?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Run a VACUUM command to reclaim space
Running a VACUUM command on Amazon Redshift reclaims storage space from deleted or updated rows without incurring additional costs. Option A is wrong because increasing the number of slices per node is not possible with dc2.large nodes; slice count is fixed per node type. Option B is wrong because adding more nodes would increase costs and is not the most efficient solution. Option C is wrong although enabling compression reduces storage usage over time, it requires a table redesign and does not immediately free space to resolve the immediate 'Disk full' error.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Increase the number of slices per node
Why it's wrong here
Slice count is fixed per node type.
- ✗
Add more nodes to the cluster
Why it's wrong here
Adding nodes increases cost and may not be needed.
- ✗
Enable compression on all tables
Why it's wrong here
Compression helps long-term but does not immediately free space.
- ✓
Run a VACUUM command to reclaim space
Why this is correct
VACUUM removes deleted rows and frees disk space.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This DBS-C01 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the DBS-C01 exam.