- A
Manually delete binlog files from the DB instance using the 'PURGE BINARY LOGS' command.
Why wrong: Manual deletion is possible but not efficient; Aurora automatically manages binlogs based on retention.
- B
Use the 'Binary Log Export' feature to export binlogs to Amazon S3 and delete them from the cluster.
Why wrong: Exporting to S3 does not reduce storage consumption on the cluster volume immediately.
- C
Disable binary logging on the Aurora cluster by setting the binlog_format parameter to OFF.
Aurora does not require binlogs for PITR; disabling them saves storage and improves performance.
- D
Reduce the binlog retention period to 1 hour.
Why wrong: Reducing retention may not free enough storage if binlogs are large; also, binlogs are not needed for PITR in Aurora.
Quick Answer
The answer is to disable binary logging by setting the binlog_format parameter to OFF. This is the most efficient way to reduce binlog storage in Aurora MySQL without losing PITR because Aurora does not rely on binary logs for point-in-time recovery; instead, it uses its own storage-based recovery engine that tracks changes at the cluster volume level. On the AWS Certified Database Specialty DBS-C01 exam, this question tests your understanding of Aurora’s architecture versus standard MySQL—a common trap is assuming binlogs are essential for PITR, when in fact they are optional and can be safely turned off to save significant storage and I/O. Remember the key distinction: Aurora’s PITR is built into the storage layer, not the binlog. A useful memory tip is “Aurora doesn’t need logs for recovery—it uses its own storage sorcery.”
DBS-C01 Management and Operations Practice Question
This DBS-C01 practice question tests your understanding of management and operations. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A company is using Amazon Aurora MySQL-Compatible Edition. The database administrator notices that the Aurora cluster has a high number of binary log (binlog) files in the cluster volume, consuming significant storage. The binlog retention period is set to 24 hours. What is the most efficient way to reduce the storage consumed by binlog files without compromising point-in-time recovery (PITR)?
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
Disable binary logging on the Aurora cluster by setting the binlog_format parameter to OFF.
Option D is correct because Aurora MySQL does not rely on binlogs for PITR; it uses its own storage-based recovery. Disabling binlog altogether saves storage and reduces I/O. Option A is incorrect because reducing the retention period may not be sufficient if binlogs are still accumulating. Option B is incorrect because binlog files are not stored on the DB instance but in the cluster volume; deleting them manually is not recommended. Option C is incorrect because using the Binary Log Export feature is for exporting logs, not reducing storage.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Manually delete binlog files from the DB instance using the 'PURGE BINARY LOGS' command.
Why it's wrong here
Manual deletion is possible but not efficient; Aurora automatically manages binlogs based on retention.
- ✗
Use the 'Binary Log Export' feature to export binlogs to Amazon S3 and delete them from the cluster.
Why it's wrong here
Exporting to S3 does not reduce storage consumption on the cluster volume immediately.
- ✓
Disable binary logging on the Aurora cluster by setting the binlog_format parameter to OFF.
Why this is correct
Aurora does not require binlogs for PITR; disabling them saves storage and improves performance.
Related concept
Static NAT maps one inside address to one outside address.
- ✗
Reduce the binlog retention period to 1 hour.
Why it's wrong here
Reducing retention may not free enough storage if binlogs are large; also, binlogs are not needed for PITR in Aurora.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
- Static NAT maps one inside address to one outside address.
- PAT allows many inside hosts to share one public address using ports.
- Inside local and inside global describe the private and translated addresses.
- NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
- Identify inside and outside interfaces first.
- Check whether the scenario needs static NAT, dynamic NAT or PAT.
- Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
How this comes up in practice
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Got this wrong? Here's your next step.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related DBS-C01 NAT questions on configuration and troubleshooting.
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Management and Operations — study guide chapter
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FAQ
Questions learners often ask
What does this DBS-C01 question test?
Management and Operations — This question tests Management and Operations — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Disable binary logging on the Aurora cluster by setting the binlog_format parameter to OFF. — Option D is correct because Aurora MySQL does not rely on binlogs for PITR; it uses its own storage-based recovery. Disabling binlog altogether saves storage and reduces I/O. Option A is incorrect because reducing the retention period may not be sufficient if binlogs are still accumulating. Option B is incorrect because binlog files are not stored on the DB instance but in the cluster volume; deleting them manually is not recommended. Option C is incorrect because using the Binary Log Export feature is for exporting logs, not reducing storage.
What should I do if I get this DBS-C01 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related DBS-C01 NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Last reviewed: Jun 20, 2026
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.
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