2V0-21.23 Question 328
Select 3A VMware administrator notices that a virtual machine's performance has degraded significantly over time. Upon investigation, they discover that the virtual machine has multiple snapshots, some of which are weeks old. What are the potential performance impacts caused by maintaining these snapshots?
- A
Increased storage consumption due to the accumulation of delta files.
- B
Reduced read and write performance as the snapshot chain grows.
- C
Improved virtual machine CPU performance due to snapshot caching mechanisms.
- D
Increased management complexity when performing operations like backups or migrations.
- E
Faster disk read speeds as older snapshots offload I/O operations.
Show answer and explanation
Correct answers: A, B, D
Explanation
Maintaining snapshots for an extended period can negatively impact virtual machine performance and operational efficiency. Snapshots consume additional storage space as delta files grow and introduce overhead for read and write operations, especially with longer snapshot chains. They can also complicate management tasks like backups and migrations. Best practices recommend using snapshots sparingly and deleting them promptly after completing the related task.
- A. Correct.
Snapshots store changes in delta files, which grow over time, consuming more storage and potentially leading to datastore capacity issues.
- B. Correct.
As the snapshot chain grows longer, read and write operations must traverse multiple layers, leading to degraded performance.
- C. Incorrect.
Snapshots do not improve CPU performance; in fact, they can increase resource usage as the system manages the snapshot chain.
- D. Correct.
Snapshots increase operational complexity because operations like backups or migrations must account for the entire snapshot hierarchy, which can lead to delays or even failures.
- E. Incorrect.
Snapshots do not offload I/O operations to older snapshots. Instead, they introduce additional overhead, leading to slower disk performance.