2V0-21.23 Question 84
Select 4A company has implemented vSAN 8 using the Express Storage Architecture (ESA) to optimize performance. Which of the following features or concepts are specific to ESA in vSAN 8, and help improve storage performance and efficiency?
- A
Optimized use of NVMe storage devices
- B
Support for RAID 5 and RAID 6 erasure coding in all-flash configurations
- C
Dependency on a cache-tier/disk-tier architecture
- D
Introduction of a new log-structured file system (vSAN LFS)
- E
Use of a write buffer to enhance performance in hybrid configurations
- F
Improved data compression and encryption during write operations
Show answer and explanation
Correct answers: A, B, D, F
Explanation
The Express Storage Architecture (ESA) in vSAN 8 is designed to take full advantage of high-performance NVMe storage devices, introducing features like vSAN LFS, improved data compression and encryption, and efficient erasure coding for all-flash configurations. Unlike the Original Storage Architecture (OSA), ESA eliminates the cache-tier/disk-tier structure and focuses on enhanced performance and simplicity. Understanding these distinct features is critical for deploying and managing vSAN 8 with ESA.
- A. Correct.
Correct. ESA leverages NVMe storage devices to fully optimize high-performance hardware, which is a key improvement over the Original Storage Architecture (OSA).
- B. Correct.
Correct. ESA supports efficient RAID 5 and RAID 6 erasure coding in all-flash configurations, which enhances storage efficiency and performance.
- C. Incorrect.
Incorrect. ESA eliminates the cache-tier/disk-tier architecture, which was a hallmark of the Original Storage Architecture (OSA). Instead, ESA uses a single-tier architecture to simplify operations.
- D. Correct.
Correct. A significant feature of ESA is the introduction of the log-structured file system (vSAN LFS), designed to improve write performance and reduce overhead.
- E. Incorrect.
Incorrect. ESA is optimized for all-flash configurations and does not rely on a write buffer, which was used in hybrid configurations of the Original Storage Architecture (OSA).
- F. Correct.
Correct. ESA includes improved data compression and encryption during write operations, reducing storage footprint and enhancing security without impacting performance.