nerdexam
Network_Appliance

NS0-158 · Question #92

A customer has a 4-node cluster. Two nodes have FlashCache and the other two nodes have Flash Pools. The customer is interested in deploying and OLTP application with a workload that consists of an…

The correct answer is A. Place all volumes for the application on the nodes with Flash Pools. For an OLTP application with extreme small random writes, placing volumes on nodes with Flash Pools improves performance due to their write caching capabilities.

Performance, Troubleshooting, and Security

Question

A customer has a 4-node cluster. Two nodes have FlashCache and the other two nodes have Flash Pools. The customer is interested in deploying and OLTP application with a workload that consists of an extreme number of small random writes on four LUNs spread across four volumes. What should the customer do to improve performance for the OLTP application?

Options

  • APlace all volumes for the application on the nodes with Flash Pools.
  • BDeploy all volumes for the application on the two nodes with the FlashCache installed.
  • CSplit the volumes between the two nodes with FlashCache and two of the nodes with Flash Pools.
  • DPlace the volume with the highest read load on the Flash Pool nodes and place the other volumes

How the community answered

(18 responses)
  • A
    83% (15)
  • C
    11% (2)
  • D
    6% (1)

Why each option

For an OLTP application with extreme small random writes, placing volumes on nodes with Flash Pools improves performance due to their write caching capabilities.

APlace all volumes for the application on the nodes with Flash Pools.Correct

Flash Pools integrate SSDs into an aggregate to serve as a cache for both reads and writes, making them highly effective for workloads with intense small random write operations typical of OLTP applications.

BDeploy all volumes for the application on the two nodes with the FlashCache installed.

FlashCache primarily acts as a read cache and offers limited benefit for workloads dominated by small random writes.

CSplit the volumes between the two nodes with FlashCache and two of the nodes with Flash Pools.

Splitting volumes would not fully leverage the write caching benefits of Flash Pools for the entire application workload, potentially leading to suboptimal performance for volumes on FlashCache nodes.

DPlace the volume with the highest read load on the Flash Pool nodes and place the other volumes

While Flash Pools are good for reads, the problem emphasizes 'extreme number of small random writes', making write acceleration the primary performance concern, which Flash Pools excel at.

Concept tested: NetApp FlashCache vs. Flash Pools for OLTP

Source: https://docs.netapp.com/us-en/ontap/performance/flash-technologies-comparison.html

Topics

#FlashPool#FlashCache#performance optimization#OLTP workload

Community Discussion

No community discussion yet for this question.

Sign up to join the discussion
Full NS0-158 Practice