CompTIA
SG0-001 · Question #549
SG0-001 Question #549: Real Exam Question with Answer & Explanation
The correct answer is C. Move the application to SSD. E. Move the application to short stroke FC drives.. To improve performance for an I/O intensive application bottlenecked by high disk utilization, options that significantly increase disk speed or I/O throughput are necessary.
Storage Implementation
Question
The disk drives supporting an I/O intensive mission critical application are continuously 80 percent utilized and spike up to 100 percent throughout the business day. Which of the following options can improve the application performance? (Select TWO).
Options
- AUse higher speed server HBAs.
- BUse dedicated SATA drives.
- CMove the application to SSD.
- DAdd additional HBAs to the host.
- EMove the application to short stroke FC drives.
Explanation
To improve performance for an I/O intensive application bottlenecked by high disk utilization, options that significantly increase disk speed or I/O throughput are necessary.
Common mistakes.
- A. Higher speed server HBAs might improve bandwidth between the server and storage array, but they will not resolve a performance bottleneck that exists at the physical disk level if the disks themselves are the limiting factor.
- B. Using dedicated SATA drives does not inherently offer higher performance than other drive types and are generally slower in I/O intensive scenarios compared to enterprise-grade FC or SAS drives, or SSDs.
- D. Adding additional HBAs to the host increases the number of I/O paths and potential bandwidth capacity, but it will not improve performance if the physical disks are already saturated and operating at 100 percent utilization.
Concept tested. Storage performance optimization methods
Reference. https://learn.microsoft.com/en-us/azure/virtual-machines/disks-types
Topics
#storage performance#SSD#Fibre Channel drives#I/O intensive applications#performance tuning
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