Which of the Following Must Be Considered Before You Optimize

Which of the following must be considered before you optimize the performance of an N8500 clustered NAS storage system? (Select 3 answers)

A) Evaluate the feasibility of the performance target based on your experience.
B) Use a fixed testing environment for performance optimization.
C) Determine the testing mode based on services to ensure the comparability of the test results.
D) Performance optimization has no impact on ongoing services. You do not need to worry about the pressure on services.