A customer has an HDP pool with four array groups and 600 GB SAS drives operating at 85% utilization. Four array groups of the same configuration were added to the pool.
In this scenario, which metric should be reviewed to validate optimal pool performance?
A. pool total IOPS
B. pool I/O profile
C. pool array group utilization
D. pool read/write ratio
You are planning for a performance upgrade for a transaction application.
Which three metrics are necessary to determine the required back-end storage configuration in this scenario? (Choose three.)
A. cache read hit ratio
B. read/write ratio
C. transfer rates
D. queue depth
E. IOPS
A customer wants to add a new flash-based tier to an existing HDT pool. You refer to the Tier properties chart to determine if the workload in a disk-based HDT pool is a good candidate for adding a new and higher flash tier.
In this scenario, what does the chart tell you?
A. The utilization line starts at a low level and gradually climbs to a high spike at the extreme right-hand side.
B. The utilization line starts at a medium level on the left side and fails away slowly.
C. The utilization line stays at a high level until half way across the chart then drops sharply.
D. The utilization line starts at a high level on the left side then drops away sharply.
Your customer has a VSP G1000 with an HDT pool with two tiers (SAS 15K and SAS 10K). The response times have increased over time to an unacceptable level. They want to add a flash tier and they ask you if this solution will be appropriate.
Which tool should you use to satisfy the requirement?
A. Hitachi Server Priority Manager
B. Hitachi Tiered Storage Manager
C. Hitachi Universal Volume Manager
D. Tier Properties Performance Graph
Which three key metrics are required for sizing applications? (Choose three.)
A. cache read hit ratios
B. IOPS
C. I/O read/write ratios
D. number of BED pairs
E. port speed
A user reports fluctuating LUN response times every day between 8:00 AM and 9:00 AM as users arrive and log in.
How do you identify this condition using Hitachi Tuning Manager?
A. View LUN response times and RAID group utilization (% busy) averaged over the 60 minutes.
B. View the random write counts every minute.
C. View LUN response times and RAID group utilization (% busy) every minute.
D. View LUN response times and correlate against the Cache Write Pending level every 15 minutes.
A mission critical SQL server application that resides in a three-tier HDT pool is showing response time spikes that may be related to I/O activity.
Which three Hitachi Tuning Manager reports would you use to determine the problem? (Choose three.)
A. IOPS by dataset.
B. IOPS by V-Vol
C. IOPS by pool
D. IOPS by tier
E. IOPS by parity group
Which two UNIX commands provide metrics about disk device I/O activity? (Choose two.)
A. perfmon
B. iogen
C. iostat
D. sar
You need to run a benchmark test to verify the performance of a new multi-user database storage implementation before loading the real data.
What are three features you will need in the benchmark/workload generator to accomplish this task? (Choose three.)
A. variation of thread count
B. variation of sequential and random access
C. variation of RAID level
D. variation of HBA queue depth
E. variation of read and write
A customer with a VSP G1000 is using HDT with SAS 15K drives and external storage. The customer wants the daytime response-sensitive workload to benefit from tiering. They also want to minimize the impact of relocations on the daytime operation itself.
In this scenario, which action will satisfy the requirements?
A. Enable monitoring only during the daytime hours (9:00 AM to 5:00 PM) and only enable relocation at other times.
B. Disable monitoring during daytime hours (9:00 AM to 5:00 PM)
C. Enable active flash so that all relocations can be completed in short bursts.
D. Use continuous mode with a 30-minute cycle time and define relocation during daytime hours (9:00 AM to 5:00 PM) with a low relocation speed.
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