In a database environment, the system administrator complains that high write response times are triggering frequent automated alerts. However, utilization for processor, paths, and array groups is low. Database users are not complaining.
What causing this problem?
A. The RAID level is inappropriate.
B. The storage system has too few processors.
C. The storage media devices are too slow.
D. Asynchronous destaging of writes occurs in bursts.
A VSP G1000 performance analysis shows that server response times for virtualized volumes are high, 100 ms and higher, but HDD utilization rates in an external HUS 150 never exceed 35%. There are no processor or path constraints in the configuration. The workload is steady and stable.
Which two actions will optimize this configuration? (Choose two.)
A. Increase the external path LUN queue depth in the VSP G1000.
B. Spread the server load across more and smaller LUNS per RAID group in the HUS.
C. Break up each HUS LUN into several smaller volumes in the VSP G1000.
D. Migrate the HUS LUNs to RAID groups with faster HDDs.
How does the HDLM Extended Round Robin algorithm impact sequential I/O?
A. It continues to use the same path for a user-specified count of sequential I/O requests.
B. It remembers a user-determined number of addresses to better implement sequence detection for the storage.
C. It buffers and reorders I/O requests to improve sequence detection by the storage.
D. It makes a path decision for every I/O request.
DP-Vol LUNs are taken from an HDP pool deployed with 128 disks (16x4D+4D RAID groups). Access is random read.
Which combination of FC paths, LUN Queue Depth, and number of DP-Vols will result in a per-disk queue of 4 within this pool?
A. 2 paths, a LUN Queue Depth of 16, and 32 DP-Vols
B. 2 paths, a LUN Queue Depth of 8, and 32 DP-Vols
C. 4 paths, a LUN Queue Depth of 8, and 32 DP-Vols
D. 4 paths, a LUN Queue Depth of 16, and 32 DP-Vols
A large bank is completing a capacity planning exercise and wants to upgrade their current VSP G1000 to properly support their online banking application for the next 18 months. The IT department wants to know where they should invest to achieve the transactional Service Level Objective (SLO).
In this scenario, which three recommendations would you make? (Choose three.)
A. Measure throughput of all SAN directors.
B. Export two months of Performance Monitor data.
C. Measure the storage resource utilizations.
D. Request a statement of growth requirements.
E. Measure the existing I/O profile.
You are recommending RAID 6 to a customer for a non-database HDT pool.
What are two reasons for this recommendation? (Choose two.)
A. When capacity is pooled; the whole pool is affected when one parity group fails.
B. RAID 6 provides the most efficient use of system processor resources.
C. RAID 6 minimizes exposure to double disk failure.
D. RAID 6 provides the optimum overall performance of all RAID types.
What are two benefits of placing transaction log files on RAID 1+0 disks for Microsoft SQL Server databases rather than RAID 5 disks? (Choose two.)
A. Multiple transaction log files are supported.
B. Faster recovery after disk hardware failure is realized.
C. Capacity utilization rates are improved.
D. Microsoft recommendations are followed.
You are sizing a storage system for a response-sensitive database application in a VMware environment.
Which two statements are true in this scenario? (Choose two.)
A. The cache hit percentage is determined primarily by the amount of cache provided by the storage system.
B. The peak load requirements of the database and filesystem is a key factor in determining the resources required to meet response time requirements.
C. The server virtualization will change the I/O profile of the application as viewed by the storage.
D. Sizing estimations for a database workload should be based on a steady state and then an extra 10% resources for headroom should be added.
Which three statements are true regarding a VSP G400 configuration for a Microsoft Exchange Server environment? (Choose three.)
A. RAID 1+0 is a recommended RAID level for the database volumes.
B. RAID 6 is a recommended RAID level for the database volumes.
C. HDP is a recommended configuration for database volumes.
D. Parity group concatenation is recommended.
E. Microsoft JetStress testing should be used to validate the required performance.
After moving an application to a dedicated HDP pool consisting of four array groups, RAID 6 and NL-SAS 6 TB drives, the user has noticed significantly high response times.
What information would be used to determine if the pool is configured appropriately in this scenario? (Choose two.)
A. total IOPS
B. average request size
C. array group utilization
D. percent random write ratio
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