A 10K RPM Small Form Factor 600 GB disk drive has a 3 ms average rotational latency and a 4 ms average seek time.
How many random read IOPS would you expect from a 4D+4D RAID group using these drives before any consideration for cache hits or queuing optimization benefits?
A. approximately 570 IOPS
B. approximately 1,140 IOPS
C. approximately 1,530 IOPS
D. approximately 2,280 IOPS
In a VSP G200 system, what are two advantages of RAID 1+0 compared to RAID 5/6 for random write workloads? (Choose two.)
A. RAID 1+0 provides more useable capacity per for the same number of drives.
B. RAID 1+0 has less processing overhead.
C. Disk virtualization is lower.
D. RAID 1+0 has more efficient pre-fetch operation.
Which two statements are true regarding HDP pools? (Choose two.)
A. Using the largest possible pools is a recommended practice.
B. Exposure to failure and recovery from failure must be considered when recommending the maximum size of a pool.
C. HDP pools can be used for sizing HDT pools.
D. Tier migration is based on performance and space capacity.
A customer has several Oracle databases with different workload profiles residing on old HUS systems. The customer wants to consolidate workloads on a new VSP G800 system to increase database performance and to reduce costs.
Which configuration would you use to accomplish this task?
A. Put all of the databases in a single HDT pool.
B. Put each database in its own HDT pool.
C. Put databases with the same workload profile together in their own HDT pool.
D. Put all database tablespaces and indexes in the first HDT pool, all redo logs in the second HDT pool, and all undo logs in a third HDT pool.
A VSP G800 customer has one HDT pool with three tiers and they report a high frequency of relocations up and down between Tier 1 and Tier 2, affecting the HDT pool performance.
Which two actions will help solve the issue? (Choose two.)
A. Decrease the monitoring period of the HDT pool.
B. Increase the size of the grey zone between Tier 1 and Tier 2.
C. Change the HDT pool setting from Period mode to Continuous mode.
D. Increase the size of Tier 2.
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
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.
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.
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.
For a VSP G1000 system serving a mission critical interactive workload, which two statements are true about VSD failover? (Choose two.)
A. The VSD receiving the workload of a failed VSD is not pre-determined.
B. Providing reserved capacity to accommodate failure is a requirement when planning for capacity for normal operations.
C. The workload of a failed VSD board always transfers to its redundant partner VSD board.
D. The workload of a failed VSD board is dynamically redistributed among surviving VSD boards.
