IBM XIV Storage System Technical Solutions V4 - C4090-456

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IBM C4090-456 Exam Syllabus Topics:

IBM XIV Storage System Technical Solutions V4 Sample Questions:

1. When creating a thin provisioned volume on an XIV the maximum capacity is limited by:

A) the softcapacityof the storage pool where the volume resides
B) the availablecapacityin the XIV system
C) the vol_size_max configuration parameter
D) the hard capacity of the storage pool where the volume resides

2. When does XIV Gen3 SSD caching significantly improve performance?

A) for large block, sequential read I/O workloads
B) for small block, random read I/O workloads
C) for GPES random workloads
D) for small block, sequential write I/O workloads

3. A customer complains that their SAP database now performs worse than it did before being migrated from traditional RAID storage to XIV. The database was configured using 20 x 200GB XIV LUNs presented to an AIX 6 host OS where they are concatenated and striped into six volumes for the databases and logs. No changes have been made in the transition to XIV.
What if anything can be done to improve performance?

A) the SAP volumes should be put into a QoS Performance Class
B) implement static load balancing and increase the queue depth of the host adapters
C) the databases should be reorganized into larger volumes on the XIV and not striped within the OS
D) add Fibre Channel adapters to the host and balance volumes across the adapters

4. A customer has requested a highly available solution with fully concurrent fail over for a VMware farm of hosts. The customer also has Oracle databases that demand very low latency (0.5 ms and lower). What would be the best solution for this environment?

A) SVC with XIV and IBM FlashSystems (RamSan), plus enable Easy Tier
B) SVC stretch clusterwith XIV and IBM FlashSystems (RamSan), plus enable EasyTier
C) Two XIV systems setup in synchronous mirrorwith SSD5 and VMware SRM
D) Two XIV systems setup in asynchronous mirror with SSDs and VMware SRM

5. How does IBM XIV SSD technology provide longer life over competitors' use of SSD technology?

A) IBM SSDs are filled with write blocks of 1024kb in random I/O operations
B) patented wear-leveling algorithm designed for SSD longevity
C) hybrid algorithms combine features of SSDswith existing HDDsin the same unit
D) common off-the-shelf components minimize the use of SSDs for write environments

Solutions: