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IBM(000-968)單項選擇題每日一練(2019.03.21)

單項選擇題
A customer has one mainframe and ten open system servers in their current environment. They plan to add the servers to an IBM DS8700 system with four array sites. How many extent pools should be created to provide the best resource utilization of the DS8700（）
A.1
B.2
C.4
D.6
單項選擇題
Which of the following statement about DS8000 hard drive technology is correct（）
A.All types of the 2.5" disk drives offered by the DS8800 system have higher performance than the 3.5" disk drives supported by DS8700
B.The 2.5" disk drives included on the DS8800 support 6Gbps SAS； the 3.5" disk drives in DS8700 are 4 Gbps FC
C.The 2.5" disk drives included on the DS8800 support 8Gbps SAS； the 3.5" disk drives in DS8700 are 4 Gbps FC
D.The 2.5" 15k rpm drives offered by the DS8800 system support 6Gbps SAS-2
單項選擇題
A healthcare provider has two applications that they need to redundantly protect in a SAN environment. Their patient record application runs on Oracle 11i and consists of many small， randomly accessed files. The database is kept on three clustered Sun servers and currently uses 30 TB of data space. Their imaging application that retains and manages x-rays， consists of Filenet， CommonStore， and TSM running on an IBM Power750 server， and is currently using 65TB of data space. Which of the following disk solutions meets the customer’s requirement（）
A.IBM System Storage DS8700 2 way
B.IBM System Storage DCS9900
C.IBM System Storage DS8700 4 way
D.IBM XIV Storage System
單項選擇題
A customer using an IBM System Storage DS8700 is facing performance problems. After the analysis by the technical specialist， the diagnosis indicates that the cache hits may be improved by a cache upgrade. How can the system be monitored in order to check the benefits of the cache upgrade（）
A.using the "vmstat" command on the AIX servers connected via SAN to the DS8700 system
B.look at the IOPS using the DS8700
C.reading the performance reports via Tivoli Storage Productivity Center for Disk
D.generating reports using theTotalStorage Expert
單項選擇題
A new Disaster Recovery site has been established using Metro Mirror to hold synchronous data at both sites. After the Metro Mirror is started， one of the most important applications， a DB2 database， slows down. An analysis shows that the I/O rate （especially write I/Os） is less than 40% compared to the former rates. What is the best explanation for this behavior（）
A.the bandwidth of the PPRC connection between the two sites is too small
B.the DS8000 SFI at the remote site was shipped with slower disks
C.I/O rates vary， depending on the distance between the two sites and the rates cannot be changed easily， due to latency
D.the DB2 database does not work with Metro Mirror without an additional license

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