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单选题
Sometimes performance is more important than availability （e.g.， in cases where the data can be easily re-created）. Which of the following is the appropriate disk configuration for an application that requires faster writes over availability？（）
A
RAID-1
B
RAID-5
C
RAID-0+1
D
RAID-0
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Sometimes performance is more important than availability （e.g.， in cases where the data can be easily re-created）. Which of the following is the appropriate disk configuration for an application that requires faster writes over availability（）A、RAID 1B、RAID 6C、RAID 0 + 1D、RAID 0
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When analyzing disk I/O performance， which of the following metrics and/or statistics should be included in the study？（）A、 Disk size， stock availability， VHDCIB、 Disk size， distance， temperature， and compatibilityC、 Disk fragmentation， MTBF， and maintenanceD、 Disk configuration， throughput， transactions， queues， and latencies
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Sometimes performance is more important than availability （e.g.， in cases where the data can be easily re-created）. Which of the following is the appropriate disk configuration for an application that requires faster writes over availability？（）A、RAID-1B、RAID-5C、RAID-0+1D、RAID-0
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单选题When setting up schedules and enforcing scheduling of different types of workloads， which of the following are critical performance issues？（）A
Disk fragmentationB
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单选题Which of the following disk protection methods would be used to provide the maximum amount of data availability（）A
RAID 0B
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RAID 3D
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单选题Which of the following would be used to optimize network performance and increase bandwidth availability?（）A
Packet analysisB
QoSC
Traffic shapingD
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多选题Full Atomicity, Consistency, Isolation, Durability (ACID) compliance is a necessity for a new application, which heavily reads and writes data. This requires the following config file options: Sync_binlog=1 Innodb_flush_log_at_trx_commit=1 Innodb_doublewrite=1 However, this configuration is expected to introduce disk I/O overhead. What three changes will reduce disk I/O overheads?（）AUse of soft links for database directories on the same physical diskBUse of delay_key_write=ON for batch index updateCAllocation of RAM to the buffer pool such that more of the data can fit in RAMDPlacement of InnoDB log files and datadir on separate physical disksEUse of separate directories on the same physical disk for log files and data files
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单选题Which of the following is an advantage of hardware RAID over software RAID？（）A
Hardware RAID costs less than software RAIDB
Hardware RAID is built into the operating system’s softwareC
Hardware RAID has better performance than software RAIDD
Hardware RAID requires no configuration and software RAID does
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单选题An application server is running slowly. After viewing performance monitoring data it is detected that the disk queue length is high. Which of the following could BEST resolve the situation？（）A
Add more disk drives.B
Increase the amount of virtual memory.C
Add a faster processor.D
Add more memory to stop paging to disk.
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单选题Which of the following is an advantage of using non-ECC memory over ECC memory？（）A
ECC is faster than non-ECCB
Non-ECC is faster than ECCC
Non-ECC is more expensive than ECCD
Non-ECC checks for memory errors
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单选题Which of the following statements is mot correct about mirroring?（）A
Mirroring, with the write-verify option turned on, can be used to increase performance.B
Mirroring is a better choice that disk-striping, for large sequential-access file system when one is looking for performance.C
Mirroring, with a parallel-scheduling policy, may improve I/O read-operation performance.D
Mirroring, with maximum inter-disk allocation policy, is used to enhance availability.
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单选题A customer has no available floor space for expansion and room for only one disk enclosure pair in their DS8700. Four disk enclosure pairs are required to meet the current I/O needs of a data warehousing application. They are only utilizing 10% of their total capacity. Another application workload needs to be added to the system but requires two disk enclosure pairs. The customer is considering SSD and Easy Tier. Which of the following is the primary function of Easy Tier（）A
reduce power consumption per unit of storageB
balance the total workload with other DAsC
automatically moves hot spots to the appropriate resourceD
SANtiering permits more flexibility by adding additional data paths
考题
单选题Sometimes performance is more important than availability （e.g.， in cases where the data can be easily re-created）. Which of the following is the appropriate disk configuration for an application that requires faster writes over availability（）A
RAID 1B
RAID 6C
RAID 0 + 1D
RAID 0
考题
单选题When analyzing disk I/O performance， which of the following metrics and/or statistics should be included in the study？（）A
Disk size， stock availability， VHDCIB
Disk size， distance， temperature， and compatibilityC
Disk fragmentation， MTBF， and maintenanceD
Disk configuration， throughput， transactions， queues， and latencies
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单选题The statistics for a poorly performing x366 system are as follows： （1）Processor： 90% for 5 second increments （2）Memory page faults： 20/second average over 15 minutes （3）Disk： disk time 1% Which of the following will provide the greatest performance improvement？（）A
Add memoryB
Add a processorC
Add a faster disk subsystemD
Exchange the processor with a faster processor
考题
单选题Which one of the following characteristics is true regarding the use of hubs and switches?（）A
Hubs can have their ports be configured with VLANsB
Using hubs is costly with regard to bandwidth availability.C
Switches can not forward broadcasts.D
Switches are more efficient than hubs in processing frames.E
Switches increase the number of collision domains in the network.
考题
单选题An application server is running slowly. After viewing performance monitoring data it is detected that the disk queue length is high. Which of the following could BEST resolve the situation?（）A
Add more disk drives.B
Increase the amount of virtual memory.C
Add a faster processor.D
Add more memory to stop paging to disk.
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