单项选择题

A customer has the need to implement a tape backup solution to backup a 500GB database on a daily basis. Which of the following factors is the most important consideration in the design of a backup and restore solution？（）

A.Amount of data in the backup
B.Bandwidth available to the tape device
C.Length of the backup/restore window
D.Speed that the backup system can find files for restoration

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单项选择题

A customer wants to hold all enterprise data on their DS4000 system. Several servers were added after they purchased another company. The servers that have to be run are：
（1）An Oracle database running on a HP-UX server
（2）Several virtual machines running on VMWare ESX server
（3）A Microsoft cluster running Exchange 2000 server
Which of these new servers can be integrated with the DS4000？（）

A.DS4000 storage does not support HP-UX， so the HP-UX server cannot be integrated.All other new servers can be used.
B.An Exchange cluster needs local disks， so the DS4000 cannot be used for this.All other new servers can be used.
C.When equipped with proper HBA’s and subsystem device drivers， all new servers can operate with the DS4000 storage device.
D.VMWare ESX can use the DS4000 storage； however， the virtual machines running in it will not have access to this storage other than via a virtual disk.All other new servers can be used.

单项选择题

A customer is building a database server， and the server does sequential write most of the time. They are planning to use an IBM x445 and a ServeRAID-6M adapter. Which of the following fault tolerant RAID levels will perform best for sequential write？（）

A.RAID-5 with cache write back
B.RAID-1E with cache write back
C.RAID-10 with cache write thru
D.RAID-50 with cache write thru

单项选择题

The statistics for a poorly performing， dual-processor x365 system are as follows：
（1）Processor： 80% for 5-second increments
（2）Memory page faults： 360/second average over 15 minutes
（3）Disk % disk time： 100%
Which of the following will provide the greatest performance improvement？（）

A.Add memory
B.Add a processor
C.Exchange the existing processor for a faster processor
D.Add a faster disk subsystem