单项选择题

When a system has both online transaction processing as well as large batch processing， which of the following common procedures will best help to improve system performance？（）

A. Boost the priority of batch jobs.
B. Schedule batch runs to reduce contention with OLTP.
C. Schedule OS maintenance such that it includes frequent application of PTFs.
D. Perform incremental backups of transaction processing and full backups of batch processing.

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单项选择题DataistransferredbetweentwoserversusingNFS，whereoneserverisconfiguredwithtokenring，andtheothersystemisconfiguredwithethernet.Itisdiscoveredthattheperformanceisgreatlyreducedduringthistransfer.Whichofthefollowingstepsshouldbetakentoimproveperformance？（）

A. Reduce MTU on token ring system to match ethernet system using ifconfig command （i.e. ifconfig tr0 mtu 1500）
B. Reduce MTU on token ring system to match ethernet system using no command （i.e. no -o mtu=1500）
C. Increase MTU on ethernet system to match token ring system using ifconfig command （i.e. ifconfig en0 mtu 4096）
D. Increase MTU on ethernet system to match token ring system using no command （i.e. no -o mtu=4096）

单项选择题ThesystemadministratorhasdeterminedthatanewJFSlogneedstobecreatedonadifferentdisk，inordertodecreaseanI Obottleneck.Whichofthefollowingstepsarethemostcorrect？（）

A. mklv -t jfslog -y LVname VGname 1 PVname     logform /dev/LVname      chfs -a log=/dev/LVname /filesystemname m     ount and unmount filesystem
B. mklv -t jfslog -y LVname VGname PVname       unmount filesystem        vi /etc/filesystems， change entry for lv to point filesystem to new JFS log       mount filesystem
C. mklvcopy -a jfslog -y LVname VGname 1 PVname       chfs -a log=/dev/LVname /filesystemname       unmount and mount file system
D. mklvcopy -t jfslog -y LVname VGname 1 PVname       logform /dev/LVname        vi /etc/filesystems， change entry for lv to point filesystem to new JFS log      unmount and mount filesystem

单项选择题WhichofthefollowingstatementsareFALSEconcerningthedefragfscommand？（）

A. The defragfs command should not be run against file systems and logical volumes that contain mostly transitory information， such as /tmp.
B. The defragfs command should not be run on a large JFS2 file system when running on a 32-bit kernel.
C. The defragfs command can improve file system performance by increasing the file system’s contiguous free space.
D. The defragfs command can only be run against file systems that are mounted with read-write permissions.

单项选择题Given the following on a system that is not a name server， which will be the first area searched to resolve a host name to an IP address？（） #cat etc resolv.conf domain abc.century.com nameserver 192.9.201.1 nameserver 192.9.201.2 #cat etc netsvc.conf hosts = bind，nis，local #echo $NSORDER local，bind

A. /etc/hosts on server 192.9.201.2
B. /etc/hosts on the local system
C. /etc/named.rev on 192.9.201.1
D. /etc/netsvc.conf on the NIS server

单项选择题AnAIXsystem，whichisrunningadatabase，ishavingperformanceissueswithI Owriting.TheDBAhasprovidednumbersfortheHIGHandLOWwatermarksforpendingfilewrites，whichwilloptimizethesystemforbestperformance.Tosetthesenumbers，whichofthefollowingcommandswouldbeused？（）

A. perfmon -h 30 -l 25
B. chdev
C. no -o
D. smit chgsys