单项选择题

WhichofthefollowingstatementsareFALSEconcerningthedefra……

Which of the following statements are FALSE concerning the defragfs command？（）

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.

<上一题目录下一题>

热门试题

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

单项选择题Inordertoensurebestreadperformance，whichofthefollowingindicateshowlargeanapplication’sreadbuffersizeshouldbeifthefilesystemtobereadisstripedacrossNdisksusingLVMstriping？（）

A. N times the stripe unit size
B. N times the VMM minfree parameter
C. The same value as that of the VMM maxfree parameter
D. The same value as that of the VMM maxrndwrt parameter

单项选择题ATCP IPapplicationreceivesfilesfromaremotemachine.Theapplicationreads32kilobytesofdataatatimetothesocket，buthasnotissuedasystemcalltosetthewindowsize.Whichofthefollowingproceduresshouldbeperformedonthepersonalmachinetoincreasethethroughputoftheapplication？（）

A. Increase the size of thewall
B. Increase the size of sb_max
C. Increase the size of tcp_recvspace
D. Increase the size of tcp_sendspace

单项选择题Whichofthefollowingcommandsshouldbeusedtodeterminewhetheralogicalvolumeiscontiguousacrossadisk？（）

A. lslv
B. lsfs
C. lspv
D. fileplace