單項(xiàng)選擇題In order to ensure best read performance, which of the following indicates how large an application’s read buffer size should be if the filesystem to be read is striped across N disks using LVM striping?()

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


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5.單項(xiàng)選擇題Which of the following commands is used to adjust the minperm and Maxperm values of real memory to 4% and 80%?()

A. vmtune -N4 -M80
B. vmtune -f4 -F80
C. vmtune -l4 -L80
D. vmtune -p4 -P80

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