单项选择题

Which of the following procedures WILL NOT increase contiguous free space on a the filesystem /data1， located on /dev/lv01， that is heavily fragmented？（）

A. Run defragfs -r /data1； defragfs /data1
B. Run defragfs -r /dev/lv01； defragfs /dev/lv01
C. Back up the filesystem by name， unmount the filesystem， recreate the filesystem by running mkfs /dev/lv01， and restoring the data from the backup.
D. Back up the filesystem by inode， unmount the filesystem， recreate the filesystem by running mkfs /dev/lv01， and restoring the data from the backup.

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单项选择题

The system administrator notices that there is an I/O bottleneck on one of three disks in datavg volume group. This problem disk contains the JFS log， loglv00 and one filesystem， /mydatabase. There are no other logical volumes on this disk. Which of the following options would be the best solution？（）

A. Increase the size of the JFS log logical volume so more transacations can be written to this log.
B. Create a second， additional JFS log and have the /mydatabase logical volume point to both JFS logs.
C. Migrate the JFS log device to another physical disk in the same volume group.
D. Only one JFS log device for each volume group can be used. Use the migratepv command to move the JFS log device to an empty disk in another volume group.

单项选择题

To examine the Exhibit， press the Exhibit button. Using the "ps -mo THREAD" output as shown in the exhibit， which of the following conclusions is most appropriate to draw？（）

A. This is a uniprocessor system
B. The "prog" process has a nice value of 107
C. There are two active processors on this system
D. The "prog" process will only be scheduled to run on processor 0

单项选择题

Which of the following metrics provided by the iostat report is used to initially determine if a disk is I/O bound？（）

A. tin
B. tout
C. % idle
D. % tm_act