單項(xiàng)選擇題Which of the following logical volume placement policies is likely to give the best performance in most cases, all other factors being equal?()

A. INTRA-POLICY set to ’edge’, INTER-POLICY set to maximum
B. INTRA-POLICY set to ’center’, INTER-POLICY set to maximum
C. INTRA-POLICY set to ’middle’, INTER-POLICY set to minimum
D. INTRA-POLICY set to ’center’, INTER-POLICY set to minimum


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1.單項(xiàng)選擇題The system administrator notices that IP packets are not getting forwarded. The system administrator wants to use an AIX machine as an internetwork router over TCP/IP networks. Which of the following commands will allow this change on the fly?()

A. Some network attributes are runtime attributes that can be changed at any time. Others are loadtime attributes that must be set before the netinet kernel extension is loaded and be placed in the /etc/rc.net or /etc/rc.bsdnet file. This parameter cannot be done on the fly, since a reboot is required.
B. Add to the /etc/rc.net file or if a Berkelye-style network configuration, /etc/rc.bsdnet, and issue the command: no -a ipforwarding=1 to start ipforwarding immediately.
C. Add to the /etc/rc.net file or if a Berkeley-style network configuration, /etc/rc.bsdnet, and issue the command: no -o ipforwarding=0 to start ipforwarding immediately.
D. Add to the /etc/rc.net file or if a Berkeley-style network configuration, /etc/rc.bsdnet, and issue the command: no -o ipforwarding=1 to start ipforwarding immediately.

3.單項(xiàng)選擇題After issuing the nfsstat -rs command, the null received column starts to grow. This indicates which of the following conditions?()

A. Not enough NFS daemons running
B. Too many NFS daemons running
C. nfs_tcp_socketsize is too small
D. nfs_tcp_socketsize is too large

4.單項(xiàng)選擇題Which of the following is true about rmss?()

A. rmss is a part of performance toolbox and stands for Reduced Memory System Simulator
B. rmss is a part of perfpmr and stands for Real Memory System Simulator
C. rmss is part of the standard bos.perf filesets and stands for Redundant Memory System Simulator
D. rmss is part of  WLM and stands for Real Memory System Simulator

5.單項(xiàng)選擇題A system administrator increases the mbuf pool allocation, then runs vmstat. It is noticed that the paging rate has not decreased. What is the most effective option to maintain the mbuf pool and decrease paging?()

A. Increase the number of CPUs.
B. Increase the physical memory.
C. Set the PSALLOC environment variable to ’late’.
D. Set the PSALLOC environment variable to ’early’.

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Which of the following RAID levels provide the best performance for a system where there are mostly writes occurring?()

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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?()

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In AIX 5L and later, the operating system supports the /proc filesystem. What would be the best description of the /proc filesystem?()

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To examine the Exhibit, press the Exhibit button. While a user is compiling a C program, "vmstat 120 10" is run to determine the cause of a performance problem.  Using the vmstat output as shown in the exhibit, which of the following conclusions is most appropriate to draw about the I/O bottleneck?()

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A TCP/IP application is transferring files from a personal machine to a remote machine.  The application writes 32 kilobytes of data at a time to the socket, but has not issued a system call to set the window size.  Which of the following procedures should be performed on the personal machine to increase the throughput of the application?()

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Which of the following commands should be used to tune parameters of devices that are displayed with lsattr?()

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Which of the following is true about rmss?()

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In an iostat report, which of the following options best describes the value of % tm_act?()

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