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Friday, 25 November 2011

AIX Performance Monitoring Commands

# sar : System Activity Report.
# vmstat : Virtual Memory Monitoring
# iostat : I/O Monitoring.
# lparstat : LPAR Statistics.
# mpstat : LPAR Statistics.
# netstat : Network Traffic Monitoring.
# topas : Global System Monitoring Tool.
# ps auxwww : View process details via CPU and Memory Consumption.
# filemon : Monitor filesystem.
# fileplace : Monitor filesystem.
# entstat : Interface Statistics.
# monhmc : Monitor HMC.



Add a Removable Media Drive

The following procedure uses SMIT to add a CD-ROM drive to your system. Other types of removable media drives are added using different fast paths but all follow the same general procedure. You can also add a removable media drive using Web-based System Manager, the Configuration Manager, or the mkdev command.
  1. To add a CD-ROM drive to your system, install the hardware according to the documentation that came with your system.
  2. With root authority, type the following SMIT fast path:
    smit makcdr
  3. In the next screen, select the drive type from the available list of supported drives.
  4. In the next screen, select the parent adapter from the available list.
  5. In the next screen, at minimum, select the connection address from the available list. You can also use this screen to select other options. When you are finished, press Enter, and then SMIT adds the new CD-ROM drive.
At this point, the new CD-ROM drive is recognized by your system. To add a read/write optical drive, use the smit makomd fast path. To add a tape drive, use the smit maktpe fast path.

Replace a Failed Physical Volume in a Mirrored Volume Group

The following scenario replaces a failed or failing disk associated with a physical volume within a mirrored volume group. In the instructions, you use the Configuration Manager to configure the new disk (named hdisk10), and then use the replacepv command to replace a physical volume in a mirrored volume group that resides, at least in part, on a failed disk drive (named hdisk02) without losing the physical volume's contents. You do not need to reboot or schedule downtime to complete the following procedure.
  1. Select a new disk drive that has a capacity at least as large as the failed disk.
  2. With root authority, run the Configuration Manager to configure the new disk. Type the following on the command line:
    cfgmgr -l hdisk10
    The -l flag allows you to configure only the specified device and any "child" devices. Without this flag, the cfgmgr command runs Configuration Manager against the entire system.
  3. Replace the physical volume so it can begin using the new disk, using the following command:
    Note:
    If the mirror for the logical volume is stale, the replacepv command does not work correctly.
    replacepv hdisk02 hdisk10
  4. When the associated mirrored volume group is the rootvg, you must also run the following commands to clear the failed disk from and add the new disk to the boot image:
    chpv -c hdisk02
    bootlist hdisk10
    bosboot -a
    The chpv -c command clears hdisk02 from the boot image. The bootlist command adds hdisk10 to the list of possible boot devices from which the system can be booted. The bosboot -a command creates a complete boot image on the default boot logical volume.
At this point, the physical volume hdisk02 now maps to the newly configured hdisk10.