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Hi, I have a query regarding the vgs in my Linux server : #vgs VG #PV #LV #SN Attr VSize VFree data 1 1 0 wz--n- 231.81G 171.81G os 1 ...
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  1. #1
    Linux Newbie
    Join Date
    May 2012
    Posts
    110

    vgs help needed....want to understand it...?


    Hi,

    I have a query regarding the vgs in my Linux server :

    #vgs
    VG #PV #LV #SN Attr VSize VFree
    data 1 1 0 wz--n- 231.81G 171.81G
    os 1 3 0 wz--n- 40.00G 10.00G


    Data is showing 171.81G free .

    What does this Data means in VG Column ?

    My Filesystem is :
    #df -H
    Filesystem Size Used Avail Use% Mounted on
    /dev/mapper/os-root 15G 9.9G 4.0G 72% /
    /dev/mapper/os-var 8.4G 2.1G 5.9G 26% /var
    /dev/mapper/data-export
    63G 13G 47G 22% /export
    /dev/sda1 104M 22M 77M 24% /boot
    tmpfs 13G 0 13G 0% /dev/shm
    /dev/sdb1 358M 26M 333M 8% /dcr_shared/ocr_1
    /dev/sdb2 358M 26M 333M 8% /dcr_shared/ocr_2
    /dev/sdb3 358M 34M 325M 12% /dcr_shared/vote_1
    /dev/sdb5 358M 34M 325M 10% /dcr_shared/vote_2
    /dev/sdb6 358M 34M 325M 20% /dcr_shared/vote_3
    /dev/sdb7 360M 24M 337M 7% /ocr_shared/spfiles
    /dev/sdt1 54G 4.2G 50G 9% /edp_bd/SDPPR01/data1
    /dev/sdt2 54G 310M 54G 2% /edp_bd/SDPPR01/index1
    /dev/sdal1 451G 14G 438G 6% /recovery_area
    /dev/sdam1 11G 84M 11G 1% /log



    what is DATA ?

  2. #2
    Trusted Penguin
    Join Date
    May 2011
    Posts
    4,307
    Hi,

    In your example, data (and os) reflect the names of Volume Groups. Think of them as logical disks, which are made up of of Physical Volumes, and can be partitioned into Logical Volumes. That is a very loose abstraction, but it is the general idea.

    Read up on LVM (which is what VGs and such are part of) here:

    http://www.web-manual.net/linux-3/lo...ager-in-linux/

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