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Add space to Red Hat directory

Posted on 2013-10-25
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Greetings,
Below are the results of running df -h on our red hat server.

Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/rootvg-rootvol
                      4.0G  3.5G  310M  92% /
tmpfs                  16G     0   16G   0% /dev/shm
/dev/sda1             194M   73M  111M  40% /boot
/dev/mapper/rootvg-homevol
                      2.0G  1.2G  694M  64% /home
/dev/mapper/rootvg-tmpvol
                      4.5G   18M  4.2G   1% /tmp
/dev/mapper/rootvg-varvol
                       22G  3.8G   17G  19% /var
/dev/mapper/rootvg-datavol
                       16G  2.9G   13G  19% /data
/dev/mapper/rootvg-sqlvol
                      142G  135G     0 100% /var/lib/mysql
/dev/mapper/rootvg-logvol
                       16G  248M   15G   2% /var/log

How do I add more space to the /var/lib/mysql (its at 100%) using lvm? Thank you.
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Question by:centem
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LVL 13

Expert Comment

by:Daniel Helgenberger
ID: 39601084
Please have a look at:
vgdisplay
witch shows you available space in the Volume Group. Is there anything left?
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Author Comment

by:centem
ID: 39601098
These are the results of that command.

  --- Volume group ---
  VG Name               rootvg
  System ID
  Format                lvm2
  Metadata Areas        3
  Metadata Sequence No  14
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                8
  Open LV               8
  Max PV                0
  Cur PV                3
  Act PV                3
  VG Size               607.72 GiB
  PE Size               32.00 MiB
  Total PE              19447
  Alloc PE / Size       6704 / 209.50 GiB
  Free  PE / Size       12743 / 398.22 GiB
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Daniel Helgenberger earned 2000 total points
ID: 39601156
Ok, you can add up to about 400GiB to your LV. For sake of example I add 100GiB, change this to your needs.
All this can be done on a running system. Also, I assume you have an EXT filesystem on the volume sqlvol? Please make sure with mount; if not then do not run resize2fs!
$ lvextend -L +100G /dev/mapper/rootvg-sqlvol
$ resize2fs /dev/mapper/rootvg-sqlvol
$ df -h /dev/mapper/rootvg-sqlvol

Open in new window

resize2fs will claim all available space on the LV.

If you need to add more space, then you would first need to add a new PV the your rootvg; in general this means some downtime.
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Author Closing Comment

by:centem
ID: 39601200
Great explanation. Worked! Thanks.
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