Increase logical volume, how much space left

[Ratzie]

I am running short on a partition and need to increase the size. I know when I created the server that I left some drive space, and did not allocate it it all.

Question is I forgot how to find out, lets day out of a 72GB drive is left for me to use.

I also need to extend a logical volume by 4GB, but how do I do that? Where? Does the server need to be rebooted?

/dev/vg00/lvol9 2048000 482982 1467264 25% /opt/app/oracle/archivelog/database

This partition will fill up completely when I tried to test backups.

[Pete Randall]

Take a look at the output of "vgdisplay vgname". You'll see Total PE, Free PE and PE size. The number of free PEs times the PE size will tell you how much free space there is.


Pete

[Jeff Schussele · Accepted solution]

Hi,

vgdisplay is the command to determine free space

vgdisplay /dev/vg_name

Check the "Free PE" field & if it's >0 then multiply that by the "PE Sizs (Mbytes)" value for the total amount free.
Then just extend the LV to the desired size with

lvextend -L XXXXXM /dev/vg_name/lv_name

where XXXXX is the value in Megabytes you want to become - NOT the addition but the new total size.
At that point IF you have OnLineJFS you can extend the filesystem with

fsadm -F vxfs -b XXXXXM /mnt_point

again where XXXXX is the new total size.
If you don't have OnLineJFS you'll need to unmount the FS & use extendfs to increase it & then remount it.

HTH,
Jeff

[Etienne Roseau]

hi,
no many things to add; except :
if you resize you FS by line commands, obviously you have to check your sys-space with lvdisplay / vgdisplay...
put a # in the /etc/fstab and unmount it.
when recreate, mount it, drop the #, and check the /etc/mnttab.
otherwise, SAM will do everything for you.
see the doc attached.
if you need translation, i'll do !
hope it will help !

[Geoff Wild]

No reboot - but you shouldn't have oracle on vg00!

vg00 should just be for the OS.

Should have a separate disk for oracle.

Anyways,

vgdisplay -v /dev/vg00

Look at:

PE Size (Mbytes) 8
Total PE 8680
Alloc PE 5010
Free PE 3670

multiply Free by Size - if for then 4GB, then:

Looks like lvol9 is 2GB

so,

lvextend -L 6144 /dev/vg00/lvol9
fsadm -b 6144M /opt/app/oracle/archivelog/database

That't if you have online jfs, else you will have to shutdown oracle, umount opt/app/oracle/archivelog/database, lvextend -L 6144 /dev/vg00/lvol9, extendfs /opt/app/oracle/archivelog/database

Rgds...Geoff

[Ratzie]

how do you know if you have online jfs

[john kingsley]

# swlist -l fileset | grep -i onlinejfs

output on my machine:
# Online JFS B.11.11 Online features of the VxFS File System
OnlineJFS B.11.11 VxFS File System

[Hein van den Heuvel]

As others replies, vgdisplay is your main tool to help resolve this. But it is cryptic (PE vs MB) and verbose (many lines).
I like my information more dense and so i created a perl script to help me understand vgdisplay info more readily. I use it 'all the time' maybe it helps you too?

I'll include it, and attach it (nicer spacing).

Hein.

print "Type Name Allocated Total Free\n";
print "----- ----------------------------- -------- -------- --------\n";
foreach $_ (`/usr/sbin/vgdisplay -v`) {
if (/ PVG /) {
$pvg = 1; # Don't know what to do with Private Volume Groups
next;
}
if ($pvg) {
next unless (/^$/);
$pvg = 0;
}

if (/^(\s*\w\w) Name\s+(\S+)/) {
$type = $1;
$name = $2;
$name =~ s/\/dev//;
if ($type =~ /LV/) {
$stripes = 0;
foreach $_ (`/usr/sbin/lvdisplay /dev$name`) {
$stripes = $1 if (/^Stripes\s+(\d+)/);
$ssize = $1 if (/^Stripe S.*\s(\d+)/);
}
$name .= " $stripes x $ssize" if ($stripes);
}
}
if (/^PE Size \(Mbytes\)\s+(\w+)/) {
$pe = $1;
$name = sprintf ("%-28s%2d", $name, $pe);
}
$alloc = int($1) if (/Allo.* PE\s+(\w+)/);
$total = int($1) if (/Total PE\s+(\w+)/);
$free = int($1) if (/Free PE\s+(\w+)/);
if (/^$/) {
if ( 0 == $alloc + $total + $blank_line++) {
print "\n";
} else {
printf ("%-6s%-30s%9d%9d%9d\n",
$type, $name, $pe * $alloc, $pe * $total, $pe * $free);
}
$name = $type = " ";
$alloc = $total = $free = $blank_line = 0;
}
}

[Jan Sladky]

you can figure out by mount -v command (fs has to be mounted before)

if fs is unmouted you will use

fstype /dev/vg00/lvol1

br Jan

[Petr Simik_1]

Hi,
I use man lvextend and there is example step-by-step how to extend LV. Works good.

Increase the size of a file system existing on a logical volume.

First, increase the size of the logical volume.
lvextend -L 400 /dev/vg06/lvol3

Unmount the file system.
umount /dev/vg06/lvol3

Extend the file system to occupy the entire (larger) logical volume.
extendfs /dev/vg06/rlvol3

Remount the file system.
mount /dev/vg06/lvol3 /mnt

[Ratzie]

Thanks