Size of File system (/opt/oracle) should be extended

[Vipin Singhal]

Hi friends,
One of my file system got 100% utilized:
/dev/vg00/lvol9 16777216 16740329 36887 100% /opt/oracle

and I need to extend this file system size.

I have 1275 free PEs of 4 MB each.
what will be steps to do it?
is there any problem if i unmount this file system, because its volume group is vg00 & filesystem /opt/oracle.

I need your suggestions,
Thanks
Vipin

[Luk Vandenbussche]

Hi

Stop oracle (if you don't have online JFS

umount /opt/oracle
lvextend -L 20000 /dev/vg00/lvol9
extendfs -F vxfs /dev/vg00/rlvol9
mount /opt/oracle

restart oracle

[Pete Randall]

Vipin,

Once again, you should check the man pages. This time the EXAMPLES section of lvextend contains the information you need:

"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"

In your case, you would obviously substitue /dev/vg00/lvol9 in place of /dev/vg06/lvol3 and /opt/oracle for /mnt. If you have problems unmounting, you might want to reboot in single user mode.


Pete

[Pete Randall]

Sorry, I missed the first step of lvextending the LV:

"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"


Pete

[Zeev Schultz]

If its a mountpoint under /opt should be no problem to umount.

So first :

umount /opt/oracle


Use lvextend -l / -L to
increase number of extents (each of 4MB usually) or (with -L) number of MBs.

Like:

lvextend -L 400 /dev/vg00/lvol9

makes this volume to be 400 Mb.

Next use extendfs to update filsystem size:

extendfs -F vxfs /dev/vg00/rlvol9.

If your filesystem is of OnlineJFS kind (swlist -l product | grep JFS) you can give up on mount/umount phase and run:

fsadm -F vxfs -b .

[Vipin Singhal]

This is the output:

# swlist -l product | grep JFS
JFS B.11.23 The Base VxFS File System
OnlineJFS B.11.23.05 Online features of the VxFS File System


which one will be more secure, should i stop the database?

[Bill Hassell]

You can extend the logicalo volume and filesystem without stopping Oracle since you have Online JFS installed. As with any major change to a directory, you should always backup the files, then extend the filesystem. NOTE: it appears that everything has been dumped into the /opt/oracle directory, not a good choice at all. /opt is the storage location for the application files, but data files should reside on separate volumes, preferaably on different disks and I/O channels. A standard Oracle install would only need a few hundred megs in /opt. If indeed /opt/oracle supposedly contains only the application programs, analyze the directories with:

du -kx /opt/oracle | sort -rn | head -20

You may discover a big mistake in one of the /opt/oracle directories and not need additional space.

[Vipin Singhal]

Our Oracle database administrator is ready to stop the database,

then plz tell me the step by step command which i need to use.

i need to extend this file system by 4Gb

[Devender Khatana]

Hi,
The procedure is allready told earlier just put the required space to be extended to in place.

Preperation -

Atleast 1000 Free PE should be there in vg00 for extending this file system by 4GB (1000PEs of 4MB each).Also you should first back up this file system atleast.


1. Stop Oracle
2. #umount /opt/oracle
3. #lvextend -L 20000 /dev/vg00/lvol9
4. #extendfs -F vxfs /dev/vg00/rlvol9
5. #mount /opt/oracle
6. #bdf (To confirm the successful completion)
7. Start and check application.(Oracle)

HTH,
Devender

[Pete Randall]

Since you have OnlineJFS, there is no need to unmount, so the steps are:

lvextend - to enlarge the LV
fsadm -b newsize - to increase the file system


Pete