I want to know how to decrease the filesystem size

[Santhikumari]

Hi,

I am new to this field. I want to know the how to decrease the /var filesystem. and how to move the files from /var to another.

[Dennis Handly]

You want to remove/move files so there is more space? Or do you want to reduce the size of the whole filesystem? (You only have 614 Mb.)

You can't move files if they are needed in single user mode.
Otherwise you can move them and leave symlinks pointing to the new location.

[Santhikumari]

which command is used for reducing the size of the filesystem?

[Suraj K Sankari]

Hi,

lvreduce is the command to Reduce logical volume

Suraj

[Duncan Edmonstone]

Suraj,

*Please* be careful when giving this sort of advice... yes lvreduce will reduce the size of a logical volume, but if it is done before the filesystem on the logical volume has been reduced it will completely corrupt the filesystem.

Santhikumari,

How you reduce the size of a filesystem depends on whether or not you have Online JFS installed or not. If you do, you can reduce the size of the filesystem online, if you don't you'll need to go to single user mode via a reboot to accomplish this.

Check what the output of the command:

swlist | grep -i jfs

returns - hopefully it will mention the OnlineJFS product.

HTH

Duncan

[Santhikumari]

Hi duncan,

I dont have the root access. So that command is not working in the usermode.Please help me regarding this.

[Duncan Edmonstone]

Santhikumari

>> I dont have the root access.

Then there is no point in proceeding - you cannot carry out system administration tasks such as extending/reducing filesystems without root access. Are you not the system adminsitrator for this server? If you aren't, why don't you ask the actual sysadmin to reduce the filesystem size for you?

HTH

Duncan

[Wim Rombauts]

If you don't have root access, forget it.
Only root can manage filesystems, so :
- Get root access, or find someone who has and wants to help you.
- What type of filesystem is it ? HFS ? Or VxFS ? If it is HFS, you can't reduce your filesystem. You well need to create a new smaller filesystem, copy over the data and witch the mountpoint.
- If it is VxFS, check if you have Online-JFS. If not, you will have to reboot your system to single-user mode.
- If you have Online-JFS, look at fsadm (manpage fsadm_vxfs). fsadm -F vxfs -b should help you.

Be aware that shrinking a filesystem is not always possible.
After the filesystem has been shrinked, carefully reduce the LVM with lvreduce, but don't set it smaller as the new filesystem size, or you will indeed have a corrupted filesystem.

[Santhikumari]

Hi,

I am taking KT. My senior is on leave. I got the error from that. It is very important server. So there is any way to reduce the size of the FS.

[Santhikumari]

Hi rombauts,

/var (/dev/vg00/lvol8 ) : vxfs.

I got the above output fron "df -n".

[Duncan Edmonstone]

>> So there is any way to reduce the size of the FS.

Not without root access. If you don't have it, you can't do it.

HTH

Duncan

[Santhikumari]

Thanks to all.

I will inform to my senior regarding this error. But I want to know the procedure. Please Could you give me the details of this.

[Dennis Handly]

>I got the error from that. It is very important server. So there is any way to reduce the size of the FS.

Do you have the exact error message? It may help us determine what you really want.

I typically never hear anyone say make /var smaller, only bigger.
See my first reply.
And if you can't make it bigger, you can try to reduce or move the files.

[prasadb]

HELLO Santhikumari

KEEP ASSIGNING POINTS TO THOSE WHO SPEND THEIR VALUABLE TIME FOR YOU