topic Re: How to enable large file size in Operating System - HP-UX

How to enable large file size

walter crasto_1 — Thu, 28 Jul 2005 04:06:46 GMT

Hi,

I want to create more than 2GB file on my HP-UX 11.0 OS system.

I have around 13GB free space in /opt also my ulimit is set to set to unlimited.

But still I am not able to create large file. Do I need to set any parameter.

regards
varian

Re: How to enable large file size

Simon Hargrave — Thu, 28 Jul 2005 04:10:47 GMT

fsadm -F vxfs -o largefiles /dev/vg00/lvol4 (or wherever your /opt is).

This will enable large files on your vxfs filesystem.

Re: How to enable large file size

Simon Hargrave — Thu, 28 Jul 2005 04:12:54 GMT

Sorry that should be the raw volume ie rlvol4

Also the filesystem needs to be unmounted before you can do this.

I would also question why you are enabling large files on /opt. Presumably your large files are some sort of data file, in which case they should really be on their own filesystem rather than on /opt which should remain fairly static.

Re: How to enable large file size

Pedro Cirne — Thu, 28 Jul 2005 04:13:54 GMT

Hi,

You must use the flag "-o largefiles" when creating the filesystem.

If you have Online JFS installed you can change it on-line with fsadm.

Check man fsadm_vxfs for details.

Enjoy :)

Re: How to enable large file size

Martin Brachtl — Thu, 28 Jul 2005 04:15:02 GMT

It is also necessary to mount the filesystem with largefiles mount option. Check the /etc/fstab.

Re: How to enable large file size

Lokesh_8 — Thu, 28 Jul 2005 04:21:46 GMT

Hi anit,

Just make an entry in fstab.
Change your lvol with your /opt filesystem device name.
/dev/vg00/lvol7 /opt vxfs delaylog,largefiles 0 2

Regards,
lokesh

Re: How to enable large file size

Victor Fridyev — Thu, 28 Jul 2005 04:25:34 GMT

Hi,

AFAIK, the following must be done:
fsadm -F vxfs -o largefile /dev/vg00/rlvolX
and the file system can be mounted without the additional parameter in /etc/fstab.
HTH

Re: How to enable large file size

Simon Hargrave — Thu, 28 Jul 2005 04:26:57 GMT

the largefiles option in fstab technically isn't required. this won't enable largefiles on a filesytem without it enabled. all it will do is ensure that if a filesystem doesn't have largefiles enabled it won't mount it.

a filesystem that has been fsadm'd to enable largefiles will still support largefiles even if it's not specified explicitly in fstab.

Re: How to enable large file size

walter crasto_1 — Thu, 28 Jul 2005 04:32:55 GMT

Hi,

Thanks for so many replies.
One quick question is that, if I run " fsadm -o largefiles" option on my rvol4 then will my existing data will lost ? Because it's mine /opt partitioned & I want to use this for testing purpose.

Regards
Varian

Re: How to enable large file size

Simon Hargrave — Thu, 28 Jul 2005 04:46:55 GMT

Your files will not be lost, it will simply enable support for an extra inode level.

Of course it goes without saying that you should ensure you have a full backup of the filesystem before performing this or any filesystem administration task.

Re: How to enable large file size

walter crasto_1 — Thu, 28 Jul 2005 04:56:28 GMT

Thanks Simon,

I gave following command,
"fsadm -F vxfs -o largefiles -r /dev/vg00/rlvol6 /opt "

But gave me error saying that /opt filesystem is not part of root inode.

Regards

Varian.

Re: How to enable large file size

Simon Hargrave — Thu, 28 Jul 2005 04:58:44 GMT

The command you want is:

fsadm -F vxfs -o largefiles /dev/vg00/rlvol6

You don't need "-r" nor "/opt" in the command line.

The filesystem needs to be unmounted too so make sure you stop any services locking the filesystem ("fuser -c /opt" will tell you the processes using it). It may be easier with /opt to use single-user mode if there are a lot of things running, though it shouldn't be essential.