topic Re: largefiles in Operating System - HP-UX

largefiles

Jun Zhang_4 — Thu, 08 Jan 2004 10:34:40 GMT

Can I add the largefiles option to a vxfs file system without deleting the lvol and recreate it? and how?

Jun Z

Re: largefiles

Jun Zhang_4 — Thu, 08 Jan 2004 10:36:44 GMT

I don't have OnlineJFS.

Re: largefiles

Steven E. Protter — Thu, 08 Jan 2004 10:37:31 GMT

large files is enabled when creating the filesystem.

newfs -F vxfs -o largefiles /dev/vg00/rlvol12

for example

It can be enabled after the fact with fsadm command

On 11.00 and earlier largefiles is an option that must be included in /etc/fstab

It can not be included in mount options of 11.11 and up.

SEP

Re: largefiles

G. Vrijhoeven — Thu, 08 Jan 2004 10:37:44 GMT

Hi,

With fsadm -F vxfs -o largefiles /mountpoint you can turn it on online.

Gideon

Re: largefiles

Pete Randall — Thu, 08 Jan 2004 10:40:21 GMT

As Gideon states, you can do it online whether you have OnlineJFS or not.

Pete

Re: largefiles

Todd McDaniel_1 — Thu, 08 Jan 2004 10:45:34 GMT

You only need JFS license for the advanced features like:

convosync, mincache, etc...

You will also need to add and entry to your /etc/fstab at the end of the line just before the numbers for your mountpoint.

/dev/vg00/lvol /mount/point vxfs largefiles 0 2

Re: largefiles

Ralph Haefner — Thu, 08 Jan 2004 10:45:39 GMT

Hello,

I'm a real newbie at HP/UX, but I've worked on Solaris for years, so please excuse my ignorance of some HP specifics. I know I've done this on a Solaris machine before, so I'd expect it to work the same. Please verify that what I say below is correct on your system by checking manpages or usage statements just to be sure it isn't different.

There is a command in /opt/VRTSvxfs/sbin named fsadm. You can change the filesystem options using that. The syntax would be:

fsadm -F vxfs -o largefiles /path/to/mountpoint

Make sure after you run it that the correct flags appear in your /etc/vfstab (or the HP/UX equivalent) so that it keeps the largefiles setting after booting. I can't remember if it made the change permanent that way or not.

And as always, I'd recommend trying it on a test box before messing with filesystem settings on a live production box, especially when your info came from some Solaris guy :-)

Re: largefiles

Ralph Haefner — Thu, 08 Jan 2004 10:47:11 GMT

Holy cow! I respond 11 minutes after the post and still 5 people beat me to it!

Obviously, you should do what they said and ignore mine. Sounds like exactly the same procedure, but they have the information specific to HP that I didn't know.

Re: largefiles

Jun Zhang_4 — Thu, 08 Jan 2004 10:56:25 GMT

I did,
fsadm -F vxfs -o largefiles /dirname
added largefiles to the fstab entry
umount /dirname
mount /dirname

smoothly.

Before copying a file larger than 2GB, is there a way to show that filesystem is OK, with the largefile attribute, or I don't need to?

Jun Z

Re: largefiles

Todd McDaniel_1 — Thu, 08 Jan 2004 10:56:41 GMT

hehe Ralph you gotta be faast here!!

no points here please...

Re: largefiles

Patrick Wallek — Thu, 08 Jan 2004 10:59:48 GMT

If you want to verify that the filesystem is largefiles enabled you can just do a:

# fsadm /mount_point

Re: largefiles

Robert-Jan Goossens — Thu, 08 Jan 2004 11:00:40 GMT

Hi Jun,

run ths command,

# fsadm -F vxfs /your_mount_point

Regards,
Robert-Jan

Re: largefiles

G. Vrijhoeven — Thu, 08 Jan 2004 17:22:05 GMT

Hi,

Aside from the fsadm command you can use the newfs -F vxfs -m /dev/vgname/lvol name and it will display the setup also.

Regards,

Gideon