topic Re: large files in Operating System - HP-UX

large files

Werner Rips — Mon, 30 Dec 2002 12:13:36 GMT

I have a hpux10.20 server with lvm. How can i enable large files on logical volumes with HFS or VxFS filesystems?

Re: large files

Robert-Jan Goossens — Mon, 30 Dec 2002 12:23:02 GMT

Hi,

Here is the complete doc.

http://docs.hp.com/hpux/onlinedocs/os/lgfiles4.pdf

Robert-Jan.

Re: large files

Pete Randall — Mon, 30 Dec 2002 12:26:12 GMT

For example:

fsadm -F hfs -o largefiles /dev/vg02/lvol1

Pete

Re: large files

Werner Rips — Mon, 30 Dec 2002 12:35:17 GMT

Thank you for your very fast help
and good luck in 2003.
Werner

Re: large files

Ravi_8 — Mon, 30 Dec 2002 12:37:17 GMT

Hi,
you can't enable large files on the lvol that are already If you intend to do, you need a backup of that lvol.
remove that lvol, re-create with large 'Allow large files' (sam --> disks and file and file systems --> logical volumes --> action,choose create. In modify FS defaults choose Allow Large Files.

Re: large files

Steven E. Protter — Mon, 30 Dec 2002 14:45:09 GMT

backup the data
umount /fsname

lvremove /dev/vgxx/lvolname

(Contiguous is set to yes, you may need to adjusst. You might want to not use the -n if you want to use standard lvol names)
lvcreate -C y -n newvg01 /dev/vg01
lvextend -L 100 /dev/vg01/newvg01 /dev/dsk/c1t5d0
lvdisplay -v /dev/vg01/newvg01 | more

(If you need to mirror)
lvextend -m 1 /dev/vg01/newvg01 /dev/dsk/c1t5d0 /dev/dsk/c1t6d0
newfs -F vxfs -o largefiles /dev/vg02/roracle5

modify /etc/fstab to enable largefiles mount at boot time.

Re: large files

Pete Randall — Mon, 30 Dec 2002 14:54:51 GMT

What are you guys talking about? There's no need to re-create the file system. The fsadm command provides the ability to convert (and unconvert) on the fly. You simply have to unmount the filesystem.

Pete

Re: large files

James R. Ferguson — Mon, 30 Dec 2002 15:01:24 GMT

Hi:

There is *no* need to recreate a filesystem to *enable* largefiles capability. The 'fsadm' command can be used to convert either a HFS or VxFS filesystem to or from largefiles. The caveat is only that conversion from largefiles to no-largefiles succeeds only if no largefiles are present in the filesystem. The converse (converting from no-largefiles to largefiles) should always succeed.

The 'lvchange' command can be used for changing a logical volume from contiguous allocation to non-contiguous allocation. Again, there is no need to recreate the logical volume. The caveat in inverting the contiguous allocation policy is that a non-empty logical volume cannot be changed from non-contiguous to contiguous allocation unless it meets all the requirements for contiguous allocation in the first place. That is, physical extents are allocated in ascending order; there is no gap between physical extents within a mirror copy; and physical extents of any mirror copy all reside on a single physical volume.

Regards!

...JRF...

Re: large files

John Poff — Mon, 30 Dec 2002 15:08:58 GMT

Hi everybody,

See, it all comes down to how you ask the question. Our author asked, "How can i enable large files ..." and got a couple of different [and roundabout] ways to do it. The author could have asked, "What is the best way to enable large files ..." and maybe gotten better answers? Maybe not? :)

JP