fstab - vxfs defaults

[Daniel D.B. Shafer Sr.]

The manpages on mkfs_vxfs(1M), concerning [no]largefiles, indicate the following: "The default is nolargefiles, although the default may change in the future."

Is this still the case for 11.0 or has the future arrived? In other words, is an entry in fstab of...
/dev/vg02/lvol1 /dba vxfs delaylog 0 2
...sufficient for [oracle's] largefiles?

[Michael Tully]

It is still the same for 11 and 11i. You need to specify the largefiles option, when creating the filesystem. If you have 'on-line JFS' you can actually change this flag without any outages.

[Ian Kidd_1]

I use the largefiles option in 11.00. As for the "future", I believe the default is still nolargefiles on 11.11

[James R. Ferguson]

Hi Daniel:

No, the default for 'largefiles' remains "nolargefiles" through all availale HP-UX versions [11i version 1.6 begin the latest) when a 'mkfs_fxfs' is done.

'fsadm' sets or resets the ability to create largefiles (>2GB) [q.v. fsadm_vxfs(1M) ]. The VxFS filesystem version must be three (3) or four (4) to enable largefiles.

Regards!

...JRF...

[James R. Ferguson · Accepted solution]

Hi Daniel:

I should hasten to add the the enablement of 'largefiles' is not controlled by a mount option in /etc/fstab, but rather by the largefiles bit which is set during creation of the filesystem with 'mkfs_vxfs' or conversion of the filesystem (with 'fsadm'). The mount option enforces the underlying state. That is, if "nolargefiles" are specified at mount-time, yet "largefiles" are present, the filesystem will not be mounted.

The original "Large Files White Paper" discusses this nicely:

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

Regards!

...JRF...

[Ravi_8]

Hi,
default largefiles is not enabled in 11x. which we can enable during file system creation. your entry for oracle file system in fstab is sufficient