Option "largefiles" under cluster

[Velda]

I have a HP UX 11.23 with Oracle 10g on it, and a ServiceGuard cluster.
One of the LVOLs that is in the Service Guard cluster needs to temporarily have a "largefiles" option set on it (at the moment and in the ServiceGuard package it has a "nolargefiles" set).
I was thinking to do the following :
----------------------------
Stop the Oracle on this server.
#umount /dev/vg_xx/lvol_yy
#fsadm –F vxfs –o largefiles /dev/ vg_xx/lvol_yy
#mount /dev/vg_xx/lvol_yy /my-mount-point
Start up Oracle on the server.
Check the change.
#fsadm –F vxfs /my-mount-point
Check the system.
----------------------------
Will this work, or will there be problems for the cluster if some of its mount points are not available for some time?

[James R. Ferguson]

Hi:

With OnlineJFS (which you should have) you can enable the filesystem's 'largefiles' bit without unmounting.

Regards!

...JRF...

[Rita C Workman]

It should work, and there shouldn't be any problems for the package. What your doing as no impact on the cluster.

Rgrds,
Rita

[Jupinder Bedi]

what you are doing is correct but no need to unmount the filesystem because we are using online JFS only for this purpose.

[Matti_Kurkela]

If you don't have OnlineJFS or you *want* to unmount the filesystem for some reason, the cluster may or may not notice, depending on the package configuration.

By default, the cluster does not constantly monitor the package filesystems. But *if* filesystem monitoring has been configured to the package, unmounting the filesystem might trigger a package failover.

MK

[Velda]

The problem is I do not have a JFS (don't even ask, was NOT my idea).
So SG may or may not make problems, depending on its configuration.
Can you please tell me what configuration item is responsible for this :-)
Also a pointer to a document, if I have to change a LVOL to "largefiles" ina cluster would be very nice.
----------
Thank you for all the prompt responses!!!

[Matti_Kurkela]

These would be EMS High Availability Monitor resources. It is an optional package, so if you don't have the High Availability Monitors installed, there cannot be VG monitoring configured in Serviceguard.

http://docs.hp.com/en/B5736-90046/index.html
http://docs.hp.com/en/B5736-90046/ch02s01.html

In an older Serviceguard, or with legacy-style packages on Serviceguard A.11.18+, the thing to check would be the RESOURCE definitions in the package configuration file. Something like

RESOURCE_NAME /vg/vgName/...

In a modular-style package configuration, the keywords are the same, but no longer capitalized:

resource_name /vg/vgName/...

Use "cmgetconf -p package.txt" to get the latest version of the package configuration file in text form.

The actual configuration is in binary format; if you find an old version of package configuration in text form, you cannot be sure if it's up to date or not.

MK

[Dennis Handly]

>JRF: With OnlineJFS you can enable the filesystem's 'largefiles' bit without unmounting.

I thought I was able to do that without using OnlineJFS nor unmounting it.