OnLine JFS

[Brian Fitzpatrick_2]

Guys,

This may sound stupid but I can not figure it out. I have two new Itanium machines running HPUX 11.v2 (11.23). When I do a swlist I am notified that OnLIne JFS is installed. Here is my question. How do I tell if OnLine JFS is being used? If it is installed does that mean that my VXFS' are running the Online JFS or could they still be the base JFS? Is there a process to look for to identify Online JFS? Lastly I had a look at all the files in /etc/rc.conf.d to see if there was a control file in there for Online JFS but couldn't find anything, if it is not automatically used when installed how is it started up?

[Steven E. Protter]

Shalom,

Online JFS is not a service like oracle or a web server. It is a toolset that lets you do things.

It lets you extend filesystems without umounting them. It lets you defragment vxfs filesystems. It lets you freeze filesystems and take instant snapshots.

So you looked for something that would not be there. OnlineJFS is there, ready to be used, but doesn't do anything unless you tell it to.

SEP

[Geoff Wild]

Try:

/usr/sbin/vxlicrep


Should see something like:



VERITAS License Manager vxlicrep utility version 3.02.006
Copyright (C) 1996-2004 VERITAS Software Corp. All Rights reserved.

Creating a report on all VERITAS products installed on this system

-----------------***********************-----------------

License Key = XXXX-XXXX-XXXX-XXXX-XXXX-XXXX-X
Product Name = VERITAS File System
Serial Number = 1
License Type = PERMANENT
OEM ID = 4095

Features :=
HP_OnlineJFS = Enabled

CPU Count = Not Restricted
Platform = HP-UX
Version = 4.1
File Change Log = Enabled

Rgds...Geoff

[Brian Fitzpatrick_2]

Ok beautiful, thanks for the responces it helped heaps. Here is what I get when I run the command provided:


VERITAS License Manager vxlicrep utility version 3.02.006
Copyright (C) 1996-2004 VERITAS Software Corp. All Rights reserved.

Creating a report on all VERITAS products installed on this system

-----------------***********************-----------------

License Key = *************************************
Product Name = VERITAS File System
Serial Number = 1
License Type = PERMANENT
OEM ID = 4095

Features :=
HP_OnlineJFS = Enabled

CPU Count = Not Restricted
Platform = HP-UX
Version = 3.5

(obviously I removed the license key).

So what you are saying is that because Online JFS is enabled I can perform the file system maintenance like extending logical volume and file system while Online anf mounted corrrect?

[James R. Ferguson]

Hi Brian:

You wrote, "So what you are saying is that because Online JFS is enabled I can perform the file system maintenance like extending logical volume and file system while Online and mounted corrrect?"

That is correct, but there is *more* too.

You can also create snapshot filesystems and leverage additional mountoptions that bypass the UNIX buffer cache on a per-filesystem basis. See the manpages for 'mount_vxfs(1M)' and the JFS whitepaper below:

http://www.docs.hp.com/en/5576/JFS_Tuning.pdf

Regards!

...JRF...

[Bill Hassell]

Or you can run swlist to list all the HP-supplied products installed on your system:

swlist -l product | grep -i JFS

Since it is a plugin for the VxFS filesystem, it replaces commands like fsadm and mount to provide additional options. No activation at bootup is needed.

[Michael Steele_2]

# fsadm -F vxfs -D -E /mount_point