JFS 3.3

[Lai Nee Shyang_1]

Hi there,


Anyone out there had tried JFS3.3? I just read that it support ACL like HFS. But not allow to use it on core filesystems like /, /usr , /var, opt.

Anyone has experience to share on JFS 3.3

Thanks.

[David Allen · Accepted solution]

Hi,

I have had some experience with JFS 3.3, but it was some time ago, so I don't know how helpful this will be, but here goes anyway.

Firstly, JFS 3.3 will only work on HPUX 11.x systems, not 10.20. You should be able to get the JFS 3.3 bundle from the 11.x application CDs or download from HP's website.

Once JFS 3.3 is installed you will need to convert the file systems which you want to use ACLs on, to the version 4 disk layout. Use the vxupgrade command to do this.

eg, vxupgrade -n 4 /mount_point

This can be done whilst the filesystem is mounted and in use (vxupgrade will freeze the filesystem for a few seconds whilst it upgrades it). Make sure you have a backup first and my advise (particularly if this is a production system) would be to make the change outside of normal working hours.

As for converting the core O/S filesystems (/, /usr, /var, /opt), the reason that you shouldn't is that these filesystems are crucial for system recovery. According to the man pages for vxupgrade, the 11.x kernel and emergency recovery media are built from an older version of JFS, which won't work with version 4 disk layout. The man page goes on to add that HPUX 11.1x systems can have the core O/S filesystems upgraded to version 4.

For further reference try the HP Knowledge Base. You can try searching for these document IDs - JFS0008, JFS0009 and JFS0017 or enter "acl vxfs" as your search pattern.

Also, if you haven't got it already, download the "JFS Access Control Lists" manual from HP's website. http://docs.hp.com

Finally, be sure to read the man page on vxupgrade, as there are a few gotcha's that I haven't talked about.

Hope this helps.

Regards,
Dave

[Holger Knoppik]

Hi !
Yes, a little bit. We prepare for CIFS/9000 and installed JFS3.3 for this. It's a bit different to HFS (lsacl/getacl). The recommendation to exclude FS like /, /usr,... is because ignite does not handle ACLs. You have to obtain special license keys for JFS3.3 from hp. hp needs the machine code (uname -i) and the model. After install, enable it by typing vxlicense -c. OS is asking you for the key. Enter key and enable JFS3.3 with vxenablef -a. Check functionality with vxlicense -p.
Additional, have a look at http://docs.hp.com/hpux/onlinedocs/os/jfs_acl.pdf.
Hope this helps a bit.
RGDS, Holger

[David Allen]

You shouldn't need a license key for JFS 3.3 as I believe it is freely available from HP. If you wish to use the OnlineJFS 3.3 product (which I think is what Holger is refering to in the previous post) then you will need to purchase it from HP (and obtain the license key, etc).

The difference between JFS 3.3 and OnlineJFS 3.3 is that the OnlineJFS product allows you to grow/shrink filesystems dynamically, defragment your disks and do online backups, as well as change the version disk layout and use ACL's on JFS filesystems

[Holger Knoppik]

Oops ! David is correct. I forgot to mention that we are using it in combination with OnlineJFS3.3... Sorry!