topic Re: Disk Defragmentation in Operating System - HP-UX

Disk Defragmentation

hpuxhelp — Tue, 17 Dec 2002 20:02:00 GMT

Does anyone know on how to do this? I 'm trying to understand this ulitity. What is AdvFs ??

Re: Disk Defragmentation

Pete Randall — Tue, 17 Dec 2002 20:09:37 GMT

Assuming you have a VxFS file system (or journalled file system), you can defrag it with a command like this:

for i in `bdf -l |grep -v Filesystem |awk '{ print $6 }'`
do
if [ $i != "/stand" ]; then
fsadm -F vxfs -d -D -e -E $i
fi
done

There is a product called Online JFS which adds additional features the base JFS product, like online re-sizing.

Pete

Re: Disk Defragmentation

hpuxhelp — Tue, 17 Dec 2002 20:19:34 GMT

I do not online JFS therefore, fsadm can't be use. Is there a man page on this so I can read it. What does AdvFs stabd for?? Advance Filesystem???

Re: Disk Defragmentation

George Abraham_1 — Tue, 17 Dec 2002 20:21:00 GMT

hi Dido

Online JFS is a wonderful tool, which helps you to increase the filesystem size online...without unmounting the filesystem.

To install it you need a codeword, Comes with the first of the applications CD..

cheers
George

Re: Disk Defragmentation

Pete Randall — Tue, 17 Dec 2002 20:25:55 GMT

Sorry, I'm not sure what AdvFS might be. I thought maybe you were referring to Online JFS, but I guess not.

There is a man page for fsadm, if that's what you mean. If you're looking for info on Online JFS, try here:

http://www.docs.hp.com/cgi-bin/fsearch/framedisplay?top=/hpux/onlinedocs/5187-1878/5187-1878_top.html&con=/hpux/onlinedocs/5187-1878/00/00/6-con.html&toc=/hpux/onlinedocs/5187-1878/00/00/6-toc.html&searchterms=JFS&queryid=20021217-132349

Pete

Re: Disk Defragmentation

hpuxhelp — Tue, 17 Dec 2002 20:55:28 GMT

I find out that advfs is the local filesystem and utilities option on tru64 unix os ...on hp we are using online JFS...
thanks for your help...

Re: Disk Defragmentation

Chris Vail — Thu, 19 Dec 2002 14:16:33 GMT

Many moons ago, Digital Equipment Company purchased a license of VxFS from Veritas, and developed it on their own. DEC was bought out by Compaq, and we all know that Compaq was bought out by HP. This is known as AdvFS, and will be incorporated into future releases of HP/ux. Its not currently available as far as I know, except perhaps as a beta release. Expect it sometime next year, however. HP doesn't want to license a product that it already owns.

Chris

Re: Disk Defragmentation

fengliang hu — Thu, 19 Dec 2002 18:00:22 GMT

AdvFs is quite different from other Unix file systems of the type journaling or traditional ufs. A file system can have multiple volumes and those volumes can be configured or extended to mirror/stripe/concatenation.

There are also a few differences between Tru64 disk group and HP-UX/AIX LVM or VxVM. The disk groups in Tru64 may share disks while almost all the other volume managers must have exclusive disks in a disk group.

Re: Disk Defragmentation

Steven E. Protter — Thu, 19 Dec 2002 22:35:25 GMT

I have heard that since HP now owns AdvFS, it will probably be ported to HP-UX, but not for a while.

I have always been told that file fragmentation is not an issue with jfs. Am I wrong?

Steve