Defrag 11.i jfs procedure

[Mark A. Smith]

Whats the process to defrag a jfs file system on 11.11 ?

Are there any considerations, such as required minimum disk space, before defragging ? Can it
be done while the file system is live and in use ?

[Paul Sperry]

File system fragmentation can be reported using the â -Eâ option of the fsadm utility. File
systems can be defragmented or reorganized using the HP OnLineJFS product using the â -eâ
option of the fsadm utility.

[Sandman! · Accepted solution]

Only if you have OnlineJFS can it be done while the filesystem is mounted. For details man fsadm_vxfs.

# fsadm -F vxfs -d -D -e -E

[Paul Sperry]

File system fragmentation can be reported using the -E option of the fsadm utility. File
systems can be defragmented or reorganized using the HP OnLineJFS product using the -e
option of the fsadm utility.


Stupid Word characters sorry but I like the spell checker

[A. Clay Stephenson]

If you have the optional OnlineJFS product installed then yes, you can do it online. Man fsadm_vxfs for the required options. Now, in almost all cases the performance improvements from this operation are difficult to measure much less actually perceive. There are some exceptions but I've yet to see a performance improvement that exceeded single digit percentages.

[Mark A. Smith]

the fsadm reply answered my question on how to defrag