Filesystem Performance

[Shahul]

Hi,

I have to deal with filesystems which has millions of small files in it. But on my system with HPUX 11.11, JFS 3.3 and filesystem lay out version 4, any operation on these directories are taking ages. find, delete, directory listing, etc. Is there any tips anyone can give to improve the performance, other than reducing number of files?

TIA
Shahul

[Duncan Edmonstone]

Shahul,

Read the whitepaper here:

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

You may also benefit from upgrading to JFS3.5:

http://h20392.www2.hp.com/portal/swdepot/displayProductInfo.do?productNumber=BASEVXFS

If you actually have online JFS, I would plan to at lkeast do some directory defragmentation. See the man page fsadm_vxfs for details.

HTH

Duncan

[Duncan Edmonstone]

Also regardless of whether you choose to upgrade to JFS3.5 or not, make sure you have all the latest JFS patches as well. Probably the easiest way to ensure this is to install the latest quality pack for 11.11:

http://www11.itrc.hp.com/service/patch/releasePage.do?BC=main|releaseIndexPage|&releaseId=0812-11.11

HTH

Duncan

[likid0]

Hy, I had a similar case as yours, with loads of files with 11.11 and jfs3.3, and after triying many things(defraging,diferent fs on diferent disks), we upgraded to jfs3.5 and the app is going much faster, we also defrag(need onlinejfs) every week.