Performance problem (I/O)

From: Fredrik (paltskallen_at_hotmail.com)
Date: 03/15/04 

Date: 15 Mar 2004 05:27:35 -0800

Hello!

We have a advfs filesystem with ~ 8 million small files and it is
still growing.
This all is in a SAN, HSG80 with striped disks.

The weekly networker fullbackup takes about 20 hours and it seems that
it is the os that is waiting for io.
It is also lsm mirrored between two different SAN's
The tar command takes about the same time so it seems that it not a
networker problem.

output from collect:
# DISK Statistics
#DSK NAME B/T/L R/S RKB/S W/S WKB/S AVS AVW ACTQ WTQ
%BSY
   0 dsk19 - 136 1091 176 1467 5.27 30.76 1.65 3.87
76.69
   1 dsk7 - 136 1097 174 1457 4.94 25.20 1.54 3.14
79.09

Anybody has any tips, clues how to speed it up or what the problem is?