Poor performance on a 3320 disk array
Hello ,
using iostat I am getting the following outputs :
us sy wt id
0 8 0 91
extended device statistics
r/sw/skr/skw/s wait actv wsvc_t asvc_t %w %b device
0.00.20.00.1 0.0 0.00.015.200 c0
0.00.00.00.0 0.0 0.00.00.000 c0t1d0
0.00.00.00.0 0.0 0.00.00.000 c0t2d0
0.00.00.00.0 0.0 0.00.00.000 c0t3d0
0.00.20.00.1 0.0 0.00.015.200 c0t0d0
52.028.6 23927.6 23781.6 0.0 4.10.051.50 192 c2
1.428.411.2 23781.5 0.0 2.50.082.40 100 c2t0d0
50.60.2 23916.40.1 0.0 1.70.033.40 92 c2t0d1
0.00.00.00.0 0.0 0.00.00.000 rt-storage:vold(pid459)
Thu Oct 12 11:42:28 2006
cpu
us sy wt id
0 7 0 93
extended device statistics
r/sw/skr/skw/s wait actv wsvc_t asvc_t %w %b device
0.00.40.00.3 0.0 0.00.09.500 c0
0.00.00.00.0 0.0 0.00.00.000 c0t1d0
0.00.00.00.0 0.0 0.00.00.000 c0t2d0
0.00.00.00.0 0.0 0.00.00.000 c0t3d0
0.00.40.00.3 0.0 0.00.09.500 c0t0d0
48.033.8 21957.3 22077.8 0.0 5.10.062.70 189 c2
1.433.811.2 22077.8 0.0 3.50.098.60 99 c2t0d0
46.60.0 21946.10.0 0.0 1.70.035.60 90 c2t0d1
0.00.00.00.0 0.0 0.00.00.000 rt-storage:vold(pid459)
what I am doing is copying some 10G of large files ( 300MB+) from one raid volume of the array to the other one.
here are the values of the mkfs :
bash-3.00# mkfs -m /dev/dsk/c2t0d0s0
mkfs -F ufs -o nsect=128,ntrack=48,bsize=8192,fragsize=1024,cgsize=16,free=1,rps=90,nbpi=8155, opt=t,apc=0,gap=0,nrpos=8,maxcontig=128,mtb=n /dev/dsk/c2t0d0s0 1140798464
bash-3.00# mkfs -m /dev/dsk/c2t0d1s0
mkfs -F ufs -o nsect=128,ntrack=48,bsize=8192,fragsize=1024,cgsize=16,free=1,rps=90,nbpi=8155, opt=t,apc=0,gap=0,nrpos=8,maxcontig=64,mtb=n /dev/dsk/c2t0d1s0 1140798464
