Hello
toasters
I
encounter rather strange situation
I
have a system FAS2040 with 1 aggr of 23x450g raid group ontap
version 8.1.3p2
Every
write operation being generated on this aggregate
automatically caused a read operation
When
I try to create 100% sequential write operation using tools
such as sio_ntap or filersio
Instead
of the expected 150Mb throughput I get 100MB write and 50MB
read
On
another FAS2040 system using the same commands I get 100%
write and no reads
As
you can see
filersio
asyncio_active 0 -r 0 64k 0 15g 60 1 /vol/test/testfile
CPU
NFS CIFS HTTP Total Net kB/s Disk kB/s
Tape kB/s Cache Cache CP CP Disk OTHER FCP
iSCSI FCP kB/s iSCSI kB/s
93%
0 0 0 5 26 1 24242 118671 0
0 0s 99% 72% Fn 43% 0 0
5 0 0 24 0
90% 0 0 0 4 4 1 40959
102501 0 0 19 100% 89% Fn
43% 1 0 3 0 0 2 0
86% 0 0 0 3 3 1 23126
125022 0 0 0s 99% 69% :
59% 0 0 3 0 0 2 0
93% 0 0 0 7 1 1 28200
135740 0 0 0s 99% 97% Ff
48% 7 0 0 0 0 0 0
92% 0 0 0 6 15 1 48764
115324 0 0 0s 99% 91% Ff
52% 0 0 6 0 0 14 0
90% 0 0 0 6 16 1 36148
156492 0 0 0s 99% 83% Ff
56% 0 0 6 0 0 14 0
95% 0 0 0 0 4 4 32784
114555 0 0 0s 99% 77% Fs
48% 0 0 0 0 0 0 0
92% 0 0 0 18 90 12 34931
104059 0 0 0s 99% 88% Fn
42% 0 0 18 0 0 79 0
88% 0 0 0 8 3 1 20463
124800 0 0 0s 100% 83% Fn
45% 5 0 3 0 0 2 0
89% 0 0 0 2 2 1 34050
112166 0 0 0s 99% 87% Fn
44% 0 0 2 0 0 1 0
92% 0 0 0 3 7 1 33025
112816 0 0 0s 99% 88% Fn
46% 0 0 3 0 0 5 0
91% 0 0 0 3 3 1 30929
130833 0 0 0s 100% 73% :
50% 0 0 3 0 0 2 0
92% 0 0 0 7 24 2 36484
134260 0 0 0s 100% 98% Ff
50% 0 0 7 0 0 22 0
86% 0 0 0 6 1 1 38608
125140 0 0 0s 99% 90% Ff
44% 5 0 1 0 0 1 0
93% 0 0 0 4 3 1 28748
104544 0 0 0s 100% 75% Ff
43% 0 0 4 0 0 2 0
87% 0 0 0 5 18 1 28128
158608 0 0 0s 100% 90% Fs
55% 0 0 5 0 0 17 0
93% 0 0 0 2 3 34 33115
104980 0 0 0s 99% 85% Fn
41% 0 0 2 0 0 1 32
84% 0 0 0 5 28 7 37185
109425 0 0 0s 100% 78% Fn
48% 0 0 5 0 0 21 0
91% 0 0 0 9 3 1 30224
118322 0 0 0s 99% 97% Fn
47% 7 0 2 0 0 1 0
89% 0 0 0 2 3 4 27649
118335 0 0 0s 99% 88% :
45% 0 0 2 0 0 1 0
CPU NFS CIFS HTTP Total Net kB/s Disk
kB/s Tape kB/s Cache Cache CP CP Disk OTHER
FCP iSCSI FCP kB/s iSCSI kB/s
in out read write read write age hit time
ty util in out in out
88% 0 0 0 14 57 39 43284
133480 0 0 0s 100% 98% Ff
50% 0 0 14 0 0 52 0
92% 0 0 0 2 6 16 47936
109432 0 0 0s 99% 86% Ff
46% 0 0 2 0 0 1 0
88% 0 0 0 23 86 3 45340
141014 0 0 0s 99% 73% Ff
55% 3 0 20 0 0 82 0
92% 0 0 0 10 5 4 21787
123980 0 0 0s 99% 80% Fn
44% 7 0 3 0 0 1 0
95% 0 0 0 2 4 3 34751
98158 0 0 0s 99% 82% Fn
44% 0 0 2 0 0 1 0
91% 0 0 0 1 3 1 35022
118549 0 0 0s 100% 60% Fn
48% 0 0 1 0 0 0 0
92% 0 0 0 87 3 1 25455
123066 0 0 0s 100% 80% Fn 47%
84 0 3 0 0 1 0
83% 0 0 0 8 32 2 36956
121303 0 0 0s 100% 88% :
46% 0 0 8 0 0 30 0
85% 0 0 0 5 2 1 62064
140088 0 0 0s 100% 92% Ff
59% 5 0 0 0 0 0 0
95% 0 0 0 3 3 1 39352
117364 0 0 0s 99% 71% Ff
48% 0 0 3 0 0 2 0
94% 0 0 0 3 3 1 42008
136943 0 0 0s 99% 94% Fs
53% 0 0 3 0 0 2 0
92% 0 0 0 0 2 7 26147
111286 0 0 0s 99% 58% Fn
44% 0 0 0 0 0 0 0
90% 0 0 0 3 3 1 29567
110665 0 0 20 99% 87% Fn
44% 0 0 3 0 0 1 0
90% 0 0 0 9 4 1 40031
111273 0 0 16 99% 86% Fn
43% 5 0 4 0 0 2 0
84% 0 0 0 0 1 1 36760
105709 0 0 0s 100% 84% Fn
43% 0 0 0 0 0 0 0
92% 0 0 0 3 3 1 31033
137891 0 0 0s 100% 99% :
53% 0 0 3 0 0 2 0
83% 0 0 0 4 6 1 32991
140148 0 0 0s 100% 89% F
51% 0 0 4 0 0 5 0
Any
thoughts why this could happens ?
Nothing
else is running on this netapp except for this test
Thanks
Alon
Z