Experimental Assessment of Workstation Failures and

Experimental Assessment of Workstation Failures and - UTK-EECS

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Fraction of Intervals
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Fraction of Intervals
2
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Fraction of Intervals
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Lost
work
1500s
Run 1
Start = 0s
500s 1500s
down
Run 2
Start = 3600s
0
End = 8000s
End =
10750s
down
2000
4000
6000
8000
10000
Time Line (seconds)
Normal
Execution
Committing
checkpoint
Overhead
Recovering
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2
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A
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g[_1ezÙ7ilc $£lrsvl_¢wPe]È[_Rj¶awzeo_wYec]m[gtg[rgt£!eorf_¢w'§adg <e]È[_ r f
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I
50
50
50
50
50
40
40
40
40
40
30
30
30
30
30
20
20
20
20
20
10
10
10
10
10
10
0
0
0
0
Simulated
Predicted w/ Eq. 2
EF = F
EF (days)
40
0
5
10
15
20
0
F (days)
LONG
5
10
15
20
F = 30d
EI (days)
50
30
F = 20d
20
0
5
F (days)
PRINCETON
10
15
20
F (days)
CETUS
F = 10d
0
1
2
3
4
0
5
0
1
I (days)
LONG
2
3
4
0
5
0
1
2
I (days)
PRINCETON
3
4
5
I (days)
CETUS
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Predicted
1.0
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0.4
1
0.5
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0.2
0.4
0.6
0.8
1.0
30
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0.5
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30
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50
45
45
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40
40
EI (days)
50
40
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35
35
30
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30
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0.2
0.4
0.6
0.8
0.2
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20
40
60
0
0
20
40
60
0.0
0
20
40
60
0
20
40
60
1.0
32.5
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E Iopt (days)
30
0.0
C = 10m
2
37
36
35
32.0
34
31.5
E_Iopt (days)
C = 1m
EI (days)
45
Simulated
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Iopt (days)
50
50
35
34
33
30
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0.4
0.6
0.8
0.5
1.0
1.5
50
50
50
45
45
45
40
40
40
35
35
35
EI (days)
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0.2
30
0.0
0.5
1.0
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0
1
2
3
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%
1.0
I (days)
CETUS
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I (days)
PRINCETON
Ê Ê;Ü ]5ÜÌ
20
%
%
%
y
?
%
hBnH
&)(+*
λ N (failures / day)
Simulated
Predicted w/ Eq. 6
4
0.4
8
3
6
2
0.2
4
1
0
2
0
10
20
30
40
50
0.0
0
5
N
LONG
10
0
15
0
10
N
PRINCETON
20
30
N
CETUS
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