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he
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t
a
t
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nd dy
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r
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s
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pa
r
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hni
que
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s
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r
i
ve
d.
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he
m
a
i
n a
im
of
t
hi
s
t
e
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hni
que
s
i
s
t
o r
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s
t
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t
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on
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a
ki
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t
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ba
s
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bl
e
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n
d a
l
s
o t
he
pe
r
f
or
m
a
nc
e
t
he
a
ppl
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c
a
t
i
on
t
o
ge
t
i
m
p
r
o
v
ed
.
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h
e
s
cal
ab
l
e al
g
o
r
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t
h
m
t
r
ack
s
t
h
e d
at
a acces
s
pa
t
t
e
r
n t
ha
t
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s
whi
c
h w
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r
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ous
e
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s
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ppl
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ng t
o
w
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c
h
ot
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r
e
que
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t
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w
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r
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ous
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nd
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l
s
o
t
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r
a
ns
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c
t
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o
n
l
ogs
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r
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a
na
l
y
s
e
d.
T
he
p
r
o
p
os
e
d
s
y
s
t
e
m
f
r
a
m
e
s
,
t
he
pa
r
t
i
t
i
on
w
hi
c
h a
r
e
f
o
r
m
e
d us
e
s
N
oS
Q
L
da
t
a
ba
s
e
t
ha
t
i
s
M
on
g
oD
B
u
s
i
ng t
hi
s
s
c
a
l
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bl
e
w
or
kl
oa
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-
dr
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t
ech
n
i
q
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e
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h
i
c
h
f
al
l
n
ei
t
h
er
u
n
d
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r
s
t
at
i
c n
o
r
d
y
n
am
i
c s
y
s
t
em
.
T
h
e t
r
an
s
ac
t
i
o
n
l
o
g
s
an
d
d
at
a acces
s
p
at
t
er
ar
e
m
oni
t
or
e
d
a
n
d
pa
r
t
i
t
i
ons
a
r
e
f
or
m
e
d
pe
r
i
o
di
c
a
l
l
y
.
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he
e
s
s
e
nt
i
a
l
c
ont
r
i
b
ut
i
ons
o
f
t
hi
s
pa
pe
r
a
r
e
s
t
r
uc
t
u
r
e
d
a
s
f
ol
l
ow
s
:
a.
T
he
de
s
i
gn of
s
c
a
l
a
bl
e
w
o
r
kl
o
ad
-
dr
i
ve
n
p
a
r
t
i
t
i
o
n
i
n
g
[
2
]
w
h
i
ch
ar
e s
t
a
n
d
o
n
d
at
a acces
s
p
at
t
er
n
a
n
d
t
r
a
ces
t
he
l
o
gs
,
a
r
e
s
t
udi
e
d
a
nd
i
m
ple
m
e
nt
e
d
i
n
M
o
ng
o
D
B
by
f
or
m
i
ng
5
pa
r
t
i
t
i
ons
.
b.
Th
e
TP
C
-
C
9 t
a
bl
e
s
a
r
e
m
a
ppe
d i
nt
o
di
f
f
e
r
e
nt
9 c
ol
l
e
c
t
i
on
s
i
n M
on
go
D
B
a
nd t
r
a
ns
a
c
t
i
o
n a
r
e
c
a
r
r
i
e
d
o
ut
on
5
p
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r
t
i
t
i
o
n
s
w
h
i
c
h
a
r
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t
a
t
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c
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l
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y
p
l
a
c
e
d
.
T
h
i
s
s
t
a
t
i
c
a
p
p
r
o
a
c
h
i
n
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r
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h
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d
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s
t
r
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b
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t
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d
t
r
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n
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c
t
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o
n
a
n
d
t
h
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p
e
r
f
o
r
m
an
ce
o
f
t
h
e
ap
p
l
i
cat
i
o
n
i
s
d
ecr
e
as
e.
c.
Th
e
TP
C
-
C 9
t
a
b
l
e
s
a
r
e
t
he
n
m
a
ppe
d i
nt
o
a
s
i
ngl
e
c
ol
l
e
c
t
i
on,
t
he
s
c
a
l
a
bl
e
w
or
kl
oa
d
-
dr
i
ve
n t
e
c
hni
q
ue
i
s
us
e
d t
o pa
r
t
i
t
i
on t
he
da
t
a
a
c
r
os
s
t
he
5
pa
r
t
i
t
i
on a
n
d t
r
a
ns
a
c
t
i
ons
a
r
e
c
a
r
r
i
e
d o
ve
r
t
h
os
e
pa
r
t
i
t
i
ons
.
T
he
s
e
w
i
l
l
r
ed
u
ce t
h
e d
i
s
t
r
i
b
u
t
e
d
t
r
an
s
act
i
o
n
.
T
h
e p
e
r
f
o
r
m
an
ce i
n
t
h
e t
er
m
s
o
f
r
e
s
p
o
n
s
e t
i
m
e i
s
l
o
w
a
n
d
t
hr
ou
g
hp
ut
of
t
he
s
y
s
t
e
m
i
s
hi
gh
a
s
c
om
pa
r
e
d
t
o
a
b
o
v
e
cas
e
.
d.
T
h
e
r
es
u
l
t
s
o
f
b
o
t
h
ab
o
v
e c
as
e ar
e
t
ak
e
n
o
n
l
o
cal
m
ach
i
n
e a
n
d
al
s
o
o
n
E
C2
i
n
s
t
an
ce t
o
c
h
ec
k
t
h
e
p
er
f
o
r
m
an
ce
o
v
er
t
h
e
cl
o
u
d
.
T
he
r
e
s
t
of
t
hi
s
pa
pe
r
i
s
a
s
f
ol
l
ow
s
.
T
he
s
e
c
t
i
on
2 i
s
t
he
ba
c
k
g
r
o
u
nd
o
f
t
he
pa
pe
r
c
o
n
s
i
s
t
of
t
he
r
e
l
a
t
e
d w
o
r
k d
one
by
t
h
e
r
es
ear
ch
es
ar
e
e
x
p
l
ai
n
ed
i
n
b
r
i
e
f
.
T
h
e
s
ect
i
o
n
3
d
es
cr
i
b
es
t
h
e cen
t
r
al
i
d
ea
o
f
t
h
e
w
o
r
k
do
ne
w
hi
c
h i
nc
l
u
de
s
de
s
i
gn
o
f
t
h
e
s
c
a
l
a
bl
e
wo
r
kl
oa
d
d
r
i
ve
n
a
l
go
r
i
t
hm
i
s
de
s
c
r
i
be
d.
A
l
s
o,
t
he
ar
ch
i
t
ect
u
r
e o
f
t
h
e p
r
o
p
o
s
ed
s
y
s
t
e
m
.
M
ap
p
i
n
g
o
f
t
h
e T
P
C
-
C t
a
b
l
e
s
i
n
t
o
Mo
n
g
oD
B
c
o
l
l
e
c
t
i
o
n
s
a
r
e
e
x
p
l
a
i
n
e
d
i
n t
he
s
e
c
t
i
o
n
4.
F
ol
l
owi
ng
s
e
c
t
i
on
5,
w
i
t
h
t
he
i
m
pl
e
m
e
nt
a
t
i
on
of
t
he
w
o
r
k.
S
e
c
t
i
o
n
6 s
t
a
t
e
s
t
he
r
e
s
ul
t
s
o
f
t
he
w
o
r
k
d
o
ne
.
F
i
n
a
l
l
y
,
s
e
c
t
i
on
C
onc
l
us
i
o
n,
f
i
na
l
i
z
e
t
he
pa
pe
r
.
2.
B
AC
K
G
RO
U
ND
D
a
t
a
p
a
r
t
i
t
i
o
n
i
n
g
m
e
a
n
s
p
h
y
s
i
c
a
l
l
y
p
a
r
t
i
t
i
o
n
i
n
g
t
h
e
d
a
t
a
b
a
s
e
w
h
i
c
h
w
i
l
l
h
e
l
p
t
o
s
c
a
l
e
o
u
t
t
h
e
da
t
a
ba
s
e
t
o
ge
t
a
va
i
l
a
bl
e
a
l
l
the
t
im
e
.
A l
ot
of
w
o
r
k i
s
d
on
e
on t
he
m
e
t
r
ic
s
f
or
da
t
a
pa
r
t
i
t
i
oni
ng t
o gi
v
e
t
he
hi
g
h
pe
r
f
o
r
m
a
nc
e
of
t
he
a
ppl
i
c
a
t
i
on t
o
be
s
c
a
l
a
bl
e
a
n
d
r
e
s
t
r
i
c
t
t
he
t
r
a
ns
a
c
t
i
ons
on
a
s
i
n
g
l
e
p
a
r
t
i
t
i
o
n
.
S
o
m
e
o
f
t
h
e
m
a
r
e
l
i
s
t
e
d
b
e
l
o
w
.
T
he
pr
ot
ot
y
pe
i
s
b
u
i
l
t
w
i
t
h
b
e
n
c
h
m
a
r
k
t
o
o
l
T
P
C
-
C
w
h
i
ch
u
s
es
O
L
T
P
t
r
an
s
act
i
o
n
f
o
r
w
e
b
ap
p
l
i
cat
i
o
n
s
.
T
h
es
e
O
L
T
P
t
r
a
n
s
act
i
o
n
r
eq
u
i
r
es
q
u
i
ck
r
e
s
p
o
n
s
e
f
r
o
m
t
h
e a
p
p
l
i
cat
i
o
n
s
i
n
r
ecen
t
t
i
m
es
.
T
P
C
-
C
be
nc
hm
a
r
k i
s
a
p
o
p
ul
a
r
be
nc
hm
a
r
k w
hi
c
h i
s
a
n
Onl
i
ne
T
r
a
ns
a
c
t
i
o
n p
r
oc
e
s
s
i
ng
w
or
kl
oa
d f
or
e
s
t
im
a
t
i
n
g t
he
p
e
r
fo
rm
a
n
c
e
o
n
d
i
ffe
re
n
t
h
a
r
d
w
a
re
a
n
d
s
o
ft
w
a
re
c
o
n
fi
g
u
ra
t
i
o
n
.
T
he
or
i
gi
na
t
o
r
S
u
di
pt
o D
a
s
ope
n up wi
t
h
t
he
t
e
c
h
ni
q
ue
E
l
a
s
T
ra
S
[4
]
w
h
i
c
h
ex
p
r
es
s
S
ch
em
a l
ev
e
l
p
a
r
t
i
t
i
o
n
i
n
g
f
o
r
g
a
i
n
i
n
g
s
c
a
l
a
b
i
l
i
t
y
.
T
h
e
i
n
t
e
n
t
b
e
h
i
n
d
s
c
h
e
m
a
l
e
v
e
l
p
a
r
t
i
t
i
o
n
i
n
g
i
s
t
o
c
o
l
l
e
c
t
a
l
i
k
e
d
a
t
a
i
n
t
o
t
h
e
s
am
e p
ar
t
i
t
i
o
n
,
as
t
h
e t
r
an
s
act
i
o
n
s
o
n
l
y
acces
s
t
h
e d
at
a
w
h
i
ch
i
s
n
ee
d
e
d
f
r
o
m
a l
ar
g
e d
at
ab
as
e.
A
m
aj
o
r
g
o
a
l
o
f
E
l
a
s
T
r
a
S
i
s
t
o
h
a
v
e
e
l
a
s
t
i
c
i
t
y
a
n
d
a
l
s
o
t
o
r
e
duc
e
c
o
s
t
o
pe
r
a
t
i
on
o
f
t
he
s
y
s
t
e
m
dur
i
ng
f
a
i
l
ur
e
.
T
he
a
ut
h
or
C
r
a
l
o C
ur
i
no
ha
s
put
f
o
r
wa
r
d,
S
c
hi
s
m
:
A
W
o
r
kl
oa
d
-
D
r
i
ve
n
A
pp
r
oa
c
h
t
o Da
t
a
ba
s
e
Re
p
l
i
c
a
t
i
o
n
a
n
d
P
a
r
t
i
t
i
o
n
i
n
g
[
7
]
t
o i
m
pr
o
ve
t
he
s
c
a
l
a
bi
l
i
t
y of
s
ha
r
e
d
n
ot
h
i
ng
di
s
t
r
i
b
ut
e
d
da
t
a
ba
s
e
s
.
I
t
i
nt
e
n
ds
t
o
d
e
p
r
e
c
a
t
e
t
h
e
d
i
s
t
r
i
b
u
t
e
d
t
r
a
n
s
a
c
t
i
o
n
s
w
h
i
l
e
m
a
k
i
n
g
b
a
l
a
n
c
e
d
p
a
r
t
i
t
i
o
n
s
.
F
o
r
t
r
a
n
s
a
c
t
i
o
n
a
l
l
o
a
d
s
g
r
a
p
h
pa
r
t
i
t
i
oni
ng
t
e
c
hni
que
i
s
us
e
d
t
o ba
l
a
nc
e
t
he
da
t
a
.
Da
t
a
i
t
e
m
s
w
hi
c
h
a
r
e
a
c
c
e
s
s
e
d i
n
gr
a
p
h
pa
r
t
i
t
i
oni
ng
by
t
he
t
r
a
n
s
a
c
t
i
o
n
s
a
r
e
k
e
p
t
o
n
a
s
i
n
g
l
e
p
a
r
t
i
t
i
on.
J
.
B
ak
er
et
al
.
,
p
r
es
e
n
t
ed
M
eg
as
t
o
r
e [
5
]
i
n
w
h
i
c
h
d
a
t
a
i
s
p
a
r
t
i
t
i
o
n
e
d
i
n
t
o
a
c
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[1]
F
ra
nc
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o Cruz
,
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ra
nc
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s
c
o M
a
i
a
,
Rui
O
l
i
ve
i
r
a
a
nd Ri
c
a
rdo V
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l
a
¸c
a
.
W
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a
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re
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a
bl
e
s
pl
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t
i
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L
.
S
A
C’14
M
a
rc
h 24
–
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e
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u,
K
ore
a
Cop
y
ri
ght
2014 A
CM
9
78
-
1
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4503
-
2469
-
4/
14/
03
,
2014
.
[2]
S
.
A
hi
rra
o a
nd
R.
Ingl
e
,
“
S
c
a
l
a
bl
e
T
r
a
ns
a
c
t
i
ons
i
n Cl
oud D
a
t
a
S
t
ore
s
,
”
J
our
nal
of
Cl
oud Com
put
i
ng: A
dv
an
c
e
s
,
Sy
s
t
e
m
s
and A
pp
l
i
c
at
i
ons
,
4:
2
1
.
D
O
I 10.
1186/
s
13677
-
015
-
0047
-
3,
2015
.
[3]
S
. P
h
an
s
al
k
ar
a
n
d
D
r
. A
. D
an
i
,
“
T
r
an
s
act
i
o
n
A
w
ar
e V
er
t
i
ca
l
P
ar
t
i
t
i
oni
ng of D
a
t
a
b
a
s
e
(T
A
V
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D
) F
or Re
s
pons
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v
e
O
L
T
P
A
ppl
i
c
a
t
i
ons
In Cl
oud D
a
t
a
S
t
ore
s
,
”
J
our
nal
of
T
he
or
e
t
i
c
al
and A
ppl
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e
d I
nf
or
m
at
i
on T
e
c
h
nol
ogy
, V
o
l
u
m
e.
59 N
o.
1,
J
a
nua
r
y
2014.
[4]
Da
s S
,
Ag
r
a
wa
l
D,
E
l
Ab
b
a
d
i
A,
“
E
l
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r
aS
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e,
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t
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l
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a
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s
e
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oud
”
.
A
CM T
r
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at
abas
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Sy
s
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(
T
O
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S
)
38(A
rt
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c
l
e
5):
1
–
45
,
201
3.
[5]
Ba
ke
r J
,
Bond C
,
Corbe
t
t
J
,
F
urm
a
n J
J
,
K
horl
i
n
A
,
L
a
rs
on J
,
L
´
e
on J
-
M
,
L
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Y
,
L
l
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y
d A
,
Y
us
hpra
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eg
as
t
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P
rovi
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c
a
l
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b
l
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,
hi
ghl
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bl
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s
t
or
a
ge
for
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s
e
r
v
ic
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s
”
.
In:
CID
R
,
V
o
l
um
e
11.
pp 223
–
234,
2011
.
[6]
M
i
gue
l
L
i
roz
-
G
i
s
t
au
, R
e
za A
k
b
ar
i
n
i
a,
E
s
t
h
er
P
aci
t
t
i
, F
ab
i
o
P
o
r
t
o
an
d
P
at
r
i
ck
V
al
d
u
r
i
e
z.
“
D
y
n
a
m
i
c
W
orkl
oa
d
-
Ba
s
e
d P
a
rt
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t
i
on
i
ng A
l
gori
t
hm
s
f
or Cont
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row
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ng D
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t
a
b
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s
e
s
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.
S
pri
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e
r
-
V
e
rl
a
g
Be
rl
i
n H
e
i
de
l
be
rg
,
2013
.
[7]
Curi
no C,
J
one
s
E
P
C,
P
opa
RA
,
M
a
l
vi
y
a
N
,
W
u E
,
M
a
dde
n S
,
Z
e
l
dovi
c
h N
,
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l
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t
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ona
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c
l
oud:
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da
t
a
ba
s
e
-
as
-
a
-
s
e
rvi
c
e
for
t
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c
l
oud
”
.
I
n:
P
r
oc
e
e
di
ngs
of
t
he
5
t
h B
i
e
nni
a
l
Conf
e
r
e
nc
e
on Inno
v
at
i
v
e
D
at
a Sy
s
t
e
m
s
R
e
s
e
ar
c
h
.
p
p
235
–
240,
2011
.
[8]
Xi
a
o
y
a
n W
a
ng
,
X
u F
a
n,
J
i
nc
hu
a
n Che
n
a
nd X
i
a
o
y
ong D
u
.
“
A
u
to
m
a
tic
D
a
ta
D
is
tr
ib
u
tio
n
in
La
r
g
e
-
s
cal
e O
L
T
P
A
ppl
i
c
a
t
i
ons
”
.
I
nt
e
r
nat
i
onal
J
ou
r
nal
of
D
at
abas
e
T
he
or
y
and
A
pp
l
i
c
at
i
on
.
V
ol
um
e
.
7,
N
o.
4,
pp.
37
-
46,
2014
.
[9]
Curi
no C,
J
one
s
E
,
Z
ha
ng
Y
,
M
a
dde
n S
,
“
S
ch
i
s
m
:
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w
orkl
o
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d
-
dri
ve
n
a
ppro
a
c
h
t
o d
a
t
a
b
a
s
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re
pl
i
c
a
t
i
on
a
nd
pa
rt
i
t
i
oni
ng
”
.
P
r
o
c V
L
D
B
E
n
d
o
w
m
en
t
.
3(1
–
2
):
48
–
57,
2010
.
[10]
Bri
a
n S
a
ue
r
a
nd
W
e
i
H
a
o,
“
H
ori
z
ont
a
l
Cl
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t
a
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s
e
P
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rt
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t
i
on
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ng w
i
t
h D
a
t
a
M
i
ni
ng T
e
c
hni
q
ue
s
”
.
12t
h A
nnu
al
IE
E
E
Cons
um
e
r
Com
m
uni
c
at
i
ons
and Ne
t
wor
k
i
ng
Conf
e
r
e
n
c
e
(
CCNC)
,
2015.
Evaluation Warning : The document was created with Spire.PDF for Python.