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Journal of Big Data

Table 4 Query Usage Matrix (QUM)

From: On K-means clustering-based approach for DDBSs design

Query/site

S1

S2

S3

S4

S5

S6

SFM

Q1

1

0

0

0

1

1

3

Q2

1

1

0

0

1

0

3

Q3

0

0

1

1

0

0

2

Q4

0

0

0

1

0

1

2

Q5

0

1

0

0

0

1

2

Q6

0

1

1

1

0

0

3

Q7

1

0

0

1

0

0

2

Q8

0

1

1

0

1

1

4

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