誰でも分かるBloomFilterの基礎

1. 1
BloomFilter

2. 2
BloomFilter
BloomFilter
BloomFilter
BloomFilter

3. 3
BloomFilter
CM

4. 4
BloomFilter

5. 5
BloomFilter
1.
2.
3.

6. 6 . 1
BloomFilter
1.
2.

7. 6 . 2
BloomFilter
1.
2.
3.

8. 6 . 3
BloomFilter

9. 7
BloomFilter
CM

10. 8
BloomFilter
( )

11. 9
BloomFilter
1.
2.
3.

12. 10 . 1
BloomFilter

13. 10 . 2

14. 10 . 3

15. 10 . 4
➞
➞
or

16. 11 . 1
(0|1) m
[0 <= n < m]
k

17. 11 . 2
m
0 1 1
14 (m = 14)

18. 11 . 3
k
3 (k = 3)
[0 <= n < 14]
14

19. 12 . 1
A
: 185cm -> 185 % 14 = 3
: 77kg -> 77 % 14 = 7
: 32 -> 32 % 14 = 4

20. 12 . 2
B
: 172cm -> 172 % 14 = 4
: 55kg -> 55 % 14 = 13
: 24 -> 24 % 14 = 10
4

21. 13 . 1

22. 13 . 2
A
: 185cm -> 185 % 14 = 3
: 77kg -> 77 % 14 = 7
: 32 -> 32 % 14 = 4

23. 13 . 3
C
: 174cm -> 174 % 14 = 6
: 63kg -> 63 % 14 = 7
: 28 -> 28 % 14 = 0

24. 13 . 4
D
: 161cm -> 161 % 14 = 7
: 52kg -> 52 % 14 = 10
: 45 -> 45 % 14 = 3
D

25. 13 . 5
A B
A : 32 -> 32 % 14 = 4
B : 172cm -> 172 % 14 = 4
B 3
A 1
A
BloomFilter
Counting BloomFilter

26. 13 . 6
k seed hash
Cassandra MurMur3 Hash
m

27. 14
m k
m k

28. 15
Have a nice
BloomFilter!

29. 16