1. Suffix Array
Solr 2011/12/19
1

2. • (@nobu_k)
• Preferred Infrastructure (PFI FI)
•
•
• Sedue(2 )
2

3. Suffix Array
• Suffix Array(SA):
• ( ) 1
• Sedue
• SA
•
• +Sedue
• ” - ”
3

4. •
•
• ( )
• n-gram(q-gram)
•
4

5. Suffix Array
•
•
• n-gram
•
•
5

6. Suffix( )
0: mississippi
1: ississippi
2: ssissippi
3: sissippi
mississippi
4: issippi
5: ssippi
6: sippi
7: ippi
8: ppi
9: pi
10: i
6

7. Suffix Array
0: mississippi 10: i
1: ississippi 7: ippi
2: ssissippi 4: issippi
3: sissippi 1: ississippi
4: issippi 0: mississippi
5: ssippi 9: pi
6: sippi 8: ppi
7: ippi 6: sippi
8: ppi 3: sissippi
9: pi 5: ssippi
10: i 2: ssissippi
7

8. 10: i
7: ippi • mississippi ’si’
4: issippi
1: ississippi • ’si’
0: mississippi
9: pi •
8: ppi
6:
3:
sippi
sissippi
•
5: ssippi
2: ssissippi • 3 6
8

9. 10: i SA[i]:
7: ippi
4: issippi 10 7 4 1 0 9 8 6 3 5 2
1: ississippi T[i]:
0: mississippi
9: pi m i s s i s s i p p i
8: ppi
6: sippi
3: sissippi 6
5: ssippi T[SA[6]]
2: ssissippi → T[8]
→ “ppi”
9

10. (1/3)
T[i]:
1 2 3 ... n
SA
SA[i]
10

11. (2/3)
RedBull !!
1. RedBull *2
RedBull SA[i]
2.
RedBull
1 2 3 ... n
11

12. (3/3)
3.
RedBull
1 2 3 ... n
4.
( 1, 3), ( 2, 4), ( 3, 2),...,( n, 2)
12

13. • SA
• +
• /n-gram
• SA
•
13

14. SA
• (n-gram )
•
• n-gram
•
•
• “THIS IS IT”
• proximity
14

15. SA
•
•
•
•
• HDD
• ( )
•
•
15

16. •
• ( )
• SAIS
•
• HDD
• (dc3, dc7)
• Sedue Haskell C++
• @tanakh++
16

17. • ( )
•
•
• 1 100GB/day
• Sedue
• SA n-gram
• n-gram
• SA n-gram
•
17

18. HDD
• HDD
• OK
•
•
• SSD
• SSD
• Sedue 20 (80MB)
• SA[i]
18

19. VS
1. SA
•
2.
• SSD+ 500
3.
• O(N) CPU
4.
•
• malloc
19

20. • Sedue 1 56
• : 40
• : 16 (UTF-16)
• 2 3
•
• =
•
• SSD
•
20

21. SA
•
• 4(+1)
• 2-gram
•
• % OK
•
• ” ”
•
21

22. •
•
•
•
•
22

23. : groonga
• Sedue groonga
•
•
• Sedue groonga!!
23

24. :
•
•
• (http://jubat.us/)
• http://github.com/jubatus
• @JubatusOfficial
• with NTT PF
24

25. : Fluentd
• Ruby
• Treasure Data, Inc.
• @frsyuki, @kzk_mover
• Solr
• gem install fluentd
• Visit http://fluentd.org/doc/ now!!
25

26. •
26