The document discusses the Apache Cassandra NoSQL database. It describes how Cassandra uses keys to store and retrieve data, unlike SQL databases that rely on indexes. Cassandra allows for adding secondary indexes but maintains consistency through a replication technique called versioned clocks. Later versions of Cassandra added features like configurable consistency levels and improved secondary indexing.

1. Cassandra
http:// PARTAKE.IN
Shinya Kawanaka
@mayahjp, @partakein
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2. NoSQL
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3. NoSQL RDB
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4. Thursday, December 16, 2010

5. NoSQL
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6. NoSQL
RDB
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7. Thursday, December 16, 2010

8. Thursday, December 16, 2010

9. ATND (ry
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10. [PARTAKE]
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11. Thursday, December 16, 2010

12. ( )
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13. Apache Cassandra 0.6
RDB
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14. Cassandra
(1)
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15. NoSQL
RDB
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16. Thursday, December 16, 2010

17. ( )
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18. ( )
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19. RDB
INDEX
ID TITLE BEGIN_DATE CAPACITY ……
1 2010-12-14 10 ……
2 2010-12-15 15 ……
3 2010-12-16 8 ……
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20. Cassandra
ID (KEY) TITLE BEGIN_DATE CAPACITY
1 2010-12-14 10
2 2010-12-15 15
3 2010-12-16 8
2010-12-14 ID: 1 KEY
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21. Index
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22. Thursday, December 16, 2010

23. Thursday, December 16, 2010

24. :Cassandra 0.7
Secondary Index
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25. (2)
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26. Thursday, December 16, 2010

27. Cassandra
ID (KEY) TITLE BEGIN_DATE CAPACITY
1 2010-12-14 10
2 2010-12-15 15
3 2010-12-16 8
2010-12-20
2010-12-14 ID: 1
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28. Cassandra
ID (KEY) TITLE BEGIN_DATE CAPACITY
1 2010-12-20 10
2 2010-12-15 15
3 2010-12-16 8
2010-12-14 ID: 1
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29. Cassandra
ID (KEY) TITLE BEGIN_DATE CAPACITY
1 2010-12-20 10
2 2010-12-15 15
3 2010-12-16 8
2010-12-14 ID: 1
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30. commit rollback
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31. Thursday, December 16, 2010

32. Thursday, December 16, 2010

33. Cassandra
replay
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34. Thursday, December 16, 2010

35. Thursday, December 16, 2010

36. Thursday, December 16, 2010

37. (3)
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38. Cassandra
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39. Client A Cassandra Client B
10
10
+1 10
11
+1
12
11
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40. Thursday, December 16, 2010

41. 0.8
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42. 0.7
Versioned Clock
……
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43. Versioned Clock
0.8
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44. Cassandra
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45. Thursday, December 16, 2010

46. NoSQL
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47. =
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48. Domain Specific
Database
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49. NoSQL
RDB
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50. Thursday, December 16, 2010

51. [PARTAKE]
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52. Thursday, December 16, 2010

53. [PARTAKE]
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54. Thursday, December 16, 2010

55. Thursday, December 16, 2010

56. Thursday, December 16, 2010

57. Thursday, December 16, 2010

58. Thursday, December 16, 2010

59. Thursday, December 16, 2010

60. Thursday, December 16, 2010

61. RDB
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62. http://partake.in/
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