Eric Evansさんの「Slideshow from Cassandra presentation @ FOSDEM 2010」 の日本語訳です。

1. Cassandra
Eric Evans
eevans@rackspace.com
@jericevans
FOSDEM
2010 2 7
Japanese translation by http://oss.infoscience.co.jp/

2. Cassandra

3. decentralized

4. 1
..
..
2
3
..
4
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8. • 7
•
• IRC 100
•
• 3 2
•

9. 1
..
..
2
3
..
4
..

10. Cassandra ...
• O(1) DHT ( )
• (Eventual consistency)
•

12. ...
•
• /
• ( )

15. • get():
• multiget():
• get slice():
•
•
• multiget slice():
• get count:
• get range slice():

16. • TimeUUID
• LexicalUUID
• UTF8
• Long
• Bytes
• ...

17. • insert(): / ( )
• batch insert(): / ( )
• remove():
• batch mutate(): batch insert()
(0.6 batch insert() )
•

18. (Consistency)
CAP (Consistency) (Availability)
(Partition tolerance) 2
• Zero
• One
• Quorum ((N / 2) + 1)
• All

19. API
• Thrift (12 )
• Ruby
• http://github.com/fauna/cassandra/tree/master
• http://github.com/NZKoz/cassandra object/tree/master
• Python
• http://github.com/digg/lazyboy/tree/master
• http://github.com/driftx/Telephus/tree/master (Twisted)
• Scala
• http://github.com/viktorklang/Cassidy/tree/master
• http://github.com/nodeta/scalandra/tree/master

20. MySQL (50GB)
• MySQL
• 300ms
• 350ms
• Cassandra
• 0.12ms
• 15ms

22. ...
•
•
•
• 1
•
•
• ( )

24. ...
•
•
•

25. 1
..
..
2
3
..
4
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26. 1: Digg
Digg
Alexa.com 98

27. Digg

28. •
•
•
•

29. •
• Cassandra
•

30. 2: Twitter
Twitter 140
Alexa.com 12

31. Twitter

32. MySQL
• ˜1,000,000 ops/s
•
•
•
•

33. 3: Facebook
Facebook
Alexa.com 2

34. Inbox Search
• 100TB
• 160
• 1 5 2

35. 4: Mahalo
Mahalo.com
Mahalo

36. MySQL
• 1,600
•
•
•

37. 1
..
..
2
3
..
4
..

38. 0.6
• batch mutate
•
• ANY
•
• I/O 64 jvm
• HH
•
•
•
•

39. 0.7
•
•
• SSTable
• SSTable
•
•
• remove key range
•
•