1. Riak and Ruby
Grant Schofield
Developer Advocate
Basho Technologies, Inc.
basho
Friday, July 9, 2010

2. Grant Schofield
(@schofield)
basho
basho
Friday, July 9, 2010

3. NoSQL
•Web 2.0, Cloud, Enterprise???
•Useful Reference Point
•Not AntiSQL
•Schemaless (Mostly)
•Diverse
•Thoughtful Data (Not just a NoSQL
basho
Friday, July 9, 2010

4. NoSQL Includes...
•Key Value Stores
•Document Databases
•Graphing Databases
•Column Databases
•Schemaless MySQL
basho
Friday, July 9, 2010

5. Prevalent Now
•Memcache???
•Session Data
•Caching Data
•Complements Traditional RDBMS
•Not The Magical Unicorn, but Pony
Perhaps
basho
Friday, July 9, 2010

6. Riak
•Open Source
•Erlang
•Dynamo and CAP Theorem Influenced
•Advanced Key Value Store
•Web Shaped
•Distributed by Nature
•Ops Obsessed
•A Platform
basho
Friday, July 9, 2010

7. Dynamo Paper
•Key Value Store Built By Amazon for
Core Services
•Sacrifice Availability for Consistency
•Consistent Hashing
•Merkle Trees
•Vector Clocks
•Eventually Consistent
basho
Friday, July 9, 2010

8. CAP Theorem
Consistency, Availability,
Partition Tolerance
•Dr. Eric Brewer
•At a Given Point You Get Two of the
Three
•Riak is Tunable
•Eventual Consistency - Not an Excuse to
Lose Data
basho
Friday, July 9, 2010

9. Advanced Key
Value Store?
•Not Just PUT and GET Key/Values
•Multiple Interfaces
•Links
•Document Like
•Pluggable Backend
•Map/Reduce
•Distributed
basho
Friday, July 9, 2010

10. Web Shaped
•Biggest Distributed System Ever
•Works Like the Web
•Links
•Talks HTTP Restfully
•Load Balances Just Like Web Stuff
basho
Friday, July 9, 2010

11. Fundamentally
Distributed
•Built From The Start
•Masterless
•Homogenous
•Consistent Hashing
•Scales Horizontally
•Fault Tolerant (Hinted Handoff)
basho
Friday, July 9, 2010

12. Consistent Hashing
node 0
node 1
2160/4
node 2
node 3
hash(<<"beer">>,<<"dns">>)
2160/2
basho
Friday, July 9, 2010

13. N, R, and W
•N = Number of Replicas
•R = Number of Replicas Needed for a
Read
•W = Number of Replicas Needed for a
Write
•DW = Number of Replicas Needed for a
Durable Write
•N Configurable Per Bucket
•R and W Configurable Per Request
basho
Friday, July 9, 2010

14. R Value
get(<<"beer">>,<<"dnr">>,
R=2)
(N=3)
{ok, Object}
X
basho
Friday, July 9, 2010

15. W Value
put(<<"beer">>,<<"dnr">>,
W=2)
(N=3)
ok
X
basho
Friday, July 9, 2010

16. N=10, R/W = 2
get/put("beer", "dnr",
R/W=2)
(N=10)
{ok, Object}
X X
X
X X
X X X
basho
Friday, July 9, 2010

17. Riak from Curl
Putting Data In
basho
Friday, July 9, 2010

18. Taking Data Out
basho
Friday, July 9, 2010

19. Deleting The Data
basho
Friday, July 9, 2010

20. Finally, Ruby Stuff
•Sean Cribbs - RDRC Training
•riak-client - basic client
•ripple - associations, ActiveModel
•Really Elegant Code
basho
Friday, July 9, 2010

21. riak-client
gem install riak-client
basho
Friday, July 9, 2010

22. riak-client
get the data
basho
Friday, July 9, 2010

23. riak-client
moar datas
basho
Friday, July 9, 2010

24. riak client
got beer
basho
Friday, July 9, 2010

25. riak-client
why yes, I do
basho
Friday, July 9, 2010

26. Link Walking
http://localhost:8098/riak/beers/dnr/bars,_,1
http://localhost:8098/riak/bars/blue_note/beers,tap,1
http://localhost:8098/riak/areas/midtown/
/bars,tap,_/beers,_,1
basho
Friday, July 9, 2010

27. riak-client
find me a dnr!
basho
Friday, July 9, 2010

28. what does the Fry have on tap?
basho
Friday, July 9, 2010

29. in a bottle?
basho
Friday, July 9, 2010

30. riak-client
ok, via ruby
basho
Friday, July 9, 2010

31. riak client
via ruby with map reduce
basho
Friday, July 9, 2010

32. riak-client
map
basho
Friday, July 9, 2010

33. riak-client
map and reduce
basho
Friday, July 9, 2010

34. ripple
gem install ripple
basho
Friday, July 9, 2010

35. schema design
riak_20100704
people riak_20100705
tweets
nosql_20100705
mongodb_20100705
basho
Friday, July 9, 2010

36. basho
Friday, July 9, 2010

37. basho
Friday, July 9, 2010

38. A Model
basho
Friday, July 9, 2010

39. Other Features
basho
Friday, July 9, 2010

40. Riak as a Platform
basho
Friday, July 9, 2010

41. What’s Coming
basho
Friday, July 9, 2010

42. THANKS!
http://wiki.basho.com
riak-users@lists.basho.com
freenode #riak
basho
Friday, July 9, 2010