Riak and Ruby

•

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This document summarizes a presentation about Riak and Ruby. It discusses that Riak is an open source distributed key-value store influenced by Dynamo and the CAP theorem. It also describes using Riak with Ruby clients like riak-client and ripple to store and retrieve data, perform map-reduce queries, and model associations between objects.

Technology Education

Riak and Ruby
Grant Schoﬁeld
Developer Advocate
Basho Technologies, Inc.

basho
Friday, July 9, 2010

Grant Schoﬁeld
(@schoﬁeld)

basho

basho
Friday, July 9, 2010

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

NoSQL Includes...
•Key Value Stores
•Document Databases
•Graphing Databases
•Column Databases
•Schemaless MySQL

basho
Friday, July 9, 2010

Prevalent Now
•Memcache???
•Session Data
•Caching Data
•Complements Traditional RDBMS
•Not The Magical Unicorn, but Pony
Perhaps

basho
Friday, July 9, 2010

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

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

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

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

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

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

Consistent Hashing
node 0
node 1
2160/4
node 2
node 3

hash(<<"beer">>,<<"dns">>)

2160/2
basho
Friday, July 9, 2010

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

R Value
get(<<"beer">>,<<"dnr">>,
R=2)

(N=3)
{ok, Object}

X

basho
Friday, July 9, 2010

W Value
put(<<"beer">>,<<"dnr">>,
W=2)

(N=3)
ok

X

basho
Friday, July 9, 2010

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

Riak from Curl
Putting Data In

basho
Friday, July 9, 2010

Taking Data Out

basho
Friday, July 9, 2010

Deleting The Data

basho
Friday, July 9, 2010

Finally, Ruby Stuff

•Sean Cribbs - RDRC Training
•riak-client - basic client
•ripple - associations, ActiveModel
•Really Elegant Code

basho
Friday, July 9, 2010

riak-client
gem install riak-client

basho
Friday, July 9, 2010

riak-client
get the data

basho
Friday, July 9, 2010

riak-client
moar datas

basho
Friday, July 9, 2010

riak client
got beer

basho
Friday, July 9, 2010

riak-client
why yes, I do

basho
Friday, July 9, 2010

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

riak-client
ﬁnd me a dnr!

basho
Friday, July 9, 2010

what does the Fry have on tap?

basho
Friday, July 9, 2010

in a bottle?

basho
Friday, July 9, 2010

riak-client
ok, via ruby

basho
Friday, July 9, 2010

riak client
via ruby with map reduce

basho
Friday, July 9, 2010

riak-client
map

basho
Friday, July 9, 2010

riak-client
map and reduce

basho
Friday, July 9, 2010

ripple
gem install ripple

basho
Friday, July 9, 2010

schema design
riak_20100704

people riak_20100705
tweets
nosql_20100705

mongodb_20100705

basho
Friday, July 9, 2010

Other Features

basho
Friday, July 9, 2010

Riak as a Platform

basho
Friday, July 9, 2010

What’s Coming

basho
Friday, July 9, 2010

THANKS!
http://wiki.basho.com
riak-users@lists.basho.com
freenode #riak

basho
Friday, July 9, 2010

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Riak and Ruby

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