Xebia Knowledge Exchange (may 2010) - NoSQL : Using the right tool for the right job
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Xebia Knowledge Exchange (may 2010) - NoSQL : Using the right tool for the right job
- 1. NoSQLUsing the right tool for the right job
- 2. www.xebia.fr / blog.xebia.fr 2 No SQL
- 3. www.xebia.fr / blog.xebia.fr 3 Not Only I / I / No SQL
- 4. www.xebia.fr / blog.xebia.fr 4 Not Only I / I / / / No SQL
- 5. www.xebia.fr / blog.xebia.fr 5 Not Only I / I / / / No SQL Relational
- 6. www.xebia.fr / blog.xebia.fr 6 Need to store some data ? Oracle SQL Server Sybase DB2 MySQL PostgreSQL
- 7. www.xebia.fr / blog.xebia.fr 7 RDBMS are great for relationalstorage !
- 8. www.xebia.fr / blog.xebia.fr 8 RDBMS may not befully trivial… …what a pity if youjustwanted a put / get store
- 9. www.xebia.fr / blog.xebia.fr 9 How to achieve scalability and highavailability with a RDMS ?
- 10. www.xebia.fr / blog.xebia.fr 10 Memcachedcan help to reduce the pressure on RDBMS
- 11. www.xebia.fr / blog.xebia.fr 11 But thiswasn’tenough for some people…
- 12. www.xebia.fr / blog.xebia.fr 12 The birth of Dynamo at Amazon.com… Temporal unavailability is acceptable Rich storage is preferred for reporting Write must ALWAYS be available Only key-value is required
- 13. www.xebia.fr / blog.xebia.fr 13 So theystarted to createtheirowndatabasethatwould match theirneeds…
- 14. www.xebia.fr / blog.xebia.fr 14 So theystarted to createtheirowndatabasethatwould match theirneeds…
- 15. www.xebia.fr / blog.xebia.fr 15 Consistent hashingspreadskeysuniformallyacross the partitions
- 16. www.xebia.fr / blog.xebia.fr 16 Shardingbringsscalability, replicationbringshighavailability
- 17. www.xebia.fr / blog.xebia.fr 17 But failuresstill have to behandledefficiently…
- 18. www.xebia.fr / blog.xebia.fr 18 In case of failure of a node, the 2 othernodes serve itsload
- 19. www.xebia.fr / blog.xebia.fr 19 In this configuration, clients know only few nodeswhichact as proxy to othernodes…
- 20. www.xebia.fr / blog.xebia.fr 20 Gossipprotocol to let everybody know node B has failed…
- 21. www.xebia.fr / blog.xebia.fr 21 Eventualconsistency… N = Number of replicas R = Number of readresponses to wait for W = Number of writeaknowledges to wait for
- 22. www.xebia.fr / blog.xebia.fr 22 The ratio between N, R and W makeseverything…
- 23. www.xebia.fr / blog.xebia.fr 23 The ratio between N, R and W makeseverything…
- 24. www.xebia.fr / blog.xebia.fr 24 The ratio between N, R and W makeseverything…
- 25. www.xebia.fr / blog.xebia.fr 25
- 26. www.xebia.fr / blog.xebia.fr 26 Key-value stores are simple…
- 27. www.xebia.fr / blog.xebia.fr 27 Several competitors…
- 28. www.xebia.fr / blog.xebia.fr 28 Riak…
- 29. www.xebia.fr / blog.xebia.fr 29 Riak…
- 30. www.xebia.fr / blog.xebia.fr 30 Document orienteddatabases are an evolution of key-value stores
- 31. www.xebia.fr / blog.xebia.fr 31 MongoDBis the leader so far… … 10gen saidthey are the « MySQL of NoSQL »
- 32. www.xebia.fr / blog.xebia.fr 32 MongoDBis the leader so far…
- 33. www.xebia.fr / blog.xebia.fr 33 MongoDBis the leader so far…
- 34. www.xebia.fr / blog.xebia.fr 34 Graph databases are great to store… graphs !
- 35. www.xebia.fr / blog.xebia.fr 35 NeoTechnologyis the leader so far with Neo4j…
- 36. www.xebia.fr / blog.xebia.fr 36 Neo4j…
- 37. www.xebia.fr / blog.xebia.fr 37 Column-orienteddatabases have a veryparticular data model…
- 38. www.xebia.fr / blog.xebia.fr 38 Cassandra Vs HBase !
- 39. www.xebia.fr / blog.xebia.fr 39 Cassandra addsSuperColumns to this model…
- 40. www.xebia.fr / blog.xebia.fr 40 Cassandra wasdeveloppedatFacebook, to store the user messages
- 41. www.xebia.fr / blog.xebia.fr 41 Nowalsoused by Digg, Twitter, Rackspace,…
- 42. What a model… www.xebia.fr / blog.xebia.fr 42
- 43. www.xebia.fr / blog.xebia.fr 43 An example…
- 44. www.xebia.fr / blog.xebia.fr 44 Cassandra Demo