Jonathan Weiss gives an overview of the NoSQL databases. Why would you consider one, what are the tradeoffs? Given at BarCampRuhr3 2010 in Essen, Germany (Slides are English).

1. N✮SQL
Data-Storage jenseits von SQL
Jonathan Weiss, 20.03.2010
Peritor GmbH
Saturday, March 20, 2010

2. Wer?
Ruby-Entwickler
Open-Source-Contributor (http://github.com/jweiss)
@jweiss
2
Saturday, March 20, 2010

3. N✮SQL-Datenbanken?
Built for the Web
Skalierbar
Performant
Flexibles Datenschema
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Saturday, March 20, 2010

4. Riak BigTable
Lotus Notes Amazon S3
Memcached
Redis
Cassandra
MongoDB
Dynamo Dynomite
CouchDB
Amazon SimpleDB
Excel ;)
Tokyo Tyrant Neo4j
Project Voldemort HBase
4
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5. Der Status-Quo
Relationale Datenstrukturen
SQL
Transaktionssicherheit
Locking
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6. Das Problem
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7. Das Problem
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8. Die Lösung
”Simplicity is prerequisite for
reliability“
— Edsger W. Dijkstra
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9. Die Lösung
key => “value”
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10. Dokumente
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11. Dokumente
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12. Dokumente
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13. Dokumente
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14. Integrität
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15. Eventual Consistency
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16. Append-Only
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17. Append-Only
Update
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18. Append-Only
Update
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19. Skalierbarkeit
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20. Tools
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21. Tools
Riak BigTable
Lotus Notes Amazon S3
Memcached
Redis
Cassandra
MongoDB
Dynamo Dynomite
CouchDB
Amazon SimpleDB
Excel ;)
Tokyo Tyrant Neo4j
Project Voldemort HBase
18
Saturday, March 20, 2010

22. Tools
Riak BigTable
Lotus Notes Amazon S3
Memcached
Redis
Cassandra
MongoDB
Dynamo Dynomite
CouchDB
Amazon SimpleDB
Excel ;)
Tokyo Tyrant Neo4j
Project Voldemort HBase
19
Saturday, March 20, 2010

23. Redis
Simpler Key-Value-Store
Speichert Strings, Listen und Sets
Persistenz über Snapshots oder Append-Logs
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24. Redis
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25. Redis
set foo 4
1000
+OK
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26. Redis
set foo 4
Request
1000
+OK Response
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27. Scaling
Master-Slave
mittels Snapshots
Multiple Master
mittels Hash Ring
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28. Einsatz-Szenarien
Persistenter Cache
Session-Store
Realtime-Data: Monitoring, Trading, ...
Shared State
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29. CouchDB
relax
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30. CouchDB
Dokument-orientiert
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31. ”CouchDB is built of the Web“
— Jacob Kaplan-Moss
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32. CouchDB Document
{
"_id": "BCCD12CBB",
"_rev": "1-AB764C",
"type": "person",
"name": "Darth Vader",
"age": 63,
"headware": ["Helmet", "Sombrero"],
"dark_side": true
}
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33. CouchDB Document
{
"_id": "BCCD12CBB",
"_rev": "1-AB764C",
"type": "person",
"name": "Darth Vader",
"age": 63,
"headware": ["Helmet", "Sombrero"],
"dark_side": true
}
29
Saturday, March 20, 2010

34. CouchDB Document
{
"_id": "BCCD12CBB",
"_rev": "1-AB764C",
"type": "person",
"name": "Darth Vader",
"age": 63,
"headware": ["Helmet", "Sombrero"],
"dark_side": true
}
30
Saturday, March 20, 2010

35. CouchDB - CRUD
Erstellen/Aktualisieren:
PUT /starwars/BCCD12CBB
Lesen:
GET /starwars/BCCD12CBB
Löschen:
DELETE /starwars/BCCD12CBB
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36. CouchDB
Wie komme ich an meine Daten?
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37. CouchDB
Views!
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38. CouchDB
function(doc) {
if (doc.headware) {
for (var hat in doc.headware) {
emit(hat, 1);
}
}
}
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39. CouchDB
function(keys, values, rereduce) {
return sum(values);
}
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40. Libraries
SimplyStored: Ruby wrapper Models
Associations
Callbacks
Validations
Dynamic finder
S3 attachments
Paranoid delete
http://github.com/peritor/simply_stored
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41. Libraries
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42. B-Tree
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43. Crash-Proof
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44. Offline by default
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45. Replication
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46. CouchDB
POST /_replication
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47. Und?
Daten sind wieder König
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48. Aber!
Kein goldener Hammer
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49. 45
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50. 46
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51. Peritor
Cloud-Management und -Deployment made easy
http://scalarium.com
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52. Peritor GmbH
Blücherstr. 22, Hof III Aufgang 6
10961 Berlin
Tel.: +49 (0)30 69 20 09 84 0
Fax: +49 (0)30 69 20 09 84 9
Internet: www.peritor.com
E-Mail: info@peritor.com
© Peritor GmbH - Alle Rechte Vorbehalten
Saturday, March 20, 2010