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Elasticsearch (Rubyshift 2013)
Elasticsearch (Rubyshift 2013)
Elasticsearch (Rubyshift 2013)
Elasticsearch (Rubyshift 2013)
Elasticsearch (Rubyshift 2013)
Elasticsearch (Rubyshift 2013)
Elasticsearch (Rubyshift 2013)
Elasticsearch (Rubyshift 2013)
Elasticsearch (Rubyshift 2013)
Elasticsearch (Rubyshift 2013)
Elasticsearch (Rubyshift 2013)
Elasticsearch (Rubyshift 2013)
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Elasticsearch (Rubyshift 2013)

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General introduction to Elasticsearch at the RubyShift 2013 conference. …

General introduction to Elasticsearch at the RubyShift 2013 conference.

Download the source code for demos:

* http://git.io/hello-elasticsearch-ruby
* http://git.io/stackexchange-elasticsearch

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Transcript

  • 1. Karel Minařík @karmiq elasticsearch
  • 2. What is Elasticsearch?
  • 3. Elasticsearch Flexible REST API & JSON documents; API driven configuration; scripting; index aliases; … Scalable Distributed; built for cloud; … Versatile Search; analytics; storage; alerting; text clustering; NLP … Open Open source; community; plugins; …
  • 4. Demo http://git.io/hello-elasticsearch-ruby
  • 5. http://stackoverflow.com total title date author rating answers result ordering query syntax excerpt highlight
  • 6. http://stackexchange.com/sites?view=list#questions
  • 7. Schema-less is not schema-free
  • 8. Flat structure An index per model. "Common search" scenario. Cannot cross-search. users questions answers comments { "name" : "John", "location" : "..." } { "title" : "My First Question", "body" : "..." } { "title" : "My First Answer", "body" : "..." } { "body" : "Just a comment: ..." }
  • 9. Denormalized Cheap to query, expensive to update. { "title": "My first question", "body": "...", "user": { "name": "John", "location": "..." }, "comments": [ { "text": "Good question!", "user": { "name": "Robert", "location": "..." } } ] } questions answers
  • 10. Compromised denormalisation Some properties don't change (user_name). Some can either be "freezed" or we have to pay the price of the mass update (user_location). { "id" : "john", "name" : "John", "location" : "..." } myapp user question answer { "id" : 1, "title" : "My first question", "body" : "...", "user" : { "name" : "John", "location" : "..." }, "comments" : [ { "body" : "...", "user" : { ... } }, { "body" : "...", "user" : { ... } } ] } { "id" : 2, "title" : "My first answer", "parent_id" : 1, "user" : { "name" : "Robert", "location" : "..." }, "comments" : [ { "body" : "...", "user" : { ... } } ] } parent_id comment comment
  • 11. http://git.io/stackexchange-elasticsearch Demo
  • 12. thanks!

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