Rapid Prototyping with Solr

Erik Hatcher, Lucid Imagination erik.hatcher @ lucidimagination.com, May 25, 2011

Abstract §  Got data? Let's make it searchable! This interactive

presentation will demonstrate getting documents into Solr quickly, will provide some tips in adjusting Solr's schema to match your needs better, and finally will discuss how showcase your data in a flexible search user interface. We'll see how to rapidly leverage faceting, highlighting, spell checking, and debugging. Even after all that, there will be enough time left to outline the next steps in developing your search application and taking it to production.

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My Background §  Erik Hatcher

•  Lucid Imagination §  Technical Staff

•  Co-author §  Java Development with Ant / Ant in Action (Manning) §  Lucene in Action (Manning)

•  Apache Software Foundation §  Committer – Lucene / Solr §  PMC – Lucene TLP §  Member

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Why prototype? §  Demonstrate Solr can handle your data and

searching needs; mitigate risk, learn the unknown

§  It’s quick and easy, with very little time investment

§  Immediate functional user interface impresses decision makers and target users; get buy-in •  The user interface IS the app

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Prior Art §  Hoss’ amazing ISFDB work

•  http://www.lucidimagination.com/blog/tag/isfdb/ §  Previous “Rapid Prototyping with Solr” presentations

•  Data.gov Catalog on Solr: http://www.lucidimagination.com/blog/2010/11/05/data-gov-on-solr/

•  Rich text files on Solr: http://www.lucidimagination.com/Community/Hear-from-the-Experts/Podcasts-and-Videos/Rapid-Prototyping-Search-Applications-Solr

•  CSV (conference attendee data) on Solr: http://www.slideshare.net/erikhatcher/rapid-prototyping-with-solr-4312681

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Rapid Prototyping using CSV §  Fired up Solr’s example configuration §  /update/csv

•  http://localhost:8983/solr/update/csv? commit=true&stream.file=EuroCon2010.csv&fieldnames=first,last,company,title,country&header=true&f.country.map=Great+Britain:United+Kingdom

§  Tweak configuration •  schema: domain-centric field names •  solrconfig: /browse request handler •  Template adjustments

§  Instant classic search results view, tree map visualization of facet data, and random selection of contest winners

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CSV results

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… using rich text files §  curl "http://localhost:8983 /solr/update/extract?

stream.file=/docs/file.pdf &literal.id=/docs/file.pdf

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… using Data.Gov catalog data §  /update/csv – again!

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Explaining

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Suggest

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Venn Viz

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E-commerce data §  http://bbyopen.com/ §  Product data, via easy HTTP JSON API

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Ingesting the data require 'solr’!#...!1.upto(max_pages) do |page|! puts "Processing page #{page}"! json = fetch_page(page)! ! response = JSON.parse(json, :symbolize_names=>true)! puts "Total products: #{response[:total]}" if page == 1!! mapping = {! :id => :sku,! :name_t => :name,! :thumbnail_s => :thumbnailImage,! :url_s => :url,! :type_s => :type,! :category_s => Proc.new {|prod| ! prod[:categoryPath].collect {|cat| cat[:name]}.join(' >> ')},! :department_s => :department,! :class_s => :class,! :subclass_s => :subclass,! :sale_price_f => :salePrice! }!! Solr::Indexer.new(response[:products], mapping, ! {:debug => debug, :buffer_docs => 500}).index!end!

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solr-ruby’s secret power §  Solr::Indexer.new(

source, mapping, options ).index

§  “Quacks like a duck” §  source simply #each’s §  mapping simply #[]’s

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… on Prism

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What is Prism? §  Yet another opinionated brainstorm from Erik §  https://github.com/lucidimagination/Prism §  Under the covers

•  Ruby §  because it’s beautiful

•  Sinatra §  to be lightweight and have elegant flexible routing

•  Velocity §  because it is easy to learn and use, and has powerful features, facilitates

edit/refresh work

§  Separate from Solr, Rack-savvy, allows easy coding of new routes and capabilities

§  Designed to work with any arbitrary Solr instance, and already has some basic LucidWorks Enterprise capability

§  Totally a proof-of-concept at this point – just a quick hack

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… on Solritas

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Solritas? §  Pronounced: so-LAIR-uh-toss §  Celeritas is a Latin word, translated as "swiftness" or

"speed". It is often given as the origin of the symbol c, the universal notation for the speed of light - http:// en.wikipedia.org/wiki/Celeritas

§  Technically it’s the VelocityResponseWriter (wt=velocity) •  simply passes the Solr response through the Apache

Velocity templating engine §  http://wiki.apache.org/solr/VelocityResponseWriter §  Built into Solr, available instantly out of the box at:

http://localhost:8983/solr/browse

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… on Blacklight

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Blacklight? §  http://projectblacklight.org/ §  Blacklight is a free and open source Ruby on Rails based

discovery interface (a.k.a. “next-generation catalog”) especially optimized for heterogeneous collections. You can use it as a library catalog, as a front end for a digital repository, or as a single-search interface to aggregate digital content that would otherwise be siloed.

§  Production sites: •  http://search.lib.virginia.edu/ •  http://searchworks.stanford.edu/

§  Features: •  Authentication •  Saved searches •  Bookmarks – saved result items •  Selected items – for exporting to 3rd party systems •  Customizable / extensible UI

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Prototyping Tips and Tools §  Get data into Solr in the simplest possible way

•  CSV – if it fits, it’s really nice §  Schema adjusting

•  <dynamicField name="*" type="string" multiValued="true"/> •  <copyField source="*" dest="text"/>

§  Data analysis •  Understand what Solr is doing with your fields •  Solr’s Schema Browser and /admin/luke request handler

§  UI •  /browse – easy tweaking of <solr-home>/conf/velocity/*.vm

templates

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Now what? §  Script the indexing process: full and

incremental/delta §  Work with real users on real needs §  Integrate into production systems §  Iterate on schema enhancements and

configuration tweaks §  Deploy to staging/production environments and

work at scale: collection size, real queries and volume, hardware and JVM settings

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Test §  Performance §  Scalability §  Relevance §  Automate all of the above, start baselines,

avoid regressions

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Thanks!

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