The document discusses how to build your own search engine like Google using Apache Solr and Tika. It explains that Solr uses an inverted index and represents documents as vectors in a common term space to allow fast search across large datasets. Tika is used to extract text from different file formats. The document provides examples of how companies like Netflix use Solr for search capabilities on their websites.

1. How to build your own google ...
artur.grzadziel@gmail.com
Data Wizards
Dec 2015

2. Artur Grządziel
few words about me
email: artur.grzadziel@gmail.com
Currently: BigData and Machine Learning Leader
From Jan 2016: BigData Solution Architect at General Electric
PhD in progress at PAN (Polish Academy of Sciences) Systems Research Institute
Graduated from Warsaw University of Technology and Warsaw School of Economics
BigData & Machine Learning enthusiast focused on leveraging Big Data and Machine Learning
in real business cases
Privately, husband and father
pl.linkedin.com/in/ArturGrzadziel

3. Introduction
Data Wizards
Artur represents „Data Wizards” group – informal group of
BigData/Machine Learning/Data Science professionals located in
Poland and interested in knowledge sharing and addressing business
challenges leveraging modern BigData and Machine Learning
methods.

4. Agenda
1. Cloudera search
2. How it works?

5. MySearch
very high level architecture
Data
Source
Index

6. Cloudera search
Apache Solr and Tika
1.
Other
Sources

7. Cloudera Search
Cloudera Search is one of Cloudera's near-real-time access products.
Cloudera Search enables non-technical users to search and explore data stored
in or ingested into Hadoop and HBase. Users do not need SQL or programming
skills to use Cloudera Search because it provides a simple, full-text interface for
searching.
Cloudera Search incorporates Apache Solr, which includes Apache Lucene,
SolrCloud, Apache Tika, and Solr Cell. Cloudera Search is tightly integrated
with Cloudera's Distribution, including Apache Hadoop (CDH). Cloudera Search
provides these key capabilities:
- Near-real-time indexing
- Batch indexing
- Simple, full-text data exploration and navigated drill down
http://www.cloudera.com/content/www/en-us/documentation/archive/search/1-3-
0/Cloudera-Search-User-Guide/csug_introducing.html

8. Cloudera search
Tika
https://tika.apache.org/download.html

9. Cloudera search
Tika – image

10. Cloudera search
Tika – PDF file

11. Cloudera search
Tika – gazeta.pl

12. Cloudera search
Tika – formats
Supported Document Formats
• HyperText Markup Language
• XML and derived formats
• Microsoft Office document formats
• OpenDocument Format
• Portable Document Format
• Electronic Publication Format
• Rich Text Format
• Compression and packaging formats
• Text formats
• Audio formats
• Image formats
• Video formats
• Java class files and archives
• The mbox format
https://tika.apache.org/1.4/formats.html

13. Cloudera search
Solr – how to start it …
.binsolr start –e cloud -noprompt http://lucene.apache.org/solr/

14. Cloudera Search
Administration

15. Cloudera Search
Data
id cat name price inStock author series_t sequence_i genre_s
553573403 book A Game of Thrones 7.99 TRUE George R.R. Martin A Song of Ice and Fire 1 fantasy
553579908 book A Clash of Kings 7.99 TRUE George R.R. Martin A Song of Ice and Fire 2 fantasy
055357342X book A Storm of Swords 7.99 TRUE George R.R. Martin A Song of Ice and Fire 3 fantasy
553293354 book Foundation 7.99 TRUE Isaac Asimov Foundation Novels 1 scifi
812521390 book The Black Company 6.99 FALSE Glen Cook The Chronicles of The Black Company 1 fantasy
812550706 book Ender's Game 6.99 TRUE Orson Scott Card Ender 1 scifi
441385532 book Jhereg 7.95 FALSE Steven Brust Vlad Taltos 1 fantasy
380014300 book
Nine Princes In
Amber 6.99 TRUE Roger Zelazny the Chronicles of Amber 1 fantasy
805080481 book The Book of Three 5.99 TRUE Lloyd Alexander The Chronicles of Prydain 1 fantasy
080508049X book The Black Cauldron 5.99 TRUE Lloyd Alexander The Chronicles of Prydain 2 fantasy

16. Cloudera Search
Output format

17. Cloudera Search
Simple query

18. Cloudera Search
Simple query

19. Cloudera Search
More advanced query

20. Cloudera Search
Query with facets

21. Cloudera search
Solr – other features
The MoreLikeThis search component enables users to query for documents
similar to a document in their result list. It is achieved leveraging terms from the
original document to find similar documents in the index
The SpellCheck component is designed to provide inline query suggestions
based on other, similar, terms.
Highlighting in Solr allows fragments of documents that match the user's query
to be included with the query response.
Synonyms, stop words

22. Cloudera search
Solr – other features – geospacial search
Solr has sophisticated geospatial support, including searching within a
specified distance range of a given location (or within a bounding box),
sorting by distance, or even boosting results by the distance
http://lucene.apache.org/solr/quickstart.html

23. Cloudera Search
Common Use Cases
Cloudera Search lets your entire business explore and analyze data quickly and
easily for a variety of critical use cases all within a single platform, including:
- Threat detection
- Customer 360-degree visibility
- Improved user experience
- Interactive market segmentation
- Accessible global knowledge base
https://www.cloudera.com/content/www/en-us/products/apache-hadoop/apache-
solr.html

24. Cloudera Search
Other Use Cases
Instagram: Instagram (a Facebook company) is one of the famous sites, and it
uses Solr to power its geosearch API
WhiteHouse.gov: The Obama administration's website is inbuilt in Drupal and
Solr
Netflix: Solr powers basic movie searching on this extremely busy site
StubHub.com: This ticket reseller uses Solr to help visitors search for concerts
and sporting events.
https://www.safaribooksonline.com/library/view/scaling-apache-
solr/9781783981748/ch01s05.html

25. How it works ... ?

26. How it works … ?
Data Source – documents …
Document Content
1 John has a cat
2 John has a dog
3 Eva has a cat
4 George has a dog

27. How it works … ?
Data Source – documents … space of unique terms
Document Content
1 John has a cat
2 John has a dog
3 Eva has a cat
4 George has a dog
1 2 3 4
1 2 3 5
6 2 3 4
7 2 3 4
List of unique
words:
1. John
2. has
3. a
4. cat
5. dog
6. Eva
7. George

28. How it works … ?
Data Source – Documents … boolean search with inverted
index
Term Tot. freq.
John 2
has 4
a 4
cat 2
dog 2
Eva 1
George 1
Doc #
1
2
1
2
3
4
1
2
3
4
1
3
2
4
3
4
Dictionary Documents

29. How it works … ?
Data Source – documents as vectors
Documents
document 1 John has a cat
document 2 John has a dog
document 3 Eva has a cat
document 4 George has a dog
Space of unique terms -> John has a cat dog Eva George
vector representing doc1 -> 1 1 1 1 0 0 0
vector representing doc2 -> 1 1 1 0 1 0 0
vector representing doc3 -> 0 1 1 1 0 1 0
vector representing doc4 -> 0 1 1 0 1 0 1

30. How it works … ?
Data Source – Documents … vectors

31. Summary
1.
Other
Sources

32. Thank you
Data Wizards
E-mail: artur.grzadziel@gmail.com
Links:
• Cloudera Search:
http://www.cloudera.com/content/www/en-us/documentation/archive/search/1-
3-0/Cloudera-Search-User-Guide/csug_introducing.html
• Tika
https://tika.apache.org/
• Apache Solr
http://lucene.apache.org/solr/
https://www.cloudera.com/content/www/en-us/products/apache-
hadoop/apache-solr.html
• Vectors, Inversed Index, Frequency Matrix, etc. ...
http://courses.ischool.berkeley.edu/i202/f05/LectureNotes/202-20051108.htm