Talk on the Power of Elastic Search and its application in nLocate on Python Meetup - KU IT FEST, 2014

1. nLocate.co
power of
Elastic Search
Aayush Shrestha
nLocate.com | Locate things nearby
@AayushShrestha
aayushonweb@gmail.com

2. nLocate.co
n is for new
● Rethinking the Local Search
● Vendors . Products . Services .
Consumers
● Aggregation of data . Structured Content.
● Open Platform (eventually)
● Not a Google Maps/ Google Local alternative

3. nLocate.co
Our stack
Web Client
(AngularJS)
Mobile
Client
(HTML5)
Third Party
Developers
API Server
(nginx > gunicorn > Django)
Spots
(ElasticSearch)
Analytics
(ElasticSearch)
Business Portal
(Django, PgSQL)
Admin Portal
(Django, Scrapy)
● Proxy Server (nginx)
● App. Server (gunicorn)
● App. Framework (Django)
● Parsing (PyParsing)
● Client Framework
(AngularJS)
● Front-end Framework (Ionic)
● Messaging (ZeroMQ)
● Web Crawler (Scrapy)
● RDBMS (PgSQL)
● Document Database
(ElasticSearch)

4. nLocate.co
what is Elastic Search?
An enterprise level search server

5. nLocate.co
what is Elastic Search?
uses Lucene under the hood

6. nLocate.co
The Good things
● Distributed FULLTEXT Search Engine
● SCHEMALESS
● RESTful API == ‘awesomeness’
● Uses JSON not XML
● Cross-platform (built on Java)
● near RealTime Search

7. nLocate.co
The Good things(one page was not enough)
● Query DSL
● Distributed. Meant to be highly available
● Load Balancing
● Free and Open Source

8. nLocate.co
Elasticsearch in nLocate.com
● Stores our spots and addon data
○ Scalable Data storage and retrieval
○ ranking algorithm
○ Customizable and vertical specific
structured data

9. nLocate.co
Elasticsearch in nLocate.com
● Logs EVERYTHING
○ Usage Monitoring
○ KPI Monitoring
○ Ad-hoc Data Integration

10. nLocate.co
Elasticsearch in nLocate.com
● Listing a.k.a. Ranking
○ Name (shingle, exact term, gram)
○ Addon (exact term, gram)
○ Headline
○ Address and Description
○ Distance (Linear Decay)

11. nLocate.co
.. and beyond nLocate.com
● Measure our KPIs
○ No of unique users and Total Searches
● Measuring our performance
● Source of Traffic
● User behavior

12. nLocate.co
ElasticSearch superpowers
● ES Aggregation Queries
● Output to Information (highcharts for
visualization)
● Gave some steroids to ES Query DSL

13. nLocate.co
That’s all folks!
Aayush Shrestha
@AayushShrestha
fb.me/ShresthaAayush
+AayushShresthaOriginal
aayushonweb@gmail.com