Presentation is loading. Please wait.

Presentation is loading. Please wait.

Jiří Materna, Head of Research The Czech number one Internet company Seznam.cz.

Published byWalter Warner Modified over 8 years ago

Similar presentations

Presentation on theme: "Jiří Materna, Head of Research The Czech number one Internet company Seznam.cz."— Presentation transcript:

1 Jiří Materna, Head of Research The Czech number one Internet company Seznam.cz

2 www.seznam.cz Internet portal with tens of high-quality services: Web search (web search engine successfully competing with Google) Specialized search (Czech companies, e-shops) E-mail (the most popular free e-mail in the Czech market) News (covering business, politics, lifestyle, sport, whether, TV schedules, etc.) Entertainment (video and music online streaming) On-line maps (more detailed than Google maps) Sklik.cz (advertising system) And others… What is Seznam.cz @JiriMaterna

3 www.seznam.cz More than 1000 employees Revenue 2.8 billion CZK (108 mil. EUR) 2.4 million people visit Seznam.cz every day 1.5 billion crawled web pages -- 45 % English -- 37 % Czech -- 7.7 % Slovak -- 2.3 % German -- 8 % Others 500 queries per second in peak hours Seznam.cz in numbers @JiriMaterna

4 www.seznam.cz Search engine architecture @JiriMaterna

5 www.seznam.cz Query understanding Graph representation: - AND - OR - optional - other relations Query Expander @JiriMaterna

6 www.seznam.cz Search aggregators @JiriMaterna Deduplication Document sub-results SERP restrictions Caching

7 www.seznam.cz RC-Rank – Boosted regression oblivious trees Hundreds of features Our own quality measure Ranking @JiriMaterna

8 www.seznam.cz Index & Indexer @JiriMaterna Indexing: complete, daily, fresh Data structures: word barrel – stores the inverted index document barrel – stores document features title barrel – stores processed web pages content and metadata others – query site barrel, site barrel, link barrel, qds barrel, query url barrel, …

9 www.seznam.cz Hadoop, Giraffe, Yarn 50 mil. documents every day 1.5 bil. documents out of 50 bil. known documents stored duplicity detection Downloader & document database @JiriMaterna

10 www.seznam.cz Joint projects Providing our technology Sharing data (MetaCentrum) … Possible models of cooperation @JiriMaterna

11 www.seznam.cz Jiří Materna, Head of Research, jiri.materna@firma.seznam.cz Thank you for your attention. @JiriMaterna

Download ppt "Jiří Materna, Head of Research The Czech number one Internet company Seznam.cz."

Similar presentations

Wincite Knowledge Warehousing and Networking Sophisticated Simplicity.

Wincite Knowledge Warehousing and Networking Sophisticated Simplicity.
Crawling, Ranking and Indexing. Organizing the Web The Web is big. Really big. –Over 3 billion pages, just in the indexable Web The Web is dynamic Problems:

Crawling, Ranking and Indexing. Organizing the Web The Web is big. Really big. –Over 3 billion pages, just in the indexable Web The Web is dynamic Problems:
1 Presented By Avinash Gutte Under The Guidance of Mrs. Hemangi Kulkarni Department of Computer Engineering Pimpri-Chinchwad College of Engineering, Pune.

1 Presented By Avinash Gutte Under The Guidance of Mrs. Hemangi Kulkarni Department of Computer Engineering Pimpri-Chinchwad College of Engineering, Pune.
Principles of IR Hacettepe University Department of Information Management DOK 324: Principles of IR.

Principles of IR Hacettepe University Department of Information Management DOK 324: Principles of IR.
Search Engine Marketing Free Traffic for Your Web Site Paul Allen, CEO

Search Engine Marketing Free Traffic for Your Web Site Paul Allen, CEO
Information Retrieval in Practice

Information Retrieval in Practice
Google & Beyond Expert Internet Searching Tools & Strategies.

Google & Beyond Expert Internet Searching Tools & Strategies.
Web Search – Summer Term 2006 III. Web Search - Introduction (Cont.) - Jeff Dean, Google's Systems Lab:

Web Search – Summer Term 2006 III. Web Search - Introduction (Cont.) - Jeff Dean, Google's Systems Lab:
Delicious is a social bookmarking service that allows users to tag, save, manage, and share web pages. On Delicious you can; bookmark any site on the.

Delicious is a social bookmarking service that allows users to tag, save, manage, and share web pages. On Delicious you can; bookmark any site on the.
Searching The Web Search Engines are computer programs (variously called robots, crawlers, spiders, worms) that automatically visit Web sites and, starting.

Searching The Web Search Engines are computer programs (variously called robots, crawlers, spiders, worms) that automatically visit Web sites and, starting.
ISP 433/633 Week 7 Web IR. Web is a unique collection Largest repository of data Unedited Can be anything –Information type –Sources Changing –Growing.

ISP 433/633 Week 7 Web IR. Web is a unique collection Largest repository of data Unedited Can be anything –Information type –Sources Changing –Growing.
Search Engine Optimization (SEO)

Search Engine Optimization (SEO)
Overview of Search Engines

Overview of Search Engines
 Search engines are programs that search documents for specified keywords and returns a list of the documents where the keywords were found.  A search.

 Search engines are programs that search documents for specified keywords and returns a list of the documents where the keywords were found.  A search.
Reaching a Global Audience Through Search Vanessa

Reaching a Global Audience Through Search Vanessa
Ivan Lobov Fourth year student International Economics Program.

Ivan Lobov Fourth year student International Economics Program.
About me: www.ruhrseo.net Michael Braems Freelancer Online Marketing AdWords Specialist.

About me: Michael Braems Freelancer Online Marketing AdWords Specialist.
Search Engines. Internet protocol (IP) Two major functions: Addresses that identify hosts, locations and identify destination Connectionless protocol.

Search Engines. Internet protocol (IP) Two major functions: Addresses that identify hosts, locations and identify destination Connectionless protocol.
SEO AdWords Social Media Website Projects www.mk8.com.br Presents: Portal Polo Industrial.

SEO AdWords Social Media Website Projects Presents: Portal Polo Industrial.
Basic Web Applications 2. Search Engine Why we need search ensigns? Why we need search ensigns? –because there are hundreds of millions of pages available.

Basic Web Applications 2. Search Engine Why we need search ensigns? Why we need search ensigns? –because there are hundreds of millions of pages available.

Similar presentations

Ads by Google