Towards a Distributed Web Search Engine
Towards a Distributed Web Search Engine
Ricardo Baeza-Yates
Yahoo! Research Barcelona, Spain
Joint work with Barla Cambazoglu, Aristides Gionis, Flavio Junqueira, Mauricio Mar?n, Vanessa Murdock (Yahoo! Research) and many other people
Web Search
Context
Web
4
Web Search
? This is one of the most complex data engineering challenges today: ?Distributed in nature ?Large volume of data ?Highly concurrent service ?Users expect very good & fast answers
? Current solution: Replicated centralized system
5
WR Logical Architecture
Web
Crawlers
6
A Typical Web Search Engine
? Caching
? result cache ? posting list cache ? document cache
? Replication ? multiple clusters
? improve throughput
? Parallel query processing
? partitioned index
? document-based ? term-based
? Online query processing
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