Problems with Centralized Index Search Engines

• Index is outdated immediately, dynamic data not tracked

• Wastes resources checking unchanged & unwanted data

• Hard to access databases and other sources

• "Invisible Web" or "Dark Web", also internal sources

• Large indexes require big disks, memory, network connections

• Scaling up gets harder and harder

• Dependent on a single architecture

• Security integration, personalization and other features are big server features

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Peer, Meta and Distributed Search
Infonortics Search Engines Meeting, 2002
Avi Rappoport SearchTools.com