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Microsoft SharePoint 2010 Administration Cookbook by Peter Serzo

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Scaling out Search—adding a crawl database

The final component that can be scaled out with regards to search is crawler. In the topology search application page, it is broken into two items:

  • Crawl Database
  • Crawl Component

The Crawl Server comprises of the crawl component that is associated with a crawl database. Each crawl database has one or more crawl components (crawlers) to index its content. It is typically scaled out for redundancy purposes or to increase the speed of the crawl.

The crawler crawls the content sources and creates the index partition(s). Then it sends the created partition(s) to the query server(s). It does not hold the index partition. It writes details about the crawl into the crawl database. It is stateless in that it does ...

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