What is full-text search (and why you need it now)

Re:What is full-text search (and why you need it now) by diego on Wednesday December 08, 2010 @01:38PM (#1984022)

You can define arbitrary mathematical functions based on document variables stored in memory, and that you can change in real time. You can have as many of these as you want.

http://indextank.com/documentation/function-definition

(Feedback on this documentation is more than welcome, it's a work in progress!)

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Re:What is full-text search (and why you need it now) by riffraff on Wednesday December 08, 2010 @03:49PM (#1984560)

please pardon me but I still confused: why can't you do this with the standard lucene? It kind of seems like what solr does with function queries[0]. Is the difference in what the variables are?

http://wiki.apache.org/solr/FunctionQuery

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Re:What is full-text search (and why you need it now) by santip on Thursday December 09, 2010 @05:24AM (#1986889)

The main difference is that you can update the document variables without fragmenting the index. In Lucene you need to reindex the document (i.e. delete it and write a new one). If you update your relevance variables an average of 10 times per document it can get really fragmented with Lucene.

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Re:What is full-text search (and why you need it now) by riffraff on Thursday December 09, 2010 @07:54AM (#1987204)

ah, got it. The point is the document fields are updated in place instead of delete+reinsert. Seems interesting.

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