Hi Chris, > : > The fact that you need to index doc values is related to another change in > : > which we removed Lucene's FieldCache and now recommend to use doc values > : > instead. Until you reindex with doc values, you can temporarily use > : > UninvertingReader[1] to have the same behaviour as in Lucene 4.x. > : > : Is indexing doc values vs. UninvertingReader a space/time tradeoff? Or > : is the general recommendation to index doc values and only resort to an > : UninvertingReader when a full 4.x to 5.x conversion is to costly in > : terms of dev. hours? > > Using docValues is going to be better for almost every use case -- it adds > additional disk space (and some additional time spent building the index) > but saves a large amount of RAM + time when opening IndexSearchers. > > It is essetnailly a more efficient, on disk, version of FieldCache > constructed hwen building then index instead of "on the fly" the first > time it's used.
thank you for your explanation. Exactly what I was after. Best wishes, Andreas -- Codetrails GmbH The knowledge transfer company Robert-Bosch-Str. 7, 64293 Darmstadt Phone: +49-6151-276-7092 Mobile: +49-170-811-3791 http://www.codetrails.com/ Managing Director: Dr. Marcel Bruch Handelsregister: Darmstadt HRB 91940 --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
