I'm upgrading from 2.3.1 to 3.0.0. I have 3.0.0 index readers ready to go into production and writers in the process of upgrading to 3.0.0.
I think understand the implications of http://wiki.apache.org/lucene-java/BackwardsCompatibility#File_Formats for the upgrade, but I'd love it if someone could validate my following assumptions. 1. My 2.3.1 indexes have compressed fields in them, which the 3.0.0 readers work nicely with, as expected. I should assume that my 3.0.0 readers will continue to handle 2.3.1 indexes OK. 2. Presumably Lucene all future 3.x index readers will continue to handle compressed fields and we should only anticipate Lucene 4.x choking on them. I was naively expecting my index directories to grow when my 3.0.0 index writer merged the 2.3.1 indexes and/or optimize()'d them converting them to 3.0.0. However, I don't see that. Presumably that means that.... 3. Documents added to existing 2.3.1 indexes will be added conforming to 3.0.0, but existing documents in the index will continue to have compressed content and old documents can coexist happily with the new ones, and my indexes will become a mixture of 2.3.1 and 3.0.0. 4. I should use http://lucene.apache.org/java/2_9_1/api/all/org/apache/lucene/util/Version.h tml#LUCENE_23 for the StandardAnalyzer and QueryParser in mixed indexes in 3.0.0 if I want to handle analysis consistently, or go for LUCENE_CURRENT if I want to handle the new content "better" (bearing in mind that the new content will eventually replace the old content anyhow). 5. I should use http://lucene.apache.org/java/3_0_0/api/all/org/apache/lucene/analysis/StopF ilter.html#StopFilter%28boolean,%20org.apache.lucene.analysis.TokenStream,%2 0java.util.Set%29 with enablePositionIncrements=false in mixed indexes in 3.0.0 if I want to handle analysis consistently, or go for enablePositionIncrements=true if I want to handle the new content "better" (bearing in mind that the new content will eventually replace the old content anyhow). --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
