Here is some of the history: https://issues.apache.org/jira/browse/LUCENE-652 https://issues.apache.org/jira/browse/LUCENE-1960
Glen Newton wrote: > Could someone send me where the rationale for the removal of > COMPRESSED fields is? I've looked at > http://people.apache.org/~uschindler/staging-area/lucene-3.0.0-rc1/changes/Changes.html#3.0.0.changes_in_runtime_behavior > but it is a little light on the 'why' of this change. > > My fault - of course - for not paying attention. > > thanks, > Glen > > 2009/11/17 Uwe Schindler <u...@thetaphi.de>: > >> Hello Lucene users, >> >> >> >> On behalf of the Lucene dev community (a growing community far larger than >> just the committers) I would like to announce the first release candidate >> for Lucene Java 3.0. >> >> >> >> Please download and check it out - take it for a spin and kick the tires. If >> all goes well, we hope to release the final version of Lucene 3.0 in a >> little over a week. >> >> >> >> The new version is mostly a cleanup release without any new features. All >> deprecations targeted to be removed in version 3.0 were removed. If you are >> upgrading from version 2.9.1 of Lucene, you have to fix all deprecation >> warnings in your code base to be able to recompile against this version. >> >> >> >> This is the first Lucene release with Java 5 as a minimum requirement. The >> API was cleaned up to make use of Java 5's generics, varargs, enums, and >> autoboxing. New users of Lucene are advised to use this version for new >> developments, because it has a clean, type safe new API. Upgrading users can >> now remove unnecessary casts and add generics to their code, too. If you >> have not upgraded your installation to Java 5, please read the file >> JRE_VERSION_MIGRATION.txt (please note that this is not related to Lucene >> 3.0, it will also happen with any previous release when you upgrade your >> Java environment). >> >> >> >> Lucene 3.0 has some changes regarding compressed fields: 2.9 already >> deprecated compressed fields; support for them was removed now. Lucene 3.0 >> is still able to read indexes with compressed fields, but as soon as merges >> occur or the index is optimized, all compressed fields are decompressed and >> converted to Field.Store.YES. Because of this, indexes with compressed >> fields can suddenly get larger. >> >> >> >> While we generally try and maintain full backwards compatibility between >> major versions, Lucene 3.0 has some minor breaks, mostly related to >> deprecation removal, pointed out in the 'Changes in backwards compatibility >> policy' section of CHANGES.txt. Notable are: >> >> >> >> - IndexReader.open(Directory) now opens in read-only mode per default (this >> method was deprecated because of that in 2.9). The same occurs to >> IndexSearcher. >> >> - Already started in 2.9, core TokenStreams are now made final to enforce >> the decorator pattern. >> >> - If you interrupt an IndexWriter merge thread, IndexWriter now throws an >> unchecked ThreadInterruptedException that extends RuntimeException and >> clears the interrupt status. >> >> >> >> Also, remember that this is a release candidate, and not the final Lucene >> 3.0 release. >> >> >> >> You can find the full list of changes here: >> >> >> >> HTML version: >> >> http://people.apache.org/~uschindler/staging-area/lucene-3.0.0-rc1/changes/C >> hanges.html >> >> >> >> Text version: >> >> http://people.apache.org/~uschindler/staging-area/lucene-3.0.0-rc1/changes/C >> hanges.txt >> >> >> >> Changes have also occurred in Lucene's contrib area: >> >> >> >> HTML version: >> >> http://people.apache.org/~uschindler/staging-area/lucene-3.0.0-rc1/changes/C >> ontrib-Changes.html >> >> >> >> Text version: >> >> http://people.apache.org/~uschindler/staging-area/lucene-3.0.0-rc1/changes/C >> ontrib-Changes.txt >> >> >> >> Download release candidate 1 here: >> >> http://people.apache.org/~uschindler/staging-area/lucene-3.0.0-rc1/ >> >> >> >> Be sure to report back with any issues you find! Look especially for faults >> in generification of public APIs (like missing wildcards,...). >> >> >> >> Thanks, >> >> Uwe Schindler >> >> >> >> ----- >> >> Uwe Schindler >> >> H.-H.-Meier-Allee 63, D-28213 Bremen >> >> http://www.thetaphi.de >> >> eMail: u...@thetaphi.de >> >> >> >> >> >> >> > > > > -- - Mark http://www.lucidimagination.com --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
