Hi Simon, thanks a lot for your good explanation.
Best wishes, Bernd Am 03.01.2011 13:51, schrieb Simon Willnauer: > Hey Bernd, > > On Mon, Jan 3, 2011 at 1:35 PM, Bernd Fehling > <bernd.fehl...@uni-bielefeld.de> wrote: >> Dear list, >> >> some questions about the names of the index files. >> With an older Lucene/Solr 4.x version from trunk my index looks like: >> _2t1.fdt >> _2t1.fdx >> _2t1.fnm >> _2t1.frq >> _2t1.nrm >> _2t1.prx >> _2t1.tii >> _2t1.tis >> segments_2 >> segments.gen >> >> With a most recent version from trunk it looks like: >> _3a9.fdt >> _3a9.fdx >> _3a9.fnm >> _3a9_0.frq >> _3a9.nrm >> _3a9_0.prx >> _3a9_0.tii >> _3a9_0.tis >> segments_4 >> segments.gen >> >> Why is there an "_0" at some files? >> Is it from Lucene or from Solr or a fault in my system? > > lucene 4.0 as you might know has the ability to plug in a Codec which > has full control over how postings are stored, which format is used > and what files are written. Each Field within a segment can have its > own codec ie. field "foo" can have "Standard" and Field "bar" uses > "Pulsing" for instance. In such a case, since Pulsing is just a > wrapper around Standard - Codec, both codecs try to write the same set > of files per segment. For that reason we introduced a codec ID valid > per segment. Its is really an ordinal build from the set of codecs > used per segment. this ordinal is used to build the filenames, in your > case you only have one codec (I suppose its Standard - Codec) with the > ord "0". This ordinal is used for all files that codec writes. The > files without that ordinal (nrm, fdt, fdx and fnrm) are written by the > IndexWriter directly but the functionality behind it might be exposed > via codec sooner or later. > > So, afterall this is a lucene functionality and your system is just > fine doing the right thing! >> >> I also didn't find any information at >> http://lucene.apache.org/java/3_0_3/fileformats.html > > Its not a 3.3 feature - codecs are introduced in 4.0 aka. trunk. > > simon >> >> Both indexes are optimized, any idea? >> >> Regards, Bernd >> --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
