Re: Upgrade Codec 99 to 101 / 102

Hi,

I think the best is to check the source code of default codec of the 
upgrade version and start from there. I agree, there should possibly a 
documentation available that gives the default componenets used in the 
default codec of a given release.

Uwe

Am 09.09.2025 um 22:49 schrieb Michael Wechner:
>
> Hi
>
> With Lucene 9.12.0 I set my own custom max vector dimension using
>
> Codec codecInt8 = new Lucene99Codec() { @Override public 
> KnnVectorsFormat getKnnVectorsFormatForField(String field) { var 
> delegate = new Lucene99HnswScalarQuantizedVectorsFormat(); 
> log.info("Vector Value Type: int8, Maximum Vector Dimension: " + 
> maxDimensions); return new DelegatingKnnVectorsFormat(delegate, 
> maxDimensions); } }; and
> Codec codecFloat32 =new Lucene99Codec() {
>      @Override public KnnVectorsFormat getKnnVectorsFormatForField(String field) {
>          var delegate =new Lucene99HnswVectorsFormat();
>          log.info("Vector Value Type: float32, Maximum Vector Dimension: " +maxDimensions);
>          return new DelegatingKnnVectorsFormat(delegate,maxDimensions);
>      }
> };
>
> I am a little confused re which Codec / Vector Format classes I should use when upgrading to Lucene version 10.2.2
>
> Any hints would be much appreciated!
>
> Thanks
>
> Michael
>
>
-- 
Uwe Schindler
Achterdiek 19, D-28357 Bremen
https://www.thetaphi.de
eMail:[email protected]