The proposal is only about keeping the ability to read file-format up to N-2. Everything that is done on top of the file format is not guaranteed and should be supported on a best-effort basis. That's an important aspect if we don't want to block innovation. So in practice that means that queries that require some specific file format or analyzers that change behaviors in major versions would not be part of the extended guarantee.
Le mer. 6 janv. 2021 à 21:53, Yonik Seeley <ysee...@gmail.com> a écrit : > On Wed, Jan 6, 2021 at 4:40 AM Simon Willnauer <simon.willna...@gmail.com> > wrote: > >> You can open a reader on an index created by >> version N-2, but you cannot open an IndexWriter on it >> > > +1 > There should definitely be more consideration given to back compat in > general... it's caused a ton of pain to users over time. > > -Yonik > > >
