Sorry for the late reply, Mike. Yes, I am suggesting a 'best effort' here that at least allows users to attempt using older indices. We could potentially even print a warning.
On Mon, Jul 1, 2024 at 3:43 AM Michael McCandless <luc...@mikemccandless.com> wrote: > Increasing the scope/duration of backwards compatibility index support > across the board adds a big taxation and risk on ongoing development. It's > hard enough just supporting N-1 major release written indices. > > Or are we talking about the "best effort" (e.g. sandbox Codecs) that I > think Simon pursued a while back? > > Mike McCandless > > http://blog.mikemccandless.com > > > On Thu, Jun 27, 2024 at 4:39 PM Anshum Gupta <ans...@anshumgupta.net> > wrote: > >> I'm actually only considering support for 8x+ but I think the default >> codec, used by most users, should allow for 7x indexes to be read by 9x. If >> we can do this for 8x+ i.e. indexes generated with 8x being supported by 10 >> would be a good starting point as well. >> >> On Thu, Jun 27, 2024 at 1:23 PM Ishan Chattopadhyaya < >> ichattopadhy...@gmail.com> wrote: >> >>> +1, we should definitely give this a try. Do you have any particular >>> version combinations in mind that don't work for users now? On my end, I >>> see Solr 8x users who would love to use Solr 9x, but with Lucene 8x indexes >>> (previously upgraded from Lucene 7x). >>> >>> On Thu, 27 Jun 2024 at 23:17, Anshum Gupta <ans...@anshumgupta.net> >>> wrote: >>> >>>> Hi everyone, >>>> >>>> At Buzzwords and Community Over Code this last month, the topic of >>>> supporting indexes for over 2 versions came up. >>>> >>>> While there are times that require breaking compatibility, I think it >>>> would be really useful to support the indexes especially if you use a codec >>>> that doesn't have a breaking change. This would be extremely useful for >>>> users and would allow them to upgrade without the need to plan for complete >>>> reindexing. >>>> >>>> What do other folks think? >>>> >>>> -- >>>> Anshum Gupta >>>> >>> >> >> -- >> Anshum Gupta >> > -- Anshum Gupta
