There's always the IndexUpgrader, one could run the 5x version against a 4x index and have a 5x-compatible index that would then be readable by 6x OOB.
A bit convoluted to be sure. Erick On Thu, Mar 24, 2016 at 8:49 AM, Yonik Seeley <ysee...@gmail.com> wrote: > On Thu, Mar 24, 2016 at 11:45 AM, Yonik Seeley <ysee...@gmail.com> wrote: >>> I've been led to understand that 6.X (at least the Lucene part?) won't >>> be backwards compatible with 4.X data. 5.5 at least works fine with data >>> files from 4.7, for instance. > > It really doesn't seem like much changed at the lucene index-format > level from 5 to 6... > it makes one wonder how much work would be involved in allowing Lucene > 6 to directly read a newer 4.x index... maybe it's just down to > version strings in the index and not much else? > > -Yonik
