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Tim Smith commented on LUCENE-5940: ----------------------------------- i fully understand the reasons for wanting to change the policy here. i absolutely hate maintaining backwards compat myself. its just a nightmare and leaves lots of rotting code laying around waiting to wreak havoc and makes it dicey to add new functionality. i'm fully on board with that sentiment but, i have to support it, and do so in a seamless online manner that is not prone to user error. i also get the feeling a lot of the lucene devs in general don't think "full reindexing" is an issue and can just be done at any point with minimal cost (just a vibe i've picked up). my experience is that this can be a many months long process (slow sources). this seems to influence support for backwards compatibility, as well as support for changing configuration/schema options, for existing fields, etc by all means, create a good upgrade tool people can use. however, it won't be useful for me and i will need to find a different solution (which will likely result in slowing my adoption of 5.0 when it is released) i am in no way advocating that 5.0 should support reading 3.x indexes. again, i'm just adding my perspective here so informed people can make a decision based on all points of view if the policy changes, i will just have to adapt as necessary > change index backwards compatibility policy. > -------------------------------------------- > > Key: LUCENE-5940 > URL: https://issues.apache.org/jira/browse/LUCENE-5940 > Project: Lucene - Core > Issue Type: Bug > Reporter: Robert Muir > > Currently, our index backwards compatibility is unmanageable. The length of > time in which we must support old indexes is simply too long. > The index back compat works like this: everyone wants it, but there are > frequently bugs, and when push comes to shove, its not a very sexy thing to > work on/fix, so its hard to get any help. > Currently our back compat "promise" is just a broken promise, because we > cannot actually guarantee it for these reasons. > I propose we scale back the length of time for which we must support old > indexes. -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For additional commands, e-mail: dev-h...@lucene.apache.org