Well, let's start by backing up a bit. what is the problem you're trying to solve that needs cross-node joins? Trying to be sure this isn't an XY problem.
There is some work in this area, See: https://issues.apache.org/jira/browse/SOLR-7090 (not committed) and https://issues.apache.org/jira/browse/SOLR-4905 neither one really do what you want, the second one provides some capability, but there are restrictions. In essence, This Is A Hard Problem in the Solr world to make performant. You'd have to get all of the date from the "from" core across the wire to the "to" node, potentially this would be the entire corpus. you might look at some of the Streaming Aggregation stuff, that has some capabilities here too. Best, Erick On Fri, Sep 25, 2015 at 10:05 AM, Scott Blum <dragonsi...@gmail.com> wrote: > Hi team, > > Understanding the scalability limitations, I wanted to work on cross-node > joins. I've been staring at the JoinQuery code (and tried stepping through > a lot of it in a debugger) but it's been rough going to understand. > > Is there anyone who might be able to help me understand what's going on, > or offer ideas and suggestions? I asked on IRC but haven't had much luck > yet. > > Thanks! > Scott > >
