On Sat, 21 Aug 2010 05:26:59 -0700 (PDT) Andrew Clegg <andrew.cl...@gmail.com> wrote: [...] > If I merge two indices with CoreAdmin, as detailed here... > > http://wiki.apache.org/solr/MergingSolrIndexes > > What happens to duplicate documents between the two? i.e. those > that have the same unique key. > > What decides which copy takes precedence? Will documents get > indexed multiple times, or will the second one just get skipped? [...]
Have not used CoreAdmin, but with MergeTool, know from personal experience that there would be duplicates created. I imagine that the same is the case for CoreAdmin as Solr/Lucene allows duplicate IDs. Regards, Gora
