On 5/6/2016 9:47 AM, Kalpana wrote: > I am trying to create a new core by merging two indexes. All of them have > the same schema and data on the cores do not have duplicates. As soon as I > do a merge I see lots of duplicates. I used this for merging : > http://localhost:8983/solr/admin/cores?action=mergeindexes&core=Sitecore_SharePoint&srcCore=sitecore_web_index&srcCore=SharePoint_All
Merging indexes happens 100% at the Lucene level. Lucene does not have the concept of a uniqueKey -- this is a concept added and enforced by Solr. Merging has zero ability to eliminate duplicates. If the same uniqueKey value is in both indexes, you will have duplicate records after merging. The documentation doesn't go into very much detail on this topic, but it DOES say that the indexes which you are merging must not include duplicate documents: https://cwiki.apache.org/confluence/display/solr/Merging+Indexes Thanks, Shawn
