dsmiley commented on code in PR #4472:
URL: https://github.com/apache/solr/pull/4472#discussion_r3313992912


##########
solr/solr-ref-guide/modules/indexing-guide/pages/luke-request-handler.adoc:
##########
@@ -118,3 +130,43 @@ Alternatively, to work through the Lucene native id:
 http://localhost:8983/solr/techproducts/admin/luke?fl=manu&docId=0
 
 From SolrJ, you can access /luke using the 
{solr-javadocs}/solrj/org/apache/solr/client/solrj/request/LukeRequest.html[`LukeRequest`]
 object.
+
+== Distributed Mode (multiple shards)
+
+When running in SolrCloud, the Luke handler automatically distributes requests 
across all shards in the collection, the same as search requests.
+To inspect only the receiving shard's index set `distrib=false`.

Review Comment:
   I should say, to support older clients without updating them we could also 
recommend a Solr deployment configure luke in solrconfig.xml with a default of 
distrib=false.  But I don't think that belongs on this page; that's an upgrade 
page matter.



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