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Mention how CCR can help optimize indexing throughput. (#54870)

Adrien Grand 5 years ago
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      docs/reference/ccr/index.asciidoc

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docs/reference/ccr/index.asciidoc

@@ -10,6 +10,7 @@ cases:
 * Disaster recovery in case a primary cluster fails. A secondary cluster can
   serve as a hot backup
 * Geo-proximity so that reads can be served locally
+* Prevent search load from interfering with indexing by offloading search to a secondary cluster
 
 This guide provides an overview of {ccr}: