--- a/elasticsearch.rst	Wed Aug 15 15:19:51 2018 +0300
+++ b/elasticsearch.rst	Tue Aug 21 21:15:58 2018 +0300
@@ -145,6 +145,8 @@
   Tune for indexing speed.
 https://www.elastic.co/guide/en/elasticsearch/reference/current/tune-for-search-speed.html
   Tune for search speed.
+https://www.elastic.co/blog/how-many-shards-should-i-have-in-my-elasticsearch-cluster
+  How many shards should I have in my Elasticsearch cluster?
 https://www.elastic.co/blog/filebeat-modiles-access-logs-and-elasticsearch-storage-requirements
   Filebeat modules, access logs and Elasticsearch storage requirements.