I have an index, which is being filled with round about 7000 - 8000 events per second (!).
The indices itself are built daily. My cluster consists of 8 powerful server. Kibana is running on a VM with elasticsearch installed like described in https://www.elastic.co/guide/en/kibana/6.3/production.html. So what is the best shards and replicas setting for this type of indices to have a performant search in kibana?