Failover when clusterA is down

1. You can simulate this by shutting down either of the clusters. Let’s shut down cluster A in this tutorial.
2. Start Logstash with the same configuration file. (This step is not required in real use cases where Logstash ingests continuously.)

   			### On Logstash server ###
   bin/logstash -f multiple_hosts.conf
   
   		

3. Observe all Logstash traffic will be redirected to cluster B automatically. ::::{tip}
   You should also redirect all search traffic to the clusterB cluster during this time.
   ::::
4. The two data streams on cluster B now contain a different number of documents.
   • data streams on cluster A (down)
     • 50 documents in logs-generic-default-replicated_from_clusterb
     • 50 documents in logs-generic-default
   • data streams On cluster B (up)
     • 50 documents in logs-generic-default-replicated_from_clustera
     • 150 documents in logs-generic-default