Your team is developing a clickstream analysis application and creating an Elasticsearch cluster in Amazon Elasticsearch Service (Amazon ES). The service needs to be highly available. The downtime of the Elasticsearch cluster should be minimized. Which of the following options can help to achieve this requirement? (Select TWO.)

Answer options:

A.Enable a custom endpoint.
B.Configure a multi-AZ domain.
C.Increase the EBS storage size.
D.Enable the SAML authentication for Kibana.
E.Configure three dedicated master nodes across several availability zones.

Correct Answers: B and E
Option A is incorrect because the custom endpoint or the auto-generated endpoint does not enable the cluster to be more available.
Option B is CORRECT because, with Multi-AZ, Elasticsearch distributes data across availability zones. This approach can effectively prevent data loss when an AZ has an outage.
Option C is incorrect because increasing EBS storage size does not help with the availability.
Option D is incorrect because SAML authentication for Kibana does not influence the availability of the Elasticsearch cluster.
Option E is CORRECT because users can enable the dedicated master nodes to improve the stability of the domain and prevent cluster downtime. Please check the following snapshot:
Reference:
https://docs.aws.amazon.com/elasticsearch-service/latest/developerguide/es-managedomains-multiaz.html