Splunk Fundamentals 1 Practice Exam

What is the minimum number of search heads required for a search head cluster?

1. Two

2. Three

3. Four

4. Five

The correct answer is: Three

A search head cluster in Splunk is designed to provide high availability and load balancing for searches across multiple search heads. The minimum number of search heads required for a search head cluster is three. This configuration allows for a quorum to be established, which is crucial for maintaining cluster management and ensuring that the cluster continues to function correctly, even if one of the search heads goes offline. Having at least three search heads helps in achieving fault tolerance; with a majority (two out of three) still operational, the cluster can continue performing searches. This setup also improves performance by allowing searches to be distributed among the search heads, reducing the load on any single instance and leading to faster query responses. Options mentioning fewer search heads (like two) do not provide sufficient fault tolerance, as losing one of the two search heads would result in a situation where there’s no majority to maintain the cluster. Therefore, a configuration of three search heads is considered the minimum requirement to ensure effective clustering and operational reliability.