Assuming you've verified 12 indexers can handle both the indexing and search loads, then you just need to remove 12 indexers. 1. Remove 12 indexers from outputs.conf on all instances. Ideally, you...
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Assuming you've verified 12 indexers can handle both the indexing and search loads, then you just need to remove 12 indexers. 1. Remove 12 indexers from outputs.conf on all instances. Ideally, you have this in an app so you can make the change once an push it to where it is needed (SHs, forwarders, DS, MC, CM, LM). If you've implemented Indexer Discover then you can skip this step. 2. Put the 12 indexers into manual detention. This will keep them from accepting new data or replicated buckets. splunk edit cluster-config -auth <username>:<password> -manual_detention on 3. Run this command on each indexer being removed. splunk offline --enforce-counts Wait for the indexer to stop before proceeding to the next.