Best practice is to create an app, call it (your_company_name)_all_indexers or something to that effect, create a default subdirectory and in there populate an app.conf (requirement for Splunk Cloud in particular for versioning) and a props.conf. Splunk best practice is to create apps with the name of the authoring organization and the app's target component in the infrastructure (can be a Splunk tier, a particular source, etc etc). In this case I chose "all_indexers" as the target tier.
In the props.conf put the TRUNCATE=(some #>10000) in the stanzas you create per the Splunk documentation for props (Google Splunk props.conf.spec).
Then, submit it for distribution to your indexers from the cluster master.
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