I heard that RHEL 7 can have mount points that point to S3...has anyone tried setting that up and placing index buckets on that partition? Wondering if it's possible or not.
As @richgalloway said this isn't something what you want to do. If you want use S3 then look Splunk SmartStore: https://docs.splunk.com/Documentation/Splunk/8.0.5/Knowledge/definecalcfields