"For the two indexes.conf volume settings below - would one take precedence over the other if they use the same path?" I would recommend not use the same paths for volumes, and not to include one path into another. (and not include indexes paths into other indexes, or mix in the same folders volumes paths and non volume paths..) Otherwise, the splunk measure of the disk used size will be all incorrect, and you may experience data frozen faster. And you probably should see warnings in splunkd.log when you start the indexers, about risks on the paths conflicts.
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