What are the system requirements for installing Splunk?
requirements can be found here: https://docs.splunk.com/Documentation/ES/7.1.1/Install/DeploymentPlanning .
Additionally you can contact Splunk Professional services to help with planning and architecture decisions,.
@yeasuh - For your on-prem splunk environment you can find the requirement here - https://docs.splunk.com/Documentation/Splunk/9.1.0/Installation/Systemrequirements