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,.     ... View more

Users are managed through Settings -> Users.    On the Users page you can add new, edit existing and delete users from the system (as long as the user you are logged in as has the appropriate permissions)   Roles are managed by going to Settings-> roles.   On this page you can add, edit and delete roles from the system.  ... View more

Open the alert in the Edit Alert screen.       The Alert schedule drop down has several options, including Run Every Hour, Run Every Day, Run Every Week, and Run Every Month.    If more granular options are needed you can choose "Run on Cron Schedule" to be able to schedule the alert using a standard CRON schedule string.      ... View more