We have not deployed this yet, however as per Qlik local groups will not work. They are proposing to use SAN.
Even if SAN is served as windows share drive. Where do you create security groups in cluster envionment. Only solution is to crete groups in AD, assign users to those groups and then create permission via publisher.
Currently: We have 1 server with all qlikview services running. We create local security groups and assign users to these groups via AD (integrated). These groups are then assigned to dashboards residing on same local server.