Proxy group manager process on Zabbix server assigns hosts to the proxies with the smallest number of assigned hosts

Proxy group manager process on Zabbix server assigns hosts to the proxies with the smallest number of NVPS (new values per second)

Proxies in a group will vote who will take the new host. Proxy with less CPU load wins

They are assigned randomly, based on a seed generated by the Zabbix server

Hosts are assigned based on the geographical location of proxies