In current environment (SP 2007), we have publishing portal sites (number of site collections:50), collaboration sites (number of site collections: 60 ) configured on one web application and my sites configured on separate web application. All these site collections are configured with explicit path based site collections for each department like IT, HR, etc. If site collection exceeds 100 GB, we create another site collection for the same department but with different explicit path and with new DB, like
http://intranet.xyz.com/teamsite1/IT , if it exceed 100 GB , we create another with http://intranet.xyz.com/teamsites2/IT and assign new DB to this site collection.
Please suggest me the best design if I have to implement the same using Host Named Site Collection. Thanks!