Using Enterprise Manager 11 and earlier, you needed to install an Agent any time a new Server was introduced in your datacentre.
Then after you would have created a new Database or any other Target Type, you would need to perform a discovery using the Agent that was monitoring the specific server.
Starting with Enterprise Manager 12c your Targets can get discovered automatically even if no Agent has been installed yet.
Filed under: Cloud Control 12c, Configuration, Monitoring, Oracle Enterprise Manager 10 - 11g - 12c, White Papers, Cloud Control, em12c, enterprise manager cloud control, oem 12c
Reblogged this on Jan van Zoggel and commented:
Very interesting blogpost from Rob Zoeteweij, make sure to download his instructions (PDF) regarding the Auto Discovery feature in EM12c.