I am trying to understand SCOM(OpsMgr) and I am little confused as to when the data is collected and the order of operations in the initial setup. At this point I have completed SCOM installation and added couple of agents. Here are my questions.
What should be the order of setup for Agent Installation and adding Management Packs. Do I Install Agent first then add Management packs or Management packs first then agent.
Is data collected as soon as the relevant Management Pack are added? Lets say I add an agent that has SQL Server or Exchange. If I add SQL Server Mgmt Pack, would SCOM immediately start collecting data from every server that has exchange/SQL Server installed?
Is there a way I could specify not to collect SQL information from certain SQL Servers?
How are the Groups defined in real world?. We have Linux,Windows Servers, SQL Servers, Oracle Servers, IIS, Apache, Network Adapters, Exchange, DNS, etc. It will helpful to know how this is setup in your company and the general idea to manage groups so that they are just enough not too many nor too little.