The essence of
IT monitoring can be summarized in a single
goal – to ensure that all your IT equipment is up and performing to the level
expected of it.
In the basic
monitoring solutions available, this is achieved by simply sending a ‘ping’
to the host and awaiting a response. If a response is obtained, then you can
be assured that the host (server/router/switch, etc.) is up and hasn’t been powered off, crashed
etc. This function provides you with a simple view into your IT estate and ensures
that the things that should be up, are
monitoring solutions allow more detailed views into the operational status of
those hosts, for example, “I know that my server is up and running, what I want to do
know is to make sure that the hard drive doesn’t run out of space”. This is called
a Service Check; checking that the hard drive is working, that the CPU is not 100%
busy, etc., and this approach ties nicely into the philosophy of active monitoring.