The Uptime Job, reports on the number of days that the computer, which has the RoCKNet Agent running on it, has been "up" for.
e.g. If you wanted a snapshot, every day, of how many days the server FILESVR1 had been up for, you would do as follows:
1) Make sure that there was a RoCKNet Agent installed and running on the server FILESVR1 (only required once per server)
2) Create an "Uptime Job" as shown below: