Photo via Tom Raftery
The power consumption of desktop computers, which are often only used 8 hours a day, (and may need to be woken up once a month at 3am for an update) is relatively straightforward to manage. On the other hand, the power management of servers is quite a bit more complex. Servers are, by definition supposed to be accessible at all times, so you can’t shut them down, right?
Well, yes and no.
Not all servers are equal. Up to 15% of servers globally are powered on, and simply doing nothing. This equates to roughly $140 billion in power costs and produces 80 million tons of carbon dioxide annually.
Nightwatchman helps in a number of ways. First, its agent-based software quickly identifies servers whose CPU utilisation is is simply associated with its own management and maintenance processes (i.e. the server is unused). These servers can be decomissioned or repurposed…