# content
So I noticed yesterday that my home automation server (surprisingly useful when you have solar panels) was running out of storage space, and thought I was going to have to buy more.

Then I noticed that I'd stored every change in fan speed of the ventilation system for the past 18 months because I'd forgotten to add a retention policy.

# source.content
So I noticed yesterday that my home automation server (surprisingly useful when you have solar panels) was running out of storage space, and thought I was going to have to buy more.

Then I noticed that I'd stored every change in fan speed of the ventilation system for the past 18 months because I'd forgotten to add a retention policy.