Patent ID: 8612801

Claim:
A server chassis comprising: an uninterruptible power supply configured to provide a reserve power when a primary power is lost, and to send a power loss signal when the primary power is lost; and a server including a controller in communication with the uninterruptible power supply, the controller configured to receive a desired server uptime, to receive an indication that a power limit for the server decreases over the desired server uptime, to receive the power loss signal from the uninterruptible power supply, to send a power capacity query to the uninterruptible power supply, to receive a reserve power capacity of the uninterruptible power supply in response to the power capacity query, wherein the indication that the power limit for the server decreases over the desired server uptime is received before the reserve power capacity is received, to calculate the power limit for the server based on the reserve power capacity of the uninterruptible power supply and on the desired server uptime, and to enforce the power limit on the server, to determine when the primary power has been restored, and to clear the power limit for the server in the controller in response to the primary power being restored.