How Removing a Server Affects Power Values
If the system has been set up to collect live data from an external system, peak power values that occur in a configurable time period (10, 20 or 30 days) are used for power calculations. This data is more accurate than if the system only has estimated values.
However, when removing a server from a rack, the power peak values from that server are still included in the measured data for the rack the next 30* days.To avoid this, the time period for measuring the data from the rack PDUs in the rack has been automatically reduced:
When was the server removed from the rack?
Measured data collected in time period:
Less than 24 hours ago
Present time - 24 hours
Less than 30* days but more than 24 hours ago
More than 30* days ago
Present time - 30* days
*30 days is the default value set in the external system configuration settings; this value can also be 10, or 20 days.
The power peak measurements might still contain data from the deleted server up to one day after a server has been removed; recommendations and capacity calculations for that rack can be less accurate. It can take several days for the capacity calculations to stabilize because of changes in the server load over the following days.