APM is not a solution where power problems are an issue..
As said below, if you have issues with your power feed - obtain a UPS! If the project is mission critical enough to not be disrupted by power loss, then a UPS should be involved and should have been realised at the start.
Also, in regards to power usage of 'idle' servers - When a server is at idle, the power draw from the HD is extremely low.. Of course it depends on the size of the server - but again, if your project is that important then the cost of powering a redundant server should have been an addressed issue from the start.
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APM is not a solution where power problems are an issue..
As said below, if you have issues with your power feed - obtain a UPS! If the project is mission critical enough to not be disrupted by power loss, then a UPS should be involved and should have been realised at the start.
Also, in regards to power usage of 'idle' servers - When a server is at idle, the power draw from the HD is extremely low.. Of course it depends on the size of the server - but again, if your project is that important then the cost of powering a redundant server should have been an addressed issue from the start.