Power management involves managing and monitoring power usage and costs on a managed computer. Barracuda Managed Workplace monitors when systems are on, off or asleep and then uses this information to estimate savings in power usage and costs based on a set of assumptions (typical power usage and average power cost).
The goal of power management is to create a consistently configured environment that is optimized for power consumption.
Use power management to
- reduce overall energy consumption
- prolong battery life for laptops
- reduce noise
- reduce operating costs for energy and cooling
All these benefits save money and reduce the impact on the environment.
To learn more about power management and work with a Power Management savings calculator, click here.
What is a Power Plan?
A power plan is a collection of hardware and system settings that can impact the energy usage of managed Windows devices. Use power plans to reduce the amount of power computers use, maximize performance, or balance the two.
Barracuda Managed Workplace Power Plan versus Windows Power Plan
Windows Power Plans include a number of settings that affect power usage by systems. By default, Windows comes with three Power Plans: Power Saver, Balanced and High Performance. Barracuda Managed Workplace allows MSPs to override locally set values using local group policy. The user's settings, including the power plan, are not touched so that if the Barracuda Managed Workplace settings are removed, the system reverts to the local settings.
If power settings are managed from a Domain Controller, they will override settings configured in Barracuda Managed Workplace. Disable this feature on Domain Controller if you are using Barracuda Managed Workplace Power Management.
Why Use a Power Plan?
Studies show that a properly configured power-managed computer can cut energy costs by 30-40%. Some power companies offer business energy cost rebates for those businesses who adopt green IT initiatives.
Prerequisites for Power Management
Power management is supported with version 6.4 and later Onsite Managers and Device Managers.
Power management is supported on Windows Vista, Windows 2008 and up.
Barracuda Managed Workplace automatically excludes virtual machines from power management for stats and reporting. Ensure that virtual machines are marked as virtual. See Marking a Machine as a Virtual Machine.
Devices must be WMI-enabled and power management enabled. You may have to configure NICs and BIOS to enable Wake-on-LAN for a device. You need Wake-on-LAN capability if you've set computers to go to sleep through power management so that end users can wake their computers.
Sleep, Hibernate and Hybrid Sleep
Sleep is a power-saving state that allows a computer to quickly resume full- power operation (typically within several seconds) when you want to start working again.
Hibernate is a power-saving state designed primarily for laptops. While sleep puts work and settings in memory and draws a small amount of power, hibernation puts open documents and programs on the hard disk, and then turns off the computer. Hibernate uses the least amount of power compared to sleep or hybrid sleep. Hibernate saves more energy because the computer goes off completely, but it takes longer for the computer to resume from hibernation, so it's not as convenient. As well, computers that are set to hibernate cannot be accessed remotely.
Hybrid sleep is designed primarily for desktop computers. Hybrid sleep is a combination of sleep and hibernate since it puts any open documents and programs in memory and on the hard disk, and then puts the computer into a low-power state so that the computer can resume quickly. That way, if a power failure occurs, Windows can restore work from the hard disk. When hybrid sleep is turned on, putting a computer into sleep automatically puts the computer into hybrid sleep. Hybrid sleep is typically turned on by default on desktop computers.
Power Plan Precedence
If devices belong to more than one group and a different power plan is applied to each group, then it's possible that a device has two or more power plans applied to it. The precedence you set to the power plan determines which power plan gets applied.
A power plan applied directly to a device is given the highest precedence.
Reports for Power Management
There are three reports available for monitoring power management:
- Site Power Management Baseline Comparison
- Site Power Management Cost Savings Estimate
- Site Power Management Summary
Scripts for Power Management
You can use these scripts to perform power management tasks:
- Enable or Disable Hibernation
- Force Hibernation
- Force Sleep
- Get Power Report (which obtains a Microsoft report from the device)
- Restart Computer
- Shut Down Computer
What You Can Do
- add a new power plan
- copy a power plan to use as a baseline for a new power plan
- delete a power plan you no longer use
- modify whether power management is enabled by default for new sites
- set the default power costs and usages to apply to a site