Term
| about what percentage of power supplied does a server's CPU consume? |
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Definition
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Term
| what percentage of energy goes towards servers storage and network equipment in a data center generally? |
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Definition
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Term
| what percentage of the time does a server get utilized generally? |
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Definition
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Term
| what is a utility administrators are using to deal with energy inefficiency at the enterprise level? |
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Definition
| ACPI - advanced configuration and power interface |
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Term
| what 3 ways does ACPI handle energy efficiency? |
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Definition
throttling-states - masks clock ticks from processor/power capping
power-states - reduce clock rate of CPU
sleep (c) - states - clock rate is zeroed out |
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Term
| which is more efficient, a t-state or a p-state? |
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Definition
| p-state because it delivers more power at a given voltage |
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Term
| what is the second biggest user of power inside a server? |
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Definition
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Term
| what uses more power, FB-DIMM or unbuffered-DIMM? |
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Definition
| FB-DIMM because of the advanced memory buffer (uses 5 was constantly) |
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Term
| since FB-DIMM uses so much more power than unbuffered-DIMM, what has been made to deal with this |
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Definition
| green FB-DIMM, uses 37% less energy |
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Term
| is green FB-DIMM and regular FB-DIMM interchangeable? |
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Definition
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Term
| the best performance per watt layout w/ DDR2 DIMM is ______________ |
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Definition
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Term
| ________________ are more energy efficient than local drives on every server |
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Definition
| dedicated drive arrays separate from server |
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Term
| all fans should be based on _______ |
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Definition
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Term
| what is one of the most recent developments in data center cooling which has saved up to 6 figures per year? |
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Definition
outside-air cooling
used since 2009 in northeast england and new mexico |
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Term
| an alternative to PSU's in server environments in the interest of energy savings is ... |
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Definition
| powering servers directly with DC UPS's |
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Term
| define energy efficiency: |
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Definition
| less energy to provide same level of service |
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Term
| the cost of powering and cooling a server for 3 years is ... the cost of the server itself |
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Definition
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Term
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Definition
| computer room air conditioner |
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Term
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Definition
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Term
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Definition
| thermal design power - the max amount o power the cooling system in a computer is required to dissipate |
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Term
| as the number of cores in a processor increases, the wattage required per core goes .... |
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Definition
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Term
| intel and AMD's p-states are called |
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Definition
| demand based switching and powernow |
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Term
| what is the difference between power capping and power saving? |
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Definition
| capping applies a ceiling to the amount of power that can be used, power saving will allow for more energy to be used if it is needed |
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Term
| intel's _________ is a piece of hardware dedicated to optimizing CPU performance |
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Definition
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Term
| name 2 factors which affect power consumption in server memory |
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Definition
number of DIMMs
size of DIMMs |
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Term
| __________ are more energy efficient than hard disk drives |
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Definition
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Term
| __________ are more energy efficient than hard disk drives |
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Definition
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Term
| redundant power supplies run _________ and are not at the top of their __________ |
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Definition
at or below 50% capacity
efficiency curve |
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Term
| linux machine's power usage can be tuned using which file |
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Definition
| /sys/devices/system/cpu/sched_mc_power_savings |
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Term
| a solution to the underutilization of servers is... |
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Definition
| virtualization of servers within one physical host server |
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Term
| name 2 IBM tools for energy efficiency |
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Definition
| Power Configurator and Active Energy Manager |
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Term
| IBM's active energy manager allows you to set 2 things for power savings, what are they |
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Definition
power policies
group power capping policies |
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Term
| heat output from servers/racks is measured in |
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Definition
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Term
| 2 units of measurement for the efficiency of a data center are.. |
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Definition
PUE - power usage effectiveness
DCiE - data center infrastructure efficiency |
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Term
| on average what percentage of power supplied does a server's redundant fans use? |
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Definition
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Term
| in t-states, the maximum number of clock ticks that can be masked from the processor is... |
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Definition
| 7 out of every 8 clock ticks |
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Term
| the 3 largest virtualization softwares are... |
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Definition
| VMWARE esx, microsoft hyper-v, and xen |
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Term
| a data center with high power efficiency is one with a DCIE of more than _____ |
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Definition
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