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Displaying articles for: May 2009

Configuration Matters - What Affects Server Power Consumption: Part 1



Following on from my first post I'll take a look at the affect hardware configuration will have on the power consumption of the enclosure.


To do this I went into the Blade Power Sizer and configured up two equivalent systems. I kept the enclosure configuration constant with just 2 x Virtual Connect 1/10 Ethernet Modules and 2 x Virtual Connect Fibre Modules just to simplify the example.


The Blade configuration was BL460cG1, 2 x 2.66GHz CPUs, 16GB RAM, 2x 1Gbit Ethernet, 2x 4Gbit Fibre Channel, 2x 72GB 10K SAS Drives.


Why did I pick BL460cG1, to be honest the actual server doesn't matter, what I'm trying to show here is that the hardware configuration can have a very significant effect on the enclosure power consumption.  The nice thing about the BL460cG1 for this purpose is that it shows this really clearly.


 






















































































 



Configuration A



Configuration B



System



BL460cG1 x 16



BL460cG1 x 16



CPU



E5430 2.66GHz



L5430 2.66GHz



Memory



8 x 2GB FB-DIMMs



4 x 4GB LP FB-DIMMs



Base Ethernet



1GBit Dual-Port Multi-Function



1Gbit Dual-Port Multi-Function



Additional Ethernets



None



None



Fibre Channel



Qlogic 4Gbit



Qlogic 4Gbit



Drives



2 x 72GB 10K SAS



2 x 72GB 10K SAS



Enclosure



c7000



c7000



Ethernet Switches



Virtual Connect 1/10



Virtual Connect 1/10



Fibre Channel



Virtual Connect 4Gbit Fibre Channel



Virtual Connect 4Gbit Fibre Channel



Fans



10



10



Power Supply



HP 2250W x 6



HP 2400W HE x 4



Results



 



 



Idle Power



3698W



2900W



100% Load



5855W



4238W



 


The difference between the two configurations is 798W at idle and 1,617W at high load, which is a huge difference.


Where is most of the power difference coming from, well there are 3 differences in the configuration:



  1. CPU - E5450 (80W TDP) versus L5450 (50W TDP)

  2. Memory - 8 x 2GB FB-DIMMs versus 4 x 4GB Low Power FB-DIMMs

  3. Power Supply - HP 2250W versus HP 2400W High Efficiency


The power supply is worth about 200W (25%) at Idle and 300W (18%) at full load on this configuration. So it's a significant proportion of the difference at the idle load.  At the high loads, though, the majority of the difference between the two configurations is coming from the CPU and Memory.  A standard FB-DIMM takes approximately 10W per DIMM so the difference between 4 and 8 physical DIMMs is roughly 40W per server, additionally a Low Power DIMM uses 2W - 3W less than a standard DIMM.


So what can I take from this example? 



  • System configuration matters. A lot.

  • At high loads the server power consumption is the main factor

  • At low server loads the enclosure becomes a larger proportion of power consumption.


 What are the practical steps I can use to reduce power consumption.



  • Use the lowest power cost effective processor

  • Use smallest number of largest physical DIMMs that are practical and cost effective.

  • Use the highest efficiency power supply that is available


Comments as always are welcome. Let me know where you want me to go as I continue on with this series.


Part 2 of this series is Applications Matter


 

Virtually (and literally) #1

This week we released VMMark results for the new HP BL490c G6 server blade.  The scores establish the BL490c as
the highest performing 2-socket server blade for virtualization -- eclipsing blades offered by IBM, Dell, and Cisco.


By the way, this 2-socket result ( 24.24 at 17 tiles) follows just on the heels of our #1 4-socket blade result for the BL685c G6.


It's particularly revealing that the BL490c tops the Cisco B200-M1, since Cisco trumpeted performance on VMWare as a centerpiece
of their Unified Computing System.  Cisco engineers deserve lots of kudos for their innovative work on UCS.   Their UCS ideas seem very network-centric, though, and I think
the BL490c's VMMark result shows the benefits of looking at performance problems from the data center level, rather than just from the
CCIE's perspective.


To get this high performance, our engineers designed the right compute server (with high memory bandwidth and capacity),
and coupled it with lots of NICs and bandwidth provided by Virtual Connect Flex-10.  (We also bring in the right storage, too.)


Yet the breadth of HP BladeSystem means we can deliver that performance for vSphere, but not compromise on other workloads. 
No compromises in Top500-style high performance computing, for example, or for many, many other workloads.


Bonus: HP's high-performance virtualization solution (including the HP BL490c G6 server blade and HP Virtual Connect Flex-10) are available today.
Cisco's UCS?  Well...I just hope Cisco starts shipping that product sooner than Duke Nukem Forever.


 

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About the Author(s)
  • More than 25 years in the IT industry developing and managing marketing programs. Focused in emerging technologies like Virtualization, cloud and big data.
  • I work within EMEA ISS Central team and a launch manager for new products and general communications manager for EMEA ISS specific information.
  • Hello! I am a social media manager for servers, so my posts will be geared towards HP server-related news & info.
  • HP Servers, Converged Infrastructure, Converged Systems and ExpertOne
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  • Luke Oda is a member of the HP's BCS Marketing team. With a primary focus on marketing programs that support HP's BCS portfolio. His interests include all things mission-critical and the continuing innovation that HP demonstrates across the globe.
  • Global Marketing Manager with 15 years experience in the high-tech industry.
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