Post on 19-Jul-2019
1 Nexans Cabling Solutions
Increasing Energy Efficiency
IT Room Infra 2011 de Kuip Pieter Heijnen
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Connecting the dots, in a reliable way
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Consider design & flexibility of structured cabling
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IT will be more polluting than
(the Economist)
Unrestrained IT power consumption could eclipse hardware costs and put great pressure on affordability, data center infrastructure and the
Luiz André Barroso, (Google)
Trends
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How to reduce energy consumption?
1. Power down servers and switches when idle
2. Reduce power when transceivers are in use
3. Monitor and manage where energy is used
4. Consider design and flexibility of structured cabling
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Power down servers and switches when idle
~ 80% ~ 90% Servers in idle state use up to 80% of full load power
Switches in idle state use up to 90% of full load power
Energy Efficient Ethernet (EEE): Low Power Idle
Puts devices to sleep Wake-On-LAN Brings devices back out of sleep
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Power down servers and switches when idle
Bron: www.intel.com
Bron: infoworld
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Large energy savings possible (e.g. up to 58% saving at 40% utilisation)
Works on Ethernet auto-negotiation
Requires copper cabling
auto-negotiation not available on fibre
External noise could affect recovery time
Shielded cabling better choice
Power Saving with EEE
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Reduce power when transceivers are in use
Full power Power Backoff using 10GBase-T
Turn down transmit power over shorter distances
Full power
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Benefits of higher grade cabling
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>95 .34.1 0
Power Backoff Scale
75-85 26.9-30.5 4
85-95 30.5-34.1 2
55-65 19.8-23.4 8
65-75 23.4-26.9 6
25-45 9.0-16.2 12
45-55 16.2-19.8 10
Length (m) IL 250 MHz (dB) Backoff (dB)
0-25 <9.0 14
Example: 50m Channel: Class EA Insertion Loss > 16.5dB Class EA PBO 10dB LANmark 7a Channel Insertion Loss 13.6dB LANmark 7a PBO 12dB Lower transmit power = greater energy savings
IEEE Power Backoff Scheme
Benefits of higher grade cabling
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Reduce power when transceivers are in use (2)
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Data Centre design flexibility
Top of Rack or Structured Cabling?
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Top of Rack configuration
Advantages:
Cost saving on horizontal copper cabling
Reduction volume of cables under floor
Suitable for high density blade servers
Disadvantages:
Poor Switch port utilisation
Inefficient Power consumption
Extra Maintenance & administration
Expensive & difficult Scalability
Configuration flexibility?
Extra Cost of switches fibre copper
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Structured Cabling in data centres
Advantages:
Increased switch port utilisation
Superior energy efficiency
Quickly adapt the system
Easier network expansion
Excellent flexibility
Overall lower cost of ownership
Disadvantages:
More cables needed
More racks needed
Length restrictions on horizontal copper cabling to be respected
fibre copper
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Benefits of structured copper cabling
Design flexibility - Longer length, 100m compared to 7m
twinax infiniband - Better port utilisation
No hotspots
LANmark 6A - Shorter links 5m compared to 15m
No air dams
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Monitor and manage where energy is used
EMAC Horizontal PDU - manageable
Reports for power usage / temperature / humidity
EMAC Rackmanager
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Benefits of higher grade copper cabling
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Summary
So basically we can save energy due to:
1. Power down servers and switches when idle
2. Reduce power when transceivers are in use
3. Monitor and manage where energy is used
4. Considering design and flexibility of structured cabling
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https://www.nexans.co.uk/eservice/Netherlands-nl_NL/navigate_266412/Energy_Efficiency.html
More on Energy Efficiency ...
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Connecting the dots, in a reliable way
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Invitation to meet Nexans experts
We are happy to invite you, and meet our Nexans Experts:
1. Showcasing our latest LAN innovations
LANmark 6A (multipair & preterm), LANmark 7A & GG45
LANmark OF (MPO solution ready for 40/100G)
LANsense Intelligent Infrastructure Management
2. Discussing and help you with:
latest (DC) standardisation
energy efficiency
network strategy & design Located in Buizingen (Belgium) near Brussels
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Vragen ?
Pieter Heijnen Nexans Cabling Solutions pieter.heijnen@nexans.com