Data Center Interconnectivity Trends and Their Effect on Optical Networking

Data Center Interconnectivity Trends and Their Effect on Optical Networking

Niall Robinson, VP Global Business Development

June, 2015

© 2015 ADVA Optical Networking. All rights reserved. Confidential.22

• What’s Hot and What’s Not when it comes to Data Center Interconnectivity?

• Not including SDN as that’s already been covered in other presentations!

• Is DCI really different from traditional optical transport?

• DCI use cases and deployment examples

• Where does the DCI market go from here?

Content


• Traditional telecom shelves

• Vendor lock-in of any kind

• Backplane connectivity

• OTN

• TL1

• NMS

• 15-20 year equipment lifetime

• NEBS-type environmentals

• Small footprint but scalable

• Low power dissipation

• Open interfaces• Optical AND management

• QSFP28 clients

• BYO client pluggable optic

• Encryption

• Simple install and config.• Minimize SKU’s

Data Center Interconnectivity


• Inefficient space usage for smaller capacity deployments

• Issues at colo sites where space is a premium

Size Matters: The Goldilocks Zone

Too Big

Too Small

Just Right • Maximizes capacity usage regardless of deployment size

• Fits even the smallest colo sites and scales to the largest deployments

• Fits colo sites well but doesn’t scale efficiently for the largest deployments

• Non-optimized power management

>4RU

2RU to

4RU

1RU to

2RU


Open Optical Line System

5.6 Tb/s

16 Tb/s

51.2 Tb/sPerformance indicators• Equipment density• Power efficiency• Fiber capacity• Programmability


Is DCI Really Different?


Datacenter Interconnect Architectures

global extension

global extension

Metro connectivity:

• Data center distances < 100km

• Predominantly Ethernet

• Point-to-point DWDM (low latency)

Long-haul connectivity:

• Globally distributed data centers

• Predominantly Ethernet

• Reconfigurable optical layer

• Open Optical Layer


• Two customers, the same size, same business segment:• Customer #1: I really only need about 1 Terabit between my Data Centers• Customer #2: I want 400 Terabits between my Data Centers, and I want it today

• Why the difference?• #1 uses local compute clusters with replication and load balancing between them• #2 wants localized compute clusters to behave as global cluster

• Amdahl’s lesser known law:• In parallel computing, interconnect must equal compute• E.g. 1Mbit/s I/O for every 1MHz compute

A Tale of Two Cloud SPs

8

Customer#1

Customer#2


DCI Use Cases


Smaller

Edge Sites

Mega Data Center

Need High

Channel Counts

Need Open API’s

Need Big Capacityfor Data Centers

Need Efficiency

Must scale from 10G to 100T

Data Center Interconnect Needs

RESTCONF

NETCONF

CLI REST

Co-Lo Sites

Need SmallForm FactorsFor Co-Lo’s

Need OpenLine Systems


Use Case Example 1High Capacity Connectivity w/ Open Optical Line System


Where Do We Go From Here?


Coherent Modulation Limits

OSNR Penalty

2500km

600km

<100km

??? • 4QAM (QPSK) is current coherent

baseline

• 16QAM enables metro and regional links

• 64QAM potentially applicable to shortest point to point links

• 128/256 QAM not currently applicable

2

minD

POSNR

avg

req ∝

D = the distance separating

constellation points

Channel Rate

(Gbit/s

)


• Open Line Systems, both optical and management!

• Greater spectral efficiency• New modulation techniques

• Always moving to best CMOS node for lowest ASIC power dissipation

• Further optical/opto-electronic integration• Integrated optical engines / integrated optics & electronics

• Raman plus other optical technologies to maintain distance & improve flexibility / resilience

• Continue to optimize space, cooling and security solutions

• Both data center physical design AND equipment design

• Continued push for removing vendor / technology lock-in

DCI Futures

Thank You!

Niall Robinson

Vice PresidentGlobal Business Development

Phone: +1 972 759 1262Fax: +1 972 759 1201Mobile: +1 978 933 [email protected]

ADVA Optical Networking NA Inc.2301 N. Greenville AvenueSuite 300Richardson, TX 75082USAwww.advaoptical.com

Data Center Interconnectivity Trends and Their Effect on Optical Networking

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