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Composing SDN Controller Enhancements with Mozart
Zhenyu Zhou
Theophilus Benson
Composing SDN Controller Enhancements with Mozart Theophilus Benson - - PowerPoint PPT Presentation
Composing SDN Controller Enhancements with Mozart Theophilus Benson - - PowerPoint PPT Presentation
Composing SDN Controller Enhancements with Mozart Theophilus Benson Zhenyu Zhou Google Runs SDNs @Scale Shhhh.. App App Controller 3 CONTENTS 02 01 03 01 Evalua>on Background Mozart Design SDNApps Assump>ons
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SLIDE 3
Shhhh…..
3
Controller
App App
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01
4
01
Background
SDNApps’ Assump>ons
02
Mozart Design
Abstrac>ons and Interfaces
03
Evalua>on
Performance and Overhead
CONTENTS
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What are SDNs?
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Network
Controller
App App
SDNApps
Rule 2 Rule 1
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Case Study: Hedera
- Improving data center performance
by load balancing elephant flows
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Gather network state Configure new paths Controller
App App Rule 2 Rule 1 Merged Rule
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What are SDNs?
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Network
Controller
App App
SDNApps
Rule 2 Rule 1 Merged Rule
SDNEnhancements Functionality Optimization
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SDNApps’ Assump>ons & SDNEnhancements
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Rule 2 Rule 1 Merged Rule
TCAM-Op>mizer Consistent Update Instantaneous Updates Infinite Hardware Resources Unmodified Ac>ons
SDN- Enhancements SDNApps’ Assump6ons
Fault Tolerance Path
Controller
App App
Controller
App App
More results can be found in the paper
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Shhhh…..
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Controller
App App Merged Rule
SDNEnhancements Optimization
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Rule 2 Rule 1 Merged Rule
Case Study: Hedera
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Related Works
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App 1 App 3 App 2 Composer
Pyre>c [NSDI’13] Ignores SDNEnhancements
App Novel Interface
Athens [CoNEXT’14] , Chopin [CoNEXT ’18] Requires understanding all SDNEnhancements
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What abstrac?ons are required to systema?cally include SDNEnhancements into the SDN ecosystem?
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01
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02
Mozart Design
Abstrac>ons and Interfaces
03
Evalua>on
Performance and Overhead
CONTENTS
01
Background
SDNApps’ Assump>ons
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Another Story: Compiler Op>miza>on
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- fgcse-ader-reload
- fipa-cp-clone
- floop-interchange
- floop-unroll-and-jam
- fpeel-loops
…
Image referenced from: https://www.cs.cmu.edu/afs/cs/academic/class/15745-s02/www/lectures/lect1.pdf
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Transac6on
Mozart
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Compiler SDN
- fgcse-ader-reload
…
Mozart SDN Network
{IO} {AD} {LS} {PF} App 1 App 3 App 2 Rule 2 Rule 1
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SDN-Flags
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Rule 2 Rule 1 Merged Rule App Transac>on
TransacAon
Message 1 Flag 1 Message 2 Flag 2 … … Global Flag
{IO}
Op>miza>on Checker
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Match 2 Ac?on 2 Match 1 Ac?on 1
Match AcAon Order
SDN-Flags
LocaAon
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Match 2 Ac?on 2 Match 1 Ac?on 1
Match AcAon Order
SDN-Flags
LocaAon
Rule 2 Rule 1 Merged Rule
{IO}
Rule Match Ac>on Ac>on 1 … ...
{AD}
Rule
{LS}
Rule
{PF}
Match 1 Ac>on 1 Match 2 Ac>on 2 … ...
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01
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02
Mozart Design
Abstrac>ons and Interfaces
03
Evalua>on
Performance and Overhead
CONTENTS
01
Background
SDNApps’ Assump>ons
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Evalua>on
- Data-Plane
- Control-Plane
- Workloads
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Fat Tree Mininet Realis>c DCN Synthe>c
Best - Random Worst - Stride
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Rule 2 Rule 1
Merged Rule
Can Mozart improve performance? What’s the overhead of Mozart? Controller
App App
What’s Mozart’s benefit
for backward compa>bility?
App
How much work does Mozart introduce for SDNApp updates?
More results can be found in the paper
Evalua>on
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Proac>ve SDNApp (Hedera)
- Saves 24.8% reduc>on in
aggregate bandwidth introduced by TCAMOp>mizer.
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Evalua>on
More results can be found in the paper
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Mozart Overhead
- Sublinear
- 1.58% to latency
Evalua>on
More results can be found in the paper
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- SDN controllers are ill-equipped with poor
primi>ves for suppor>ng SDNApps and abstrac>ons for enabling SDNEnhancements.
- Mozart interface allows for a systema>c and principled inclusion of
SDNEnhancements into the SDN ecosystem.
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Conclusion
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Thanks for your aMen?ons!
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