Far Cry: Will CDNs Hear NDN’s Call?conferences.sigcomm.org/acm-icn/2020/assets/5-1...Far Cry: Will...

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♧ Chavoosh Ghasemi (The University of Arizona) Hamed Yousefi (Aryaka Networks) Beichuan Zhang (The University of Arizona) Far Cry: Will CDNs Hear NDN’s Call?

Transcript of Far Cry: Will CDNs Hear NDN’s Call?conferences.sigcomm.org/acm-icn/2020/assets/5-1...Far Cry: Will...

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♧ ChavooshGhasemi(TheUniversityofArizona)HamedYousefi (Aryaka Networks)Beichuan Zhang(TheUniversityofArizona)

FarCry:WillCDNsHearNDN’sCall?

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Evolution• TransportNetwork• End-pointtoend-point• OperatesonIPaddresses

• ContentNetwork• End-pointtocontent• Operatesoncontent’snames

• ContentDeliveryNetwork(CDN)• Implementsacontentnetwork overatransportnetwork (i.e.,theInternet)

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ICN/NDN

• Ayoungnetworkingtechnologytobuildacontentnetwork• Simplearchitecture&Securedesign

• Goal:• ComparecontentnetworksbuiltbyCDNsandNDN

• ImportantNote:• Thisworkisonlyfocusedoncachingandretrievalofstaticcontents

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Real-WorldMeasurements• Deployedanadaptivevideostreamingservice• Evaluatedcontentnetworks:

• Akamai• Fastly• NDNtestbed

• Usersinfourdifferentcontinents• Two-weekexperiment

Metrics:1. QualityofExperience(QoE)2. Originworkload3. Failureresiliency4. Contentsecurity

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QualityofExperience(QoE)

• Videoresolution

• Videostartupdelay

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QoE – VideoResolution

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QoE – VideoResolution– Parallelism

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QoE – StartupDelay

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QoE – StartupDelay– Caching

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QoE – SoftwareMaturity

• Anewsetofexperiments• Exclude contributionofparallelismandlargedeploymentofCDNs

• Average throughput:• NDNtestbed è 7.54Mbps(23.48Mbpsatbest)• Akamai è 96.7Mbps• Fastly è 83.2Mbps

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QoE – Summarize

• AkamaiandFastlytryto:1. Cachecontentsascloseaspossibletoend-users2. Downloadcontentsthroughamassiveparallelism,usingoptimized

software/protocols

• NDNcanbarelymeetthesetwogoals• Lackofsoftwarematurityandlargedeployment

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OriginWorkloadAkamai incurs1.77 timesmoretrafficloadtothevideoserverthanNDNdoes

Fastly isaccountablefor38% ofthetotaltrafficreceivedbythevideoserverfromallthreenetworks.

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OriginWorkload– WhyNDNisbetter?

TwomaincontributorstoNDNtestbed’sperformance:

• Networkarchitecture• AkamaiandFastlypartitiontheirnetworktoislands

• Requestaggregation• Akamaidoesnotaggregaterequestsseekingforthesamecontent

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FailureResiliency

Thesuccessratioofeachnetworkinservingtheend-users’requestsfromtheircacheswhentheoriginstopsservingcontent

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OriginWorkload&FailureResiliency– Summarize

• HightrafficloadandfailureresiliencyissuesinCDNsarerelatedtotheirnetworkdesign• Resourceover-provisioninginCDNscannotaddresstheseissues

• NDNbenefitsfrom:• Statefulforwardingplane• Non-partitionednetworkdesign• Uniquein-networkcachingfeatures

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ContentSecurity

• CDNssecurechannelsbyTransportLayerSecurity(TLS)• TLSguaranteesdataprivacy

• NDNsecurescontentsbydatasignature• NDNguaranteesdataintegrity

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Security– Real-WorldScenarios

- Keepyourprivatekeyprivate

- Schematizetrustfordynamiccontents

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Security- Summarize

• NDNsecuritymodelispromisingforlargecontentdistributionpurposes

• MainissueofNDNsecuritymodel• Lackofprivacy

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Lessons&Challenges

- Hardware&SoftwareMaturity

- TheNeedforNDNApplications

-ManagementandDebugging

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Conclusion• ComparethecontentnetworksbuiltbyNDNandCDNs

• QoE ismainlydeterminedbyhardwareandsoftwarematurity• CDNsoutperformthecurrentNDNdeploymentintermsofQoE

• Originworkloadandfailureresiliencyaremainlytheproductsofthenetworkdesign• NDNtestbedoutperformsCDNs

• NDNcan realizearesilient,secure,andscalablecontentnetworkifaccompaniedby• Maturesoftwareandprotocols• Sufficienthardwareresources

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ThankYou


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