CDN Performance at eBay from Thousandeyes Connect

THOUSANDEYES CONNECT

MAY 13, 2015

STEVE LERNER, SENIOR MEMBER OF TECHNICAL STAFF

ABOUT EBAY

ThousandEyes Connect 2

eBay Marketplace

•  Massive •  800M listings, 24M sellers, 157M active buyers, $83B Annual

Gross Merchandise Volume •  Tens of billions of hits per day

•  Mobile •  Substantial percentage use mobile app

•  Global •  Over 50% of business from outside of USA

EBAY INFRASTRUCTURE


•  Utah Datacenter: –  Primary Power: Bloom Energy Fuel Cells: 1mw In 24 Racks –  Densest Modular Datacenter (Built With Dell): 24 rack positions @ 1MW power –  Largest Modular Datacenter (Built with HP): 44 racks @ 1.4 MW power

OPTIMIZING CDN / WEB PERFORMANCE


Front End Optimization •  Classic Techniques (defer ads, minify JS, unshard)

DNS •  Global DNS (Dyn) •  Reduce number of domains

Content Delivery Networking •  Static Objects

•  Cache everything •  Tune CDN cache based on re-use frequency

•  Dynamic Objects •  Cache if possible •  Proxy

EBAY SPEED TEAMS


Diverse Group Across Company Tackle Speed •  CDN – operate CDN and drive new technology •  Platforms – enable internal components to be CDN / speed ready •  Measurement – develop and integrate measurement tools •  Media Services – delivery and optimize images and video •  Mobile – own entire mobile stack

USING THOUSANDEYES AT EBAY


• Key Infrastructure Components i.e. – DNS Servers – Load balancers

• Site Speed – www.ebay.com – Deals.ebay.com – Specific markets i.e. www.ebay.co.uk

• Before/After Testing: CDN etc.

USE CASE: ENABLE GLOBAL DNS


Min Overall 50% Improvement In All

Regions But LATAM (25%)

DynDNS Added Here

USE CASE: ENABLE GLOBAL DNS


50% Reduction In Page Load Time On Key Page Measured From ThousandEyes Agents

50% Reduction In DNS Lookup Time Measured From

ThousandEyes, Germany

USE CASE: SITE PERFORMANCE ANALYSIS


www.ebay.com Pools

Telia Slowness

USE CASE: CDN TESTING


www.ebay.de Measured From Germany

www.ebay.de Measured From All

Agents

Pre/Post Enabling CDN Proxying

USE CASE: BGP HEALTH


Keeping An Eye On Routes

COMING SOON


• Alerting in NOC • Research of internet health problems • Private agents

TIPS


• Triangulate –  Use RUM, Synthetic Testing, and Log Analysis

• Be Aware –  Understand the details of the payload of your site / app

• Build Measurement Hooks Into Mobile Apps

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THANK YOU

STEVE LERNER SENIOR MEMBER OF TECHNICAL STAFF [email protected]

Technology

CDN Performance at eBay from Thousandeyes Connect