List of Organizations with largest Hadoop Clusters

Company Name Number of Nodes Company Name Number of Nodes

Yahoo! 42,000

Adobe 30

LinkedIn 4100

Gruter. Corp. 30

Facebook 1400

IIIT 30

NetSeer 1050

Infochimps 30

EBay 532

Rackspace 30

CRS4 400

University of Glasgow 30

Powerset / Microsoft 400

Forward3D 24

Adknowledge 200

Bixo Labs 20

Neptune 200

Brockmann Consult GmbH 20

AOL 150

Datagraph 20

Inmobi 150

Kalooga 20

FOX Audience Network 140

Media 6 Degrees 20

Specific Media 138

Mercadolibre.com 20

Search Wikia 125

GBIF 18

eCircle 120

MicroCode 18

Spotify 120

MyLife 18

A9.com 100

SLC Security Services LLC 18

ARA.COM.TR 100

ETH Zurich Systems Group 16

Cornell 100

RightNow Technologies 16

Last.fm 100

Taragana 16

Tynt 94

University of Twente 16

Deepdyve 80

Alibaba 15

Rapleaf 80

Caree.rs 15

Rakuten 69

Charleston 15

Telenav 60

Cooliris 15

Contextweb 50

Beebler 14

Hadoop Korean User Group 50

Socialmedia.com 14

Openstat 50

Hulu 13

Portabilité 50

adyard 12

Recruit 50

Accela Communications 10

WorldLingo 44

Brilig 10

Rovi Corporation 40

Iterend 10

Benipal Technologies 35

Clic 10

Redpoll 35

PSG Tech 10

Source: http://www.hadoopwizard.com/which-big-data-company-has-the-worlds-biggest-hadoop-cluster