These are server clusters used by the Wikimedia Foundation, grouped by colocation facilities.

Wikimedia infrastructure

Data centres and PoPs


HTTP Caching






This page is about server clusters. For databases, see MariaDB sections or Analytics Hadoop cluster.

To read about the history behind current and previous hosting facilities and technology choices, see "Wikimedia Foundation#Technology" on Wikipedia, and Wikimedia servers on Meta-Wiki.

Map of Wikimedia Foundation clusters


For an explanation of the cluster names, see Infrastructure naming conventions#Server clusters.

One of the Wikimedia server racks at CyrusOne (codfw).
Servers in Ashburn, Virginia (eqiad).
Cluster Location Usage Since
Eqiad cluster‎ Ashburn, Virginia, United States (North America) Core services 2010
Codfw cluster‎ Carrollton, Texas, United States (North America) Core services 2014
Esams cluster‎ Amsterdam, Netherlands (Europe) Edge caching 2009[1]
Ulsfo cluster‎ San Francisco, California, United States (North America) Edge caching 2014[2]
Eqsin cluster‎ Singapore (Asia) Edge caching 2017[3]
Cluster Location Usage Since
knams Amsterdam (Netherlands) Networking (for esams) 2005?[4]
eqord Chicago, Illinois (United States) Networking 2015[5][6]
eqdfw Dallas, Texas (United States) Networking 2015[5][6]


Cluster Location Usage Years
Pmtpa cluster Tampa, Florida (United States) Core services 2004 – 2014
Yaseo cluster Seoul (South Korea) Core services (for zhwiki and kowiki) 2005 – 2009[7][8]
Lopar cluster Paris (France) Edge caching 2005
San Diego San Diego (United States) "The server" 2001 – 2004
Cluster Location Usage Since
sdtpa Tampa, Florida (United States) Networking (for pmtpa) 2004 – 2014

See also


  1. Evoswitch helps us improve project access in Europe and beyond (22 June 2009), Wikimedia Blog.
  2. "ULSFO going online", Deployments calendar, Week of 3 February 2014.
  3. T156028: Name Asia Cache DC, Wikimedia Phabricator, 26 September 2017
  5. 5.0 5.1 WMF Infrastructure Quarterly Review 2015 FQ1, page 66 "TechOps - Appendix", 15 October 2015
  6. 6.0 6.1 T91077: EQDFW/EQORD Deployment, Wikimedia Phabricator, 27 February 2015
  7. Started on September 2005. Oldest mention in Server admin log, 9 September 2005.
  8. "Decommissioned all yaseo servers", Server admin log, 23 July 2009.