What databases do the World Wide Web's biggest sites run on? [closed]

Answer 1

Flickr uses MySQL.

YouTube uses MySQL but they are moving to Google's BigTable.

Myspace uses SQL Server.

Wikipedia uses MySQL.

Answer 2

Microsoft.com

• SQL Server (no surprise there)

Microsoft.com stats:

• 250 million unique visits/month.
• 70 million page views/day.
• 15,000 connections/second.
• Maintains an average of 35,000 concurrent connections to a total of 80 Web servers.

Sources:

• http://technet.microsoft.com/en-us/mscomops/default.aspx

Answer 3

PlentyOfFish.com using Microsoft SQL Server:

https://blog.codinghorror.com/scaling-up-vs-scaling-out-hidden-costs/

Answer 4

Stack Overflow - SQL Server.

Jeff Atwood wrote a nice blog post on this

https://blog.stackoverflow.com/2008/09/what-was-stack-overflow-built-with/