Arthur de Haan, Windows Live Test and System Engineering Director gives you a look behind the scenes at Hotmail, and tell you more about what it takes to build, deploy and run the Windows Live Hotmail service on such a massive global scale.
Hotmail is a gigantic service in all dimensions. Here are some of the highlights:
•We are a worldwide service, delivering localized versions of Hotmail to 59 regional markets, in 36 languages.
•We host well over 1.3 billion inboxes (some users have multiple inboxes)
•Over 350 million people are actively using Hotmail on a monthly basis (source: comScore, August 2009).
•We handle over 3 billion messages a day and filter out over 1 billion spam messages - mail that you never see in your inbox.
•We are growing storage at over 2 petabytes a month (a petabyte is ~1 million gigabytes or ~1000 terabytes).
•We currently have over 155 petabytes of storage deployed (70% of storage is taken up with attachments, typically photos).
•We’re the largest SQL Server 2008 deployment in the world (we monitor and manage many thousands of SQL servers).
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