>> The server used is an IBM x3850 M2 server with 128 GB RAM and two 2.6 GHz six core Xeons (Dunnington) running Windows server 2008 x64 Enterprise Edition and Microsoft SQL Server 2008.
The entire article is an interesting read, and they keep it very well documented and updated.
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To expand upon this, here's an line from their wiki regarding the Database specifically (not the Blade servers). Source = http://wiki.eveonline.com/wiki/Tranquility
>> The server used is an IBM x3850 M2 server with 128 GB RAM and two 2.6 GHz six core Xeons (Dunnington) running Windows server 2008 x64 Enterprise Edition and Microsoft SQL Server 2008.
The entire article is an interesting read, and they keep it very well documented and updated.