Some very, very, very large data warehouses

In the course of my research, I'm running across some VERY large data warehouses.  Several of them, especially in the web log/network event area, are in the multi-petabyte range.  Perhaps most surprisingly, they're run on a broad range of data management software -- not just Teradata, but also Greenplum, Hadoop/Hive (which isn't even a DBMS!), Greenplum, and others.

My current golly-gee-that's-really-big list goes something like this:

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