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Their product, extremeDB-64, is written to take advantage of large memory systems by pegging the entire dataset in physical RAM. The advantages are pretty obvious - as are the downsides as well. The McObject guys have really thought about the problems, though, and extremeDB-64 is an impressive database solution.
What’s more impressive is McObject’s recent benchmark and scalability testing, where they test a 1.17 Terabyte, 15.54 billion row in-memory database on a 160-core SGI Altix 4700 server. They measured transaction throughput of up to 87.78 million query transactions per second, which is the sort of uber data-warehousing capability I know a number of businesses would love to get their hands on.
The benchmark white paper is available as a free download - head on over to this page to enter your details.