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This might not be that exciting for most people on HN. However, the Greenplum parallel database is pretty decent at what it does:

http://www.slideshare.net/emcacademics/dcd01-final

I don't believe there is another mature, production-grade parallel RDBMS in the open source world, so this has the potential to be quite interesting.

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Has any Greenplum DBMS code actually been released yet? Please correct me if I am wrong, but as far as I can tell, there is only a commitment to release it at some indeterminate point in the future. Until that commitment is fulfilled, it is not open source.

As far as I know, nothing has been released, and there is no public timescale or plan for doing so. I don't doubt the intention, but no, we shouldn't count these chickens just yet.

So, please read the last paragraph as "I don't believe there is any mature, production-grade parallel RDBMS in the open source world, so this has the potential to be quite interesting."

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