http://360degreeinsight.com Rick Abbott's Blog Wed, 17 Mar 2010 07:05:55 +0000 http://wordpress.org/?v=2.2.1 http://360degreeinsight.com/2009/02/23/green-data-warehouse-top-10/#comment-43 Rick Abbott Tue, 03 Mar 2009 17:44:00 +0000 http://360degreeinsight.com/2009/02/23/green-data-warehouse-top-10/#comment-43 Joe- Thanks for the clarification. By overloading the processors you reduce the need for adding additional CPUs thus improving the overall efficiency of the "server units". Joe- Thanks for the clarification. By overloading the processors you reduce the need for adding additional CPUs thus improving the overall efficiency of the “server units”.

]]> http://360degreeinsight.com/2009/02/23/green-data-warehouse-top-10/#comment-41 jtfoley Tue, 24 Feb 2009 13:59:44 +0000 http://360degreeinsight.com/2009/02/23/green-data-warehouse-top-10/#comment-41 It's quite true that the processor is the most power hungry component in a computer. The point is that by loading the CPU rather than the I/O system you make most efficient use of that power. The chip uses essentially the same amount of power when it is running at 99% as it does when it is idling. In a massively parallel system you will have many CPUs running at 5% - 10% of capacity and I/O channels maxed out. With the correlation database you will have a few CPU's running at 90% - 100% of capacity and a few I/O channels managing the entire I/O load. It’s quite true that the processor is the most power hungry component in a computer. The point is that by loading the CPU rather than the I/O system you make most efficient use of that power. The chip uses essentially the same amount of power when it is running at 99% as it does when it is idling. In a massively parallel system you will have many CPUs running at 5% - 10% of capacity and I/O channels maxed out. With the correlation database you will have a few CPU’s running at 90% - 100% of capacity and a few I/O channels managing the entire I/O load.

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