The Greenplum ORCA Optimizer

In January Greenplum rolled out a new query optimizer. This is very cool and very advanced stuff. Query optimization is a search problem… in a perfect world you would search through the space of all possible plans for any query and choose the least expensive plan. But the time required to iterate through all possible…

A Big Data Sound Bite…

Here is a sound bite on Big Data I composed for another source… Big Data is relative. For some firms Big Data will be measured in petabytes and for other in hundreds of gigabytes. The point is that very detailed data provides the vital statistics that quantify the health of your business. To store and…

Exalytics vs. HANA: What are they thinking?

I’ve been trying to sort through the noise around Exalytics and see if there are any conclusions to be drawn from the architecture. But this post is more about the noise. The vast majority of the articles I’ve read posted by industry analysts suggest that Exalytics is Oracle‘s answer to SAP‘s HANA. See: PCWorld InfoWorld…