Blog Correction (28-SEP-2010). In the section below about processor comparison I originally stated ab erroneous aggregate core count for the full rack X2-2. I have edited out that mistake and left in place the socket-to-socket comparison which was the center of the point I was trying to make anyway.
I’ve been getting a lot of questions about why one would choose Exadata Database Machine X2-8 over Exadata Database Machine X2-2. That’s actually a tough question, however, some topics do spring to mind. I’ll start a list:
Not on the numbered list is the more sensitive topic of processor power. While these sorts of things are very workload-dependent, I’d go with 16 Intel Xeon 7500 (Nehalem EX) processors over 16 Intel Xeon 5600 (Westmere EP) for most any workload.
So, readers, what reasons would motivate you in one direction or the other?