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Letter Drop

Multiple, Consistent Views; 64 Bits Is Better; Clarification

October Cover

Multiple, Consistent Views

In David Stodder's "What You Don't Know Can Hurt You" (October 2005), he refers to a "single view of the truth" — nothing short of a mantra in the data warehousing (DW) world. But today's focus on SOA is driving an expanded need for not just one view, but multiple consistent interpretations of business data by all stakeholders (users, applications, processes and services), letting them use (and reuse) it within their own contexts.

Single view relies on syntactic data definitions and accurate data value, serving fixed queries and reports. Multiple interpretations require semantic reconciliation of not only data schemas and syntactic metadata, but business vocabulary and policies as well.

For example, all consequences of a business event must be reflected accurately in downstream applications and across business domains, maintaining consistent application of business policies. Determining all impacts and appropriate actions, from each perspective, is typically a manual process of data collection and interpretation.

Automated, accurate reporting has been tackled and solved by establishing a DW with a single view of the truth. Similarly, automated computer-based data reclassification and services mediation is now being tackled and solved with OWL-based inference engines that provide semantic integration of that data with content from multiple sources and business rules, then integrating with process managers to automate execution within multiple contexts.

Vickie Farrell
VP, Marketing
Cerebra
Carlsbad, Calif.

64 Bits Is Better

I'd like to point out that Jacques Surveyer's "How to Put the BI in 64 Bits?" (Dashboard, September 2005) doesn't fully explain the benefits and specifications of the Intel Itanium processor and doesn't do justice to the 64-bit platform.

Unlike 64-bit Xeon or Opteron, the 64-bit Itanium processor has 16 terabytes of physical memory address space, 512 gigabytes of virtual memory address space and 1 terabyte of system cache. Also, on a 32-way Itanium SMP machine, you have 102 gigabytes per second memory bandwidth, 51 gigabytes per second I/O and 172.3 GFLOPS in a single chassis.

It also seems important to mention that BI leaders Microsoft, Informatica, Business Objects and Hyperion all have true 64-bit capable applications, with more vendors rolling out soon.

Scott Barlow
Product Consultant
NEC Solutions (America)
Salt Lake City

Clarification

This statement from Jacques Surveyer's "How to Put the BI in 64 Bits?" is not completely correct: "Part of the problem is deciding which 64-bit architecture to support, because each one requires different code compiles and reprogramming."

The instruction sets for EM64T and AMD64 (Opteron and Athelon) are identical. A single executable will run on either platform. Intel Itanium (IA64) requires a separate code base and is executable.

Name Withheld by Request

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