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Big iron lessons, Part 4: Power, cooling, and performance: Find the right balance
The z990 mainframe system uses active cooling with cycle steering to achieve balance. See how you can incorporate similar emergent cooling and adaptive power control methods into your embedded system designs. 		Articles 17 May 2005  
 
Big iron lessons, Part 3: Performance monitoring and tuning
For many developers and engineers, performance is often an afterthought. But when a product functions as designed and has proven stability and the right feature mix, success in the marketplace often depends upon performance. Architectural decisions define the ultimate feasible performance of any product. In this article, learn how performance-monitoring technology initially developed for mainframes can help you improve your own code's performance. 		Articles 19 Apr 2005  
 
Big iron lessons, Part 2: Reliability and availability: What's the difference?
Historically, system architects have taken two approaches to designing reliable computing systems: building highly reliable, fail-safe systems with low probability of failure, or building mostly reliable systems with quick automated recovery. The RAS (Reliability, Availability, Serviceability) concept for system design integrates concepts of design for reliability and for availability along with methods to quickly service systems that can't be recovered automatically. 		Articles 08 Mar 2005  
 
Big iron lessons, Part 1: FPU architecture, now and then
Floating point provides a convenient, approximate representation of real numbers that can greatly simplify scientific and engineering algorithms. This article gives an overview of two floating point formats used in the z990 architecture and discusses key FPU issues that system architects should consider in new designs. It is intended to assist system architects who are considering FPU integration and want to learn from the rich history of IBM mainframe FPU architecture evolution. 		Articles 01 Feb 2005  
 
Big iron lessons, Part 6: The right coprocessor can help with encryption
Encryption is a key aspect of security for any application or system. Furthermore, encryption is algorithmically complex, requiring significant resources for implementation, and most often, significant hardware acceleration. In this sixth and final installment to the Big iron lessons series, you'll get a review of the modern history of crypto and the encoding hardware and software techniques developed for mainframes that can show you the way forward. 		Articles 16 Aug 2005  
 
Big iron lessons, Part 5: Introduction to cryptography, from Egypt through Enigma
When is an enigma not an enigma? When it is deciphered. Learn how to make your own paper enigma encoder, then peruse the source code that duplicates its action to understand its simple yet ingenious inner workings -- as well as the basics of good cryptography. Finally, accept the challenge to crack a simple transposition cipher, because all great encryption architects must first master the art of cryptanalysis. 		Articles 26 Jul 2005  
 
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