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Intro

This web-site explores the idea that data has a dual nature - a stream (flow) and a particle (id) - an idea inspired from physics that light has the dual nature - wave and particle. It is collection of research and design notes on multiple, seemingly unrelated, topics that follow from this core assumption.


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Performance Testing a New CRM

This article is a summary of the approach and lessons learned during the performance test a web-services implementation of a new CRM system.

On Data Consistency Pattern

 Data consistency along with Multi-Step Process and Composite Application are the most common integration scenarios. At a very high level, multiple components manipulate and store the same entity. When one component modifies the entity the others must be notified of this change and ensure a consistent state of the entity across the whole system.  In real applications, to address the complexities around keeping the entity consistent in a distributed system, the business and system architects impose constraints that simplify the patterns of interaction and lead to a robust solution. The rest of these article contain typical approaches to Data Consistency. Depending on the type of entity there could be design variations but they all share the approach. To make this document more concrete, I will use the Customer entity as an example. One solution is to centralize all the Customer changes in one component, the “Customer Master,” and all the other component keep read-only copies of the enti

On Defining Messages

“Defining Message Formats” is the title of a message posted on the Service Oriented Architecture mailing list [1]  which attracted a lot of attention.  The post summarizes  the dilemma faced by solution architects when they have to define a service interface: 1. Base the internal message format on the external message standard (MISMO for this industry). This message set is bloated, but is mature, supports most areas of the business, and is extensible for attributes specific to this company and its processes. 2. Create an XML-based message set based on the company's enterprise data model, which the company has invested a great amount of money into, and includes a very high percentage of all attributes needed in the business. In a nutshell, we've generated an XML Schema from ER Studio, and will tinker with that construct types that define the payloads for messages. 3. Use MISMO mainly for its entity definitions, but simplify the structure to improve usability. We benefit from the