Amazon Cloud EC2

Karussell

If you are command line centric guy like me and you are on Ubuntu this post is for you.Getting starting with Amazon was a pain for me although once you understand the basics it is relativly easy. BTW: there are of course also other cloud systems like Rackspace or Azure.

If you want the official Ubuntu LTS Server (currently 10.04) running in the Amazon Cloud you can do:

ec2-run-instances ami-c00e3cb4 --region eu-west-1 --instance-type m1.small --key amazon-key

or go to this page and pick a different AMI. Hmmh, you are already sick of all the wording like AMI, EC2 and instances? Ok,

lets digg into the amazon world.

Let me know if I have something missing or incorrect:

  • AMI: Amazon Machine Image. This is a highly tuned linux distribution in our case and we can choose from a lot of different types – e.g. on this page.
  • EC2: Elastic Compute…

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UML Unified Modelling Language

Caminao's Ways

Identities and Aspects

Despite its object and unified vocations, the OMG’s UML (Unified Modeling Language) has been sitting uneasily between scopes (e.g requirements, analysis, and design), as well as between concepts (e.g objects, aspects, and domains).

Those misgivings probably go a long way to explain the limited, fragmented, and shallow footprint of UML despite its clear merits. Hence the benefits to be expected from a comprehensive and consistent approach of object-oriented modeling based upon two classic distinctions:

  • Business vs System: assuming that systems are designed to manage symbolic representations of business objects and processes, models should keep the distinction between business and system objects descriptions.
  • Identity vs behavior: while business objects and their system counterpart must be identified uniformly, that’s not the case for aspects of symbolic representations which can be specified independently.

That two-pronged approach bridges the gap between analysis and design models, bringing about a…

View original post 1,724 more words