1. COMP 4000/5102 An Analysis of Two Commercial Distributed Environments Orhan K AKYILDIZ 100768189

2. What? I will try to develop an analysis of two pragmatic commercial distributed environments. These environments are used as enablers of communication product offerings, as such, these are very targeted implementations. These environments, S, and T, come from the same set of designers, but is now owned by two different startups in the US.

3. What? S S, developed in mid 90s, is used as a framework to implement a distributed signalling system 7 (a highly popular signalling system in POT networks) stack. Supported on many Unices:  Solaris  AIX  Linux  HP-UX Used by some of the tier-1 telecom operators in North America, and Europe.

4. What? S (..ctd)‏ Features: Software implementation  Distributed shared memory (user-space)\  Distributed kernel memory  Distributed record management  Configurable and quasi-adaptive environment  Fault-tolerant architecture. Kernel implementation No patches / changes to existing kernel modules (not hooked up to Unix VM)‏

5. What? T Designed and implemented in early 2000s. Used as an enabler to a OMA (Open Mobile Alliance) features on wireless networks, like location services, SMS, ring tones etc. Platform portable – Java Functionality portable:  Can be built as a user space application,  Or as kernel modules. (Remember Inferno).

6. What? T (..ctd)‏ Features Software Implementation  Distributed objects  Fault tolerant client/server model  Core modules (10%) implemented in C.  Services implemented in Java  Not hooked up to any other kernel systems (memory manager, etc.)‏

7. Why do I care? I was familiar with the designs, and wanted to look into it closer (with whatever knowledge I gathered in this class). Together they touch most of the basic ideas that we have been studying (except file systems) An evolution in some sense Access to candid evaluation and cross evaluation.. What can “startup pragmatism” do to your design?

8. What is missing? Problems with the Project... No Identifying information  BIG PROBLEM for the final paper  How do you refer to the work without identifying it?  What good is a project paper with no references! Alternatives:  Make a literature search, and use these as use- cases.  Add one (two?) projects from academia, and work on: Academia versus “start-up”