1. CSCI 578 Software Architectures
Dr. Chris Mattmann
Tuesday, January 10, 2012

2. The Class
Will give you a complete treatment of the area of software architecture
The fundamental building blocks of software systems
Components (units of computation)
Connectors (interactions between the software components)
Configurations (arrangements of components and connectors)
Will equip you with the necessary skills to design complex, real-world software
Jan-10-12
CS578

3. General Class Information
Lecture, but…
You can participate
You should participate
You will participate, that is, if you want to do well :)
On-campus, and remote (DEN) sections
DEN section capped at 22 students
Not my limit, but DEN’s
Please ask questions, if you need to
Jan-10-12
CS578

4. General Class Information
Syllabus/Web Site:
Visit it often, as the schedule may change!
This is where all of your homework assignments will be posted
This site will point you to required reading, and to lectures that you can download before class
Jan-10-12
CS578

5. What We’ll Cover The entire spectrum of software architecture
Where it fits in the overall software engineering process -- it’s the linchpin!
Software architectural styles, product line architectures, components, connectors, implementation frameworks, middleware, non-functional properties, visualization, the role of the architect…lots of topics!
Topical research in software architecture
(Optional) papers, data-intensive systems, etc.
Jan-10-12
CS578

6. Me Graduated with my Ph.D. in Computer Science from USC in 2007
Advisor: Dr. Nenad Medvidovic
Was a student at USC from
B.S., Computer Science 2001
M.S., Computer Science 2003
My research interests
Open Source Software, Apache Software Foundation
The intersection of software architectures, and large-scale data dissemination
Information Retrieval
Search Engines – I’m teaching a class, CS572, on this topic during Summer 2012
Jan-10-12
CS578

7. My Other Day Job National Aeronautics and Space Administration (NASA)
Earth Science Data Systems Working Groups
Planetary Data System
U.S. National Cancer Institute (NCI)
Early Detection Research Network
NASA Jet Propulsion Laboratory
ACOS, OCO-2, SMAP, NPP Sounder PEATE Earth Science Missions
Snow Hydrology for the Western United States and Alaska
CO2 Data Portal
Regional Climate Modeling, U.S. National Climate Asessments
Jan-10-12
CS578

8. Software Architecture Research Problem?
Content repositories are growing rapidly in size
At the same time, we expect more immediate dissemination of this data
How do we distribute it…
In a performant manner?
Fulfilling system requirements?
Jan-10-12
CS578

9. Data Distribution Technologies
XML-RPC
Given our current architecture?
UFTP
Siena
GridFTP
bbFTP
Which one is the best one?
FTP
Aspera
CORBA
RMI
Given our distribution scenarios and requirements?
SOAP
Bittorrent
SFTP
HTTP/REST
JXTA
SCP
GLIDE/PRISM-MW
Jan-10-12
CS578

10. Architectural Decisions
Architectural decisions (such as connector selection) impact functional and non-functional properties of the overall data distribution system architecture
It does matter what connector you select
Functional (performance)
Efficiency, consistency, scalability, dependability of the data transfer
Non-functional (e.g., interoperability, security)
We assert that this process has largely remained an art form and forces organizations to rely on organizational gurus whose knowledge is never encoded or understood
Jan-10-12
CS578

11. Data Distribution System Architecture
Overall Approach
“White Box” Guru
Connector KB
Data Distribution System Architecture
Data System Architect
Jan-10-12
CS578
Performance KB
“Black Box” Guru

12. So, today… Be ready to get going on Thursday
You’re free to enjoy the day
Course book
(Possible) Reading assignment
Chapter 1: The Big Idea
Be ready to get going on Thursday
Jan-10-12
CS578