CSCI 578 Software Architectures Dr. Chris Mattmann Tuesday, January 13, 2009.
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Transcript of CSCI 578 Software Architectures Dr. Chris Mattmann Tuesday, January 13, 2009.
Jan-13-09 CS578 CAM-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-13-09 CS578 CAM-3
General Class InformationLecture, 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 20 students• Not my limit, but DEN’s• Please ask questions, if you need
to
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General Class InformationSyllabus/Web Site:• http://sunset.usc.edu
/classes/cs578_2009b/• 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-13-09 CS578 CAM-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.
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Me
Graduated with my Ph.D. in Computer Science from USC in 2007• Advisor: Dr. Nenad Medvidovic
Was a student at USC from 1998-2007• B.S., Computer Science 2001• M.S., Computer Science 2003
My research interests• The intersection of software architectures,
and large-scale data dissemination• Software connector selection• Bayesian decision theory• Reinforcement learning• Search Engines
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My Other Day Job• National Aeronautics and Space
Administration (NASA)• Planetary Data System• Consultative Committee for Space Data
Systems (CCSDS)
• U.S. National Cancer Institute (NCI)• Early Detection Research Network
• NASA Jet Propulsion Laboratory• OCO Earth Science Mission• NPP Sounder PEATE Earth Science Mission• Computer Modeling Simulation and
Visualization Initiative• Climate Data eXchange• Virtual Oceanographic Data Center
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Software Architecture Research Problem
Content repositories are growing rapidly in sizeAt the same time, we expect more immediate dissemination of this dataHow do we distribute it…
•In a performant manner?•Fulfilling system requirements?
?NASA Planetary Data System
Archive Volume Growth
0
10
20
30
40
50
60
70
80
90
1990 1992 1994 1996 1998 2000 2002 2004 2006 2008
Year
TB (Accum)
TBytes
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Data Distribution Technologies
bbFTP
GridFTP
Aspera
HTTP/REST
RMI CORBA
SOAP
XML-RPC
Bittorrent
JXTA
UFTP
FTP
SFTP
SCP
Siena
GLIDE/PRISM-MW
Which one is the best one?
Given our current architecture?
Given our distribution scenarios and requirements?
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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-13-09 CS578 CAM-11
Overall Approach
Connector KB
Performance KB “Black Box” Guru
“White Box” Guru
Data System Architect
Data Distribution System Architecture