490dp Introduction

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490dpIntroduction

• Robert Grimm

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The Computer for the 21st Century

• The most profound technologies are those that
  disappear. They weave themselves into the fabric
  of everyday life until they are indistinguishable
  from it.
  Mark Weiser

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Pervasive Computing

• Vision Shift in focus to users and their tasks
• Embodied virtuality
• Enabled by ubiquitous smart devices
• Tabs, pads, boards
• Required technology
• Cheap, low-power computers
• Software for ubiquitous applications
• Network to tie them all together

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Our Focus

• We assume
• Computers
• Network
• We build applications

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Attending a Meeting

• Shared repository
• Exchange notes etc. during the meeting
• Capture audio and video
• Provide archive after meeting
• Functionality highlights
• List of participants based on their devices
• Newly added documents sent to repository
• Archive distributed to participants

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Attending a Meeting

• Technical issues
• Location of repository
• One location vs. replicated locations
• In infrastructure vs. on participants devices
• Routing of documents
• To repository
• To all participants

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Attending a Meeting

• Change in focus
• During the meeting, functionality counts
• After meeting, the artifact counts

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490dp Goals and Objectives

• Design, build, and evaluatedistributed /
  pervasive applications
• Build a working application
• Gain experience with complex systems
• Work together in groups
• Communicate clearly
• Consistently work towards a goal

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How to get there

• Two teams
• One application per team
• Two sub-teams per team
• One implementation per sub-team
• Java, RMI, Jini, JavaSpaces,T Spaces, JDBC
• one.world

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How to get there

• Seven lectures
• Jump-start application building process
• Design report and presentation
• Your plan
• Weekly meetings
• Your status updates
• Q A
• Final report and presentation
• Your results

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Lectures

• Challenges
• Why is it so hard to builddistributed or
  pervasive applications?
• Java object serialization
• How to turn objects into bytes
• Tuples
• How to represent, store, and communicate data

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Lectures

• Synchronous vs. asynchronous invocation
• How to get things done
• Remote invocation
• How to get things done on another node
• Resource control
• How to keep track of consumed resources
• Check-pointing and migration
• How to save and move entire applications

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Lectures

• Required readings
• You must read them before lecture
• We will send out a summaryone or two days before
  lecture
• Background readings
• Additional background or context
• Reference readings
• Useful for actually building applications

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Two Platforms

• Java etc.
• Established systems
• Fully implemented
• Loosely integrated
• Lots of outside users

• one.world
• Research system
• Incomplete, buggy
• Highly integrated
• Local experts

• Common abstractions and services
• Tuples
• Events
• Leases
• Transactions
• Discovery

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Qualitative Evaluation

• What was easy / hard?
• What worked / what didnt work?
• Why?
• Help others learn from you

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Quantitative Evaluation

• Time spent
• Track from beginning
• Break down by activity
• Design, implementation, debugging, write-up
• Code statistics
• Source code
• Total of lines
• Non-commenting source statements
• Abstractions
• of methods of classes
• Binaries

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Quantitative Evaluation

• Performance
• Basic operations
• Scalability
• Over users
• Over nodes

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Rules of Engagement

• Attendance mandatory
• By team
• Design, write-up
• By sub-team
• Implementation, debugging, demo
• Help each other with
• Set-up
• Pointers to technical resources
• General questions

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Resources

• People
• Robert Grimm, Eric Lemar, Adam Macbeth
• Other students
• Books
• Oaks Wong. Jini in a Nutshell. OReilly 2000.
• Internet
• java.sun.com
• www.jini.org
• one.cs.washington.edu

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This course is experimental!

• You have a great opportunity
• Use cutting edge system technologies
• Build real pervasive applications
• The ride will not always be smooth
• We need your feedback early and often
• You need to take initiative
• Work through tutorials, specs on your own
• Help each other

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Break
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Administrivia

• Signup
• Office hours
• Monday, Wednesday, Friday
• What times work for you?
• Final

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Teams and Applications

• Introductions
• Discussion