Notizen

|

Gliederung

When Things Talk To Things: Services Serving Services
| Dr.rer.nat. Hellmuth Broda Chief Technologist Europe, Middle East and Africa Member, Sun Vision Council Sun Microsystems Computers Hellmuth.Broda@Swiss.Sun.COM
Agenda
| What is Network Computing
| Evolution of HPC
| Internet and WEB
| Communication strategies
| JXTA
| Jini
What is Network Computing?
Waves of the Internet
Platform Evolution
Platform Evolution
Platform Evolution
Platform Evolution
Programming Environment
Thesis
Prediction
At the Platform
End of the Dark Ages?
The Renaissance: HPC Services on Superinternet Platforms
Interconnect BW Growth
Languages and Parallelism
Usage Model
Internet >> Web
Communication Strategies
Classical Client/Server
Peer to Peer
Project JXTA: The Expanded Web Challenges Current Access Models
Project JXTA’s Technology Enables Users To…
| Search the ENTIRE Web—and all its connected devices—for information or resources (deeper Web)
| Share compute services, files, music, etc. with anyone, regardless where they’re located or what type of device they’re using (pervasive networking)
| Store files and data anywhere on the network, not just to local hard drives (distributed networking
Project JXTA Strategy
| Incubate the project
| Technology
| Generalize the peer-to-peer (P2P) problem
| Solve key technical challenges (silos, security, scalability)
| Take a system view (ala UNIX Ò)
| Small, clean, simple
| Java Ô and non-Java support
| Collaborate early
| Business relationships to jump-start the market
| Open Source (sponsor/build the community)
JXTA Core Building Blocks
| Peer Groups
| Manages identity of peers and peer groups
| Join, Leave, Create
| Peer Pipes
| Send any content (code, data, etc.) to peers
| Messages in XML format
| Secure pipes supported
| Peer Monitoring
| Check peers’ status remotely, control remote peer behavior
| Meter peers’ usage, set usage or bandwidth limits
| Security
| Pluggable architecture supports a variety of standard security solutions
| Control group membership
| Encrypt data sent over pipes
JXTA Services
| Reusable, optional services used by P2P applications
| Built on JXTA Core
| Examples
| Distributed search
| Domain bridges (Web-P2P, Gnutella-JXTA)
| Real-time data streaming
| Reliable file transfers
| Real-time language translation
| Security extensions (finger print ID)
| Electronic payments
JXTA Applications
| Consumer file sharing (like Gnutella)
| Distributed processing (like SETI@home)
| Distributed data storage
| Communications (like Instant Messenger)
| “HPC” on mobile phone “clusters”?
Big Questions
| How rich does the set of network-supported services become?
| How can we interoperate without a PhD in networking?
The Answer
| Everything becomes a Network Service!
"Jini technology,"
| Jini technology, based on Java technology,
| enables digital services to simply connect together.
What is Jini?
| Software layer (48kB) to describe services to the net
| Runs on all Java Virtual Machines (JVM) on any device (from mainframe to toaster)
| Only the Front-End of the service is transmitted---Distributed Computing
| End of all Protocols as we know them
| Resilience: does not assume that networks always work
Jini Technology Enables You to Simply Connect
| Instant On
| Plug it in and it just works, no fuss, hassle free
| Impromptu community
| Create your personal community of devices and services — at home, in the office, or on the road — and interact with other communities quickly and easily
| Resilient
| Your Jini community maintains itself & adapts to change
| Your Jini community is always available
| The Service Age allows the system to be more tolerant and redundant
| Special delivery
| Services are available on demand
The Philosophy Behind Jini Technology
| Simplicity: Less is more
| Small code base
| No complicated OS
| Everything is an object
| Use RMI to extend objects to remote resources
| Self-healing networks
| System restores state after failures
| Resilience
| Community
| Easy access to Jini technology
| Anyone can join the Jini community
Jini Technology Principles
| Everything is an object
| Distributed system is just a distributed program
| Java Class Hierarchy describes devices/services
| Mobile Code via Remote Method Invocation
| Leasing and distributed garbage collection provides self-healing
| Individual devices/services can be simple, don’t require a Java Virtual Machine
| Services available on demand
Jini Technology Infrastructure: Discovery & Join
Jini Technology Infrastructure: Lookup Service
Jini Technology Infrastructure: Moving Code
Jini Technology Programming Model: Leasing
Jini Technology Programming Model: Transactions
Jini Technology Programming Model: Distributed Events
Jini Technology Infrastructure: Distributed Security
Jini Technology Services: JavaSpaces™ Technology
Jini™, how does it work?
Jini™, how does it work?
Customers
Quotes on Jini
| “We've taken the time to make it simple” - Bill Joy