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 |
What is Network Computing | |
Evolution of HPC | |
Internet and WEB | |
Communication strategies | |
JXTA | |
Jini | |
The Renaissance: HPC
Services
on Superinternet Platforms
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 |
Incubate the project | ||
Technology | ||
Generalize the peer-to-peer (P2P) problem | ||
Solve key technical challenges (silos, security, scalability) | ||
Take a system view (ala UNIXŇ) | ||
Small, clean, simple | ||
JavaÔ and non-Java support | ||
Collaborate early | ||
Business relationships to jump-start the market | ||
Open Source (sponsor/build the community) |
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 |
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 |
Consumer file sharing (like Gnutella) | |
Distributed processing (like SETI@home) | |
Distributed data storage | |
Communications (like Instant Messenger) | |
“HPC” on mobile phone “clusters”? |
How rich does the set of network-supported services become? | |
How can we interoperate without a PhD in networking? | |
Everything becomes a Network Service! |
Jini technology, based on Java technology, | |
enables digital services to simply connect together. |
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 |
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
“We've taken the time to make it
simple” - Bill Joy |
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