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Anthony Gelibert - LIG Grenoble OSGi and Terracotta: State replication of clustered services
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Anthony Gelibert - LIG Grenoble
OSGi and Terracotta: State replication of clustered
services
September 2010 GELIBERT – OSGi and Terracotta: Repliation of states for clustered services 2
Agenda• Context
• Terracotta
• OSGi and Terracotta
• Future work
September 2010 GELIBERT – OSGi and Terracotta: Repliation of states for clustered services 3
Agenda
•Context• Terracotta
• OSGi and Terracotta
• Future work
September 2010 GELIBERT – OSGi and Terracotta: Repliation of states for clustered services 4
About
• Anthony Gelibert– MSc at Master of Science in Informatics
at Grenoble (2010)– Engineer Degree at École Nationale
Supérieure d’Informatique et de Mathématiques Appliquées de Grenoble (2010)
September 2010 GELIBERT – OSGi and Terracotta: Repliation of states for clustered services 5
OSGi and distribution
• Distributed execution:– R-OSGi (Research)– OSGi Remote Services (Specification)
• Distributed deployment:– OSGi4C (Research)
• Shared Memory : our approach
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OSGi and distribution (cont.)• R-OSGi:
– Transparently invoke distant services– RMI-like
• OSGi4C:– Distributed bundle deployment– Runs locally
• Terracotta:– Shared memory
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Objective
September 2010 GELIBERT – OSGi and Terracotta: Repliation of states for clustered services 8
Use cases• Traditional targets of distributed
shared memory:– State share, Message bus, …
• Problems requiring the use of distributed methods.
• Re-engineering of existing solutions.
September 2010 GELIBERT – OSGi and Terracotta: Repliation of states for clustered services 9
Agenda• Context
•Terracotta• OSGi and Terracotta
• Future work
September 2010 GELIBERT – OSGi and Terracotta: Repliation of states for clustered services 10
Terracotta: N.A.M.• Network-Attached Memory• No API• No Serialization• Cross-JVM coordination• Distributed Method Invocations• Runtime monitoring and control
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Terracotta: configuration• No API: declarative configuration
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Teracotta: no serialization
• Plain POJO clustering
• Dynamic instrumentation through a Java Agent
• Fine-grained replication
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Terracotta: D.M.I
• Distributed Method Invocations.• When a node calls a method, all
nodes replicate it (locally). • Development close to MPI:
– The same code is executed at the same time on each node.
– Requires distinguishing each element.
September 2010 GELIBERT – OSGi and Terracotta: Repliation of states for clustered services 14
Agenda• Context
• Terracotta
•OSGi and Terracotta• Future work
September 2010 GELIBERT – OSGi and Terracotta: Repliation of states for clustered services 15
OSGi and Terracotta: Toolchain• Delegate class loading from OSGi to
Terracotta.
• A set of Java 5 Annotations.
• An APT processor to generate the Terracotta config file.
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Toolchain (cont.)
September 2010 GELIBERT – OSGi and Terracotta: Repliation of states for clustered services 17
Toolchain (cont.)
September 2010 GELIBERT – OSGi and Terracotta: Repliation of states for clustered services 18
Validation• EventAdmin: propagation of events
across multiple platforms.• Cilia: replication/persistence in
pervasive applications.• H-Omega: Replacement of message
passing by a shared memory.• uGASP: State share for a DTN
application
September 2010 GELIBERT – OSGi and Terracotta: Repliation of states for clustered services 19
Agenda• Context
• Terracotta
• OSGi and Terracotta
•Future work
September 2010 GELIBERT – OSGi and Terracotta: Repliation of states for clustered services 20
Future work
• Extension of the container:– Enhancement Terracotta integration– Add persistence, cache, …
• Dynamically update clustered services at run-time
September 2010 GELIBERT – OSGi and Terracotta: Repliation of states for clustered services 21
For more information• Terracotta
Documentation, download, …http://www.terracotta.orgOpen Sourcehttp://www.terracotta.org/open-source
• Felixhttp://felix.apache.org
• Chameleonhttp://wiki.chameleon.ow2.org
•
September 2010 GELIBERT – OSGi and Terracotta: Repliation of states for clustered services 22
THANK YOU FOR YOUR ATTENTION!
Contact: [email protected]
