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Sardes & other topicsJ.B Stefani -- INRIA Rhône-Alpes

Sardes is also a team within the IMAG/LSR Lab (CNRS-UJF-INPG)

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OutlineContext: Middleware projects at INRIASardes TeamVision & ChallengeProject objectivesResearch themesRecent resultsTechnology transferPositioning

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Middleware projects at INRIA

Theme 1A: Communicating systems: Distributed Systems and software architecture Aces, Arles, Compose, Jacquard, Oasis, Obasco, Sardes

Theme 1B: Communicating systems: Networks and telecoms Ares, Madynes

Theme 4B: Numerical systems: Grids and high-performance computing Apache, Grand Large, Paris, Graal

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Team Project Leader

J.B. Stefani, DR INRIA (on leave, Corps des Télécommunications) Permanent Staff INRIA

D. Hagimont, CR INRIA A. Schmitt, CR INRIA

Permanent Staff Universities F. Boyer, MC, UJF S. Bouchenak, MC, UJF N. De Palma, MC INPG S. Jean, MC UPMF S. Krakowiak, PR, UJF J. Mossière, PR, INPG

7 PhD Students

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Vision Self-managed distributed systems

self-configurable, self-monitoring, self-repairing Spanning different scale ranges

smart dust to grids Continuously adapting

internal and external changes Ubiquitous

large geographical dispersion, mobility Dependable

available, secure, etc. Meaningful

environment, context, intentions

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Challenge

Building highly configurable and manageable distributed systems System engineering

programming & system models run-time & linguistic support architectural patterns and frameworks

Autonomous systems management distributed monitoring distributed configuration management fault and performance management

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Project objectives

To develop a rigorous, reflective component basis for the construction of self-configurable and self-manageable systems

To develop distributed software infrastructures (operating system, middleware) for autonomic distributed systems

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Research themes

Main research themes: Reflective component technology Autonomous systems management

Applications areas: high-availability J2EE servers dynamic monitoring, configuration and resource

management in large scale distributed systems (e.g. Grids)

embedded systems, ubiquitous computing

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Aside: Exo-kernel middleware A view of the OW Long term code base

4 strata towards a middleware exo-kernel no predefined functionality, not software layers

Stratum #1: Components lightweight, reflective component model (Fractal) common set of tools for static and dynamic code generation and adaptation

Stratum #2 : Architectural Frameworks pattern-based architectural frameworks for hard recurring issues naming, types and meta-data communications monitoring and failure detection resource management distributed configuration management

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Aside: Exo-kernel middleware Stratum #3: Clusters of distributed system services

P2P indexing and routing Asynchronous communication services Transactions & Orchestration Configuration and Resource Management High-availability support Persistency support Distributed queries etc

Stratum #4: Integrated platforms and standards-compliant personalities

J2EE Web services OGSI CORBA etc

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Research themes Reflective component technology

Models and foundations higher-order process calculi for distributed component-based

programming open problems:

– behavioral theory; component sharing; failures & recoverable actions; multi-stage distributed programming

Support for component-based programming component models architecture description languages extensible & retargettable toolset open problems:

– dynamicity in ADLs; support for dynamic reconfiguration; type systems for safe component-based programming; on-line & reversible optimization

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Research themes

Autonomous systems management Distributed configuration management

software deployment, distributed reconfiguration open problems:

– handling multiple versions, partial failures, distributed component dependencies; automatic, multi-level system cartography; orchestrating deployment and reconfiguration in large scale systems

Automated performability management System monitoring, performability management open problems:

– causality analysis & multi-level resource accounting; resource virtualization; automatic fault detection; identification for system performance; management of performability service level agreeements

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Sample ongoing works & resultsSoftware component technology

Fractal reflective component model [CBSE 04] software architecture with selective reflection co-developped with FTR&D available at: http://fractal.objectweb.org

Process calculi foundations for distributed component-based programming

M-calculus [POPL 03], Kell calculus [GC 04] equivalences, type systems and abstract machines for

higher-order calculi with process passivation

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Sample ongoing works & results Software infrastructures

Autonomous J2EE repair management: Jade [SRDS 05] Fractal-based framework for configuration and repair management

in J2EE app. server clusters Reflective component-based middleware framework: Dream [RM

04] Fractal-based framework for the construction of dynamically

configurable, resource-aware middleware Component-based operating systems: Think [Usenix 02]

Fractal-based framework and library for the construction of secure, dynamically configurable operating system kernels

co-developed with FTR&D & ST Microelectronics available at: http://think.objectweb.org

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System management loopscomponent-based approach

system model using components systematic construction of supervision loops

Managed system

Sensor

Analysis Decision

Actuator

Notification transport Command transport

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J2EE clustersMulti-tier structure

web tier servlet/JSP container EJB container database tier

Internet

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Autonomic J2EE clusterssupervision loops use cases

admission control dynamic sizing dynamic load balancing failure detection and reconfiguration

Internet

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Technology transfer

Mainly through the ObjectWeb open source consortium efficient distribution channel real-world applications positive feedback framework for cooperation Sardes personnel participation

J.B. Stefani: INRIA Board representative and past Board Chairman

Sardes contributions (past & present): C-JDBC, Dream, Fractal, JOnAS clustering, JMOB (CLIF,

RUBIS),Think

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Industrial relations France Telecom R&D

Fractal component model Think component-based OS Distributed configuration management

ST Microelectronics Think for SoC/NoC

Bull Component-based J2EE servers J2EE management

Scalagent Component-based asynchronous middleware Distributed systems management

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Project positioningMain assets of the project

combination of concurrent programming language semantics & distributed systems engineering

development and use of original reflective software component technology

systems engineering technology encompassing different systems layers (OS & middleware)

emphasis on distributed systems management strong involvement in ObjectWeb