An Architecture for Self-healing Autonomous Object Groups
Jgroup/ARM is a middleware for developing and operating dependable distributed Java applications. Jgroup integrates the distributed object model of Java RMI with the object group paradigm, enabling construction of replicated servers that offer dependable services to clients. ARM aims to improve the dependability characteristics of systems through fault treatment, focusing on operational aspects where the gain in terms of improved dependability is likely to be the greatest. ARM offers two core mechanisms: recovery from node, object and network failures and distribution of replicas. ARM identifies failures and reconfigures the system according to its dependability requirements.
This paper proposes an enhancement of the ARM framework in which replica placement is performed in a distributed manner, eliminating the need for a centralized manager with global information about all object groups. Instead each autonomous object group handles their own replica placement based on information from nodes. Assuming that multiple objects groups are deployed in the system, this constitutes a distributed replica placement scheme. This scheme enables the implementation of self-healing object groups that can perform fault treatment on themselves. Advantages of the approach: (a) no need to maintain global information about all object groups which is costly and limits scalability, (b) reduced infrastructure complexity, and (c) less communication overhead.
KeywordsRecovery Action Fault Treatment Object Factory Target Environment Object Group
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- 1.Amir, Y., Danilov, C., Stanton, J.: A Low Latency, Loss Tolerant Architecture and Protocol for Wide Area Group Communication. In: Proc. Int. Conf. on Dependable Systems and Networks, New York (2000)Google Scholar
- 2.Montresor, A.: System Support for Programming Object-Oriented Dependable Applications in Partitionable Systems. PhD thesis, Dept. of Computer Science, University of Bologna (2000)Google Scholar
- 4.Ban, B.: JavaGroups – Group Communication Patterns in Java. Technical report, Dept. of Computer Science, Cornell University (1998)Google Scholar
- 6.Meling, H.: Adaptive Middleware Support and Autonomous Fault Treatment: Architectural Design, Prototyping and Experimental Evaluation. PhD thesis, Norwegian University of Science and Technology, Dept. of Telematics (2006)Google Scholar
- 7.Meling, H., Montresor, A., Helvik, B.E., Babaoğlu, Ö.: Jgroup/ARM: A Distributed Object Group Platform with Autonomous Replication Management. Technical Report No. 11, University of Stavanger (2006)Google Scholar
- 9.Sloman, M.: Policy driven management for distributed systems. Journal of Network and Systems Management 2 (1994)Google Scholar
- 10.Murch, R.: Autonomic Computing. On Demand Series. IBM Press (2004)Google Scholar
- 11.Solarski, M., Meling, H.: Towards Upgrading Actively Replicated Servers on-the-fly. In: Proc. Workshop on Dependable On-line Upgrading of Distributed Systems in conjunction with COMPSAC 2002, Oxford, England (2002)Google Scholar
- 12.Powell, D.: Distributed Fault Tolerance: Lessons from Delta-4. IEEE Micro 36–47 (1994)Google Scholar
- 14.Object Management Group: Fault Tolerant CORBA Specification. OMG Document ptc/00-04-04 (2000)Google Scholar
- 15.Meling, H.: An Architecture for Self-healing Autonomous Object Groups. Technical Report No. 21, University of Stavanger (2007)Google Scholar
- 16.Helvik, B.E., Meling, H., Montresor, A.: An Approach to Experimentally Obtain Service Dependability Characteristics of the Jgroup/ARM System. In: Proc. Fifth European Dependable Computing Conference (2005)Google Scholar
- 18.Natarajan, B., et al.: DOORS: Towards High-performance Fault Tolerant CORBA. In: Proc. 2nd Int. Symp. Distributed Objects and Applications (2000)Google Scholar
- 19.Reverte, C.F., Narasimhan, P.: Decentralized Resource Management and Fault-Tolerance for Distributed CORBA Applications. In: Proc. 9th Int. Workshop on Object-Oriented Real-Time Dependable Systems (2003)Google Scholar
- 20.Meling, H., Helvik, B.E.: ARM: Autonomous Replication Management in Jgroup. In: Proc. 4th European Research Seminar on Advances in Distributed Systems, Bertinoro, Italy (2001)Google Scholar