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Replication Management in Reliable Real-Time Systems

Luís Miguel Pinho, Francisco Vasques, Andy Wellings
2004 Real-time systems  
However, the recent trend for incorporating pre-emptive multitasking applications in reliable real-time systems inherently increases its complexity.  ...  Within the DEAR-COTS architecture, the hard real-time subsystem provides a framework for the development of reliable real-time applications, which are the core of DCCS applications.  ...  In this case it is a``not to use before'' rather than a``not to use after''.  ... 
doi:10.1023/b:time.0000018248.18519.46 fatcat:f7fz7vehdjfenarxpogsq2tlhe

Distributed Computer-Controlled Systems: The Dear-COTS Approach 1

P. Veríssimo, A. Casimiro, L. Rodrigues, L.M. Pinho, E. Tovar, F. Vasques
2000 IFAC Proceedings Volumes  
This paper proposes a new architecture targeting real-time and reliable Distributed Computer-Controlled Systems (DCCS).  ...  However, the use of COTS components and the integration, in the same environment, of hard real-time and soft or non real-time applications introduces new problems.  ...  HRTS Communication Manager The Communication Manager layer is responsible for the adequate communication services, providing a reliable and timely transfer of real-time data.  ... 
doi:10.1016/s1474-6670(17)36739-3 fatcat:nms7nvzga5g3nfp7liq3nknvui

Strategies for Reliable, Cloud-Based Distributed Real-Time and Embedded Systems

Kyoungho An
2012 2012 IEEE 31st Symposium on Reliable Distributed Systems  
Timeliness in data-center networks 3. Real-time scheduling in hypervisors 4. High availability via replication of virtual machines.  ...  D^2TCP • Reducing deadline miss ratio • Real-time scheduling in hypervisors 1. RT-Xen • 4 Fixed priority real-time schedulers used in Xen 2.  ... 
doi:10.1109/srds.2012.69 dblp:conf/srds/An12 fatcat:7hixo4ufrrewnatiawoylaryx4

Reconfiguration Strategies for Critical Adaptive Distributed Embedded Systems

Alberto Ballesteros, Julian Proenza, Manuel Barranco, Luis Almeida
2018 2018 48th Annual IEEE/IFIP International Conference on Dependable Systems and Networks Workshops (DSN-W)  
This paper describes the architecture and mechanisms proposed in the context of the DFT4FTT project for implementing Adaptive Distributed Embedded Systems (ADESs), that is, distributed systems with real-time  ...  with real-time, dependability and adaptivity requirements.  ...  In this sense, tasks can have different real-time and reliability requirements, inherited from the application they belong to.  ... 
doi:10.1109/dsn-w.2018.00028 dblp:conf/dsn/BallesterosPB018 fatcat:inzvmi3adrhkte5dp5lexvabvu

Reliable Power Monitoring System Based on Real-Time and Fault-Tolerant CORBA

Hongjian LIAO, Yawu XU
2013 Sensors & Transducers  
This model was used in the network communication layers of multiple power monitoring systems, and the results shows that the model is safe and reliable with real-time response.  ...  On this basis, the model of real-time and fault-tolerance middleware in the power monitoring system was designed and realized with these methods.  ...  real-time and reliable transmission of the data collected: 1) Real-time property, i.e., the basic data obtained shall be transmitted in time to the algorithm module of the monitor end for processing and  ... 
doaj:9f6dda7a65cb443f8786cbb95bf66cc8 fatcat:clxgzvek5vfgzoxd7zqdlpqvb4

Designing an Adaptive Fault Tolerance Structure in Distributed Real Time Systems

N. Mosharraf, M.R. Khayyambashi
2009 Journal of Applied Sciences  
role in improved performance and making it adaptive to real time distributed system have been reviewed.  ...  With widespread use of distributed system in various applications, having fault tolerance structure is a significant property and this is while it makes more sense in designing of real time distributed  ...  In fact, predictability is considered as a major specification in real time system, while in a system with reliability and fault tolerance, a program should be recovered and be continued in the presence  ... 
doi:10.3923/jas.2009.1114.1120 fatcat:gnc7sbmvqrbetdnhvfg3xxmf3u

Transparent Environment for Replicated Ravenscar Applications [chapter]

Luís Miguel Pinho, Francisco Vasques
2002 Lecture Notes in Computer Science  
Section 4 presents the framework for replication management intended for the support to the system applications, while the proposed set of task interaction objects is presented in Section 5.  ...  These objects provide the usual task interaction mechanisms used in hard real-time applications, and allow applications to be developed without considering replication and distribution issues.  ...  Acknowledgements The authors would like to thank Andy Wellings for his valuable support in the specification of the replication framework and to the anonymous reviewers for their helpful comments and suggestions  ... 
doi:10.1007/3-540-48046-3_23 fatcat:hosdeylqungspjnml4zxenwxwe

ERMS: An Elastic Replication Management System for HDFS

Zhendong Cheng, Zhongzhi Luan, You Meng, Yijing Xu, Depei Qian, Alain Roy, Ning Zhang, Gang Guan
2012 2012 IEEE International Conference on Cluster Computing Workshops  
In this paper, we describe ERMS, an elastic replication management system for HDFS. ERMS provides an active/standby storage model for HDFS.  ...  HDFS provides high performance, reliability and availability by replicating data, typically three copies of every data. The data in HDFS changes in popularity over time.  ...  The Data Judge Module obtains system metrics from HDFS clusters and uses CEP to distinguish current data types in real-time.  ... 
doi:10.1109/clusterw.2012.25 dblp:conf/cluster/ChengLMXQRZG12 fatcat:lht766l5knb4jennanzzlyg6dq

MEAD: support for Real-Time Fault-Tolerant CORBA

P. Narasimhan, T. A. Dumitraş, A. M. Paulos, S. M. Pertet, C. F. Reverte, J. G. Slember, D. Srivastava
2005 Concurrency and Computation  
MEAD supports transparent yet tunable fault tolerance in real-time, proactive dependability, resource-aware system adaptation to crash, communication and timing faults with bounded fault detection and  ...  The OMG's Real-Time CORBA (RT-CORBA) and Fault-Tolerant CORBA (FT-CORBA) specifications make it possible for today's CORBA implementations to exhibit either real-time or fault tolerance in isolation.  ...  04-01-0238 ('Increasing Intrusion Tolerance Via Scalable Redundancy'), the Army Research Office grant DAAD19-01-1-0646, and grant number DAAD19-02-1-0389 ('Perpetually Available and Secure Information Systems  ... 
doi:10.1002/cpe.882 fatcat:mvnh3g7e4vatphkfd6tw5hf36e

A Custom Approach for a Flexible, Real-Time and Reliable Software Defined Utility

Agustín Zaballos, Joan Navarro, Ramon Martín De Pozuelo
2018 Sensors  
alternative to expensive hardware-based systems by offering fine-grained modularity, maintainability and unified management in time-restrictive large-scale systems.  ...  integration, automation, real-time reconfiguration and resource reusability.  ...  Joan Navarro led the development of the HCDM system, replication policies, and the experimental evaluation.  ... 
doi:10.3390/s18030718 pmid:29495599 pmcid:PMC5876631 fatcat:bnituf4ia5cdpjbtdvtqseujbu

Towards Real-Time Fault-Tolerant CORBA Middleware

Aniruddha S. Gokhale, Balachandran Natarajan, Douglas C. Schmidt, Joseph K. Cross
2004 Cluster Computing  
processing in real-time [8, 9].  ...  The Object Management Group (OMG), which standardizes CORBA, has addressed many of these application requirements individually in the Real-time CORBA (RT-CORBA) and Fault-tolerant CORBA (FT-CORBA) specifications  ...  to the ACTIVE replication style in providing real-time and fault-tolerance support to DRE systems.  ... 
doi:10.1023/b:clus.0000039493.73008.13 fatcat:3chjgnjovfeqpemwvxu7wvvwwq

Reliability Framework for Cloud Virtual Nodes using Fault Tolerance Techniques

2019 International Journal of Engineering and Advanced Technology  
This real time system takes benefits of scalable virtualized environment and intensive cloud computing capabilities for executing real time tasks.  ...  Since cloud computing has numerous benefits and demands, it is much efficient performing real time computing in cloud infrastructure.  ...  Supporting real time system on the cloud infrastructure is a significant part in today's world because of numerous usage of real time systems everywhere.  ... 
doi:10.35940/ijeat.b2502.109119 fatcat:tswg2lvnkjgazezjd3f45ywdlq

A Novel Cost-Effective Dynamic Data Replication Strategy for Reliability in Cloud Data Centres

Wenhao Li, Yun Yang, Dong Yuan
2011 2011 IEEE Ninth International Conference on Dependable, Autonomic and Secure Computing  
While in current Cloud systems, typical 3replicas data replication strategies are applied for data reliability, in this paper we propose a novel cost-effective dynamic data replication strategy which facilitates  ...  an incremental replication method to reduce the storage cost and meet the data reliability requirement at the same time.  ...  ACKNOWLEDGEMENTS The research work reported in this paper is partly supported by Australian Research Council under Linkage Project LP0990393 and Discovery Project DP110101340, as well as State Administration  ... 
doi:10.1109/dasc.2011.95 dblp:conf/dasc/LiYY11 fatcat:34nhgk3ipzhmtin6saofhsvnay


Luís Miguel Pinho, Francisco Vasques
1998 ACM SIGAda Ada Letters  
Keywords Ada 95, Real-Time Systems, Software Based Fault Tolerance, Off-The-Shelf Components.  ...  This paper presents an architecture (Multi-µ) being implemented to study and develop software based fault tolerant mechanisms for Real-Time Systems, using the Ada language (Ada 95) and Commercial Off-The-Shelf  ...  In a real-time system, as the time resource is scarce, structural replication is the preferred one.  ... 
doi:10.1145/301687.289532 fatcat:ncqjlsm3mnaqpekk3itzdqtk4q

RX-NAS: A Scalable, Reliable Clustered NAS System

Yoshiko Yasuda, Shinichi Kawamoto, Atsushi Ebata, Jun Okitsu, Tatsuo Higuchi, Naoki Hamanaka
2005 IPSJ Digital Courier  
The core feature of RX-NAS, namely on-line replication, replicates original file objects to new sets of X-NASs for each file block in real-time without changing clients' environments.  ...  RX-NAS (Replicated eXpandable Network-Attached Storage), a scalable, reliable clustered NAS system designed for entry-level NAS, has been developed.  ...  All file objects can thus be replicated in real-time for each NFS operation.  ... 
doi:10.2197/ipsjdc.1.1 fatcat:bmgrk37j7ngi5dnpxu3yvmvwom
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