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Distributed Real-Time Databases [chapter]

Ragunathan Rajkumar
1991 Synchronization in Real-Time Systems  
Vreven van Rabofacet alleen in het begin dee! aan ons gebruikerscommittee. In die eerste fase hebben ze bijdragen geleverd die terug te vinden zijn in dit proefschrift.  ...  bijgedragen aan de ideeen in dit proefschrift.  ...  Off-line database scheduling Off-line, hard real-time scheduling systems are used in safety critical systems with real-time demand>,. Their real-time behavior has to be totally predictable.  ... 
doi:10.1007/978-1-4615-4000-7_4 fatcat:za4jxrd6gfalhjgwzq2r5qg5em

Runtime monitoring of timing constraints in distributed real-time systems

Farnam Jahanian, Ragunathan Rajkumar, Sitaram C. V. Raju
1994 Real-time systems  
In this paper, we describe a run-time environment for monitoring of timing constraints in distributed real-time systems.  ...  We characterize a sub-class of timing constraints that occur commonly in distributed real-time systems and whose message requirements can be minimized.  ...  Acknowledgements We would like to thank Alan Shaw for his comments on an earlier draft of this paper, We would also like to thank the reviewers of a shorter version of this paper that appeared in the 13th  ... 
doi:10.1007/bf01088521 fatcat:ehygl3vokrhmrdtrnio3i5gh2u

Using Real-Time Java in Distributed Systems: Problems and Solutions [chapter]

Pablo Basanta-Val, Jonathan Stephen Anderson
2011 Distributed, Embedded and Real-time Java Systems  
Many real-time systems are distributed, i.e. they use a network to interconnect different nodes.  ...  To date, the real-time Java community has produced the DRTSJ (The Distributed Real-Time Specification for Java), though a wide variety of other distributed real-time Java efforts exist.  ...  Acknowledgements This work was supported in part by the iLAND Project (100026) of Call 1 of EU ARTEMIS JU and also in part by ARTISTDesign NoE (IST-2007-214373) of the EU 7th FP programme.  ... 
doi:10.1007/978-1-4419-8158-5_2 fatcat:u2wvei4rxjeajelusqg75dn4qi

Analytic evaluation of contention protocols used in distributed real-time systems

Kang Shin, Chao-Ju Hou
1995 Real-time systems  
Using Pdyn and Te, we comparatively evaluate four contention protocols often used in distributed real-time systems: (i) the token passing protocol and its priority-based variation (called the token scheduling  ...  Due to their potential for high performance and high reliability, distributed computing systems are being used for an increasing number of real-time applications which execute computational tasks.  ...  Although these average measures provide a useful yardstick for system performance, they are inadequate in assessing real-time performances, since the timing requirement of each individual task/message  ... 
doi:10.1007/bf01094173 fatcat:txioxgibvjdlrazptsa5jxrcbm

On Structural Robustness of Distributed Real-Time Systems Towards Uncertainties in Service Times

Praveen Jayachandran, Tarek Abdelzaher
2010 2010 31st IEEE Real-Time Systems Symposium  
As real-time systems are becoming increasingly distributed, it becomes important to understand their structural robustness with respect to timing uncertainty.  ...  Hence, the approach is important for soft real-time systems, systems where timing uncertainty exists, or where worst-case timing is not entirely verified.  ...  Such large and complex distributed systems typically execute soft real-time applications, where there is significant uncertainty in the execution times of tasks on individual resources, or the worstcase  ... 
doi:10.1109/rtss.2010.9 dblp:conf/rtss/JayachandranA10 fatcat:ct4szzul45e7nayxb4rwqq2o6i

Real time resource allocation in distributed systems

John Reif, Paul Spirakis
1982 Proceedings of the first ACM SIGACT-SIGOPS symposium on Principles of distributed computing - PODC '82  
For Section 3 we require a Distributed Communication System (DCS) as defined above with a distributed real time probabilistic scheduler.  ...  It is interesting to note (as we show in Section 3) that one can implement also a real time RGS by a real time distributed communication subsystem. 3.  ... 
doi:10.1145/800220.806685 dblp:conf/podc/ReifS82 fatcat:77nqiw3wq5ccxjnzpj2oxs3eoi

Maintaining data temporal consistency in distributed real-time systems

Jiantao Wang, Song Han, Kam-Yiu Lam, Aloysius K. Mok
2012 Real-time systems  
be an efficient scheme for maintaining temporal consistency of real-time data objects, is applied in a distributed real-time system environment.  ...  However, this assumption does not hold in distributed real-time systems where the jitters of the update jobs can be large and change unpredictably with time.  ...  However, this assumption is not practical in distributed real-time systems.  ... 
doi:10.1007/s11241-012-9150-4 fatcat:dzwbbu6idrdnlbqzpln5uoxfpq

Real-Time Coordination in Distributed Multimedia Systems [chapter]

Theophilos A. Limniotes, George A. Papadopoulos
2000 Lecture Notes in Computer Science  
It then shows the capability of the proposed model in modelling distributed multimedia environments  ...  However, little work has been done for the cases where the software components involved have real-time requirements.  ...  Conclusions In this paper we have addressed the issue of real-time coordination in parallel and distributed systems.  ... 
doi:10.1007/3-540-45591-4_93 fatcat:3knjterwqvczdgngas5n3otkk4

Fault Tolerance in Real Time Distributed System

Gajendra Sharma, Ankita Yadav
2018 Review of Computer Engineering Research  
When a fault present in real time distributed system is not detected and recovered properly on time then it results into failure of system.  ...  A task running on real time distributed system should be feasible, reliable and scalable, real time distributed systems like nuclear systems, robotics, air traffic control systems, grid etc. are highly  ...  According to Alain, et al. [3] the Algorithm Architecture Adequation (AAA) method will generate a static code automatically for real time distributed embedded system.  ... 
doi:10.18488/journal.76.2018.52.20.24 fatcat:pcxyzqg5qfhj5ohflaqpkagvlu

Load profiling in distributed real-time systems

Azer Bestavros
1997 Information Sciences  
Load balancing is often used to ensure that nodes in a distributed systems are equally loaded. In this paper, we show t h a t for real-time systems, load balancing is not desirable.  ...  The performance of the proposed protocol is evaluated via simulation, and is contrasted to other dynamic scheduling protocols for real-time distributed systems.  ...  Acknowledgments I would like to thank Dimitri Spartiotis for his work on implementing parts of the simulator for the distributed load-pro ling algorithm, and Krithi Ramamritham and Jack Stankovic for their  ... 
doi:10.1016/s0020-0255(97)00040-6 fatcat:ylhac3gy7fbgfe6hhy5ghdhpva

Multimedia Capabilities in Distributed Real-Time Applications [chapter]

Subhabrata Sen, Oscar González, Krithi Ramamritham, John A. Stankovic, Chia Shen, Morikazu Takegaki
1997 Real-Time Database Systems  
ACKNOWLEDGMENTS This research w as supported in part by a contract from the Community Management Sta 's Massive Digital Data Systems Program and Mitsubishi Electric Corporation.  ...  of a wide range of current and future real-time applications, such as distributed industrial control systems.  ...  To e ectively support real-time interactions between di erent e n tities in a company, a distributed real-time database with multimedia capabilities is vital.  ... 
doi:10.1007/978-1-4615-6161-3_8 fatcat:6gwncnl5dng3lha6taxmlrx7jq

Optimal and efficient adaptation in distributed real-time systems with discrete rates

Yingming Chen, Chenyang Lu, Xenofon D. Koutsoukos
2012 Real-time systems  
Many distributed real-time systems face the challenge of dynamically maximizing system utility and meeting stringent resource constraints in response to fluctuations in system workload.  ...  We present the Multi-Parametric Rate Adaptation (MPRA) algorithm for discrete rate adaptation in distributed real-time systems with end-to-end tasks.  ...  Real-time tasks must meet their end-to-end deadlines in distributed real-time systems.  ... 
doi:10.1007/s11241-012-9168-7 fatcat:lnlosquet5c7jhjeqnd6friqaa

Real-Time Performance Estimation for Dynamic, Distributed Real-Time Systems [chapter]

Eui-Nam Huh, Lonnie R. Welch, Y. Mun
2002 Lecture Notes in Computer Science  
A wrong system performance analysis can lead to a catastrophe in a dynamic real-time system.  ...  This is accomplished with a mathematical model and by accurate response time prediction for a periodic, dynamic distributed real-time application.  ...  Acknowledgements This work is supported in part by the Ministry of Information Communication of Korea, under the "Support Project of University Information Technology Research Center(ITRC)" supervised  ... 
doi:10.1007/3-540-47789-6_113 fatcat:j5hfrddtbzhnfexnyod4mmobja

Time Synchronization under 1PPS Signal in Distributed Real-time Simulation System

Xinyu Yao
2010 International Journal of Intelligent Systems and Applications  
Time synchronization is one of the key points in distributed of a real-time simulation system. At first, a distributed simulation system is introduced.  ...  Thirdly, the relevant technology of time synchronization are studied, including system structure, SNTP, 1PPS signal and control logic.  ...  ACKNOWLEDGMENT This work was supported in part by a grant from the National Natural Science Foundation of China (Grant No. 61074108).  ... 
doi:10.5815/ijisa.2010.02.07 fatcat:3rogabn7ojckjdirn7cm75z6va

Hierarchical control of multiple resources in distributed real-time and embedded systems

Nishanth Shankaran, Xenofon D. Koutsoukos, Douglas C. Schmidt, Yuan Xue, Chenyang Lu
2007 Real-time systems  
There is an increasing demand to introduce adaptive capabilities in distributed real-time and embedded (DRE) systems that execute in open environments where system operational conditions, input workload  ...  Third, we evaluate the performance of HiDRA via experiments on a representative DRE system that performs distributed target tracking in real-time.  ...  over the TAO [16] Real-time CORBA Object Request Broker to achieve desired real-time performance.  ... 
doi:10.1007/s11241-007-9014-5 fatcat:vqzk3ybm7jfb7mlydomlxi5yke
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