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An Environment for the Development of Concurrent Object-Based Applications

Fernando L. Dotti, Lucio M. Duarte, Luciana Foss, Leila Ribeiro, Daniela Russi, Osmar M. dos Santos
2005 Electronical Notes in Theoretical Computer Science  
In this paper we present the set of tools we have developed and/or integrated to build an environment for the development of concurrent object-based systems.  ...  On previous work we have mainly discussed the language along with case studies and analysis techniques (model checking and simulation) for systems described in OBGG.  ...  The Simulation interface graphically presents the simulation results to the user, currently this tool is not implemented. The structure of the Database is based on the one proposed in [17] .  ... 
doi:10.1016/j.entcs.2004.12.026 fatcat:z2wgeakauffznldexjndybfyaq

Towards a General Real-Time Database Simulator Software Library

Juha Taina, Sang H. Son
1999 IFAC Proceedings Volumes  
The goal of the library is to allow simulator designers to use a well tested and documented software to implement basic database simulator functionality.  ...  All additional and research-speci c functionality can be added on top of the library components.  ...  It is based on a set of CASE-tools along with a window-based user interface and a language to describe simulated environments.  ... 
doi:10.1016/s1474-6670(17)39968-8 fatcat:7nsg3bqrmzaydf5xurrwgfueiy

A Transactional Architecture for Simulation

Tim Hoverd, Adam T. Sampson
2010 2010 15th IEEE International Conference on Engineering of Complex Computer Systems  
We are developing a concurrent, agent-based approach to complex systems simulation as part of the CoSMoS project.  ...  In such simulations an agent's behaviour can typically be characterised as a series of queries and updates to its environment-a "transactional" pattern of interaction familiar to programmers of database  ...  ACKNOWLEDGEMENTS We would like to express our thanks to other members of the CoSMoS project, and in particular to Susan Stepney of the University of York for many helpful discussions.  ... 
doi:10.1109/iceccs.2010.7 dblp:conf/iceccs/HoverdS10 fatcat:7ayimjtnr5a3dexf6mq2sx2s7i

A Prudent-Precedence Concurrency Control Protocol for High Data Contention Database Enviornments

Weidong Xiong, Feng Yu, Mohammed Hamdi, Wen-Chi Hou
2016 International Journal of Database Management Systems  
In this paper, we propose a concurrency control protocol, called the Prudent-Precedence Concurrency Control (PPCC) protocol, for high data contention database environments.  ...  A detailed simulation model has been constructed and extensive experiments have been conducted to evaluate the performance of the proposed approach.  ...  Experimental Results In this section, we report the simulation results on the three protocols based on the above setups.  ... 
doi:10.5121/ijdms.2016.8501 fatcat:judtzomot5hlfhsctmmut52gpm

Design, Implementation and Performance Analysis of Concurrency Control Algorithm with Architecture for Temporal Database

Jaypalsinh A. Gohil, Prashant M. Dolia
2016 International Journal of Database Management Systems  
This research study proposes an efficient concurrency algorithm which is a mixture of both timestamp and locking approach suitable for temporal database environment where more than one users of distributed  ...  Concurrency control mechanism is one of the critical factors which affect the overall performance of database system.  ...  The algorithm is applied through trigger which either denies or allows a user session of a distributed transaction to perform its operation based on the concurrency control rules specified in algorithm  ... 
doi:10.5121/ijdms.2016.8503 fatcat:3yqsu5vnajdn7clij5eim5u6ea

Research issues in real-time database systems Survey paper

O Ulusoy
1995 Information Sciences  
In this paper, a basic understanding of the issues in real-time database systems is provided and the research efforts in this area are introduced.  ...  Management of real-time information through a database system requires the integration of concepts from both real-time systems and database systems.  ...  ), and target one of the environments in their study.  ... 
doi:10.1016/0020-0255(95)00130-1 fatcat:xpbewsfa3vb3jlbzxinnqehldy

A simulation-based approach for dynamic process management at web service platforms

T. Madhusudan, Young-Jun Son
2005 Computers & industrial engineering  
In this paper, we propose a simulation-based framework to guide scheduling of composite service execution.  ...  Online simulation of the dynamics of the open environment is used for scheduling service requests at the service platform.  ...  Acknowledgements We are grateful to the referees, whose comments have considerably improved the presentation of the ideas in this paper.  ... 
doi:10.1016/j.cie.2005.02.003 fatcat:nxjdrgogtffklgr23ge6mqqcri

Semantic multigranularity locking and its performance in object-oriented database systems

Kyoung-In Kwon, Songchun Moon
1998 Journal of systems architecture  
Our concurrency control scheme is applicable for realistic OODBSs in the presence of complex objects with shared subobjects. Lastly, we evaluate the performance of ISMGL by using a simulation study.  ...  Concurrency control schemes for object-oriented database systems (OODBSs) used in the area of performance-critical applications should increase the degree of concurrency and decrease locking overhead in  ...  Acknowledgements The authors wish to acknowledge the anonymous referees for their helpful comments.  ... 
doi:10.1016/s1383-7621(97)00069-6 fatcat:craquqibezg25myeyln65iwfi4

An Analytic Model for Performance Analysis of Concurrency Control Strategies in Mobile Environments

G.-C. Chen
1999 Computer journal  
Many performance studies have shown that locking based protocols outperform other concurrency control protocols in most database configurations and workloads.  ...  According to the experimental results we show that the behavior of mobile users and the degree of data contention have a significant impact on the relative performances of the concurrency control strategies  ...  CONCLUSION AND FUTURE WORK In this paper, we have presented a quantitative study and comparison of the performances of different concurrency control protocols in mobile environments.  ... 
doi:10.1093/comjnl/42.6.511 fatcat:vnicv2i6kff45pyiwevirqlwsq

An Aggressive Concurrency Control Protocol for Main Memory Databases

Mohammed Hamdi, Weidong Xiong, Feng Yu, Sarah Alswedani, Wen-Chi Hou
2016 International Journal of Computer Applications  
In this paper, we propose a concurrency control protocol, called the Prudent-Precedence Concurrency Control (PPCC) protocol, for high data contention main memory databases.  ...  A detailed simulation model has been constructed and extensive experiments have been conducted to evaluate the performance of the proposed approach.  ...  Experimental Results In this section, we report the simulation results on the two protocols based on the above setups.  ... 
doi:10.5120/ijca2016912260 fatcat:rxl7wstd3fby3fr7t7yaodp6tm

Evaluating servers with commercial workloads

K. Keeton, R. Clapp, A. Nanda
2003 Computer  
As a result, OLTP workloads spend a nonnegligible percentage of their execution time in the operating system.  ...  As a result, these applications are more sensitive to memory latencies. Researchers have also studied the impact of DSS workloads on server design.  ...  Although this approach has been used with some success, it does not capture the changes in the workload's execution based on the new system's environment.  ... 
doi:10.1109/mc.2003.1178043 fatcat:accb3hf7gfc5poiwktep3bm2dy

Automatic verification of external interrupt behaviors for microprocessor design

Fu-Ching Yang, Wen-Kai Huang, Ing-Jer Huang
2007 Proceedings - Design Automation Conference  
PEVT successfully identified several sophisticated remaining bugs with only less than 88,000 cycles of RTL simulation with execution time of 424 seconds in a SUN Blade2000 workstation.  ...  Interrupt behaviors, especially the external ones, are difficult to verify in a microprocessor design project in that they involve both interacting hardware and software.  ...  The second rule in the database checks the priority of external interrupts. This rule is based on the observation of concurrent interrupt in Section 3.1.  ... 
doi:10.1145/1278480.1278701 dblp:conf/dac/YangHH07 fatcat:qmam2kslkjeatgqazlxhecg2kq

Using Separate Processing for Read-Only Transactions in Mobile Environment [chapter]

Eddie Y. M. Chan, Victor C. S. Lee, Kwok-Wa Lam
2002 Lecture Notes in Computer Science  
Thus, both the update and read-only transactions can be executed in a more efficient manner.  ...  The performance of the protocol for Group Strong Consistency was examined through a series of simulation experiments.  ...  Based on Theorem 1, a read-only transaction Q reads inconsistent data if there is a cycle in the DP-graph of Q.  ... 
doi:10.1007/3-540-36389-0_8 fatcat:2pfdppqnd5bprlybiianvl6w7m

Simulation studies on concurrency control in parallel transaction processing systems

Jiahong Wang, Jie Li, Hisao Kameda
1997 Parallel Computing  
In this paper a simulation system for shared-nothing parallel TP systems was presented, which aims at, but is not restricted to, the studies of the CC methods.  ...  LW DC, was compared with 2PL and the well-known DWDL (distributed wait-depth limited) CC methods based on the presented simulation system.  ...  A simulation experiment In this section we present a simulation experiment which is based on the simulation system introduced in Section 2 and the CC methods introduced in Section 3.  ... 
doi:10.1016/s0167-8191(97)00019-7 fatcat:rr5ny7ilvnfgrhm6qgkooprjaq

On using similarity for concurrency control in real-time database systems

Kam-yiu Lam, Wai-cheong Yau
1998 Journal of Systems and Software  
By studying the correctness requirements of the stock trading database applications, a real-time two phase locking protocol, High Priority 2 Phase Locking (H2PL) is re-defined based on similarity.  ...  Most of the proposed concurrency control protocols for real-time database systems (RTDBS) are based on serializability theorem.  ...  In the central database site, there is a CPU and a disk which stores the database. A modified version of H2PL [Abbo88] based on similarity is defined for concurrency control.  ... 
doi:10.1016/s0164-1212(98)10035-3 fatcat:wwaht7amynfrzblgvajgrqd5x4
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